1 /* Definitions of target machine for Mitsubishi D30V.
2 Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 /* D30V specific macros */
26 /* Align an address */
27 #define D30V_ALIGN(addr,align) (((addr) + (align) - 1) & ~((align) - 1))
30 /* Set up System V.4 (aka ELF) defaults. */
34 /* Driver configuration */
36 /* A C expression which determines whether the option `-CHAR' takes arguments.
37 The value should be the number of arguments that option takes-zero, for many
40 By default, this macro is defined to handle the standard options properly.
41 You need not define it unless you wish to add additional options which take
45 /* #define SWITCH_TAKES_ARG(CHAR) */
47 /* A C expression which determines whether the option `-NAME' takes arguments.
48 The value should be the number of arguments that option takes-zero, for many
49 options. This macro rather than `SWITCH_TAKES_ARG' is used for
50 multi-character option names.
52 By default, this macro is defined as `DEFAULT_WORD_SWITCH_TAKES_ARG', which
53 handles the standard options properly. You need not define
54 `WORD_SWITCH_TAKES_ARG' unless you wish to add additional options which take
55 arguments. Any redefinition should call `DEFAULT_WORD_SWITCH_TAKES_ARG' and
56 then check for additional options.
59 /* #define WORD_SWITCH_TAKES_ARG(NAME) */
61 /* A string-valued C expression which is nonempty if the linker needs a space
62 between the `-L' or `-o' option and its argument.
64 If this macro is not defined, the default value is 0. */
65 /* #define SWITCHES_NEED_SPACES "" */
67 /* A C string constant that tells the GNU CC driver program options to pass to
68 CPP. It can also specify how to translate options you give to GNU CC into
69 options for GNU CC to pass to the CPP.
71 Do not define this macro if it does not need to do anything. */
72 /* #define CPP_SPEC "" */
74 /* If this macro is defined, the preprocessor will not define the builtin macro
75 `__SIZE_TYPE__'. The macro `__SIZE_TYPE__' must then be defined by
78 This should be defined if `SIZE_TYPE' depends on target dependent flags
79 which are not accessible to the preprocessor. Otherwise, it should not be
81 /* #define NO_BUILTIN_SIZE_TYPE */
83 /* If this macro is defined, the preprocessor will not define the builtin macro
84 `__PTRDIFF_TYPE__'. The macro `__PTRDIFF_TYPE__' must then be defined by
87 This should be defined if `PTRDIFF_TYPE' depends on target dependent flags
88 which are not accessible to the preprocessor. Otherwise, it should not be
90 /* #define NO_BUILTIN_PTRDIFF_TYPE */
92 /* A C string constant that tells the GNU CC driver program options to pass to
93 CPP. By default, this macro is defined to pass the option
94 `-D__CHAR_UNSIGNED__' to CPP if `char' will be treated as `unsigned char' by
97 Do not define this macro unless you need to override the default definition. */
98 /* #if DEFAULT_SIGNED_CHAR
99 #define SIGNED_CHAR_SPEC "%{funsigned-char:-D__CHAR_UNSIGNED__}"
101 #define SIGNED_CHAR_SPEC "%{!fsigned-char:-D__CHAR_UNSIGNED__}"
104 /* A C string constant that tells the GNU CC driver program options to pass to
105 `cc1'. It can also specify how to translate options you give to GNU CC into
106 options for GNU CC to pass to the `cc1'.
108 Do not define this macro if it does not need to do anything. */
109 /* #define CC1_SPEC "" */
111 /* A C string constant that tells the GNU CC driver program options to pass to
112 `cc1plus'. It can also specify how to translate options you give to GNU CC
113 into options for GNU CC to pass to the `cc1plus'.
115 Do not define this macro if it does not need to do anything. */
116 /* #define CC1PLUS_SPEC "" */
118 /* A C string constant that tells the GNU CC driver program options to pass to
119 the assembler. It can also specify how to translate options you give to GNU
120 CC into options for GNU CC to pass to the assembler. See the file `sun3.h'
121 for an example of this.
123 Do not define this macro if it does not need to do anything.
125 Defined in svr4.h. */
128 %{!mno-asm-optimize: %{O*: %{!O0: -O} %{O0: %{masm-optimize: -O}}}} \
129 %{v} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
131 /* A C string constant that tells the GNU CC driver program how to run any
132 programs which cleanup after the normal assembler. Normally, this is not
133 needed. See the file `mips.h' for an example of this.
135 Do not define this macro if it does not need to do anything.
137 Defined in svr4.h. */
138 /* #define ASM_FINAL_SPEC "" */
140 /* A C string constant that tells the GNU CC driver program options to pass to
141 the linker. It can also specify how to translate options you give to GNU CC
142 into options for GNU CC to pass to the linker.
144 Do not define this macro if it does not need to do anything.
146 Defined in svr4.h. */
151 %{static:-dn -Bstatic} \
152 %{shared:-G -dy -z text} \
153 %{symbolic:-Bsymbolic -G -dy -z text} \
157 %{mextmem: -m d30v_e} %{mextmemory: -m d30v_e} %{monchip: -m d30v_o}"
159 /* Another C string constant used much like `LINK_SPEC'. The difference
160 between the two is that `LIB_SPEC' is used at the end of the command given
163 If this macro is not defined, a default is provided that loads the standard
164 C library from the usual place. See `gcc.c'.
166 Defined in svr4.h. */
168 #define LIB_SPEC "--start-group -lsim -lc --end-group"
170 /* Another C string constant that tells the GNU CC driver program how and when
171 to place a reference to `libgcc.a' into the linker command line. This
172 constant is placed both before and after the value of `LIB_SPEC'.
174 If this macro is not defined, the GNU CC driver provides a default that
175 passes the string `-lgcc' to the linker unless the `-shared' option is
177 /* #define LIBGCC_SPEC "" */
179 /* Another C string constant used much like `LINK_SPEC'. The difference
180 between the two is that `STARTFILE_SPEC' is used at the very beginning of
181 the command given to the linker.
183 If this macro is not defined, a default is provided that loads the standard
184 C startup file from the usual place. See `gcc.c'.
186 Defined in svr4.h. */
188 #undef STARTFILE_SPEC
189 #define STARTFILE_SPEC "crt0%O%s crtbegin%O%s"
191 /* Another C string constant used much like `LINK_SPEC'. The difference
192 between the two is that `ENDFILE_SPEC' is used at the very end of the
193 command given to the linker.
195 Do not define this macro if it does not need to do anything.
197 Defined in svr4.h. */
200 #define ENDFILE_SPEC "crtend%O%s"
202 /* Define this macro if the driver program should find the library `libgcc.a'
203 itself and should not pass `-L' options to the linker. If you do not define
204 this macro, the driver program will pass the argument `-lgcc' to tell the
205 linker to do the search and will pass `-L' options to it. */
206 /* #define LINK_LIBGCC_SPECIAL */
208 /* Define this macro if the driver program should find the library `libgcc.a'.
209 If you do not define this macro, the driver program will pass the argument
210 `-lgcc' to tell the linker to do the search. This macro is similar to
211 `LINK_LIBGCC_SPECIAL', except that it does not affect `-L' options. */
212 /* #define LINK_LIBGCC_SPECIAL_1 */
214 /* Define this macro to provide additional specifications to put in the `specs'
215 file that can be used in various specifications like `CC1_SPEC'.
217 The definition should be an initializer for an array of structures,
218 containing a string constant, that defines the specification name, and a
219 string constant that provides the specification.
221 Do not define this macro if it does not need to do anything. */
222 /* #define EXTRA_SPECS {{}} */
224 /* Define this macro as a C expression for the initializer of an array of
225 string to tell the driver program which options are defaults for this target
226 and thus do not need to be handled specially when using `MULTILIB_OPTIONS'.
228 Do not define this macro if `MULTILIB_OPTIONS' is not defined in the target
229 makefile fragment or if none of the options listed in `MULTILIB_OPTIONS' are
230 set by default. *Note Target Fragment::. */
231 /* #define MULTILIB_DEFAULTS {} */
233 /* Define this macro to tell `gcc' that it should only translate a `-B' prefix
234 into a `-L' linker option if the prefix indicates an absolute file name. */
235 /* #define RELATIVE_PREFIX_NOT_LINKDIR */
237 /* Define this macro as a C string constant if you wish to override the
238 standard choice of `/usr/local/lib/gcc-lib/' as the default prefix to try
239 when searching for the executable files of the compiler. */
240 /* #define STANDARD_EXEC_PREFIX "" */
242 /* If defined, this macro is an additional prefix to try after
243 `STANDARD_EXEC_PREFIX'. `MD_EXEC_PREFIX' is not searched when the `-b'
244 option is used, or the compiler is built as a cross compiler.
246 Defined in svr4.h for host compilers. */
247 /* #define MD_EXEC_PREFIX "" */
249 /* Define this macro as a C string constant if you wish to override the
250 standard choice of `/usr/local/lib/' as the default prefix to try when
251 searching for startup files such as `crt0.o'. */
252 /* #define STANDARD_STARTFILE_PREFIX "" */
254 /* If defined, this macro supplies an additional prefix to try after the
255 standard prefixes. `MD_EXEC_PREFIX' is not searched when the `-b' option is
256 used, or when the compiler is built as a cross compiler.
258 Defined in svr4.h for host compilers. */
259 /* #define MD_STARTFILE_PREFIX "" */
261 /* If defined, this macro supplies yet another prefix to try after the standard
262 prefixes. It is not searched when the `-b' option is used, or when the
263 compiler is built as a cross compiler. */
264 /* #define MD_STARTFILE_PREFIX_1 "" */
266 /* Define this macro as a C string constant if you with to set environment
267 variables for programs called by the driver, such as the assembler and
268 loader. The driver passes the value of this macro to `putenv' to initialize
269 the necessary environment variables. */
270 /* #define INIT_ENVIRONMENT "" */
272 /* Define this macro as a C string constant if you wish to override the
273 standard choice of `/usr/local/include' as the default prefix to try when
274 searching for local header files. `LOCAL_INCLUDE_DIR' comes before
275 `SYSTEM_INCLUDE_DIR' in the search order.
277 Cross compilers do not use this macro and do not search either
278 `/usr/local/include' or its replacement. */
279 /* #define LOCAL_INCLUDE_DIR "" */
281 /* Define this macro as a C string constant if you wish to specify a
282 system-specific directory to search for header files before the standard
283 directory. `SYSTEM_INCLUDE_DIR' comes before `STANDARD_INCLUDE_DIR' in the
286 Cross compilers do not use this macro and do not search the directory
288 /* #define SYSTEM_INCLUDE_DIR "" */
290 /* Define this macro as a C string constant if you wish to override the
291 standard choice of `/usr/include' as the default prefix to try when
292 searching for header files.
294 Cross compilers do not use this macro and do not search either
295 `/usr/include' or its replacement. */
296 /* #define STANDARD_INCLUDE_DIR "" */
298 /* Define this macro if you wish to override the entire default search path for
299 include files. The default search path includes `GCC_INCLUDE_DIR',
300 `LOCAL_INCLUDE_DIR', `SYSTEM_INCLUDE_DIR', `GPLUSPLUS_INCLUDE_DIR', and
301 `STANDARD_INCLUDE_DIR'. In addition, `GPLUSPLUS_INCLUDE_DIR' and
302 `GCC_INCLUDE_DIR' are defined automatically by `Makefile', and specify
303 private search areas for GCC. The directory `GPLUSPLUS_INCLUDE_DIR' is used
304 only for C++ programs.
306 The definition should be an initializer for an array of structures. Each
307 array element should have two elements: the directory name (a string
308 constant) and a flag for C++-only directories. Mark the end of the array
309 with a null element. For example, here is the definition used for VMS:
311 #define INCLUDE_DEFAULTS \
313 { "GNU_GXX_INCLUDE:", 1}, \
314 { "GNU_CC_INCLUDE:", 0}, \
315 { "SYS$SYSROOT:[SYSLIB.]", 0}, \
320 Here is the order of prefixes tried for exec files:
322 1. Any prefixes specified by the user with `-B'.
324 2. The environment variable `GCC_EXEC_PREFIX', if any.
326 3. The directories specified by the environment variable
329 4. The macro `STANDARD_EXEC_PREFIX'.
333 6. The macro `MD_EXEC_PREFIX', if any.
335 Here is the order of prefixes tried for startfiles:
337 1. Any prefixes specified by the user with `-B'.
339 2. The environment variable `GCC_EXEC_PREFIX', if any.
341 3. The directories specified by the environment variable
342 `LIBRARY_PATH' (native only, cross compilers do not use this).
344 4. The macro `STANDARD_EXEC_PREFIX'.
348 6. The macro `MD_EXEC_PREFIX', if any.
350 7. The macro `MD_STARTFILE_PREFIX', if any.
352 8. The macro `STANDARD_STARTFILE_PREFIX'.
357 /* #define INCLUDE_DEFAULTS {{ }} */
360 /* Run-time target specifications */
362 /* Define this to be a string constant containing `-D' options to define the
363 predefined macros that identify this machine and system. These macros will
364 be predefined unless the `-ansi' option is specified.
366 In addition, a parallel set of macros are predefined, whose names are made
367 by appending `__' at the beginning and at the end. These `__' macros are
368 permitted by the ANSI standard, so they are predefined regardless of whether
369 `-ansi' is specified.
371 For example, on the Sun, one can use the following value:
373 "-Dmc68000 -Dsun -Dunix"
375 The result is to define the macros `__mc68000__', `__sun__' and `__unix__'
376 unconditionally, and the macros `mc68000', `sun' and `unix' provided `-ansi'
378 #define CPP_PREDEFINES "-D__D30V__ -Amachine=d30v"
380 /* This declaration should be present. */
381 extern int target_flags;
383 /* This series of macros is to allow compiler command arguments to enable or
384 disable the use of optional features of the target machine. For example,
385 one machine description serves both the 68000 and the 68020; a command
386 argument tells the compiler whether it should use 68020-only instructions or
387 not. This command argument works by means of a macro `TARGET_68020' that
388 tests a bit in `target_flags'.
390 Define a macro `TARGET_FEATURENAME' for each such option. Its definition
391 should test a bit in `target_flags'; for example:
393 #define TARGET_68020 (target_flags & 1)
395 One place where these macros are used is in the condition-expressions of
396 instruction patterns. Note how `TARGET_68020' appears frequently in the
397 68000 machine description file, `m68k.md'. Another place they are used is
398 in the definitions of the other macros in the `MACHINE.h' file. */
400 #define MASK_NO_COND_MOVE 0x00000001 /* disable conditional moves */
402 #define MASK_DEBUG_ARG 0x10000000 /* debug argument handling */
403 #define MASK_DEBUG_STACK 0x20000000 /* debug stack allocations */
404 #define MASK_DEBUG_ADDR 0x40000000 /* debug GO_IF_LEGITIMATE_ADDRESS */
406 #define TARGET_NO_COND_MOVE (target_flags & MASK_NO_COND_MOVE)
407 #define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG)
408 #define TARGET_DEBUG_STACK (target_flags & MASK_DEBUG_STACK)
409 #define TARGET_DEBUG_ADDR (target_flags & MASK_DEBUG_ADDR)
411 #define TARGET_COND_MOVE (! TARGET_NO_COND_MOVE)
413 /* Default switches used. */
414 #ifndef TARGET_DEFAULT
415 #define TARGET_DEFAULT 0
418 /* This macro defines names of command options to set and clear bits in
419 `target_flags'. Its definition is an initializer with a subgrouping for
422 Each subgrouping contains a string constant, that defines the option name,
423 and a number, which contains the bits to set in `target_flags'. A negative
424 number says to clear bits instead; the negative of the number is which bits
425 to clear. The actual option name is made by appending `-m' to the specified
428 One of the subgroupings should have a null string. The number in this
429 grouping is the default value for `target_flags'. Any target options act
430 starting with that value.
432 Here is an example which defines `-m68000' and `-m68020' with opposite
433 meanings, and picks the latter as the default:
435 #define TARGET_SWITCHES \
440 #define TARGET_SWITCHES \
442 { "cond-move", -MASK_NO_COND_MOVE }, \
443 { "no-cond-move", MASK_NO_COND_MOVE }, \
444 { "debug-arg", MASK_DEBUG_ARG }, \
445 { "debug-stack", MASK_DEBUG_STACK }, \
446 { "debug-addr", MASK_DEBUG_ADDR }, \
447 { "asm-optimize", 0 }, \
448 { "no-asm-optimize", 0 }, \
450 { "extmemory", 0 }, \
452 { "", TARGET_DEFAULT }, \
455 /* This macro is similar to `TARGET_SWITCHES' but defines names of command
456 options that have values. Its definition is an initializer with a
457 subgrouping for each command option.
459 Each subgrouping contains a string constant, that defines the fixed part of
460 the option name, and the address of a variable. The variable, type `char
461 *', is set to the variable part of the given option if the fixed part
462 matches. The actual option name is made by appending `-m' to the specified
465 Here is an example which defines `-mshort-data-NUMBER'. If the given option
466 is `-mshort-data-512', the variable `m88k_short_data' will be set to the
469 extern char *m88k_short_data;
470 #define TARGET_OPTIONS \
471 { { "short-data-", &m88k_short_data } } */
473 #define TARGET_OPTIONS \
475 {"branch-cost=", &d30v_branch_cost_string}, \
476 {"cond-exec=", &d30v_cond_exec_string}, \
479 /* This macro is a C statement to print on `stderr' a string describing the
480 particular machine description choice. Every machine description should
481 define `TARGET_VERSION'. For example:
484 #define TARGET_VERSION \
485 fprintf (stderr, " (68k, Motorola syntax)");
487 #define TARGET_VERSION \
488 fprintf (stderr, " (68k, MIT syntax)");
490 #define TARGET_VERSION fprintf (stderr, " d30v")
492 /* Sometimes certain combinations of command options do not make sense on a
493 particular target machine. You can define a macro `OVERRIDE_OPTIONS' to
494 take account of this. This macro, if defined, is executed once just after
495 all the command options have been parsed.
497 Don't use this macro to turn on various extra optimizations for `-O'. That
498 is what `OPTIMIZATION_OPTIONS' is for. */
500 #define OVERRIDE_OPTIONS override_options ()
502 /* Some machines may desire to change what optimizations are performed for
503 various optimization levels. This macro, if defined, is executed once just
504 after the optimization level is determined and before the remainder of the
505 command options have been parsed. Values set in this macro are used as the
506 default values for the other command line options.
508 LEVEL is the optimization level specified; 2 if `-O2' is specified, 1 if
509 `-O' is specified, and 0 if neither is specified.
511 SIZE is non-zero if `-Os' is specified, 0 otherwise.
513 You should not use this macro to change options that are not
514 machine-specific. These should uniformly selected by the same optimization
515 level on all supported machines. Use this macro to enable machbine-specific
518 *Do not examine `write_symbols' in this macro!* The debugging options are
519 *not supposed to alter the generated code. */
520 /* #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) */
522 /* Define this macro if debugging can be performed even without a frame
523 pointer. If this macro is defined, GNU CC will turn on the
524 `-fomit-frame-pointer' option whenever `-O' is specified. */
525 #define CAN_DEBUG_WITHOUT_FP
530 /* Define this macro to have the value 1 if the most significant bit in a byte
531 has the lowest number; otherwise define it to have the value zero. This
532 means that bit-field instructions count from the most significant bit. If
533 the machine has no bit-field instructions, then this must still be defined,
534 but it doesn't matter which value it is defined to. This macro need not be
537 This macro does not affect the way structure fields are packed into bytes or
538 words; that is controlled by `BYTES_BIG_ENDIAN'. */
539 #define BITS_BIG_ENDIAN 1
541 /* Define this macro to have the value 1 if the most significant byte in a word
542 has the lowest number. This macro need not be a constant. */
543 #define BYTES_BIG_ENDIAN 1
545 /* Define this macro to have the value 1 if, in a multiword object, the most
546 significant word has the lowest number. This applies to both memory
547 locations and registers; GNU CC fundamentally assumes that the order of
548 words in memory is the same as the order in registers. This macro need not
550 #define WORDS_BIG_ENDIAN 1
552 /* Define this macro if WORDS_BIG_ENDIAN is not constant. This must be a
553 constant value with the same meaning as WORDS_BIG_ENDIAN, which will be used
554 only when compiling libgcc2.c. Typically the value will be set based on
555 preprocessor defines. */
556 /* #define LIBGCC2_WORDS_BIG_ENDIAN */
558 /* Define this macro to have the value 1 if `DFmode', `XFmode' or `TFmode'
559 floating point numbers are stored in memory with the word containing the
560 sign bit at the lowest address; otherwise define it to have the value 0.
561 This macro need not be a constant.
563 You need not define this macro if the ordering is the same as for multi-word
565 /* #define FLOAT_WORDS_BIG_EnNDIAN */
567 /* Define this macro to be the number of bits in an addressable storage unit
568 (byte); normally 8. */
569 #define BITS_PER_UNIT 8
571 /* Number of bits in a word; normally 32. */
572 #define BITS_PER_WORD 32
574 /* Maximum number of bits in a word. If this is undefined, the default is
575 `BITS_PER_WORD'. Otherwise, it is the constant value that is the largest
576 value that `BITS_PER_WORD' can have at run-time. */
577 /* #define MAX_BITS_PER_WORD */
579 /* Number of storage units in a word; normally 4. */
580 #define UNITS_PER_WORD 4
582 /* Minimum number of units in a word. If this is undefined, the default is
583 `UNITS_PER_WORD'. Otherwise, it is the constant value that is the smallest
584 value that `UNITS_PER_WORD' can have at run-time. */
585 /* #define MIN_UNITS_PER_WORD */
587 /* Width of a pointer, in bits. You must specify a value no wider than the
588 width of `Pmode'. If it is not equal to the width of `Pmode', you must
589 define `POINTERS_EXTEND_UNSIGNED'. */
590 #define POINTER_SIZE 32
592 /* A C expression whose value is nonzero if pointers that need to be extended
593 from being `POINTER_SIZE' bits wide to `Pmode' are sign-extended and zero if
594 they are zero-extended.
596 You need not define this macro if the `POINTER_SIZE' is equal to the width
598 /* #define POINTERS_EXTEND_UNSIGNED */
600 /* A macro to update M and UNSIGNEDP when an object whose type is TYPE and
601 which has the specified mode and signedness is to be stored in a register.
602 This macro is only called when TYPE is a scalar type.
604 On most RISC machines, which only have operations that operate on a full
605 register, define this macro to set M to `word_mode' if M is an integer mode
606 narrower than `BITS_PER_WORD'. In most cases, only integer modes should be
607 widened because wider-precision floating-point operations are usually more
608 expensive than their narrower counterparts.
610 For most machines, the macro definition does not change UNSIGNEDP. However,
611 some machines, have instructions that preferentially handle either signed or
612 unsigned quantities of certain modes. For example, on the DEC Alpha, 32-bit
613 loads from memory and 32-bit add instructions sign-extend the result to 64
614 bits. On such machines, set UNSIGNEDP according to which kind of extension
617 Do not define this macro if it would never modify M. */
618 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
620 if (GET_MODE_CLASS (MODE) == MODE_INT \
621 && GET_MODE_SIZE (MODE) < 4) \
625 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
626 be done for outgoing function arguments. */
627 /* #define PROMOTE_FUNCTION_ARGS */
629 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
630 be done for the return value of functions.
632 If this macro is defined, `FUNCTION_VALUE' must perform the same promotions
633 done by `PROMOTE_MODE'. */
634 /* #define PROMOTE_FUNCTION_RETURN */
636 /* Define this macro if the promotion described by `PROMOTE_MODE' should *only*
637 be performed for outgoing function arguments or function return values, as
638 specified by `PROMOTE_FUNCTION_ARGS' and `PROMOTE_FUNCTION_RETURN',
640 /* #define PROMOTE_FOR_CALL_ONLY */
642 /* Normal alignment required for function parameters on the stack, in bits.
643 All stack parameters receive at least this much alignment regardless of data
644 type. On most machines, this is the same as the size of an integer. */
646 #define PARM_BOUNDARY 32
648 /* Define this macro if you wish to preserve a certain alignment for the stack
649 pointer. The definition is a C expression for the desired alignment
652 If `PUSH_ROUNDING' is not defined, the stack will always be aligned to the
653 specified boundary. If `PUSH_ROUNDING' is defined and specifies a less
654 strict alignment than `STACK_BOUNDARY', the stack may be momentarily
655 unaligned while pushing arguments. */
657 #define STACK_BOUNDARY 64
659 /* Alignment required for a function entry point, in bits. */
661 #define FUNCTION_BOUNDARY 64
663 /* Biggest alignment that any data type can require on this machine,
666 #define BIGGEST_ALIGNMENT 64
668 /* Biggest alignment that any structure field can require on this machine, in
669 bits. If defined, this overrides `BIGGEST_ALIGNMENT' for structure fields
671 /* #define BIGGEST_FIELD_ALIGNMENT */
673 /* Biggest alignment supported by the object file format of this machine. Use
674 this macro to limit the alignment which can be specified using the
675 `__attribute__ ((aligned (N)))' construct. If not defined, the default
676 value is `BIGGEST_ALIGNMENT'.
678 Defined in svr4.h. */
679 /* #define MAX_OFILE_ALIGNMENT */
681 /* If defined, a C expression to compute the alignment for a static variable.
682 TYPE is the data type, and BASIC-ALIGN is the alignment that the object
683 would ordinarily have. The value of this macro is used instead of that
684 alignment to align the object.
686 If this macro is not defined, then BASIC-ALIGN is used.
688 One use of this macro is to increase alignment of medium-size data to make
689 it all fit in fewer cache lines. Another is to cause character arrays to be
690 word-aligned so that `strcpy' calls that copy constants to character arrays
691 can be done inline. */
693 #define DATA_ALIGNMENT(TYPE, ALIGN) \
694 (TREE_CODE (TYPE) == ARRAY_TYPE \
695 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
696 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
698 /* If defined, a C expression to compute the alignment given to a constant that
699 is being placed in memory. CONSTANT is the constant and BASIC-ALIGN is the
700 alignment that the object would ordinarily have. The value of this macro is
701 used instead of that alignment to align the object.
703 If this macro is not defined, then BASIC-ALIGN is used.
705 The typical use of this macro is to increase alignment for string constants
706 to be word aligned so that `strcpy' calls that copy constants can be done
709 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
710 (TREE_CODE (EXP) == STRING_CST \
711 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
713 /* Alignment in bits to be given to a structure bit field that follows an empty
714 field such as `int : 0;'.
716 Note that `PCC_BITFIELD_TYPE_MATTERS' also affects the alignment that
717 results from an empty field. */
718 /* #define EMPTY_FIELD_BOUNDARY */
720 /* Number of bits which any structure or union's size must be a multiple of.
721 Each structure or union's size is rounded up to a multiple of this.
723 If you do not define this macro, the default is the same as `BITS_PER_UNIT'. */
724 /* #define STRUCTURE_SIZE_BOUNDARY */
726 /* Define this macro to be the value 1 if instructions will fail to work if
727 given data not on the nominal alignment. If instructions will merely go
728 slower in that case, define this macro as 0. */
730 #define STRICT_ALIGNMENT 1
732 /* Define this if you wish to imitate the way many other C compilers handle
733 alignment of bitfields and the structures that contain them.
735 The behavior is that the type written for a bitfield (`int', `short', or
736 other integer type) imposes an alignment for the entire structure, as if the
737 structure really did contain an ordinary field of that type. In addition,
738 the bitfield is placed within the structure so that it would fit within such
739 a field, not crossing a boundary for it.
741 Thus, on most machines, a bitfield whose type is written as `int' would not
742 cross a four-byte boundary, and would force four-byte alignment for the
743 whole structure. (The alignment used may not be four bytes; it is
744 controlled by the other alignment parameters.)
746 If the macro is defined, its definition should be a C expression; a nonzero
747 value for the expression enables this behavior.
749 Note that if this macro is not defined, or its value is zero, some bitfields
750 may cross more than one alignment boundary. The compiler can support such
751 references if there are `insv', `extv', and `extzv' insns that can directly
754 The other known way of making bitfields work is to define
755 `STRUCTURE_SIZE_BOUNDARY' as large as `BIGGEST_ALIGNMENT'. Then every
756 structure can be accessed with fullwords.
758 Unless the machine has bitfield instructions or you define
759 `STRUCTURE_SIZE_BOUNDARY' that way, you must define
760 `PCC_BITFIELD_TYPE_MATTERS' to have a nonzero value.
762 If your aim is to make GNU CC use the same conventions for laying out
763 bitfields as are used by another compiler, here is how to investigate what
764 the other compiler does. Compile and run this program:
782 printf ("Size of foo1 is %d\n",
783 sizeof (struct foo1));
784 printf ("Size of foo2 is %d\n",
785 sizeof (struct foo2));
789 If this prints 2 and 5, then the compiler's behavior is what you would get
790 from `PCC_BITFIELD_TYPE_MATTERS'.
792 Defined in svr4.h. */
794 #define PCC_BITFIELD_TYPE_MATTERS 1
796 /* Like PCC_BITFIELD_TYPE_MATTERS except that its effect is limited to aligning
797 a bitfield within the structure. */
798 /* #define BITFIELD_NBYTES_LIMITED */
800 /* Define this macro as an expression for the overall size of a structure
801 (given by STRUCT as a tree node) when the size computed from the fields is
802 SIZE and the alignment is ALIGN.
804 The default is to round SIZE up to a multiple of ALIGN. */
805 /* #define ROUND_TYPE_SIZE(STRUCT, SIZE, ALIGN) */
807 /* Define this macro as an expression for the alignment of a structure (given
808 by STRUCT as a tree node) if the alignment computed in the usual way is
809 COMPUTED and the alignment explicitly specified was SPECIFIED.
811 The default is to use SPECIFIED if it is larger; otherwise, use the smaller
812 of COMPUTED and `BIGGEST_ALIGNMENT' */
813 /* #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) */
815 /* An integer expression for the size in bits of the largest integer machine
816 mode that should actually be used. All integer machine modes of this size
817 or smaller can be used for structures and unions with the appropriate sizes.
818 If this macro is undefined, `GET_MODE_BITSIZE (DImode)' is assumed. */
819 /* #define MAX_FIXED_MODE_SIZE */
821 /* A C statement to validate the value VALUE (of type `double') for mode MODE.
822 This means that you check whether VALUE fits within the possible range of
823 values for mode MODE on this target machine. The mode MODE is always a mode
824 of class `MODE_FLOAT'. OVERFLOW is nonzero if the value is already known to
827 If VALUE is not valid or if OVERFLOW is nonzero, you should set OVERFLOW to
828 1 and then assign some valid value to VALUE. Allowing an invalid value to
829 go through the compiler can produce incorrect assembler code which may even
830 cause Unix assemblers to crash.
832 This macro need not be defined if there is no work for it to do. */
833 /* #define CHECK_FLOAT_VALUE(MODE, VALUE, OVERFLOW) */
835 /* A code distinguishing the floating point format of the target machine.
836 There are three defined values:
839 This code indicates IEEE floating point. It is the default;
840 there is no need to define this macro when the format is IEEE.
843 This code indicates the peculiar format used on the Vax.
845 UNKNOWN_FLOAT_FORMAT'
846 This code indicates any other format.
848 The value of this macro is compared with `HOST_FLOAT_FORMAT' (*note
849 Config::.) to determine whether the target machine has the same format as
850 the host machine. If any other formats are actually in use on supported
851 machines, new codes should be defined for them.
853 The ordering of the component words of floating point values stored in
854 memory is controlled by `FLOAT_WORDS_BIG_ENDIAN' for the target machine and
855 `HOST_FLOAT_WORDS_BIG_ENDIAN' for the host. */
856 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
858 /* GNU CC supports two ways of implementing C++ vtables: traditional or with
859 so-called "thunks". The flag `-fvtable-thunk' chooses between them. Define
860 this macro to be a C expression for the default value of that flag. If
861 `DEFAULT_VTABLE_THUNKS' is 0, GNU CC uses the traditional implementation by
862 default. The "thunk" implementation is more efficient (especially if you
863 have provided an implementation of `ASM_OUTPUT_MI_THUNK', see *Note Function
864 Entry::), but is not binary compatible with code compiled using the
865 traditional implementation. If you are writing a new ports, define
866 `DEFAULT_VTABLE_THUNKS' to 1.
868 If you do not define this macro, the default for `-fvtable-thunk' is 0. */
869 #define DEFAULT_VTABLE_THUNKS 0
872 /* Layout of Source Language Data Types */
874 /* A C expression for the size in bits of the type `int' on the target machine.
875 If you don't define this, the default is one word. */
876 #define INT_TYPE_SIZE 32
878 /* Maximum number for the size in bits of the type `int' on the target machine.
879 If this is undefined, the default is `INT_TYPE_SIZE'. Otherwise, it is the
880 constant value that is the largest value that `INT_TYPE_SIZE' can have at
881 run-time. This is used in `cpp'. */
882 /* #define MAX_INT_TYPE_SIZE */
884 /* A C expression for the size in bits of the type `short' on the target
885 machine. If you don't define this, the default is half a word. (If this
886 would be less than one storage unit, it is rounded up to one unit.) */
887 #define SHORT_TYPE_SIZE 16
889 /* A C expression for the size in bits of the type `long' on the target
890 machine. If you don't define this, the default is one word. */
891 #define LONG_TYPE_SIZE 32
893 /* Maximum number for the size in bits of the type `long' on the target
894 machine. If this is undefined, the default is `LONG_TYPE_SIZE'. Otherwise,
895 it is the constant value that is the largest value that `LONG_TYPE_SIZE' can
896 have at run-time. This is used in `cpp'. */
897 /* #define MAX_LONG_TYPE_SIZE */
899 /* A C expression for the size in bits of the type `long long' on the target
900 machine. If you don't define this, the default is two words. If you want
901 to support GNU Ada on your machine, the value of macro must be at least 64. */
902 #define LONG_LONG_TYPE_SIZE 64
904 /* A C expression for the size in bits of the type `char' on the target
905 machine. If you don't define this, the default is one quarter of a word.
906 (If this would be less than one storage unit, it is rounded up to one unit.) */
907 #define CHAR_TYPE_SIZE 8
909 /* Maximum number for the size in bits of the type `char' on the target
910 machine. If this is undefined, the default is `CHAR_TYPE_SIZE'. Otherwise,
911 it is the constant value that is the largest value that `CHAR_TYPE_SIZE' can
912 have at run-time. This is used in `cpp'. */
913 /* #define MAX_CHAR_TYPE_SIZE */
915 /* A C expression for the size in bits of the type `float' on the target
916 machine. If you don't define this, the default is one word. */
917 #define FLOAT_TYPE_SIZE 32
919 /* A C expression for the size in bits of the type `double' on the target
920 machine. If you don't define this, the default is two words. */
921 #define DOUBLE_TYPE_SIZE 64
923 /* A C expression for the size in bits of the type `long double' on the target
924 machine. If you don't define this, the default is two words. */
925 #define LONG_DOUBLE_TYPE_SIZE 64
927 /* An expression whose value is 1 or 0, according to whether the type `char'
928 should be signed or unsigned by default. The user can always override this
929 default with the options `-fsigned-char' and `-funsigned-char'. */
930 #define DEFAULT_SIGNED_CHAR 1
932 /* A C expression to determine whether to give an `enum' type only as many
933 bytes as it takes to represent the range of possible values of that type. A
934 nonzero value means to do that; a zero value means all `enum' types should
935 be allocated like `int'.
937 If you don't define the macro, the default is 0. */
938 /* #define DEFAULT_SHORT_ENUMS */
940 /* A C expression for a string describing the name of the data type to use for
941 size values. The typedef name `size_t' is defined using the contents of the
944 The string can contain more than one keyword. If so, separate them with
945 spaces, and write first any length keyword, then `unsigned' if appropriate,
946 and finally `int'. The string must exactly match one of the data type names
947 defined in the function `init_decl_processing' in the file `c-decl.c'. You
948 may not omit `int' or change the order--that would cause the compiler to
951 If you don't define this macro, the default is `"long unsigned int"'.
953 Defined in svr4.h. */
954 /* #define SIZE_TYPE */
956 /* A C expression for a string describing the name of the data type to use for
957 the result of subtracting two pointers. The typedef name `ptrdiff_t' is
958 defined using the contents of the string. See `SIZE_TYPE' above for more
961 If you don't define this macro, the default is `"long int"'.
963 Defined in svr4.h. */
964 /* #define PTRDIFF_TYPE */
966 /* A C expression for a string describing the name of the data type to use for
967 wide characters. The typedef name `wchar_t' is defined using the contents
968 of the string. See `SIZE_TYPE' above for more information.
970 If you don't define this macro, the default is `"int"'.
972 Defined in svr4.h. */
973 /* #define WCHAR_TYPE */
975 /* A C expression for the size in bits of the data type for wide characters.
976 This is used in `cpp', which cannot make use of `WCHAR_TYPE'.
978 Defined in svr4.h. */
979 /* #define WCHAR_TYPE_SIZE */
981 /* Maximum number for the size in bits of the data type for wide characters.
982 If this is undefined, the default is `WCHAR_TYPE_SIZE'. Otherwise, it is
983 the constant value that is the largest value that `WCHAR_TYPE_SIZE' can have
984 at run-time. This is used in `cpp'. */
985 /* #define MAX_WCHAR_TYPE_SIZE */
987 /* Define this macro if the type of Objective C selectors should be `int'.
989 If this macro is not defined, then selectors should have the type `struct
991 /* #define OBJC_INT_SELECTORS */
993 /* Define this macro if the compiler can group all the selectors together into
994 a vector and use just one label at the beginning of the vector. Otherwise,
995 the compiler must give each selector its own assembler label.
997 On certain machines, it is important to have a separate label for each
998 selector because this enables the linker to eliminate duplicate selectors. */
999 /* #define OBJC_SELECTORS_WITHOUT_LABELS */
1001 /* A C constant expression for the integer value for escape sequence
1003 #define TARGET_BELL 0x7
1005 /* C constant expressions for the integer values for escape sequences
1006 `\b', `\t' and `\n'. */
1007 #define TARGET_BS 0x8
1008 #define TARGET_TAB 0x9
1009 #define TARGET_NEWLINE 0xa
1011 /* C constant expressions for the integer values for escape sequences
1012 `\v', `\f' and `\r'. */
1013 #define TARGET_VT 0xb
1014 #define TARGET_FF 0xc
1015 #define TARGET_CR 0xd
1018 /* D30V register layout. */
1020 /* Return true if a value is inside a range */
1021 #define IN_RANGE_P(VALUE, LOW, HIGH) \
1022 (((unsigned)((VALUE) - (LOW))) <= ((unsigned)((HIGH) - (LOW))))
1024 /* General purpose registers. */
1025 #define GPR_FIRST 0 /* First gpr */
1026 #define GPR_LAST (GPR_FIRST + 63) /* Last gpr */
1027 #define GPR_R0 GPR_FIRST /* R0, constant 0 */
1028 #define GPR_ARG_FIRST (GPR_FIRST + 2) /* R2, first argument reg */
1029 #define GPR_ARG_LAST (GPR_FIRST + 17) /* R17, last argument reg */
1030 #define GPR_RET_VALUE GPR_ARG_FIRST /* R2, function return reg */
1031 #define GPR_ATMP_FIRST (GPR_FIRST + 20) /* R20, tmp to save accs */
1032 #define GPR_ATMP_LAST (GPR_FIRST + 21) /* R21, tmp to save accs */
1033 #define GPR_STACK_TMP (GPR_FIRST + 22) /* R22, tmp for saving stack */
1034 #define GPR_RES_FIRST (GPR_FIRST + 32) /* R32, first reserved reg */
1035 #define GPR_RES_LAST (GPR_FIRST + 35) /* R35, last reserved reg */
1036 #define GPR_FP (GPR_FIRST + 61) /* Frame pointer */
1037 #define GPR_LINK (GPR_FIRST + 62) /* Return address register */
1038 #define GPR_SP (GPR_FIRST + 63) /* Stack pointer */
1040 /* Argument register that is eliminated in favor of the frame and/or stack
1041 pointer. Also add register to point to where the return address is
1043 #define SPECIAL_REG_FIRST (GPR_LAST + 1)
1044 #define SPECIAL_REG_LAST (SPECIAL_REG_FIRST)
1045 #define ARG_POINTER_REGNUM (SPECIAL_REG_FIRST + 0)
1046 #define SPECIAL_REG_P(R) ((R) == SPECIAL_REG_FIRST)
1048 #define GPR_OR_SPECIAL_REG_P(R) IN_RANGE_P (R, GPR_FIRST, SPECIAL_REG_LAST)
1049 #define GPR_P(R) IN_RANGE_P (R, GPR_FIRST, GPR_LAST)
1050 #define GPR_OR_PSEUDO_P(R) (GPR_OR_SPECIAL_REG_P (R) \
1051 || (R) >= FIRST_PSEUDO_REGISTER)
1054 #define FLAG_FIRST (SPECIAL_REG_LAST + 1) /* First flag */
1055 #define FLAG_LAST (FLAG_FIRST + 7) /* Last flag */
1056 #define FLAG_F0 (FLAG_FIRST) /* F0, used in prediction */
1057 #define FLAG_F1 (FLAG_FIRST + 1) /* F1, used in prediction */
1058 #define FLAG_F2 (FLAG_FIRST + 2) /* F2, general flag */
1059 #define FLAG_F3 (FLAG_FIRST + 3) /* F3, general flag */
1060 #define FLAG_SAT (FLAG_FIRST + 4) /* F4, saturation flag */
1061 #define FLAG_OVERFLOW (FLAG_FIRST + 5) /* F5, overflow flag */
1062 #define FLAG_ACC_OVER (FLAG_FIRST + 6) /* F6, accumulated overflow */
1063 #define FLAG_CARRY (FLAG_FIRST + 7) /* F7, carry/borrow flag */
1064 #define FLAG_BORROW FLAG_CARRY
1066 #define FLAG_P(R) IN_RANGE_P (R, FLAG_FIRST, FLAG_LAST)
1067 #define FLAG_OR_PSEUDO_P(R) (FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1069 #define BR_FLAG_P(R) IN_RANGE_P (R, FLAG_F0, FLAG_F1)
1070 #define BR_FLAG_OR_PSEUDO_P(R) (BR_FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1073 #define ACCUM_FIRST (FLAG_LAST + 1) /* First accumulator */
1074 #define ACCUM_A0 ACCUM_FIRST /* Register A0 */
1075 #define ACCUM_A1 (ACCUM_FIRST + 1) /* Register A1 */
1076 #define ACCUM_LAST (ACCUM_FIRST + 1) /* Last accumulator */
1078 #define ACCUM_P(R) IN_RANGE_P (R, ACCUM_FIRST, ACCUM_LAST)
1079 #define ACCUM_OR_PSEUDO_P(R) (ACCUM_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1081 /* Special registers. Note, we only define the registers that can actually
1083 #define CR_FIRST (ACCUM_LAST + 1) /* First CR */
1084 #define CR_LAST (CR_FIRST + 14) /* Last CR */
1085 #define CR_PSW (CR_FIRST + 0) /* CR0, Program status word */
1086 #define CR_BPSW (CR_FIRST + 1) /* CR1, Backup PSW */
1087 #define CR_PC (CR_FIRST + 2) /* CR2, Program counter */
1088 #define CR_BPC (CR_FIRST + 3) /* CR3, Backup PC */
1089 #define CR_DPSW (CR_FIRST + 4) /* CR4, Debug PSW */
1090 #define CR_DPC (CR_FIRST + 5) /* CR5, Debug PC */
1091 #define CR_RPT_C (CR_FIRST + 6) /* CR7, loop count register */
1092 #define CR_RPT_S (CR_FIRST + 7) /* CR8, loop start address */
1093 #define CR_RPT_E (CR_FIRST + 8) /* CR9, loop end address */
1094 #define CR_MOD_S (CR_FIRST + 9) /* CR10, modulo address start*/
1095 #define CR_MOD_E (CR_FIRST + 10) /* CR11, modulo address */
1096 #define CR_IBA (CR_FIRST + 11) /* CR14, Interrupt break addr */
1097 #define CR_EIT_VB (CR_FIRST + 12) /* CR15, EIT vector address */
1098 #define CR_INT_S (CR_FIRST + 13) /* CR16, Interrupt status */
1099 #define CR_INT_M (CR_FIRST + 14) /* CR17, Interrupt mask */
1101 #define CR_P(R) IN_RANGE_P (R, CR_FIRST, CR_LAST)
1102 #define CR_OR_PSEUDO_P(R) (CR_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1105 /* Register Basics */
1107 /* Number of hardware registers known to the compiler. They receive numbers 0
1108 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
1109 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
1110 #define FIRST_PSEUDO_REGISTER (CR_LAST + 1)
1112 /* An initializer that says which registers are used for fixed purposes all
1113 throughout the compiled code and are therefore not available for general
1114 allocation. These would include the stack pointer, the frame pointer
1115 (except on machines where that can be used as a general register when no
1116 frame pointer is needed), the program counter on machines where that is
1117 considered one of the addressable registers, and any other numbered register
1118 with a standard use.
1120 This information is expressed as a sequence of numbers, separated by commas
1121 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
1124 The table initialized from this macro, and the table initialized by the
1125 following one, may be overridden at run time either automatically, by the
1126 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
1127 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
1128 #define FIXED_REGISTERS \
1130 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R0 - R15 */ \
1131 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
1132 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
1133 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
1135 0, 0, 0, 0, 1, 1, 1, 1, /* F0 - F7 */ \
1136 0, 0, /* A0 - A1 */ \
1137 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
1140 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
1141 general) by function calls as well as for fixed registers. This macro
1142 therefore identifies the registers that are not available for general
1143 allocation of values that must live across function calls.
1145 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
1146 saves it on function entry and restores it on function exit, if the register
1147 is used within the function. */
1148 #define CALL_USED_REGISTERS \
1150 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R0 - R15 */ \
1151 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
1152 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
1153 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
1155 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - F7 */ \
1156 1, 0, /* A0 - A1 */ \
1157 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
1160 /* Zero or more C statements that may conditionally modify two variables
1161 `fixed_regs' and `call_used_regs' (both of type `char []') after they have
1162 been initialized from the two preceding macros.
1164 This is necessary in case the fixed or call-clobbered registers depend on
1167 You need not define this macro if it has no work to do.
1169 If the usage of an entire class of registers depends on the target flags,
1170 you may indicate this to GCC by using this macro to modify `fixed_regs' and
1171 `call_used_regs' to 1 for each of the registers in the classes which should
1172 not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return
1173 `NO_REGS' if it is called with a letter for a class that shouldn't be used.
1175 (However, if this class is not included in `GENERAL_REGS' and all of the
1176 insn patterns whose constraints permit this class are controlled by target
1177 switches, then GCC will automatically avoid using these registers when the
1178 target switches are opposed to them.) */
1179 /* #define CONDITIONAL_REGISTER_USAGE */
1181 /* If this macro is defined and has a nonzero value, it means that `setjmp' and
1182 related functions fail to save the registers, or that `longjmp' fails to
1183 restore them. To compensate, the compiler avoids putting variables in
1184 registers in functions that use `setjmp'. */
1185 /* #define NON_SAVING_SETJMP */
1187 /* Define this macro if the target machine has register windows. This C
1188 expression returns the register number as seen by the called function
1189 corresponding to the register number OUT as seen by the calling function.
1190 Return OUT if register number OUT is not an outbound register. */
1191 /* #define INCOMING_REGNO(OUT) */
1193 /* Define this macro if the target machine has register windows. This C
1194 expression returns the register number as seen by the calling function
1195 corresponding to the register number IN as seen by the called function.
1196 Return IN if register number IN is not an inbound register. */
1197 /* #define OUTGOING_REGNO(IN) */
1200 /* Order of allocation of registers */
1202 /* If defined, an initializer for a vector of integers, containing the numbers
1203 of hard registers in the order in which GNU CC should prefer to use them
1204 (from most preferred to least).
1206 If this macro is not defined, registers are used lowest numbered first (all
1209 One use of this macro is on machines where the highest numbered registers
1210 must always be saved and the save-multiple-registers instruction supports
1211 only sequences of consecutive registers. On such machines, define
1212 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
1213 allocatable register first. */
1215 #define REG_ALLOC_ORDER \
1217 /* volatile registers */ \
1218 GPR_FIRST + 2, GPR_FIRST + 3, GPR_FIRST + 4, GPR_FIRST + 5, \
1219 GPR_FIRST + 6, GPR_FIRST + 7, GPR_FIRST + 8, GPR_FIRST + 9, \
1220 GPR_FIRST + 10, GPR_FIRST + 11, GPR_FIRST + 12, GPR_FIRST + 13, \
1221 GPR_FIRST + 14, GPR_FIRST + 15, GPR_FIRST + 16, GPR_FIRST + 17, \
1222 GPR_FIRST + 18, GPR_FIRST + 19, GPR_FIRST + 20, GPR_FIRST + 21, \
1223 GPR_FIRST + 22, GPR_FIRST + 23, GPR_FIRST + 24, GPR_FIRST + 25, \
1226 /* saved registers */ \
1227 GPR_FIRST + 34, GPR_FIRST + 35, GPR_FIRST + 36, GPR_FIRST + 37, \
1228 GPR_FIRST + 38, GPR_FIRST + 39, GPR_FIRST + 40, GPR_FIRST + 41, \
1229 GPR_FIRST + 42, GPR_FIRST + 43, GPR_FIRST + 44, GPR_FIRST + 45, \
1230 GPR_FIRST + 46, GPR_FIRST + 47, GPR_FIRST + 48, GPR_FIRST + 49, \
1231 GPR_FIRST + 50, GPR_FIRST + 51, GPR_FIRST + 52, GPR_FIRST + 53, \
1232 GPR_FIRST + 54, GPR_FIRST + 55, GPR_FIRST + 56, GPR_FIRST + 57, \
1233 GPR_FIRST + 58, GPR_FIRST + 59, GPR_FIRST + 60, GPR_FIRST + 61, \
1237 FLAG_F2, FLAG_F3, FLAG_F0, FLAG_F1, \
1238 FLAG_SAT, FLAG_OVERFLOW, FLAG_ACC_OVER, FLAG_CARRY, \
1241 ACCUM_FIRST + 0, ACCUM_FIRST + 1, \
1243 /* fixed registers */ \
1244 GPR_FIRST + 0, GPR_FIRST + 26, GPR_FIRST + 27, GPR_FIRST + 28, \
1245 GPR_FIRST + 29, GPR_FIRST + 30, GPR_FIRST + 31, GPR_FIRST + 32, \
1246 GPR_FIRST + 33, GPR_FIRST + 63, \
1247 CR_PSW, CR_BPSW, CR_PC, CR_BPC, \
1248 CR_DPSW, CR_DPC, CR_RPT_C, CR_RPT_S, \
1249 CR_RPT_E, CR_MOD_S, CR_MOD_E, CR_IBA, \
1250 CR_EIT_VB, CR_INT_S, CR_INT_M, \
1251 ARG_POINTER_REGNUM, \
1254 /* A C statement (sans semicolon) to choose the order in which to allocate hard
1255 registers for pseudo-registers local to a basic block.
1257 Store the desired register order in the array `reg_alloc_order'. Element 0
1258 should be the register to allocate first; element 1, the next register; and
1261 The macro body should not assume anything about the contents of
1262 `reg_alloc_order' before execution of the macro.
1264 On most machines, it is not necessary to define this macro. */
1265 /* #define ORDER_REGS_FOR_LOCAL_ALLOC */
1268 /* How Values Fit in Registers */
1270 /* A C expression for the number of consecutive hard registers, starting at
1271 register number REGNO, required to hold a value of mode MODE.
1273 On a machine where all registers are exactly one word, a suitable definition
1276 #define HARD_REGNO_NREGS(REGNO, MODE) \
1277 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1278 / UNITS_PER_WORD)) */
1280 #define HARD_REGNO_NREGS(REGNO, MODE) \
1281 (ACCUM_P (REGNO) ? ((GET_MODE_SIZE (MODE) + 2*UNITS_PER_WORD - 1) \
1282 / (2*UNITS_PER_WORD)) \
1283 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1286 /* A C expression that is nonzero if it is permissible to store a value of mode
1287 MODE in hard register number REGNO (or in several registers starting with
1288 that one). For a machine where all registers are equivalent, a suitable
1291 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
1293 It is not necessary for this macro to check for the numbers of fixed
1294 registers, because the allocation mechanism considers them to be always
1297 On some machines, double-precision values must be kept in even/odd register
1298 pairs. The way to implement that is to define this macro to reject odd
1299 register numbers for such modes.
1301 The minimum requirement for a mode to be OK in a register is that the
1302 `movMODE' instruction pattern support moves between the register and any
1303 other hard register for which the mode is OK; and that moving a value into
1304 the register and back out not alter it.
1306 Since the same instruction used to move `SImode' will work for all narrower
1307 integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK'
1308 to distinguish between these modes, provided you define patterns `movhi',
1309 etc., to take advantage of this. This is useful because of the interaction
1310 between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for
1311 all integer modes to be tieable.
1313 Many machines have special registers for floating point arithmetic. Often
1314 people assume that floating point machine modes are allowed only in floating
1315 point registers. This is not true. Any registers that can hold integers
1316 can safely *hold* a floating point machine mode, whether or not floating
1317 arithmetic can be done on it in those registers. Integer move instructions
1318 can be used to move the values.
1320 On some machines, though, the converse is true: fixed-point machine modes
1321 may not go in floating registers. This is true if the floating registers
1322 normalize any value stored in them, because storing a non-floating value
1323 there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject
1324 fixed-point machine modes in floating registers. But if the floating
1325 registers do not automatically normalize, if you can store any bit pattern
1326 in one and retrieve it unchanged without a trap, then any machine mode may
1327 go in a floating register, so you can define this macro to say so.
1329 The primary significance of special floating registers is rather that they
1330 are the registers acceptable in floating point arithmetic instructions.
1331 However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by
1332 writing the proper constraints for those instructions.
1334 On some machines, the floating registers are especially slow to access, so
1335 that it is better to store a value in a stack frame than in such a register
1336 if floating point arithmetic is not being done. As long as the floating
1337 registers are not in class `GENERAL_REGS', they will not be used unless some
1338 pattern's constraint asks for one. */
1340 extern unsigned char hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
1341 #define HARD_REGNO_MODE_OK(REGNO, MODE) hard_regno_mode_ok[ (int)MODE ][ REGNO ]
1343 /* A C expression that is nonzero if it is desirable to choose register
1344 allocation so as to avoid move instructions between a value of mode MODE1
1345 and a value of mode MODE2.
1347 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
1348 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
1351 extern unsigned char modes_tieable_p[];
1352 #define MODES_TIEABLE_P(MODE1, MODE2) \
1353 modes_tieable_p[ (((int)(MODE1)) * (NUM_MACHINE_MODES)) + (int)(MODE2) ]
1355 /* Define this macro if the compiler should avoid copies to/from CCmode
1356 registers. You should only define this macro if support fo copying to/from
1357 CCmode is incomplete. */
1359 /* On the D30V, copying to/from CCmode is complete, but since there are only
1360 two CC registers usable for conditional tests, this helps gcse not compound
1361 the reload problem. */
1362 #define AVOID_CCMODE_COPIES
1365 /* Handling Leaf Functions */
1367 /* A C initializer for a vector, indexed by hard register number, which
1368 contains 1 for a register that is allowable in a candidate for leaf function
1371 If leaf function treatment involves renumbering the registers, then the
1372 registers marked here should be the ones before renumbering--those that GNU
1373 CC would ordinarily allocate. The registers which will actually be used in
1374 the assembler code, after renumbering, should not be marked with 1 in this
1377 Define this macro only if the target machine offers a way to optimize the
1378 treatment of leaf functions. */
1379 /* #define LEAF_REGISTERS */
1381 /* A C expression whose value is the register number to which REGNO should be
1382 renumbered, when a function is treated as a leaf function.
1384 If REGNO is a register number which should not appear in a leaf function
1385 before renumbering, then the expression should yield -1, which will cause
1386 the compiler to abort.
1388 Define this macro only if the target machine offers a way to optimize the
1389 treatment of leaf functions, and registers need to be renumbered to do this. */
1390 /* #define LEAF_REG_REMAP(REGNO) */
1393 /* Registers That Form a Stack. */
1395 /* Define this if the machine has any stack-like registers. */
1396 /* #define STACK_REGS */
1398 /* The number of the first stack-like register. This one is the top
1400 /* #define FIRST_STACK_REG */
1402 /* The number of the last stack-like register. This one is the
1403 bottom of the stack. */
1404 /* #define LAST_STACK_REG */
1407 /* Register Classes */
1409 /* An enumeral type that must be defined with all the register class names as
1410 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
1411 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
1412 which is not a register class but rather tells how many classes there are.
1414 Each register class has a number, which is the value of casting the class
1415 name to type `int'. The number serves as an index in many of the tables
1434 #define GENERAL_REGS GPR_REGS
1436 /* The number of distinct register classes, defined as follows:
1438 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
1439 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
1441 /* An initializer containing the names of the register classes as C string
1442 constants. These names are used in writing some of the debugging dumps. */
1443 #define REG_CLASS_NAMES \
1449 "OTHER_FLAG_REGS", \
1459 /* Create mask bits for 3rd word of REG_CLASS_CONTENTS */
1460 #define MASK_WORD3(REG) ((long)1 << ((REG) - 64))
1463 #define REPEAT_MASK MASK_WORD3 (CR_RPT_C)
1464 #define CR_MASK (MASK_WORD3 (CR_PSW) | MASK_WORD3 (CR_BPSW) \
1465 | MASK_WORD3 (CR_PC) | MASK_WORD3 (CR_BPC) \
1466 | MASK_WORD3 (CR_DPSW) | MASK_WORD3 (CR_DPC) \
1467 | MASK_WORD3 (CR_RPT_C) | MASK_WORD3 (CR_RPT_S) \
1468 | MASK_WORD3 (CR_RPT_E) | MASK_WORD3 (CR_MOD_S) \
1469 | MASK_WORD3 (CR_MOD_E) | MASK_WORD3 (CR_IBA) \
1470 | MASK_WORD3 (CR_EIT_VB) | MASK_WORD3 (CR_INT_S) \
1471 | MASK_WORD3 (CR_INT_M))
1473 #define ACCUM_MASK (MASK_WORD3 (ACCUM_A0) | MASK_WORD3 (ACCUM_A1))
1474 #define OTHER_FLAG_MASK (MASK_WORD3 (FLAG_F2) | MASK_WORD3 (FLAG_F3) \
1475 | MASK_WORD3 (FLAG_SAT) | MASK_WORD3 (FLAG_OVERFLOW) \
1476 | MASK_WORD3 (FLAG_ACC_OVER) | MASK_WORD3 (FLAG_CARRY))
1478 #define F0_MASK MASK_WORD3 (FLAG_F0)
1479 #define F1_MASK MASK_WORD3 (FLAG_F1)
1480 #define BR_FLAG_MASK (F0_MASK | F1_MASK)
1481 #define FLAG_MASK (BR_FLAG_MASK | OTHER_FLAG_MASK)
1482 #define SPECIAL_MASK MASK_WORD3 (ARG_POINTER_REGNUM)
1484 #define ALL_MASK (CR_MASK | ACCUM_MASK | FLAG_MASK | SPECIAL_MASK)
1486 /* An initializer containing the contents of the register classes, as integers
1487 which are bit masks. The Nth integer specifies the contents of class N.
1488 The way the integer MASK is interpreted is that register R is in the class
1489 if `MASK & (1 << R)' is 1.
1491 When the machine has more than 32 registers, an integer does not suffice.
1492 Then the integers are replaced by sub-initializers, braced groupings
1493 containing several integers. Each sub-initializer must be suitable as an
1494 initializer for the type `HARD_REG_SET' which is defined in
1495 `hard-reg-set.h'. */
1496 #define REG_CLASS_CONTENTS \
1498 { 0x00000000, 0x00000000, NO_MASK }, /* NO_REGS */ \
1499 { 0x00000000, 0x00000000, REPEAT_MASK }, /* REPEAT_REGS */ \
1500 { 0x00000000, 0x00000000, CR_MASK }, /* CR_REGS */ \
1501 { 0x00000000, 0x00000000, ACCUM_MASK }, /* ACCUM_REGS */ \
1502 { 0x00000000, 0x00000000, OTHER_FLAG_MASK }, /* OTHER_FLAG_REGS */ \
1503 { 0x00000000, 0x00000000, F0_MASK }, /* F0_REGS */ \
1504 { 0x00000000, 0x00000000, F1_MASK }, /* F1_REGS */ \
1505 { 0x00000000, 0x00000000, BR_FLAG_MASK }, /* BR_FLAG_REGS */ \
1506 { 0x00000000, 0x00000000, FLAG_MASK }, /* FLAG_REGS */ \
1507 { 0xfffffffc, 0x3fffffff, NO_MASK }, /* EVEN_REGS */ \
1508 { 0xffffffff, 0xffffffff, SPECIAL_MASK }, /* GPR_REGS */ \
1509 { 0xffffffff, 0xffffffff, ALL_MASK }, /* ALL_REGS */ \
1512 /* A C expression whose value is a register class containing hard register
1513 REGNO. In general there is more than one such class; choose a class which
1514 is "minimal", meaning that no smaller class also contains the register. */
1516 extern enum reg_class regno_reg_class[];
1517 #define REGNO_REG_CLASS(REGNO) regno_reg_class[ (REGNO) ]
1519 /* A macro whose definition is the name of the class to which a valid base
1520 register must belong. A base register is one used in an address which is
1521 the register value plus a displacement. */
1522 #define BASE_REG_CLASS GPR_REGS
1524 /* A macro whose definition is the name of the class to which a valid index
1525 register must belong. An index register is one used in an address where its
1526 value is either multiplied by a scale factor or added to another register
1527 (as well as added to a displacement). */
1528 #define INDEX_REG_CLASS GPR_REGS
1530 /* A C expression which defines the machine-dependent operand constraint
1531 letters for register classes. If CHAR is such a letter, the value should be
1532 the register class corresponding to it. Otherwise, the value should be
1533 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
1534 will not be passed to this macro; you do not need to handle it.
1536 The following letters are unavailable, due to being used as
1541 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
1542 'Q', 'R', 'S', 'T', 'U'
1544 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
1546 extern enum reg_class reg_class_from_letter[];
1547 #define REG_CLASS_FROM_LETTER(CHAR) reg_class_from_letter[ CHAR ]
1549 /* A C expression which is nonzero if register number NUM is suitable for use
1550 as a base register in operand addresses. It may be either a suitable hard
1551 register or a pseudo register that has been allocated such a hard register. */
1553 #define REGNO_OK_FOR_BASE_P(NUM) \
1554 ((NUM) < FIRST_PSEUDO_REGISTER \
1556 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
1559 /* A C expression which is nonzero if register number NUM is suitable for use
1560 as an index register in operand addresses. It may be either a suitable hard
1561 register or a pseudo register that has been allocated such a hard register.
1563 The difference between an index register and a base register is that the
1564 index register may be scaled. If an address involves the sum of two
1565 registers, neither one of them scaled, then either one may be labeled the
1566 "base" and the other the "index"; but whichever labeling is used must fit
1567 the machine's constraints of which registers may serve in each capacity.
1568 The compiler will try both labelings, looking for one that is valid, and
1569 will reload one or both registers only if neither labeling works. */
1571 #define REGNO_OK_FOR_INDEX_P(NUM) \
1572 ((NUM) < FIRST_PSEUDO_REGISTER \
1574 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
1576 /* A C expression that places additional restrictions on the register class to
1577 use when it is necessary to copy value X into a register in class CLASS.
1578 The value is a register class; perhaps CLASS, or perhaps another, smaller
1579 class. On many machines, the following definition is safe:
1581 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
1583 Sometimes returning a more restrictive class makes better code. For
1584 example, on the 68000, when X is an integer constant that is in range for a
1585 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
1586 as CLASS includes the data registers. Requiring a data register guarantees
1587 that a `moveq' will be used.
1589 If X is a `const_double', by returning `NO_REGS' you can force X into a
1590 memory constant. This is useful on certain machines where immediate
1591 floating values cannot be loaded into certain kinds of registers. */
1592 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
1594 /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input
1595 reloads. If you don't define this macro, the default is to use CLASS,
1597 /* #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) */
1599 /* A C expression that places additional restrictions on the register class to
1600 use when it is necessary to be able to hold a value of mode MODE in a reload
1601 register for which class CLASS would ordinarily be used.
1603 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are
1604 certain modes that simply can't go in certain reload classes.
1606 The value is a register class; perhaps CLASS, or perhaps another, smaller
1609 Don't define this macro unless the target machine has limitations which
1610 require the macro to do something nontrivial. */
1611 /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */
1613 /* Many machines have some registers that cannot be copied directly to or from
1614 memory or even from other types of registers. An example is the `MQ'
1615 register, which on most machines, can only be copied to or from general
1616 registers, but not memory. Some machines allow copying all registers to and
1617 from memory, but require a scratch register for stores to some memory
1618 locations (e.g., those with symbolic address on the RT, and those with
1619 certain symbolic address on the Sparc when compiling PIC). In some cases,
1620 both an intermediate and a scratch register are required.
1622 You should define these macros to indicate to the reload phase that it may
1623 need to allocate at least one register for a reload in addition to the
1624 register to contain the data. Specifically, if copying X to a register
1625 CLASS in MODE requires an intermediate register, you should define
1626 `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of
1627 whose registers can be used as intermediate registers or scratch registers.
1629 If copying a register CLASS in MODE to X requires an intermediate or scratch
1630 register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the
1631 largest register class required. If the requirements for input and output
1632 reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used
1633 instead of defining both macros identically.
1635 The values returned by these macros are often `GENERAL_REGS'. Return
1636 `NO_REGS' if no spare register is needed; i.e., if X can be directly copied
1637 to or from a register of CLASS in MODE without requiring a scratch register.
1638 Do not define this macro if it would always return `NO_REGS'.
1640 If a scratch register is required (either with or without an intermediate
1641 register), you should define patterns for `reload_inM' or `reload_outM', as
1642 required (*note Standard Names::.. These patterns, which will normally be
1643 implemented with a `define_expand', should be similar to the `movM'
1644 patterns, except that operand 2 is the scratch register.
1646 Define constraints for the reload register and scratch register that contain
1647 a single register class. If the original reload register (whose class is
1648 CLASS) can meet the constraint given in the pattern, the value returned by
1649 these macros is used for the class of the scratch register. Otherwise, two
1650 additional reload registers are required. Their classes are obtained from
1651 the constraints in the insn pattern.
1653 X might be a pseudo-register or a `subreg' of a pseudo-register, which could
1654 either be in a hard register or in memory. Use `true_regnum' to find out;
1655 it will return -1 if the pseudo is in memory and the hard register number if
1656 it is in a register.
1658 These macros should not be used in the case where a particular class of
1659 registers can only be copied to memory and not to another class of
1660 registers. In that case, secondary reload registers are not needed and
1661 would not be helpful. Instead, a stack location must be used to perform the
1662 copy and the `movM' pattern should use memory as a intermediate storage.
1663 This case often occurs between floating-point and general registers. */
1665 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
1666 ((CLASS) == GPR_REGS ? NO_REGS \
1667 : (CLASS) == EVEN_REGS ? NO_REGS \
1668 : (CLASS) == ACCUM_REGS ? EVEN_REGS \
1671 /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */
1672 /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */
1674 /* Certain machines have the property that some registers cannot be copied to
1675 some other registers without using memory. Define this macro on those
1676 machines to be a C expression that is non-zero if objects of mode M in
1677 registers of CLASS1 can only be copied to registers of class CLASS2 by
1678 storing a register of CLASS1 into memory and loading that memory location
1679 into a register of CLASS2.
1681 Do not define this macro if its value would always be zero. */
1682 /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */
1684 /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a
1685 stack slot for a memory location needed for register copies. If this macro
1686 is defined, the compiler instead uses the memory location defined by this
1689 Do not define this macro if you do not define
1690 `SECONDARY_MEMORY_NEEDED'. */
1691 /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */
1693 /* When the compiler needs a secondary memory location to copy between two
1694 registers of mode MODE, it normally allocates sufficient memory to hold a
1695 quantity of `BITS_PER_WORD' bits and performs the store and load operations
1696 in a mode that many bits wide and whose class is the same as that of MODE.
1698 This is right thing to do on most machines because it ensures that all bits
1699 of the register are copied and prevents accesses to the registers in a
1700 narrower mode, which some machines prohibit for floating-point registers.
1702 However, this default behavior is not correct on some machines, such as the
1703 DEC Alpha, that store short integers in floating-point registers differently
1704 than in integer registers. On those machines, the default widening will not
1705 work correctly and you must define this macro to suppress that widening in
1706 some cases. See the file `alpha.h' for details.
1708 Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or
1709 if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for
1711 /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */
1713 /* Normally the compiler avoids choosing registers that have been explicitly
1714 mentioned in the rtl as spill registers (these registers are normally those
1715 used to pass parameters and return values). However, some machines have so
1716 few registers of certain classes that there would not be enough registers to
1717 use as spill registers if this were done.
1719 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero value on
1720 these machines. When this macro has a non-zero value, the compiler allows
1721 registers explicitly used in the rtl to be used as spill registers but
1722 avoids extending the lifetime of these registers.
1724 It is always safe to define this macro with a non-zero value, but if you
1725 unnecessarily define it, you will reduce the amount of optimizations that
1726 can be performed in some cases. If you do not define this macro with a
1727 non-zero value when it is required, the compiler will run out of spill
1728 registers and print a fatal error message. For most machines, you should
1729 not define this macro at all. */
1730 /* #define SMALL_REGISTER_CLASSES */
1732 /* A C expression whose value is nonzero if pseudos that have been assigned to
1733 registers of class CLASS would likely be spilled because registers of CLASS
1734 are needed for spill registers.
1736 The default value of this macro returns 1 if CLASS has exactly one register
1737 and zero otherwise. On most machines, this default should be used. Only
1738 define this macro to some other expression if pseudo allocated by
1739 `local-alloc.c' end up in memory because their hard registers were needed
1740 for spill registers. If this macro returns nonzero for those classes, those
1741 pseudos will only be allocated by `global.c', which knows how to reallocate
1742 the pseudo to another register. If there would not be another register
1743 available for reallocation, you should not change the definition of this
1744 macro since the only effect of such a definition would be to slow down
1745 register allocation. */
1746 #define CLASS_LIKELY_SPILLED_P(CLASS) \
1747 ((CLASS) != GPR_REGS && (CLASS) != EVEN_REGS)
1749 /* A C expression for the maximum number of consecutive registers of
1750 class CLASS needed to hold a value of mode MODE.
1752 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
1753 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
1754 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
1756 This macro helps control the handling of multiple-word values in
1759 #define CLASS_MAX_NREGS(CLASS, MODE) \
1760 (((CLASS) == ACCUM_REGS) \
1761 ? ((GET_MODE_SIZE (MODE) + 8 - 1) / 8) \
1762 : ((GET_MODE_SIZE (MODE) + 4 - 1) / 4))
1764 /* A C expression that defines the machine-dependent operand constraint letters
1765 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
1766 If C is one of those letters, the expression should check that VALUE, an
1767 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
1768 is not one of those letters, the value should be 0 regardless of VALUE. */
1769 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1770 ((C) == 'I' ? IN_RANGE_P (VALUE, -32, 31) \
1771 : (C) == 'J' ? IN_RANGE_P (VALUE, 0, 31) \
1772 : (C) == 'K' ? IN_RANGE_P (exact_log2 (VALUE), 0, 31) \
1773 : (C) == 'L' ? IN_RANGE_P (exact_log2 (~ (VALUE)), 0, 31) \
1774 : (C) == 'M' ? ((VALUE) == 32) \
1775 : (C) == 'N' ? ((VALUE) == 1) \
1776 : (C) == 'O' ? ((VALUE) == 0) \
1777 : (C) == 'P' ? IN_RANGE_P (VALUE, 32, 63) \
1780 /* A C expression that defines the machine-dependent operand constraint letters
1781 (`G', `H') that specify particular ranges of `const_double' values.
1783 If C is one of those letters, the expression should check that VALUE, an RTX
1784 of code `const_double', is in the appropriate range and return 1 if so, 0
1785 otherwise. If C is not one of those letters, the value should be 0
1786 regardless of VALUE.
1788 `const_double' is used for all floating-point constants and for `DImode'
1789 fixed-point constants. A given letter can accept either or both kinds of
1790 values. It can use `GET_MODE' to distinguish between these kinds. */
1791 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
1792 ((C) == 'G' ? (CONST_DOUBLE_LOW (VALUE) == 0 \
1793 && CONST_DOUBLE_HIGH (VALUE) == 0) \
1794 : (C) == 'H' ? FALSE \
1797 /* A C expression that defines the optional machine-dependent constraint
1798 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
1799 types of operands, usually memory references, for the target machine.
1800 Normally this macro will not be defined. If it is required for a particular
1801 target machine, it should return 1 if VALUE corresponds to the operand type
1802 represented by the constraint letter C. If C is not defined as an extra
1803 constraint, the value returned should be 0 regardless of VALUE.
1805 For example, on the ROMP, load instructions cannot have their output in r0
1806 if the memory reference contains a symbolic address. Constraint letter `Q'
1807 is defined as representing a memory address that does *not* contain a
1808 symbolic address. An alternative is specified with a `Q' constraint on the
1809 input and `r' on the output. The next alternative specifies `m' on the
1810 input and a register class that does not include r0 on the output. */
1812 #define EXTRA_CONSTRAINT(VALUE, C) \
1813 (((C) == 'Q') ? short_memory_operand ((VALUE), GET_MODE (VALUE)) \
1814 : ((C) == 'R') ? single_reg_memory_operand ((VALUE), GET_MODE (VALUE)) \
1815 : ((C) == 'S') ? const_addr_memory_operand ((VALUE), GET_MODE (VALUE)) \
1816 : ((C) == 'T') ? long_memory_operand ((VALUE), GET_MODE (VALUE)) \
1817 : ((C) == 'U') ? FALSE \
1821 /* Basic Stack Layout */
1825 /* Structure used to define the d30v stack */
1826 typedef struct d30v_stack {
1827 int varargs_p; /* whether this is a varargs function */
1828 int varargs_size; /* size to hold varargs args passed in regs */
1829 int vars_size; /* variable save area size */
1830 int parm_size; /* outgoing parameter size */
1831 int gpr_size; /* size of saved GPR registers */
1832 int accum_size; /* size of saved ACCUM registers */
1833 int total_size; /* total bytes allocated for stack */
1834 /* which registers are to be saved */
1835 int save_offset; /* offset from new sp to start saving vars at */
1836 int link_offset; /* offset r62 is saved at */
1837 int memrefs_varargs; /* # of 2 word memory references for varargs */
1838 int memrefs_2words; /* # of 2 word memory references */
1839 int memrefs_1word; /* # of 1 word memory references */
1840 /* 1 for ldw/stw ops; 2 for ld2w/st2w ops */
1841 unsigned char save_p[FIRST_PSEUDO_REGISTER];
1844 /* Define this macro if pushing a word onto the stack moves the stack pointer
1845 to a smaller address.
1847 When we say, "define this macro if ...," it means that the compiler checks
1848 this macro only with `#ifdef' so the precise definition used does not
1850 #define STACK_GROWS_DOWNWARD 1
1852 /* Define this macro if the addresses of local variable slots are at negative
1853 offsets from the frame pointer. */
1854 /* #define FRAME_GROWS_DOWNWARD */
1856 /* Define this macro if successive arguments to a function occupy decreasing
1857 addresses on the stack. */
1858 /* #define ARGS_GROW_DOWNWARD */
1860 /* Offset from the frame pointer to the first local variable slot to be
1863 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the
1864 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by
1865 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */
1867 #define STARTING_FRAME_OFFSET \
1868 (D30V_ALIGN (current_function_outgoing_args_size, \
1869 (STACK_BOUNDARY / BITS_PER_UNIT)))
1871 /* Offset from the stack pointer register to the first location at which
1872 outgoing arguments are placed. If not specified, the default value of zero
1873 is used. This is the proper value for most machines.
1875 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1876 location at which outgoing arguments are placed. */
1877 /* #define STACK_POINTER_OFFSET */
1879 /* Offset from the argument pointer register to the first argument's address.
1880 On some machines it may depend on the data type of the function.
1882 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1883 argument's address. */
1884 #define FIRST_PARM_OFFSET(FUNDECL) 0
1886 /* Offset from the stack pointer register to an item dynamically allocated on
1887 the stack, e.g., by `alloca'.
1889 The default value for this macro is `STACK_POINTER_OFFSET' plus the length
1890 of the outgoing arguments. The default is correct for most machines. See
1891 `function.c' for details. */
1892 /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */
1894 /* A C expression whose value is RTL representing the address in a stack frame
1895 where the pointer to the caller's frame is stored. Assume that FRAMEADDR is
1896 an RTL expression for the address of the stack frame itself.
1898 If you don't define this macro, the default is to return the value of
1899 FRAMEADDR--that is, the stack frame address is also the address of the stack
1900 word that points to the previous frame. */
1901 /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */
1903 /* If defined, a C expression that produces the machine-specific code to setup
1904 the stack so that arbitrary frames can be accessed. For example, on the
1905 Sparc, we must flush all of the register windows to the stack before we can
1906 access arbitrary stack frames. This macro will seldom need to be defined. */
1907 /* #define SETUP_FRAME_ADDRESSES() */
1909 /* A C expression whose value is RTL representing the value of the return
1910 address for the frame COUNT steps up from the current frame, after the
1911 prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame
1912 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is
1915 The value of the expression must always be the correct address when COUNT is
1916 zero, but may be `NULL_RTX' if there is not way to determine the return
1917 address of other frames. */
1919 /* ??? This definition fails for leaf functions. There is currently no
1920 general solution for this problem. */
1922 /* ??? There appears to be no way to get the return address of any previous
1923 frame except by disassembling instructions in the prologue/epilogue.
1924 So currently we support only the current frame. */
1926 #define RETURN_ADDR_RTX(COUNT, FRAME) \
1927 ((COUNT) == 0 ? d30v_return_addr() : const0_rtx)
1929 /* Define this if the return address of a particular stack frame is
1930 accessed from the frame pointer of the previous stack frame. */
1931 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1933 /* A C expression whose value is RTL representing the location of the incoming
1934 return address at the beginning of any function, before the prologue. This
1935 RTL is either a `REG', indicating that the return value is saved in `REG',
1936 or a `MEM' representing a location in the stack.
1938 You only need to define this macro if you want to support call frame
1939 debugging information like that provided by DWARF 2. */
1941 /* Before the prologue, RA lives in r62. */
1942 #define INCOMING_RETURN_ADDR_RTX gen_rtx (REG, Pmode, GPR_LINK)
1944 /* A C expression whose value is an integer giving the offset, in bytes, from
1945 the value of the stack pointer register to the top of the stack frame at the
1946 beginning of any function, before the prologue. The top of the frame is
1947 defined to be the value of the stack pointer in the previous frame, just
1948 before the call instruction.
1950 You only need to define this macro if you want to support call frame
1951 debugging information like that provided by DWARF 2. */
1952 #define INCOMING_FRAME_SP_OFFSET 0
1954 /* Initialize data used by insn expanders. This is called from insn_emit,
1955 once for every function before code is generated. */
1957 #define INIT_EXPANDERS d30v_init_expanders ()
1960 /* Stack Checking. */
1962 /* A nonzero value if stack checking is done by the configuration files in a
1963 machine-dependent manner. You should define this macro if stack checking is
1964 require by the ABI of your machine or if you would like to have to stack
1965 checking in some more efficient way than GNU CC's portable approach. The
1966 default value of this macro is zero. */
1967 /* #define STACK_CHECK_BUILTIN */
1969 /* An integer representing the interval at which GNU CC must generate stack
1970 probe instructions. You will normally define this macro to be no larger
1971 than the size of the "guard pages" at the end of a stack area. The default
1972 value of 4096 is suitable for most systems. */
1973 /* #define STACK_CHECK_PROBE_INTERVAL */
1975 /* A integer which is nonzero if GNU CC should perform the stack probe as a
1976 load instruction and zero if GNU CC should use a store instruction. The
1977 default is zero, which is the most efficient choice on most systems. */
1978 /* #define STACK_CHECK_PROBE_LOAD */
1980 /* The number of bytes of stack needed to recover from a stack overflow, for
1981 languages where such a recovery is supported. The default value of 75 words
1982 should be adequate for most machines. */
1983 /* #define STACK_CHECK_PROTECT */
1985 /* The maximum size of a stack frame, in bytes. GNU CC will generate probe
1986 instructions in non-leaf functions to ensure at least this many bytes of
1987 stack are available. If a stack frame is larger than this size, stack
1988 checking will not be reliable and GNU CC will issue a warning. The default
1989 is chosen so that GNU CC only generates one instruction on most systems.
1990 You should normally not change the default value of this macro. */
1991 /* #define STACK_CHECK_MAX_FRAME_SIZE */
1993 /* GNU CC uses this value to generate the above warning message. It represents
1994 the amount of fixed frame used by a function, not including space for any
1995 callee-saved registers, temporaries and user variables. You need only
1996 specify an upper bound for this amount and will normally use the default of
1998 /* #define STACK_CHECK_FIXED_FRAME_SIZE */
2000 /* The maximum size, in bytes, of an object that GNU CC will place in the fixed
2001 area of the stack frame when the user specifies `-fstack-check'. GNU CC
2002 computed the default from the values of the above macros and you will
2003 normally not need to override that default. */
2004 /* #define STACK_CHECK_MAX_VAR_SIZE */
2007 /* Register That Address the Stack Frame. */
2009 /* The register number of the stack pointer register, which must also be a
2010 fixed register according to `FIXED_REGISTERS'. On most machines, the
2011 hardware determines which register this is. */
2012 #define STACK_POINTER_REGNUM GPR_SP
2014 /* The register number of the frame pointer register, which is used to access
2015 automatic variables in the stack frame. On some machines, the hardware
2016 determines which register this is. On other machines, you can choose any
2017 register you wish for this purpose. */
2018 #define FRAME_POINTER_REGNUM GPR_FP
2020 /* On some machines the offset between the frame pointer and starting offset of
2021 the automatic variables is not known until after register allocation has
2022 been done (for example, because the saved registers are between these two
2023 locations). On those machines, define `FRAME_POINTER_REGNUM' the number of
2024 a special, fixed register to be used internally until the offset is known,
2025 and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
2026 used for the frame pointer.
2028 You should define this macro only in the very rare circumstances when it is
2029 not possible to calculate the offset between the frame pointer and the
2030 automatic variables until after register allocation has been completed.
2031 When this macro is defined, you must also indicate in your definition of
2032 `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either
2033 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
2035 Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */
2036 /* #define HARD_FRAME_POINTER_REGNUM */
2038 /* The register number of the arg pointer register, which is used to access the
2039 function's argument list. On some machines, this is the same as the frame
2040 pointer register. On some machines, the hardware determines which register
2041 this is. On other machines, you can choose any register you wish for this
2042 purpose. If this is not the same register as the frame pointer register,
2043 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
2044 arrange to be able to eliminate it (*note Elimination::.). */
2045 /* #define ARG_POINTER_REGNUM */
2047 /* The register number of the return address pointer register, which is used to
2048 access the current function's return address from the stack. On some
2049 machines, the return address is not at a fixed offset from the frame pointer
2050 or stack pointer or argument pointer. This register can be defined to point
2051 to the return address on the stack, and then be converted by
2052 `ELIMINABLE_REGS' into either the frame pointer or stack pointer.
2054 Do not define this macro unless there is no other way to get the return
2055 address from the stack. */
2056 /* #define RETURN_ADDRESS_POINTER_REGNUM */
2058 /* Register numbers used for passing a function's static chain pointer. If
2059 register windows are used, the register number as seen by the called
2060 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
2061 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
2062 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
2064 The static chain register need not be a fixed register.
2066 If the static chain is passed in memory, these macros should not be defined;
2067 instead, the next two macros should be defined. */
2069 #define STATIC_CHAIN_REGNUM (GPR_FIRST + 18)
2070 /* #define STATIC_CHAIN_INCOMING_REGNUM */
2072 /* If the static chain is passed in memory, these macros provide rtx giving
2073 `mem' expressions that denote where they are stored. `STATIC_CHAIN' and
2074 `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called
2075 functions, respectively. Often the former will be at an offset from the
2076 stack pointer and the latter at an offset from the frame pointer.
2078 The variables `stack_pointer_rtx', `frame_pointer_rtx', and
2079 `arg_pointer_rtx' will have been initialized prior to the use of these
2080 macros and should be used to refer to those items.
2082 If the static chain is passed in a register, the two previous
2083 macros should be defined instead. */
2084 /* #define STATIC_CHAIN */
2085 /* #define STATIC_CHAIN_INCOMING */
2088 /* Eliminating the Frame Pointer and the Arg Pointer */
2090 /* A C expression which is nonzero if a function must have and use a frame
2091 pointer. This expression is evaluated in the reload pass. If its value is
2092 nonzero the function will have a frame pointer.
2094 The expression can in principle examine the current function and decide
2095 according to the facts, but on most machines the constant 0 or the constant
2096 1 suffices. Use 0 when the machine allows code to be generated with no
2097 frame pointer, and doing so saves some time or space. Use 1 when there is
2098 no possible advantage to avoiding a frame pointer.
2100 In certain cases, the compiler does not know how to produce valid code
2101 without a frame pointer. The compiler recognizes those cases and
2102 automatically gives the function a frame pointer regardless of what
2103 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
2105 In a function that does not require a frame pointer, the frame pointer
2106 register can be allocated for ordinary usage, unless you mark it as a fixed
2107 register. See `FIXED_REGISTERS' for more information. */
2108 #define FRAME_POINTER_REQUIRED 0
2110 /* A C statement to store in the variable DEPTH-VAR the difference between the
2111 frame pointer and the stack pointer values immediately after the function
2112 prologue. The value would be computed from information such as the result
2113 of `get_frame_size ()' and the tables of registers `regs_ever_live' and
2116 If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not
2117 be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED'
2118 is defined to always be true; in that case, you may set DEPTH-VAR to
2120 /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */
2122 /* If defined, this macro specifies a table of register pairs used to eliminate
2123 unneeded registers that point into the stack frame. If it is not defined,
2124 the only elimination attempted by the compiler is to replace references to
2125 the frame pointer with references to the stack pointer.
2127 The definition of this macro is a list of structure initializations, each of
2128 which specifies an original and replacement register.
2130 On some machines, the position of the argument pointer is not known until
2131 the compilation is completed. In such a case, a separate hard register must
2132 be used for the argument pointer. This register can be eliminated by
2133 replacing it with either the frame pointer or the argument pointer,
2134 depending on whether or not the frame pointer has been eliminated.
2136 In this case, you might specify:
2137 #define ELIMINABLE_REGS \
2138 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2139 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
2140 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
2142 Note that the elimination of the argument pointer with the stack pointer is
2143 specified first since that is the preferred elimination. */
2144 #define ELIMINABLE_REGS \
2146 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
2147 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }, \
2148 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM } \
2151 /* A C expression that returns non-zero if the compiler is allowed to try to
2152 replace register number FROM-REG with register number TO-REG. This macro
2153 need only be defined if `ELIMINABLE_REGS' is defined, and will usually be
2154 the constant 1, since most of the cases preventing register elimination are
2155 things that the compiler already knows about. */
2157 #define CAN_ELIMINATE(FROM, TO) \
2158 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
2159 ? ! frame_pointer_needed \
2162 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
2163 initial difference between the specified pair of registers. This macro must
2164 be defined if `ELIMINABLE_REGS' is defined. */
2166 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
2168 d30v_stack_t *info = d30v_stack_info (); \
2170 if ((FROM) == FRAME_POINTER_REGNUM) \
2172 else if ((FROM) == ARG_POINTER_REGNUM) \
2173 (OFFSET) = info->total_size - current_function_pretend_args_size; \
2178 /* Define this macro if the `longjmp' function restores registers from the
2179 stack frames, rather than from those saved specifically by `setjmp'.
2180 Certain quantities must not be kept in registers across a call to `setjmp'
2181 on such machines. */
2182 /* #define LONGJMP_RESTORE_FROM_STACK */
2185 /* Passing Function Arguments on the Stack */
2187 /* Define this macro if an argument declared in a prototype as an integral type
2188 smaller than `int' should actually be passed as an `int'. In addition to
2189 avoiding errors in certain cases of mismatch, it also makes for better code
2190 on certain machines. */
2191 /* #define PROMOTE_PROTOTYPES */
2193 /* A C expression that is the number of bytes actually pushed onto the stack
2194 when an instruction attempts to push NPUSHED bytes.
2196 If the target machine does not have a push instruction, do not define this
2197 macro. That directs GNU CC to use an alternate strategy: to allocate the
2198 entire argument block and then store the arguments into it.
2200 On some machines, the definition
2202 #define PUSH_ROUNDING(BYTES) (BYTES)
2204 will suffice. But on other machines, instructions that appear to push one
2205 byte actually push two bytes in an attempt to maintain alignment. Then the
2206 definition should be
2208 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
2209 /* #define PUSH_ROUNDING(NPUSHED) */
2211 /* If defined, the maximum amount of space required for outgoing arguments will
2212 be computed and placed into the variable
2213 `current_function_outgoing_args_size'. No space will be pushed onto the
2214 stack for each call; instead, the function prologue should increase the
2215 stack frame size by this amount.
2217 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
2219 #define ACCUMULATE_OUTGOING_ARGS 1
2221 /* Define this macro if functions should assume that stack space has been
2222 allocated for arguments even when their values are passed in registers.
2224 The value of this macro is the size, in bytes, of the area reserved for
2225 arguments passed in registers for the function represented by FNDECL.
2227 This space can be allocated by the caller, or be a part of the
2228 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
2230 /* #define REG_PARM_STACK_SPACE(FNDECL) */
2232 /* Define these macros in addition to the one above if functions might allocate
2233 stack space for arguments even when their values are passed in registers.
2234 These should be used when the stack space allocated for arguments in
2235 registers is not a simple constant independent of the function declaration.
2237 The value of the first macro is the size, in bytes, of the area that we
2238 should initially assume would be reserved for arguments passed in registers.
2240 The value of the second macro is the actual size, in bytes, of the area that
2241 will be reserved for arguments passed in registers. This takes two
2242 arguments: an integer representing the number of bytes of fixed sized
2243 arguments on the stack, and a tree representing the number of bytes of
2244 variable sized arguments on the stack.
2246 When these macros are defined, `REG_PARM_STACK_SPACE' will only be called
2247 for libcall functions, the current function, or for a function being called
2248 when it is known that such stack space must be allocated. In each case this
2249 value can be easily computed.
2251 When deciding whether a called function needs such stack space, and how much
2252 space to reserve, GNU CC uses these two macros instead of
2253 `REG_PARM_STACK_SPACE'. */
2254 /* #define MAYBE_REG_PARM_STACK_SPACE */
2255 /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */
2257 /* Define this if it is the responsibility of the caller to allocate the area
2258 reserved for arguments passed in registers.
2260 If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the
2261 space for these arguments counts in the value of
2262 `current_function_outgoing_args_size'. */
2263 /* #define OUTGOING_REG_PARM_STACK_SPACE */
2265 /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack
2266 parameters don't skip the area specified by it.
2268 Normally, when a parameter is not passed in registers, it is placed on the
2269 stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro
2270 suppresses this behavior and causes the parameter to be passed on the stack
2271 in its natural location. */
2272 /* #define STACK_PARMS_IN_REG_PARM_AREA */
2274 /* A C expression that should indicate the number of bytes of its own arguments
2275 that a function pops on returning, or 0 if the function pops no arguments
2276 and the caller must therefore pop them all after the function returns.
2278 FUNDECL is a C variable whose value is a tree node that describes the
2279 function in question. Normally it is a node of type `FUNCTION_DECL' that
2280 describes the declaration of the function. From this it is possible to
2281 obtain the DECL_MACHINE_ATTRIBUTES of the function.
2283 FUNTYPE is a C variable whose value is a tree node that describes the
2284 function in question. Normally it is a node of type `FUNCTION_TYPE' that
2285 describes the data type of the function. From this it is possible to obtain
2286 the data types of the value and arguments (if known).
2288 When a call to a library function is being considered, FUNTYPE will contain
2289 an identifier node for the library function. Thus, if you need to
2290 distinguish among various library functions, you can do so by their names.
2291 Note that "library function" in this context means a function used to
2292 perform arithmetic, whose name is known specially in the compiler and was
2293 not mentioned in the C code being compiled.
2295 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
2296 variable number of bytes is passed, it is zero, and argument popping will
2297 always be the responsibility of the calling function.
2299 On the Vax, all functions always pop their arguments, so the definition of
2300 this macro is STACK-SIZE. On the 68000, using the standard calling
2301 convention, no functions pop their arguments, so the value of the macro is
2302 always 0 in this case. But an alternative calling convention is available
2303 in which functions that take a fixed number of arguments pop them but other
2304 functions (such as `printf') pop nothing (the caller pops all). When this
2305 convention is in use, FUNTYPE is examined to determine whether a function
2306 takes a fixed number of arguments. */
2307 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
2310 /* Function Arguments in Registers */
2312 /* A C expression that controls whether a function argument is passed in a
2313 register, and which register.
2315 The arguments are CUM, which summarizes all the previous arguments; MODE,
2316 the machine mode of the argument; TYPE, the data type of the argument as a
2317 tree node or 0 if that is not known (which happens for C support library
2318 functions); and NAMED, which is 1 for an ordinary argument and 0 for
2319 nameless arguments that correspond to `...' in the called function's
2322 The value of the expression should either be a `reg' RTX for the hard
2323 register in which to pass the argument, or zero to pass the argument on the
2326 For machines like the Vax and 68000, where normally all arguments are
2327 pushed, zero suffices as a definition.
2329 The usual way to make the ANSI library `stdarg.h' work on a machine where
2330 some arguments are usually passed in registers, is to cause nameless
2331 arguments to be passed on the stack instead. This is done by making
2332 `FUNCTION_ARG' return 0 whenever NAMED is 0.
2334 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
2335 this macro to determine if this argument is of a type that must be passed in
2336 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
2337 returns non-zero for such an argument, the compiler will abort. If
2338 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
2339 stack and then loaded into a register. */
2341 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
2342 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, FALSE)
2344 /* Define this macro if the target machine has "register windows", so that the
2345 register in which a function sees an arguments is not necessarily the same
2346 as the one in which the caller passed the argument.
2348 For such machines, `FUNCTION_ARG' computes the register in which the caller
2349 passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar
2350 fashion to tell the function being called where the arguments will arrive.
2352 If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both
2355 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
2356 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, TRUE)
2358 /* A C expression for the number of words, at the beginning of an argument,
2359 must be put in registers. The value must be zero for arguments that are
2360 passed entirely in registers or that are entirely pushed on the stack.
2362 On some machines, certain arguments must be passed partially in registers
2363 and partially in memory. On these machines, typically the first N words of
2364 arguments are passed in registers, and the rest on the stack. If a
2365 multi-word argument (a `double' or a structure) crosses that boundary, its
2366 first few words must be passed in registers and the rest must be pushed.
2367 This macro tells the compiler when this occurs, and how many of the words
2368 should go in registers.
2370 `FUNCTION_ARG' for these arguments should return the first register to be
2371 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
2372 the called function. */
2373 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
2374 d30v_function_arg_partial_nregs (&CUM, (int)MODE, TYPE, NAMED)
2376 /* A C expression that indicates when an argument must be passed by reference.
2377 If nonzero for an argument, a copy of that argument is made in memory and a
2378 pointer to the argument is passed instead of the argument itself. The
2379 pointer is passed in whatever way is appropriate for passing a pointer to
2382 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
2383 definition of this macro might be
2384 #define FUNCTION_ARG_PASS_BY_REFERENCE\
2385 (CUM, MODE, TYPE, NAMED) \
2386 MUST_PASS_IN_STACK (MODE, TYPE) */
2387 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0
2389 /* If defined, a C expression that indicates when it is the called function's
2390 responsibility to make a copy of arguments passed by invisible reference.
2391 Normally, the caller makes a copy and passes the address of the copy to the
2392 routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is
2393 nonzero, the caller does not make a copy. Instead, it passes a pointer to
2394 the "live" value. The called function must not modify this value. If it
2395 can be determined that the value won't be modified, it need not make a copy;
2396 otherwise a copy must be made. */
2397 /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */
2399 /* A C type for declaring a variable that is used as the first argument of
2400 `FUNCTION_ARG' and other related values. For some target machines, the type
2401 `int' suffices and can hold the number of bytes of argument so far.
2403 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
2404 that have been passed on the stack. The compiler has other variables to
2405 keep track of that. For target machines on which all arguments are passed
2406 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
2407 however, the data structure must exist and should not be empty, so use
2409 typedef int CUMULATIVE_ARGS;
2411 /* A C statement (sans semicolon) for initializing the variable CUM for the
2412 state at the beginning of the argument list. The variable has type
2413 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
2414 of the function which will receive the args, or 0 if the args are to a
2415 compiler support library function. The value of INDIRECT is nonzero when
2416 processing an indirect call, for example a call through a function pointer.
2417 The value of INDIRECT is zero for a call to an explicitly named function, a
2418 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
2419 arguments for the function being compiled.
2421 When processing a call to a compiler support library function, LIBNAME
2422 identifies which one. It is a `symbol_ref' rtx which contains the name of
2423 the function, as a string. LIBNAME is 0 when an ordinary C function call is
2424 being processed. Thus, each time this macro is called, either LIBNAME or
2425 FNTYPE is nonzero, but never both of them at once. */
2427 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
2428 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, INDIRECT, FALSE)
2430 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
2431 arguments for the function being compiled. If this macro is undefined,
2432 `INIT_CUMULATIVE_ARGS' is used instead.
2434 The value passed for LIBNAME is always 0, since library routines with
2435 special calling conventions are never compiled with GNU CC. The argument
2436 LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */
2438 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
2439 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, FALSE, TRUE)
2441 /* A C statement (sans semicolon) to update the summarizer variable CUM to
2442 advance past an argument in the argument list. The values MODE, TYPE and
2443 NAMED describe that argument. Once this is done, the variable CUM is
2444 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
2446 This macro need not do anything if the argument in question was passed on
2447 the stack. The compiler knows how to track the amount of stack space used
2448 for arguments without any special help. */
2450 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
2451 d30v_function_arg_advance (&CUM, (int) MODE, TYPE, NAMED)
2453 /* If defined, a C expression which determines whether, and in which direction,
2454 to pad out an argument with extra space. The value should be of type `enum
2455 direction': either `upward' to pad above the argument, `downward' to pad
2456 below, or `none' to inhibit padding.
2458 The *amount* of padding is always just enough to reach the next multiple of
2459 `FUNCTION_ARG_BOUNDARY'; this macro does not control it.
2461 This macro has a default definition which is right for most systems. For
2462 little-endian machines, the default is to pad upward. For big-endian
2463 machines, the default is to pad downward for an argument of constant size
2464 shorter than an `int', and upward otherwise. */
2465 /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */
2467 /* If defined, a C expression that gives the alignment boundary, in bits, of an
2468 argument with the specified mode and type. If it is not defined,
2469 `PARM_BOUNDARY' is used for all arguments. */
2471 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
2472 d30v_function_arg_boundary ((int) MODE, TYPE)
2474 /* A C expression that is nonzero if REGNO is the number of a hard register in
2475 which function arguments are sometimes passed. This does *not* include
2476 implicit arguments such as the static chain and the structure-value address.
2477 On many machines, no registers can be used for this purpose since all
2478 function arguments are pushed on the stack. */
2480 #define FUNCTION_ARG_REGNO_P(REGNO) \
2481 IN_RANGE_P (REGNO, GPR_ARG_FIRST, GPR_ARG_LAST)
2484 /* How Scalar Function Values are Returned */
2486 /* Define this macro if `-traditional' should not cause functions declared to
2487 return `float' to convert the value to `double'. */ /* #define
2488 TRADITIONAL_RETURN_FLOAT */
2490 /* A C expression to create an RTX representing the place where a function
2491 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
2492 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
2493 represent that type. On many machines, only the mode is relevant.
2494 (Actually, on most machines, scalar values are returned in the same place
2495 regardless of mode).
2497 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
2498 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
2500 If the precise function being called is known, FUNC is a tree node
2501 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
2502 possible to use a different value-returning convention for specific
2503 functions when all their calls are known.
2505 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
2506 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
2507 related macros, below. */
2509 #define FUNCTION_VALUE(VALTYPE, FUNC) \
2510 gen_rtx (REG, TYPE_MODE (VALTYPE), GPR_RET_VALUE)
2512 /* Define this macro if the target machine has "register windows" so that the
2513 register in which a function returns its value is not the same as the one in
2514 which the caller sees the value.
2516 For such machines, `FUNCTION_VALUE' computes the register in which the
2517 caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a
2518 similar fashion to tell the function where to put the value.
2520 If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both
2523 `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data
2524 types, because these are returned in another way. See `STRUCT_VALUE_REGNUM'
2525 and related macros, below. */
2526 /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */
2528 /* A C expression to create an RTX representing the place where a library
2529 function returns a value of mode MODE. If the precise function being called
2530 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a
2531 null pointer. This makes it possible to use a different value-returning
2532 convention for specific functions when all their calls are known.
2534 Note that "library function" in this context means a compiler support
2535 routine, used to perform arithmetic, whose name is known specially by the
2536 compiler and was not mentioned in the C code being compiled.
2538 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
2539 types, because none of the library functions returns such types. */
2541 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, GPR_RET_VALUE)
2543 /* A C expression that is nonzero if REGNO is the number of a hard register in
2544 which the values of called function may come back.
2546 A register whose use for returning values is limited to serving as the
2547 second of a pair (for a value of type `double', say) need not be recognized
2548 by this macro. So for most machines, this definition suffices:
2550 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
2552 If the machine has register windows, so that the caller and the called
2553 function use different registers for the return value, this macro should
2554 recognize only the caller's register numbers. */
2556 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == GPR_RET_VALUE)
2558 /* Define this macro if `untyped_call' and `untyped_return' need more space
2559 than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an
2560 arbitrary return value. */
2561 /* #define APPLY_RESULT_SIZE */
2564 /* How Large Values are Returned */
2566 /* A C expression which can inhibit the returning of certain function values in
2567 registers, based on the type of value. A nonzero value says to return the
2568 function value in memory, just as large structures are always returned.
2569 Here TYPE will be a C expression of type `tree', representing the data type
2572 Note that values of mode `BLKmode' must be explicitly handled by this macro.
2573 Also, the option `-fpcc-struct-return' takes effect regardless of this
2574 macro. On most systems, it is possible to leave the macro undefined; this
2575 causes a default definition to be used, whose value is the constant 1 for
2576 `BLKmode' values, and 0 otherwise.
2578 Do not use this macro to indicate that structures and unions should always
2579 be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN'
2580 to indicate this. */
2581 /* #define RETURN_IN_MEMORY(TYPE) */
2583 /* Define this macro to be 1 if all structure and union return values must be
2584 in memory. Since this results in slower code, this should be defined only
2585 if needed for compatibility with other compilers or with an ABI. If you
2586 define this macro to be 0, then the conventions used for structure and union
2587 return values are decided by the `RETURN_IN_MEMORY' macro.
2589 If not defined, this defaults to the value 1. */
2590 /* #define DEFAULT_PCC_STRUCT_RETURN */
2592 /* If the structure value address is passed in a register, then
2593 `STRUCT_VALUE_REGNUM' should be the number of that register. */
2595 #define STRUCT_VALUE_REGNUM GPR_ARG_FIRST
2597 /* If the structure value address is not passed in a register, define
2598 `STRUCT_VALUE' as an expression returning an RTX for the place where the
2599 address is passed. If it returns 0, the address is passed as an "invisible"
2602 #define STRUCT_VALUE 0
2604 /* On some architectures the place where the structure value address is found
2605 by the called function is not the same place that the caller put it. This
2606 can be due to register windows, or it could be because the function prologue
2607 moves it to a different place.
2609 If the incoming location of the structure value address is in a register,
2610 define this macro as the register number. */
2611 /* #define STRUCT_VALUE_INCOMING_REGNUM */
2613 /* If the incoming location is not a register, then you should define
2614 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called
2615 function should find the value. If it should find the value on the stack,
2616 define this to create a `mem' which refers to the frame pointer. A
2617 definition of 0 means that the address is passed as an "invisible" first
2619 /* #define STRUCT_VALUE_INCOMING */
2621 /* Define this macro if the usual system convention on the target machine for
2622 returning structures and unions is for the called function to return the
2623 address of a static variable containing the value.
2625 Do not define this if the usual system convention is for the caller to pass
2626 an address to the subroutine.
2628 This macro has effect in `-fpcc-struct-return' mode, but it does nothing
2629 when you use `-freg-struct-return' mode. */
2630 /* #define PCC_STATIC_STRUCT_RETURN */
2633 /* Caller-Saves Register Allocation */
2635 /* Define this macro if function calls on the target machine do not preserve
2636 any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all
2637 registers. This macro enables `-fcaller-saves' by default. Eventually that
2638 option will be enabled by default on all machines and both the option and
2639 this macro will be eliminated. */
2640 /* #define DEFAULT_CALLER_SAVES */
2642 /* A C expression to determine whether it is worthwhile to consider placing a
2643 pseudo-register in a call-clobbered hard register and saving and restoring
2644 it around each function call. The expression should be 1 when this is worth
2645 doing, and 0 otherwise.
2647 If you don't define this macro, a default is used which is good on most
2648 machines: `4 * CALLS < REFS'. */
2649 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
2652 /* Function Entry and Exit */
2654 /* A C compound statement that outputs the assembler code for entry to a
2655 function. The prologue is responsible for setting up the stack frame,
2656 initializing the frame pointer register, saving registers that must be
2657 saved, and allocating SIZE additional bytes of storage for the local
2658 variables. SIZE is an integer. FILE is a stdio stream to which the
2659 assembler code should be output.
2661 The label for the beginning of the function need not be output by this
2662 macro. That has already been done when the macro is run.
2664 To determine which registers to save, the macro can refer to the array
2665 `regs_ever_live': element R is nonzero if hard register R is used anywhere
2666 within the function. This implies the function prologue should save
2667 register R, provided it is not one of the call-used registers.
2668 (`FUNCTION_EPILOGUE' must likewise use `regs_ever_live'.)
2670 On machines that have "register windows", the function entry code does not
2671 save on the stack the registers that are in the windows, even if they are
2672 supposed to be preserved by function calls; instead it takes appropriate
2673 steps to "push" the register stack, if any non-call-used registers are used
2676 On machines where functions may or may not have frame-pointers, the function
2677 entry code must vary accordingly; it must set up the frame pointer if one is
2678 wanted, and not otherwise. To determine whether a frame pointer is in
2679 wanted, the macro can refer to the variable `frame_pointer_needed'. The
2680 variable's value will be 1 at run time in a function that needs a frame
2681 pointer. *Note Elimination::.
2683 The function entry code is responsible for allocating any stack space
2684 required for the function. This stack space consists of the regions listed
2685 below. In most cases, these regions are allocated in the order listed, with
2686 the last listed region closest to the top of the stack (the lowest address
2687 if `STACK_GROWS_DOWNWARD' is defined, and the highest address if it is not
2688 defined). You can use a different order for a machine if doing so is more
2689 convenient or required for compatibility reasons. Except in cases where
2690 required by standard or by a debugger, there is no reason why the stack
2691 layout used by GCC need agree with that used by other compilers for a
2694 * A region of `current_function_pretend_args_size' bytes of
2695 uninitialized space just underneath the first argument
2696 arriving on the stack. (This may not be at the very start of
2697 the allocated stack region if the calling sequence has pushed
2698 anything else since pushing the stack arguments. But
2699 usually, on such machines, nothing else has been pushed yet,
2700 because the function prologue itself does all the pushing.)
2701 This region is used on machines where an argument may be
2702 passed partly in registers and partly in memory, and, in some
2703 cases to support the features in `varargs.h' and `stdargs.h'.
2705 * An area of memory used to save certain registers used by the
2706 function. The size of this area, which may also include
2707 space for such things as the return address and pointers to
2708 previous stack frames, is machine-specific and usually
2709 depends on which registers have been used in the function.
2710 Machines with register windows often do not require a save
2713 * A region of at least SIZE bytes, possibly rounded up to an
2714 allocation boundary, to contain the local variables of the
2715 function. On some machines, this region and the save area
2716 may occur in the opposite order, with the save area closer to
2717 the top of the stack.
2719 * Optionally, when `ACCUMULATE_OUTGOING_ARGS' is defined, a
2720 region of `current_function_outgoing_args_size' bytes to be
2721 used for outgoing argument lists of the function. *Note
2724 Normally, it is necessary for the macros `FUNCTION_PROLOGUE' and
2725 `FUNCTION_EPILOGUE' to treat leaf functions specially. The C variable
2726 `leaf_function' is nonzero for such a function. */
2728 #define FUNCTION_PROLOGUE(FILE, SIZE) d30v_function_prologue (FILE, SIZE)
2730 /* Define this macro as a C expression that is nonzero if the return
2731 instruction or the function epilogue ignores the value of the stack pointer;
2732 in other words, if it is safe to delete an instruction to adjust the stack
2733 pointer before a return from the function.
2735 Note that this macro's value is relevant only for functions for which frame
2736 pointers are maintained. It is never safe to delete a final stack
2737 adjustment in a function that has no frame pointer, and the compiler knows
2738 this regardless of `EXIT_IGNORE_STACK'. */
2739 /* #define EXIT_IGNORE_STACK */
2741 /* Define this macro as a C expression that is nonzero for registers
2742 are used by the epilogue or the `return' pattern. The stack and
2743 frame pointer registers are already be assumed to be used as
2745 #define EPILOGUE_USES(REGNO) ((REGNO) == GPR_LINK)
2747 /* A C compound statement that outputs the assembler code for exit from a
2748 function. The epilogue is responsible for restoring the saved registers and
2749 stack pointer to their values when the function was called, and returning
2750 control to the caller. This macro takes the same arguments as the macro
2751 `FUNCTION_PROLOGUE', and the registers to restore are determined from
2752 `regs_ever_live' and `CALL_USED_REGISTERS' in the same way.
2754 On some machines, there is a single instruction that does all the work of
2755 returning from the function. On these machines, give that instruction the
2756 name `return' and do not define the macro `FUNCTION_EPILOGUE' at all.
2758 Do not define a pattern named `return' if you want the `FUNCTION_EPILOGUE'
2759 to be used. If you want the target switches to control whether return
2760 instructions or epilogues are used, define a `return' pattern with a
2761 validity condition that tests the target switches appropriately. If the
2762 `return' pattern's validity condition is false, epilogues will be used.
2764 On machines where functions may or may not have frame-pointers, the function
2765 exit code must vary accordingly. Sometimes the code for these two cases is
2766 completely different. To determine whether a frame pointer is wanted, the
2767 macro can refer to the variable `frame_pointer_needed'. The variable's
2768 value will be 1 when compiling a function that needs a frame pointer.
2770 Normally, `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE' must treat leaf
2771 functions specially. The C variable `leaf_function' is nonzero for such a
2772 function. *Note Leaf Functions::.
2774 On some machines, some functions pop their arguments on exit while others
2775 leave that for the caller to do. For example, the 68020 when given `-mrtd'
2776 pops arguments in functions that take a fixed number of arguments.
2778 Your definition of the macro `RETURN_POPS_ARGS' decides which functions pop
2779 their own arguments. `FUNCTION_EPILOGUE' needs to know what was decided.
2780 The variable that is called `current_function_pops_args' is the number of
2781 bytes of its arguments that a function should pop. *Note Scalar Return::. */
2783 #define FUNCTION_EPILOGUE(FILE, SIZE) d30v_function_epilogue (FILE, SIZE)
2785 /* Define this macro if the function epilogue contains delay slots to which
2786 instructions from the rest of the function can be "moved". The definition
2787 should be a C expression whose value is an integer representing the number
2788 of delay slots there. */
2789 /* #define DELAY_SLOTS_FOR_EPILOGUE */
2791 /* A C expression that returns 1 if INSN can be placed in delay slot number N
2794 The argument N is an integer which identifies the delay slot now being
2795 considered (since different slots may have different rules of eligibility).
2796 It is never negative and is always less than the number of epilogue delay
2797 slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular
2798 insn for a given delay slot, in principle, it may be reconsidered for a
2799 subsequent delay slot. Also, other insns may (at least in principle) be
2800 considered for the so far unfilled delay slot.
2802 The insns accepted to fill the epilogue delay slots are put in an
2803 RTL list made with `insn_list' objects, stored in the variable
2804 `current_function_epilogue_delay_list'. The insn for the first
2805 delay slot comes first in the list. Your definition of the macro
2806 `FUNCTION_EPILOGUE' should fill the delay slots by outputting the
2807 insns in this list, usually by calling `final_scan_insn'.
2809 You need not define this macro if you did not define
2810 `DELAY_SLOTS_FOR_EPILOGUE'. */
2811 /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */
2813 /* A C compound statement that outputs the assembler code for a thunk function,
2814 used to implement C++ virtual function calls with multiple inheritance. The
2815 thunk acts as a wrapper around a virtual function, adjusting the implicit
2816 object parameter before handing control off to the real function.
2818 First, emit code to add the integer DELTA to the location that contains the
2819 incoming first argument. Assume that this argument contains a pointer, and
2820 is the one used to pass the `this' pointer in C++. This is the incoming
2821 argument *before* the function prologue, e.g. `%o0' on a sparc. The
2822 addition must preserve the values of all other incoming arguments.
2824 After the addition, emit code to jump to FUNCTION, which is a
2825 `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch
2826 the return address. Hence returning from FUNCTION will return to whoever
2827 called the current `thunk'.
2829 The effect must be as if FUNCTION had been called directly with the adjusted
2830 first argument. This macro is responsible for emitting all of the code for
2831 a thunk function; `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE' are not
2834 The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been
2835 extracted from it.) It might possibly be useful on some targets, but
2838 If you do not define this macro, the target-independent code in the C++
2839 frontend will generate a less efficient heavyweight thunk that calls
2840 FUNCTION instead of jumping to it. The generic approach does not support
2842 /* #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) */
2845 /* Generating Code for Profiling. */
2847 /* A C statement or compound statement to output to FILE some assembler code to
2848 call the profiling subroutine `mcount'. Before calling, the assembler code
2849 must load the address of a counter variable into a register where `mcount'
2850 expects to find the address. The name of this variable is `LP' followed by
2851 the number LABELNO, so you would generate the name using `LP%d' in a
2854 The details of how the address should be passed to `mcount' are determined
2855 by your operating system environment, not by GNU CC. To figure them out,
2856 compile a small program for profiling using the system's installed C
2857 compiler and look at the assembler code that results. */
2859 #define FUNCTION_PROFILER(FILE, LABELNO) d30v_function_profiler (FILE, LABELNO)
2861 /* Define this macro if the code for function profiling should come before the
2862 function prologue. Normally, the profiling code comes after. */
2863 /* #define PROFILE_BEFORE_PROLOGUE */
2865 /* A C statement or compound statement to output to FILE some assembler code to
2866 initialize basic-block profiling for the current object module. The global
2867 compile flag `profile_block_flag' distingishes two profile modes.
2869 profile_block_flag != 2'
2870 Output code to call the subroutine `__bb_init_func' once per
2871 object module, passing it as its sole argument the address of
2872 a block allocated in the object module.
2874 The name of the block is a local symbol made with this
2877 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2879 Of course, since you are writing the definition of
2880 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2881 you can take a short cut in the definition of this macro and
2882 use the name that you know will result.
2884 The first word of this block is a flag which will be nonzero
2885 if the object module has already been initialized. So test
2886 this word first, and do not call `__bb_init_func' if the flag
2887 is nonzero. BLOCK_OR_LABEL contains a unique number which
2888 may be used to generate a label as a branch destination when
2889 `__bb_init_func' will not be called.
2891 Described in assembler language, the code to be output looks
2900 profile_block_flag == 2'
2901 Output code to call the subroutine `__bb_init_trace_func' and
2902 pass two parameters to it. The first parameter is the same as
2903 for `__bb_init_func'. The second parameter is the number of
2904 the first basic block of the function as given by
2905 BLOCK_OR_LABEL. Note that `__bb_init_trace_func' has to be
2906 called, even if the object module has been initialized
2909 Described in assembler language, the code to be output looks
2912 parameter2 <- BLOCK_OR_LABEL
2913 call __bb_init_trace_func */
2914 /* #define FUNCTION_BLOCK_PROFILER (FILE, LABELNO) */
2916 /* A C statement or compound statement to output to FILE some assembler code to
2917 increment the count associated with the basic block number BLOCKNO. The
2918 global compile flag `profile_block_flag' distingishes two profile modes.
2920 profile_block_flag != 2'
2921 Output code to increment the counter directly. Basic blocks
2922 are numbered separately from zero within each compilation.
2923 The count associated with block number BLOCKNO is at index
2924 BLOCKNO in a vector of words; the name of this array is a
2925 local symbol made with this statement:
2927 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 2);
2929 Of course, since you are writing the definition of
2930 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2931 you can take a short cut in the definition of this macro and
2932 use the name that you know will result.
2934 Described in assembler language, the code to be output looks
2937 inc (LPBX2+4*BLOCKNO)
2939 profile_block_flag == 2'
2940 Output code to initialize the global structure `__bb' and
2941 call the function `__bb_trace_func', which will increment the
2944 `__bb' consists of two words. In the first word, the current
2945 basic block number, as given by BLOCKNO, has to be stored. In
2946 the second word, the address of a block allocated in the
2947 object module has to be stored. The address is given by the
2948 label created with this statement:
2950 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2952 Described in assembler language, the code to be output looks
2954 move BLOCKNO -> (__bb)
2955 move LPBX0 -> (__bb+4)
2956 call __bb_trace_func */
2957 /* #define BLOCK_PROFILER(FILE, BLOCKNO) */
2959 /* A C statement or compound statement to output to FILE assembler
2960 code to call function `__bb_trace_ret'. The assembler code should
2961 only be output if the global compile flag `profile_block_flag' ==
2962 2. This macro has to be used at every place where code for
2963 returning from a function is generated (e.g. `FUNCTION_EPILOGUE').
2964 Although you have to write the definition of `FUNCTION_EPILOGUE'
2965 as well, you have to define this macro to tell the compiler, that
2966 the proper call to `__bb_trace_ret' is produced. */
2967 /* #define FUNCTION_BLOCK_PROFILER_EXIT(FILE) */
2969 /* A C statement or compound statement to save all registers, which may be
2970 clobbered by a function call, including condition codes. The `asm'
2971 statement will be mostly likely needed to handle this task. Local labels in
2972 the assembler code can be concatenated with the string ID, to obtain a
2975 Registers or condition codes clobbered by `FUNCTION_PROLOGUE' or
2976 `FUNCTION_EPILOGUE' must be saved in the macros `FUNCTION_BLOCK_PROFILER',
2977 `FUNCTION_BLOCK_PROFILER_EXIT' and `BLOCK_PROFILER' prior calling
2978 `__bb_init_trace_func', `__bb_trace_ret' and `__bb_trace_func' respectively. */
2979 /* #define MACHINE_STATE_SAVE(ID) */
2981 /* A C statement or compound statement to restore all registers, including
2982 condition codes, saved by `MACHINE_STATE_SAVE'.
2984 Registers or condition codes clobbered by `FUNCTION_PROLOGUE' or
2985 `FUNCTION_EPILOGUE' must be restored in the macros
2986 `FUNCTION_BLOCK_PROFILER', `FUNCTION_BLOCK_PROFILER_EXIT' and
2987 `BLOCK_PROFILER' after calling `__bb_init_trace_func', `__bb_trace_ret' and
2988 `__bb_trace_func' respectively. */
2989 /* #define MACHINE_STATE_RESTORE(ID) */
2991 /* A C function or functions which are needed in the library to support block
2993 /* #define BLOCK_PROFILER_CODE */
2996 /* Implementing the Varargs Macros. */
2998 /* If defined, is a C expression that produces the machine-specific code for a
2999 call to `__builtin_saveregs'. This code will be moved to the very beginning
3000 of the function, before any parameter access are made. The return value of
3001 this function should be an RTX that contains the value to use as the return
3002 of `__builtin_saveregs'.
3004 If this macro is not defined, the compiler will output an ordinary call to
3005 the library function `__builtin_saveregs'. */
3007 #define EXPAND_BUILTIN_SAVEREGS() d30v_expand_builtin_saveregs ()
3009 /* This macro offers an alternative to using `__builtin_saveregs' and defining
3010 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
3011 arguments into the stack so that all the arguments appear to have been
3012 passed consecutively on the stack. Once this is done, you can use the
3013 standard implementation of varargs that works for machines that pass all
3014 their arguments on the stack.
3016 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
3017 the values that obtain after processing of the named arguments. The
3018 arguments MODE and TYPE describe the last named argument--its machine mode
3019 and its data type as a tree node.
3021 The macro implementation should do two things: first, push onto the stack
3022 all the argument registers *not* used for the named arguments, and second,
3023 store the size of the data thus pushed into the `int'-valued variable whose
3024 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
3025 store here will serve as additional offset for setting up the stack frame.
3027 Because you must generate code to push the anonymous arguments at compile
3028 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
3029 useful on machines that have just a single category of argument register and
3030 use it uniformly for all data types.
3032 If the argument SECOND_TIME is nonzero, it means that the arguments of the
3033 function are being analyzed for the second time. This happens for an inline
3034 function, which is not actually compiled until the end of the source file.
3035 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
3038 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
3039 d30v_setup_incoming_varargs (&ARGS_SO_FAR, (int) MODE, TYPE, \
3040 &PRETEND_ARGS_SIZE, SECOND_TIME)
3042 /* Define this macro if the location where a function argument is passed
3043 depends on whether or not it is a named argument.
3045 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
3046 varargs and stdarg functions. With this macro defined, the NAMED argument
3047 is always true for named arguments, and false for unnamed arguments. If
3048 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
3049 arguments are treated as named. Otherwise, all named arguments except the
3050 last are treated as named. */
3051 /* #define STRICT_ARGUMENT_NAMING */
3053 /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not
3054 defined, it is assumed that va_list is a void * pointer. */
3056 #define BUILD_VA_LIST_TYPE(VALIST) \
3057 (VALIST) = d30v_build_va_list ()
3060 /* Implement the stdarg/varargs va_start macro. STDARG_P is non-zero if this
3061 is stdarg.h instead of varargs.h. VALIST is the tree of the va_list
3062 variable to initialize. NEXTARG is the machine independent notion of the
3063 'next' argument after the variable arguments. If not defined, a standard
3064 implementation will be defined that works for arguments passed on the stack. */
3066 #define EXPAND_BUILTIN_VA_START(STDARG_P, VALIST, NEXTARG) \
3067 (d30v_expand_builtin_va_start(STDARG_P, VALIST, NEXTARG))
3069 /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type
3070 va_list as a tree, TYPE is the type passed to va_arg. */
3072 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
3073 (d30v_expand_builtin_va_arg (VALIST, TYPE))
3075 /* Implement the stdarg/varargs va_end macro.
3076 VALIST is the variable of type va_list as a tree. */
3078 /* #define EXPAND_BUILTIN_VA_END(VALIST) */
3082 /* Trampolines for Nested Functions. */
3084 /* A C statement to output, on the stream FILE, assembler code for a block of
3085 data that contains the constant parts of a trampoline. This code should not
3086 include a label--the label is taken care of automatically. */
3087 /* #define TRAMPOLINE_TEMPLATE(FILE) d30v_trampoline_template (FILE) */
3089 /* The name of a subroutine to switch to the section in which the trampoline
3090 template is to be placed (*note Sections::.). The default is a value of
3091 `readonly_data_section', which places the trampoline in the section
3092 containing read-only data. */
3093 /* #define TRAMPOLINE_SECTION */
3095 /* A C expression for the size in bytes of the trampoline, as an integer. */
3096 #define TRAMPOLINE_SIZE (d30v_trampoline_size ())
3098 /* Alignment required for trampolines, in bits.
3100 If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for
3101 aligning trampolines. */
3102 #define TRAMPOLINE_ALIGNMENT 64
3104 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
3105 RTX for the address of the trampoline; FNADDR is an RTX for the address of
3106 the nested function; STATIC_CHAIN is an RTX for the static chain value that
3107 should be passed to the function when it is called. */
3108 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
3109 d30v_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
3111 /* A C expression to allocate run-time space for a trampoline. The expression
3112 value should be an RTX representing a memory reference to the space for the
3115 If this macro is not defined, by default the trampoline is allocated as a
3116 stack slot. This default is right for most machines. The exceptions are
3117 machines where it is impossible to execute instructions in the stack area.
3118 On such machines, you may have to implement a separate stack, using this
3119 macro in conjunction with `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE'.
3121 FP points to a data structure, a `struct function', which describes the
3122 compilation status of the immediate containing function of the function
3123 which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not
3124 defined), the stack slot for the trampoline is in the stack frame of this
3125 containing function. Other allocation strategies probably must do something
3126 analogous with this information. */
3127 /* #define ALLOCATE_TRAMPOLINE(FP) */
3129 /* Implementing trampolines is difficult on many machines because they have
3130 separate instruction and data caches. Writing into a stack location fails
3131 to clear the memory in the instruction cache, so when the program jumps to
3132 that location, it executes the old contents.
3134 Here are two possible solutions. One is to clear the relevant parts of the
3135 instruction cache whenever a trampoline is set up. The other is to make all
3136 trampolines identical, by having them jump to a standard subroutine. The
3137 former technique makes trampoline execution faster; the latter makes
3138 initialization faster.
3140 To clear the instruction cache when a trampoline is initialized, define the
3141 following macros which describe the shape of the cache. */
3143 /* The total size in bytes of the cache. */
3144 /* #define INSN_CACHE_SIZE */
3146 /* The length in bytes of each cache line. The cache is divided into cache
3147 lines which are disjoint slots, each holding a contiguous chunk of data
3148 fetched from memory. Each time data is brought into the cache, an entire
3149 line is read at once. The data loaded into a cache line is always aligned
3150 on a boundary equal to the line size. */
3151 /* #define INSN_CACHE_LINE_WIDTH */
3153 /* The number of alternative cache lines that can hold any particular memory
3155 /* #define INSN_CACHE_DEPTH */
3157 /* Alternatively, if the machine has system calls or instructions to clear the
3158 instruction cache directly, you can define the following macro. */
3160 /* If defined, expands to a C expression clearing the *instruction cache* in
3161 the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE
3162 is defined, some generic code is generated to clear the cache. The
3163 definition of this macro would typically be a series of `asm' statements.
3164 Both BEG and END are both pointer expressions. */
3165 /* #define CLEAR_INSN_CACHE (BEG, END) */
3167 /* To use a standard subroutine, define the following macro. In addition, you
3168 must make sure that the instructions in a trampoline fill an entire cache
3169 line with identical instructions, or else ensure that the beginning of the
3170 trampoline code is always aligned at the same point in its cache line. Look
3171 in `m68k.h' as a guide. */
3173 /* Define this macro if trampolines need a special subroutine to do their work.
3174 The macro should expand to a series of `asm' statements which will be
3175 compiled with GNU CC. They go in a library function named
3176 `__transfer_from_trampoline'.
3178 If you need to avoid executing the ordinary prologue code of a compiled C
3179 function when you jump to the subroutine, you can do so by placing a special
3180 label of your own in the assembler code. Use one `asm' statement to
3181 generate an assembler label, and another to make the label global. Then
3182 trampolines can use that label to jump directly to your special assembler
3184 /* #define TRANSFER_FROM_TRAMPOLINE */
3187 /* Implicit Calls to Library Routines */
3189 /* A C string constant giving the name of the function to call for
3190 multiplication of one signed full-word by another. If you do not define
3191 this macro, the default name is used, which is `__mulsi3', a function
3192 defined in `libgcc.a'. */
3193 /* #define MULSI3_LIBCALL */
3195 /* A C string constant giving the name of the function to call for division of
3196 one signed full-word by another. If you do not define this macro, the
3197 default name is used, which is `__divsi3', a function defined in `libgcc.a'. */
3198 /* #define DIVSI3_LIBCALL */
3200 /* A C string constant giving the name of the function to call for division of
3201 one unsigned full-word by another. If you do not define this macro, the
3202 default name is used, which is `__udivsi3', a function defined in
3204 /* #define UDIVSI3_LIBCALL */
3206 /* A C string constant giving the name of the function to call for the
3207 remainder in division of one signed full-word by another. If you do not
3208 define this macro, the default name is used, which is `__modsi3', a function
3209 defined in `libgcc.a'. */
3210 /* #define MODSI3_LIBCALL */
3212 /* A C string constant giving the name of the function to call for the
3213 remainder in division of one unsigned full-word by another. If you do not
3214 define this macro, the default name is used, which is `__umodsi3', a
3215 function defined in `libgcc.a'. */
3216 /* #define UMODSI3_LIBCALL */
3218 /* A C string constant giving the name of the function to call for
3219 multiplication of one signed double-word by another. If you do not define
3220 this macro, the default name is used, which is `__muldi3', a function
3221 defined in `libgcc.a'. */
3222 /* #define MULDI3_LIBCALL */
3224 /* A C string constant giving the name of the function to call for division of
3225 one signed double-word by another. If you do not define this macro, the
3226 default name is used, which is `__divdi3', a function defined in `libgcc.a'. */
3227 /* #define DIVDI3_LIBCALL */
3229 /* A C string constant giving the name of the function to call for division of
3230 one unsigned full-word by another. If you do not define this macro, the
3231 default name is used, which is `__udivdi3', a function defined in
3233 /* #define UDIVDI3_LIBCALL */
3235 /* A C string constant giving the name of the function to call for the
3236 remainder in division of one signed double-word by another. If you do not
3237 define this macro, the default name is used, which is `__moddi3', a function
3238 defined in `libgcc.a'. */
3239 /* #define MODDI3_LIBCALL */
3241 /* A C string constant giving the name of the function to call for the
3242 remainder in division of one unsigned full-word by another. If you do not
3243 define this macro, the default name is used, which is `__umoddi3', a
3244 function defined in `libgcc.a'. */
3245 /* #define UMODDI3_LIBCALL */
3247 /* Define this macro as a C statement that declares additional library routines
3248 renames existing ones. `init_optabs' calls this macro after initializing all
3249 the normal library routines. */
3250 /* #define INIT_TARGET_OPTABS */
3252 /* The value of `EDOM' on the target machine, as a C integer constant
3253 expression. If you don't define this macro, GNU CC does not attempt to
3254 deposit the value of `EDOM' into `errno' directly. Look in
3255 `/usr/include/errno.h' to find the value of `EDOM' on your system.
3257 If you do not define `TARGET_EDOM', then compiled code reports domain errors
3258 by calling the library function and letting it report the error. If
3259 mathematical functions on your system use `matherr' when there is an error,
3260 then you should leave `TARGET_EDOM' undefined so that `matherr' is used
3262 /* #define TARGET_EDOM */
3264 /* Define this macro as a C expression to create an rtl expression that refers
3265 to the global "variable" `errno'. (On certain systems, `errno' may not
3266 actually be a variable.) If you don't define this macro, a reasonable
3268 /* #define GEN_ERRNO_RTX */
3270 /* Define this macro if GNU CC should generate calls to the System V (and ANSI
3271 C) library functions `memcpy' and `memset' rather than the BSD functions
3272 `bcopy' and `bzero'.
3274 Defined in svr4.h. */
3275 /* #define TARGET_MEM_FUNCTIONS */
3277 /* Define this macro if only `float' arguments cannot be passed to library
3278 routines (so they must be converted to `double'). This macro affects both
3279 how library calls are generated and how the library routines in `libgcc1.c'
3280 accept their arguments. It is useful on machines where floating and fixed
3281 point arguments are passed differently, such as the i860. */
3282 /* #define LIBGCC_NEEDS_DOUBLE */
3284 /* Define this macro to override the type used by the library routines to pick
3285 up arguments of type `float'. (By default, they use a union of `float' and
3288 The obvious choice would be `float'--but that won't work with traditional C
3289 compilers that expect all arguments declared as `float' to arrive as
3290 `double'. To avoid this conversion, the library routines ask for the value
3291 as some other type and then treat it as a `float'.
3293 On some systems, no other type will work for this. For these systems, you
3294 must use `LIBGCC_NEEDS_DOUBLE' instead, to force conversion of the values
3295 `double' before they are passed. */
3296 /* #define FLOAT_ARG_TYPE */
3298 /* Define this macro to override the way library routines redesignate a `float'
3299 argument as a `float' instead of the type it was passed as. The default is
3300 an expression which takes the `float' field of the union. */
3301 /* #define FLOATIFY(PASSED_VALUE) */
3303 /* Define this macro to override the type used by the library routines to
3304 return values that ought to have type `float'. (By default, they use
3307 The obvious choice would be `float'--but that won't work with traditional C
3308 compilers gratuitously convert values declared as `float' into `double'. */
3309 /* #define FLOAT_VALUE_TYPE */
3311 /* Define this macro to override the way the value of a `float'-returning
3312 library routine should be packaged in order to return it. These functions
3313 are actually declared to return type `FLOAT_VALUE_TYPE' (normally `int').
3315 These values can't be returned as type `float' because traditional C
3316 compilers would gratuitously convert the value to a `double'.
3318 A local variable named `intify' is always available when the macro `INTIFY'
3319 is used. It is a union of a `float' field named `f' and a field named `i'
3320 whose type is `FLOAT_VALUE_TYPE' or `int'.
3322 If you don't define this macro, the default definition works by copying the
3323 value through that union. */
3324 /* #define INTIFY(FLOAT_VALUE) */
3326 /* Define this macro as the name of the data type corresponding to `SImode' in
3327 the system's own C compiler.
3329 You need not define this macro if that type is `long int', as it usually is. */
3330 /* #define nongcc_SI_type */
3332 /* Define this macro as the name of the data type corresponding to the
3333 word_mode in the system's own C compiler.
3335 You need not define this macro if that type is `long int', as it usually is. */
3336 /* #define nongcc_word_type */
3338 /* Define these macros to supply explicit C statements to carry out various
3339 arithmetic operations on types `float' and `double' in the library routines
3340 in `libgcc1.c'. See that file for a full list of these macros and their
3343 On most machines, you don't need to define any of these macros, because the
3344 C compiler that comes with the system takes care of doing them. */
3345 /* #define perform_... */
3347 /* Define this macro to generate code for Objective C message sending using the
3348 calling convention of the NeXT system. This calling convention involves
3349 passing the object, the selector and the method arguments all at once to the
3350 method-lookup library function.
3352 The default calling convention passes just the object and the selector to
3353 the lookup function, which returns a pointer to the method. */
3354 /* #define NEXT_OBJC_RUNTIME */
3357 /* Addressing Modes */
3359 /* Define this macro if the machine supports post-increment addressing. */
3360 #define HAVE_POST_INCREMENT 1
3362 /* Similar for other kinds of addressing. */
3363 /* #define HAVE_PRE_INCREMENT 0 */
3364 #define HAVE_POST_DECREMENT 1
3365 /* #define HAVE_PRE_DECREMENT 0 */
3367 /* A C expression that is 1 if the RTX X is a constant which is a valid
3368 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
3369 few machines are more restrictive in which constant addresses are supported.
3371 `CONSTANT_P' accepts integer-values expressions whose values are not
3372 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
3373 and `const' arithmetic expressions, in addition to `const_int' and
3374 `const_double' expressions. */
3375 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
3377 /* A number, the maximum number of registers that can appear in a valid memory
3378 address. Note that it is up to you to specify a value equal to the maximum
3379 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
3380 #define MAX_REGS_PER_ADDRESS 2
3382 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
3383 RTX) is a legitimate memory address on the target machine for a memory
3384 operand of mode MODE.
3386 It usually pays to define several simpler macros to serve as subroutines for
3387 this one. Otherwise it may be too complicated to understand.
3389 This macro must exist in two variants: a strict variant and a non-strict
3390 one. The strict variant is used in the reload pass. It must be defined so
3391 that any pseudo-register that has not been allocated a hard register is
3392 considered a memory reference. In contexts where some kind of register is
3393 required, a pseudo-register with no hard register must be rejected.
3395 The non-strict variant is used in other passes. It must be defined to
3396 accept all pseudo-registers in every context where some kind of register is
3399 Compiler source files that want to use the strict variant of this macro
3400 define the macro `REG_OK_STRICT'. You should use an `#ifdef REG_OK_STRICT'
3401 conditional to define the strict variant in that case and the non-strict
3404 Subroutines to check for acceptable registers for various purposes (one for
3405 base registers, one for index registers, and so on) are typically among the
3406 subroutines used to define `GO_IF_LEGITIMATE_ADDRESS'. Then only these
3407 subroutine macros need have two variants; the higher levels of macros may be
3408 the same whether strict or not.
3410 Normally, constant addresses which are the sum of a `symbol_ref' and an
3411 integer are stored inside a `const' RTX to mark them as constant.
3412 Therefore, there is no need to recognize such sums specifically as
3413 legitimate addresses. Normally you would simply recognize any `const' as
3416 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant sums that
3417 are not marked with `const'. It assumes that a naked `plus' indicates
3418 indexing. If so, then you *must* reject such naked constant sums as
3419 illegitimate addresses, so that none of them will be given to
3420 `PRINT_OPERAND_ADDRESS'.
3422 On some machines, whether a symbolic address is legitimate depends on the
3423 section that the address refers to. On these machines, define the macro
3424 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
3425 then check for it here. When you see a `const', you will have to look
3426 inside it to find the `symbol_ref' in order to determine the section. *Note
3429 The best way to modify the name string is by adding text to the beginning,
3430 with suitable punctuation to prevent any ambiguity. Allocate the new name
3431 in `saveable_obstack'. You will have to modify `ASM_OUTPUT_LABELREF' to
3432 remove and decode the added text and output the name accordingly, and define
3433 `STRIP_NAME_ENCODING' to access the original name string.
3435 You can check the information stored here into the `symbol_ref' in the
3436 definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
3437 `PRINT_OPERAND_ADDRESS'. */
3439 #ifdef REG_OK_STRICT
3440 #define REG_OK_STRICT_P 1
3442 #define REG_OK_STRICT_P 0
3445 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
3447 if (d30v_legitimate_address_p ((int)MODE, X, REG_OK_STRICT_P)) \
3451 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3452 use as a base register. For hard registers, it should always accept those
3453 which the hardware permits and reject the others. Whether the macro accepts
3454 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
3455 described above. This usually requires two variant definitions, of which
3456 `REG_OK_STRICT' controls the one actually used. */
3458 #ifdef REG_OK_STRICT
3459 #define REG_OK_FOR_BASE_P(X) (GPR_P (REGNO (X)))
3461 #define REG_OK_FOR_BASE_P(X) (GPR_OR_PSEUDO_P (REGNO (X)))
3464 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3465 use as an index register.
3467 The difference between an index register and a base register is that the
3468 index register may be scaled. If an address involves the sum of two
3469 registers, neither one of them scaled, then either one may be labeled the
3470 "base" and the other the "index"; but whichever labeling is used must fit
3471 the machine's constraints of which registers may serve in each capacity.
3472 The compiler will try both labelings, looking for one that is valid, and
3473 will reload one or both registers only if neither labeling works. */
3475 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
3477 /* A C compound statement that attempts to replace X with a valid memory
3478 address for an operand of mode MODE. WIN will be a C statement label
3479 elsewhere in the code; the macro definition may use
3481 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
3483 to avoid further processing if the address has become legitimate.
3485 X will always be the result of a call to `break_out_memory_refs', and OLDX
3486 will be the operand that was given to that function to produce X.
3488 The code generated by this macro should not alter the substructure of X. If
3489 it transforms X into a more legitimate form, it should assign X (which will
3490 always be a C variable) a new value.
3492 It is not necessary for this macro to come up with a legitimate address.
3493 The compiler has standard ways of doing so in all cases. In fact, it is
3494 safe for this macro to do nothing. But often a machine-dependent strategy
3495 can generate better code. */
3497 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
3499 rtx y = d30v_legitimize_address (X, OLDX, (int)MODE, REG_OK_STRICT_P); \
3503 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); \
3507 /* A C statement or compound statement with a conditional `goto LABEL;'
3508 executed if memory address X (an RTX) can have different meanings depending
3509 on the machine mode of the memory reference it is used for or if the address
3510 is valid for some modes but not others.
3512 Autoincrement and autodecrement addresses typically have mode-dependent
3513 effects because the amount of the increment or decrement is the size of the
3514 operand being addressed. Some machines have other mode-dependent addresses.
3515 Many RISC machines have no mode-dependent addresses.
3517 You may assume that ADDR is a valid address for the machine. */
3519 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
3521 if (d30v_mode_dependent_address_p (ADDR)) \
3525 /* A C expression that is nonzero if X is a legitimate constant for an
3526 immediate operand on the target machine. You can assume that X satisfies
3527 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
3528 definition for this macro on machines where anything `CONSTANT_P' is valid. */
3529 #define LEGITIMATE_CONSTANT_P(X) 1
3532 /* Condition Code Status */
3534 /* C code for a data type which is used for declaring the `mdep' component of
3535 `cc_status'. It defaults to `int'.
3537 This macro is not used on machines that do not use `cc0'. */
3538 /* #define CC_STATUS_MDEP */
3540 /* A C expression to initialize the `mdep' field to "empty". The default
3541 definition does nothing, since most machines don't use the field anyway. If
3542 you want to use the field, you should probably define this macro to
3545 This macro is not used on machines that do not use `cc0'. */
3546 /* #define CC_STATUS_MDEP_INIT */
3548 /* A C compound statement to set the components of `cc_status' appropriately
3549 for an insn INSN whose body is EXP. It is this macro's responsibility to
3550 recognize insns that set the condition code as a byproduct of other activity
3551 as well as those that explicitly set `(cc0)'.
3553 This macro is not used on machines that do not use `cc0'.
3555 If there are insns that do not set the condition code but do alter other
3556 machine registers, this macro must check to see whether they invalidate the
3557 expressions that the condition code is recorded as reflecting. For example,
3558 on the 68000, insns that store in address registers do not set the condition
3559 code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status'
3560 unaltered for such insns. But suppose that the previous insn set the
3561 condition code based on location `a4@(102)' and the current insn stores a
3562 new value in `a4'. Although the condition code is not changed by this, it
3563 will no longer be true that it reflects the contents of `a4@(102)'.
3564 Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say
3565 that nothing is known about the condition code value.
3567 The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the
3568 results of peephole optimization: insns whose patterns are `parallel' RTXs
3569 containing various `reg', `mem' or constants which are just the operands.
3570 The RTL structure of these insns is not sufficient to indicate what the
3571 insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is
3572 just to run `CC_STATUS_INIT'.
3574 A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks
3575 at an attribute (*note Insn Attributes::.) named, for example, `cc'. This
3576 avoids having detailed information about patterns in two places, the `md'
3577 file and in `NOTICE_UPDATE_CC'. */
3578 /* #define NOTICE_UPDATE_CC(EXP, INSN) */
3580 /* A list of names to be used for additional modes for condition code values in
3581 registers (*note Jump Patterns::.). These names are added to `enum
3582 machine_mode' and all have class `MODE_CC'. By convention, they should
3583 start with `CC' and end with `mode'.
3585 You should only define this macro if your machine does not use `cc0' and
3586 only if additional modes are required. */
3587 /* #define EXTRA_CC_MODES */
3589 /* Returns a mode from class `MODE_CC' to be used when comparison operation
3590 code OP is applied to rtx X and Y. For example, on the Sparc,
3591 `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a
3592 description of the reason for this definition)
3594 #define SELECT_CC_MODE(OP,X,Y) \
3595 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
3596 ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \
3597 : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \
3598 || GET_CODE (X) == NEG) \
3599 ? CC_NOOVmode : CCmode))
3601 You need not define this macro if `EXTRA_CC_MODES' is not defined. */
3602 /* #define SELECT_CC_MODE(OP, X, Y) */
3604 /* One some machines not all possible comparisons are defined, but you can
3605 convert an invalid comparison into a valid one. For example, the Alpha does
3606 not have a `GT' comparison, but you can use an `LT' comparison instead and
3607 swap the order of the operands.
3609 On such machines, define this macro to be a C statement to do any required
3610 conversions. CODE is the initial comparison code and OP0 and OP1 are the
3611 left and right operands of the comparison, respectively. You should modify
3612 CODE, OP0, and OP1 as required.
3614 GNU CC will not assume that the comparison resulting from this macro is
3615 valid but will see if the resulting insn matches a pattern in the `md' file.
3617 You need not define this macro if it would never change the comparison code
3619 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
3621 /* A C expression whose value is one if it is always safe to reverse a
3622 comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for
3623 a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)'
3626 You need not define this macro if it would always returns zero or if the
3627 floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For
3628 example, here is the definition used on the Sparc, where floating-point
3629 inequality comparisons are always given `CCFPEmode':
3631 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */
3632 /* #define REVERSIBLE_CC_MODE(MODE) */
3635 /* Describing Relative Costs of Operations */
3637 /* A part of a C `switch' statement that describes the relative costs of
3638 constant RTL expressions. It must contain `case' labels for expression
3639 codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'.
3640 Each case must ultimately reach a `return' statement to return the relative
3641 cost of the use of that kind of constant value in an expression. The cost
3642 may depend on the precise value of the constant, which is available for
3643 examination in X, and the rtx code of the expression in which it is
3644 contained, found in OUTER_CODE.
3646 CODE is the expression code--redundant, since it can be obtained with
3649 /* On the d30v, consider operatnds that fit in a short instruction very
3650 cheap. However, at this time, it causes cse to generate incorrect
3651 code, so disable it for now. */
3653 #define CONST_COSTS(X, CODE, OUTER_CODE) \
3655 if (IN_RANGE_P (INTVAL (X), 0, 31)) \
3657 else if ((OUTER_CODE) == LEU && (OUTER_CODE) == LTU \
3658 && (OUTER_CODE) == GEU && (OUTER_CODE) == GTU) \
3659 return IN_RANGE_P (INTVAL (X), 32, 63) ? 0 : COSTS_N_INSNS (2); \
3661 return IN_RANGE_P (INTVAL (X), -31, -1) ? 0 : COSTS_N_INSNS (2); \
3665 return COSTS_N_INSNS (2); \
3666 case CONST_DOUBLE: \
3667 return COSTS_N_INSNS ((GET_MODE (X) == SFmode) ? 2 : 4);
3669 #define CONST_COSTS(X, CODE, OUTER_CODE)
3672 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be
3673 used, for example, to indicate how costly a multiply instruction is. In
3674 writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify
3675 a cost equal to N fast instructions. OUTER_CODE is the code of the
3676 expression in which X is contained.
3678 This macro is optional; do not define it if the default cost assumptions are
3679 adequate for the target machine. */
3680 #define RTX_COSTS(X, CODE, OUTER_CODE) \
3682 return COSTS_N_INSNS ((GET_CODE (XEXP (x, 1)) == CONST_INT \
3683 && exact_log2 (INTVAL (XEXP (x, 1))) >= 0) \
3686 /* An expression giving the cost of an addressing mode that contains ADDRESS.
3687 If not defined, the cost is computed from the ADDRESS expression and the
3688 `CONST_COSTS' values.
3690 For most CISC machines, the default cost is a good approximation of the true
3691 cost of the addressing mode. However, on RISC machines, all instructions
3692 normally have the same length and execution time. Hence all addresses will
3695 In cases where more than one form of an address is known, the form with the
3696 lowest cost will be used. If multiple forms have the same, lowest, cost,
3697 the one that is the most complex will be used.
3699 For example, suppose an address that is equal to the sum of a register and a
3700 constant is used twice in the same basic block. When this macro is not
3701 defined, the address will be computed in a register and memory references
3702 will be indirect through that register. On machines where the cost of the
3703 addressing mode containing the sum is no higher than that of a simple
3704 indirect reference, this will produce an additional instruction and possibly
3705 require an additional register. Proper specification of this macro
3706 eliminates this overhead for such machines.
3708 Similar use of this macro is made in strength reduction of loops.
3710 ADDRESS need not be valid as an address. In such a case, the cost is not
3711 relevant and can be any value; invalid addresses need not be assigned a
3714 On machines where an address involving more than one register is as cheap as
3715 an address computation involving only one register, defining `ADDRESS_COST'
3716 to reflect this can cause two registers to be live over a region of code
3717 where only one would have been if `ADDRESS_COST' were not defined in that
3718 manner. This effect should be considered in the definition of this macro.
3719 Equivalent costs should probably only be given to addresses with different
3720 numbers of registers on machines with lots of registers.
3722 This macro will normally either not be defined or be defined as a constant. */
3723 #define ADDRESS_COST(ADDRESS) 0
3725 /* A C expression for the cost of moving data from a register in class FROM to
3726 one in class TO. The classes are expressed using the enumeration values
3727 such as `GENERAL_REGS'. A value of 4 is the default; other values are
3728 interpreted relative to that.
3730 It is not required that the cost always equal 2 when FROM is the same as TO;
3731 on some machines it is expensive to move between registers if they are not
3734 If reload sees an insn consisting of a single `set' between two hard
3735 registers, and if `REGISTER_MOVE_COST' applied to their classes returns a
3736 value of 2, reload does not check to ensure that the constraints of the insn
3737 are met. Setting a cost of other than 2 will allow reload to verify that
3738 the constraints are met. You should do this if the `movM' pattern's
3739 constraints do not allow such copying. */
3741 #define REGISTER_MOVE_COST(FROM, TO) \
3742 (((FROM) != GPR_REGS && (FROM) != EVEN_REGS \
3743 && (TO) != GPR_REGS && (TO) != EVEN_REGS) ? 4 : 2)
3745 /* A C expression for the cost of moving data of mode M between a register and
3746 memory. A value of 2 is the default; this cost is relative to those in
3747 `REGISTER_MOVE_COST'.
3749 If moving between registers and memory is more expensive than between two
3750 registers, you should define this macro to express the relative cost. */
3751 #define MEMORY_MOVE_COST(M,C,I) 4
3753 /* A C expression for the cost of a branch instruction. A value of 1 is the
3754 default; other values are interpreted relative to that. */
3756 #define BRANCH_COST d30v_branch_cost
3758 #define D30V_DEFAULT_BRANCH_COST 2
3760 /* Values of the -mbranch-cost=n string. */
3761 extern int d30v_branch_cost;
3762 extern const char *d30v_branch_cost_string;
3764 /* Here are additional macros which do not specify precise relative costs, but
3765 only that certain actions are more expensive than GNU CC would ordinarily
3768 /* Define this macro as a C expression which is nonzero if accessing less than
3769 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
3770 word of memory, i.e., if such access require more than one instruction or if
3771 there is no difference in cost between byte and (aligned) word loads.
3773 When this macro is not defined, the compiler will access a field by finding
3774 the smallest containing object; when it is defined, a fullword load will be
3775 used if alignment permits. Unless bytes accesses are faster than word
3776 accesses, using word accesses is preferable since it may eliminate
3777 subsequent memory access if subsequent accesses occur to other fields in the
3778 same word of the structure, but to different bytes. */
3779 #define SLOW_BYTE_ACCESS 1
3781 /* Define this macro if zero-extension (of a `char' or `short' to an `int') can
3782 be done faster if the destination is a register that is known to be zero.
3784 If you define this macro, you must have instruction patterns that recognize
3785 RTL structures like this:
3787 (set (strict_low_part (subreg:QI (reg:SI ...) 0)) ...)
3789 and likewise for `HImode'. */
3790 #define SLOW_ZERO_EXTEND 0
3792 /* Define this macro to be the value 1 if unaligned accesses have a cost many
3793 times greater than aligned accesses, for example if they are emulated in a
3796 When this macro is non-zero, the compiler will act as if `STRICT_ALIGNMENT'
3797 were non-zero when generating code for block moves. This can cause
3798 significantly more instructions to be produced. Therefore, do not set this
3799 macro non-zero if unaligned accesses only add a cycle or two to the time for
3802 If the value of this macro is always zero, it need not be defined. */
3803 /* #define SLOW_UNALIGNED_ACCESS */
3805 /* Define this macro to inhibit strength reduction of memory addresses. (On
3806 some machines, such strength reduction seems to do harm rather than good.) */
3807 /* #define DONT_REDUCE_ADDR */
3809 /* The number of scalar move insns which should be generated instead of a
3810 string move insn or a library call. Increasing the value will always make
3811 code faster, but eventually incurs high cost in increased code size.
3813 If you don't define this, a reasonable default is used. */
3814 /* #define MOVE_RATIO */
3816 /* Define this macro if it is as good or better to call a constant function
3817 address than to call an address kept in a register. */
3818 #define NO_FUNCTION_CSE
3820 /* Define this macro if it is as good or better for a function to call itself
3821 with an explicit address than to call an address kept in a register. */
3822 /* #define NO_RECURSIVE_FUNCTION_CSE */
3824 /* A C statement (sans semicolon) to update the integer variable COST based on
3825 the relationship between INSN that is dependent on DEP_INSN through the
3826 dependence LINK. The default is to make no adjustment to COST. This can be
3827 used for example to specify to the scheduler that an output- or
3828 anti-dependence does not incur the same cost as a data-dependence. */
3830 #define ADJUST_COST(INSN,LINK,DEP_INSN,COST) \
3831 (COST) = d30v_adjust_cost (INSN, LINK, DEP_INSN, COST)
3833 /* A C statement (sans semicolon) to update the integer scheduling
3834 priority `INSN_PRIORITY(INSN)'. Reduce the priority to execute
3835 the INSN earlier, increase the priority to execute INSN later.
3836 Do not define this macro if you do not need to adjust the
3837 scheduling priorities of insns. */
3838 /* #define ADJUST_PRIORITY (INSN) */
3840 /* Macro to determine whether the Haifa scheduler is used. */
3848 /* Dividing the output into sections. */
3850 /* A C expression whose value is a string containing the assembler operation
3851 that should precede instructions and read-only data. Normally `".text"' is
3853 #define TEXT_SECTION_ASM_OP "\t.text"
3855 /* A C expression whose value is a string containing the assembler operation to
3856 identify the following data as writable initialized data. Normally
3857 `".data"' is right. */
3858 #define DATA_SECTION_ASM_OP "\t.data"
3860 /* if defined, a C expression whose value is a string containing the assembler
3861 operation to identify the following data as shared data. If not defined,
3862 `DATA_SECTION_ASM_OP' will be used. */
3863 /* #define SHARED_SECTION_ASM_OP */
3865 /* If defined, a C expression whose value is a string containing the
3866 assembler operation to identify the following data as
3867 uninitialized global data. If not defined, and neither
3868 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
3869 uninitialized global data will be output in the data section if
3870 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
3872 #define BSS_SECTION_ASM_OP "\t.bss"
3874 /* If defined, a C expression whose value is a string containing the
3875 assembler operation to identify the following data as
3876 uninitialized global shared data. If not defined, and
3877 `BSS_SECTION_ASM_OP' is, the latter will be used. */
3878 /* #define SHARED_BSS_SECTION_ASM_OP */
3880 /* A list of names for sections other than the standard two, which are
3881 `in_text' and `in_data'. You need not define this macro on a system with no
3882 other sections (that GCC needs to use).
3884 Defined in svr4.h. */
3885 /* #define EXTRA_SECTIONS */
3887 /* One or more functions to be defined in `varasm.c'. These functions should
3888 do jobs analogous to those of `text_section' and `data_section', for your
3889 additional sections. Do not define this macro if you do not define
3892 Defined in svr4.h. */
3893 /* #define EXTRA_SECTION_FUNCTIONS */
3895 /* On most machines, read-only variables, constants, and jump tables are placed
3896 in the text section. If this is not the case on your machine, this macro
3897 should be defined to be the name of a function (either `data_section' or a
3898 function defined in `EXTRA_SECTIONS') that switches to the section to be
3899 used for read-only items.
3901 If these items should be placed in the text section, this macro should not
3903 /* #define READONLY_DATA_SECTION */
3905 /* A C statement or statements to switch to the appropriate section for output
3906 of EXP. You can assume that EXP is either a `VAR_DECL' node or a constant
3907 of some sort. RELOC indicates whether the initial value of EXP requires
3908 link-time relocations. Select the section by calling `text_section' or one
3909 of the alternatives for other sections.
3911 Do not define this macro if you put all read-only variables and constants in
3912 the read-only data section (usually the text section).
3914 Defined in svr4.h. */
3915 /* #define SELECT_SECTION(EXP, RELOC) */
3917 /* A C statement or statements to switch to the appropriate section for output
3918 of RTX in mode MODE. You can assume that RTX is some kind of constant in
3919 RTL. The argument MODE is redundant except in the case of a `const_int'
3920 rtx. Select the section by calling `text_section' or one of the
3921 alternatives for other sections.
3923 Do not define this macro if you put all constants in the read-only data
3926 Defined in svr4.h. */
3927 /* #define SELECT_RTX_SECTION(MODE, RTX) */
3929 /* Define this macro if jump tables (for `tablejump' insns) should be output in
3930 the text section, along with the assembler instructions. Otherwise, the
3931 readonly data section is used.
3933 This macro is irrelevant if there is no separate readonly data section. */
3934 /* #define JUMP_TABLES_IN_TEXT_SECTION */
3936 /* Define this macro if references to a symbol must be treated differently
3937 depending on something about the variable or function named by the symbol
3938 (such as what section it is in).
3940 The macro definition, if any, is executed immediately after the rtl for DECL
3941 has been created and stored in `DECL_RTL (DECL)'. The value of the rtl will
3942 be a `mem' whose address is a `symbol_ref'.
3944 The usual thing for this macro to do is to record a flag in the `symbol_ref'
3945 (such as `SYMBOL_REF_FLAG') or to store a modified name string in the
3946 `symbol_ref' (if one bit is not enough information). */
3947 /* #define ENCODE_SECTION_INFO(DECL) */
3949 /* Decode SYM_NAME and store the real name part in VAR, sans the characters
3950 that encode section info. Define this macro if `ENCODE_SECTION_INFO' alters
3951 the symbol's name string. */
3952 /* #define STRIP_NAME_ENCODING(VAR, SYM_NAME) */
3954 /* A C expression which evaluates to true if DECL should be placed
3955 into a unique section for some target-specific reason. If you do
3956 not define this macro, the default is `0'. Note that the flag
3957 `-ffunction-sections' will also cause functions to be placed into
3960 Defined in svr4.h. */
3961 /* #define UNIQUE_SECTION_P(DECL) */
3963 /* A C statement to build up a unique section name, expressed as a
3964 STRING_CST node, and assign it to `DECL_SECTION_NAME (DECL)'.
3965 RELOC indicates whether the initial value of EXP requires
3966 link-time relocations. If you do not define this macro, GNU CC
3967 will use the symbol name prefixed by `.' as the section name.
3969 Defined in svr4.h. */
3970 /* #define UNIQUE_SECTION(DECL, RELOC) */
3973 /* Position Independent Code. */
3975 /* The register number of the register used to address a table of static data
3976 addresses in memory. In some cases this register is defined by a
3977 processor's "application binary interface" (ABI). When this macro is
3978 defined, RTL is generated for this register once, as with the stack pointer
3979 and frame pointer registers. If this macro is not defined, it is up to the
3980 machine-dependent files to allocate such a register (if necessary). */
3981 /* #define PIC_OFFSET_TABLE_REGNUM */
3983 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
3984 clobbered by calls. Do not define this macro if `PIC_OFFSET_TABLE_REGNUM'
3986 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */
3988 /* By generating position-independent code, when two different programs (A and
3989 B) share a common library (libC.a), the text of the library can be shared
3990 whether or not the library is linked at the same address for both programs.
3991 In some of these environments, position-independent code requires not only
3992 the use of different addressing modes, but also special code to enable the
3993 use of these addressing modes.
3995 The `FINALIZE_PIC' macro serves as a hook to emit these special codes once
3996 the function is being compiled into assembly code, but not before. (It is
3997 not done before, because in the case of compiling an inline function, it
3998 would lead to multiple PIC prologues being included in functions which used
3999 inline functions and were compiled to assembly language.) */
4000 /* #define FINALIZE_PIC */
4002 /* A C expression that is nonzero if X is a legitimate immediate operand on the
4003 target machine when generating position independent code. You can assume
4004 that X satisfies `CONSTANT_P', so you need not check this. You can also
4005 assume FLAG_PIC is true, so you need not check it either. You need not
4006 define this macro if all constants (including `SYMBOL_REF') can be immediate
4007 operands when generating position independent code. */
4008 /* #define LEGITIMATE_PIC_OPERAND_P(X) */
4011 /* The Overall Framework of an Assembler File. */
4013 /* A C expression which outputs to the stdio stream STREAM some appropriate
4014 text to go at the start of an assembler file.
4016 Normally this macro is defined to output a line containing `#NO_APP', which
4017 is a comment that has no effect on most assemblers but tells the GNU
4018 assembler that it can save time by not checking for certain assembler
4021 On systems that use SDB, it is necessary to output certain commands; see
4024 Defined in svr4.h. */
4026 /* #define ASM_FILE_START(STREAM) \
4027 output_file_directive ((STREAM), main_input_filename) */
4029 /* A C expression which outputs to the stdio stream STREAM some appropriate
4030 text to go at the end of an assembler file.
4032 If this macro is not defined, the default is to output nothing special at
4033 the end of the file. Most systems don't require any definition.
4035 On systems that use SDB, it is necessary to output certain commands; see
4038 Defined in svr4.h. */
4039 /* #define ASM_FILE_END(STREAM) */
4041 /* A C statement to output assembler commands which will identify the object
4042 file as having been compiled with GNU CC (or another GNU compiler).
4044 If you don't define this macro, the string `gcc_compiled.:' is output. This
4045 string is calculated to define a symbol which, on BSD systems, will never be
4046 defined for any other reason. GDB checks for the presence of this symbol
4047 when reading the symbol table of an executable.
4049 On non-BSD systems, you must arrange communication with GDB in some other
4050 fashion. If GDB is not used on your system, you can define this macro with
4053 Defined in svr4.h. */
4054 /* #define ASM_IDENTIFY_GCC(FILE) */
4056 /* Like ASM_IDENTIFY_GCC, but used when dbx debugging is selected to emit
4057 a stab the debugger uses to identify gcc as the compiler that is emitted
4058 after the stabs for the filename, which makes it easier for GDB to parse.
4060 Defined in svr4.h. */
4061 /* #define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE) */
4063 /* A C string constant describing how to begin a comment in the target
4064 assembler language. The compiler assumes that the comment will end at the
4066 #define ASM_COMMENT_START ";"
4068 /* A C string constant for text to be output before each `asm' statement or
4069 group of consecutive ones. Normally this is `"#APP"', which is a comment
4070 that has no effect on most assemblers but tells the GNU assembler that it
4071 must check the lines that follow for all valid assembler constructs. */
4072 #define ASM_APP_ON "#APP\n"
4074 /* A C string constant for text to be output after each `asm' statement or
4075 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
4076 GNU assembler to resume making the time-saving assumptions that are valid
4077 for ordinary compiler output. */
4078 #define ASM_APP_OFF "#NO_APP\n"
4080 /* A C statement to output COFF information or DWARF debugging information
4081 which indicates that filename NAME is the current source file to the stdio
4084 This macro need not be defined if the standard form of output for the file
4085 format in use is appropriate. */
4086 /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
4088 /* A C statement to output DBX or SDB debugging information before code for
4089 line number LINE of the current source file to the stdio stream STREAM.
4091 This macro need not be defined if the standard form of debugging information
4092 for the debugger in use is appropriate.
4094 Defined in svr4.h. */
4095 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */
4097 /* A C statement to output something to the assembler file to handle a `#ident'
4098 directive containing the text STRING. If this macro is not defined, nothing
4099 is output for a `#ident' directive.
4101 Defined in svr4.h. */
4102 /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */
4104 /* A C statement to output something to the assembler file to switch to section
4105 NAME for object DECL which is either a `FUNCTION_DECL', a `VAR_DECL' or
4106 `NULL_TREE'. Some target formats do not support arbitrary sections. Do not
4107 define this macro in such cases.
4109 At present this macro is only used to support section attributes. When this
4110 macro is undefined, section attributes are disabled.
4112 Defined in svr4.h. */
4113 /* #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME) */
4115 /* A C statement to output any assembler statements which are required to
4116 precede any Objective C object definitions or message sending. The
4117 statement is executed only when compiling an Objective C program. */
4118 /* #define OBJC_PROLOGUE */
4121 /* Output of Data. */
4123 /* A C statement to output to the stdio stream STREAM an assembler instruction
4124 to assemble a floating-point constant of `TFmode', `DFmode', `SFmode',
4125 `TQFmode', `HFmode', or `QFmode', respectively, whose value is VALUE. VALUE
4126 will be a C expression of type `REAL_VALUE_TYPE'. Macros such as
4127 `REAL_VALUE_TO_TARGET_DOUBLE' are useful for writing these definitions. */
4129 /* #define ASM_OUTPUT_LONG_DOUBLE(STREAM, VALUE) */
4131 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
4133 if (REAL_VALUE_ISINF (VALUE) \
4134 || REAL_VALUE_ISNAN (VALUE) \
4135 || REAL_VALUE_MINUS_ZERO (VALUE)) \
4138 REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \
4139 fprintf (FILE, "\t.long 0x%lx\n\t.long 0x%lx\n", \
4140 t[0] & 0xffffffff, t[1] & 0xffffffff); \
4145 REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", str); \
4146 fprintf (FILE, "\t.double 0d%s\n", str); \
4150 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
4152 if (REAL_VALUE_ISINF (VALUE) \
4153 || REAL_VALUE_ISNAN (VALUE) \
4154 || REAL_VALUE_MINUS_ZERO (VALUE)) \
4157 REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
4158 fprintf (FILE, "\t.long 0x%lx\n", t & 0xffffffff); \
4163 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \
4164 fprintf (FILE, "\t.float 0d%s\n", str); \
4168 /* #define ASM_OUTPUT_THREE_QUARTER_FLOAT(STREAM, VALUE) */
4169 /* #define ASM_OUTPUT_SHORT_FLOAT(STREAM, VALUE) */
4170 /* #define ASM_OUTPUT_BYTE_FLOAT(STREAM, VALUE) */
4172 /* A C statement to output to the stdio stream STREAM an assembler instruction
4173 to assemble an integer of 16, 8, 4, 2 or 1 bytes, respectively, whose value
4174 is VALUE. The argument EXP will be an RTL expression which represents a
4175 constant value. Use `output_addr_const (STREAM, EXP)' to output this value
4176 as an assembler expression.
4178 For sizes larger than `UNITS_PER_WORD', if the action of a macro would be
4179 identical to repeatedly calling the macro corresponding to a size of
4180 `UNITS_PER_WORD', once for each word, you need not define the macro. */
4182 /* #define ASM_OUTPUT_QUADRUPLE_INT(STREAM, EXP) */
4183 /* #define ASM_OUTPUT_DOUBLE_INT(STREAM, EXP) */
4185 #define ASM_OUTPUT_INT(STREAM, EXP) \
4187 fputs ("\t.word ", STREAM); \
4188 output_addr_const (STREAM, EXP); \
4189 putc ('\n', STREAM); \
4192 #define ASM_OUTPUT_SHORT(STREAM, EXP) \
4194 fputs ("\t.hword ", STREAM); \
4195 output_addr_const (STREAM, EXP); \
4196 putc ('\n', STREAM); \
4199 #define ASM_OUTPUT_CHAR(STREAM, EXP) \
4201 fputs ("\t.byte ", STREAM); \
4202 output_addr_const (STREAM, EXP); \
4203 putc ('\n', STREAM); \
4206 /* A C statement to output to the stdio stream STREAM an assembler instruction
4207 to assemble a single byte containing the number VALUE. */
4209 #define ASM_OUTPUT_BYTE(STREAM, VALUE) \
4210 fprintf (STREAM, "%s%d\n", ASM_BYTE_OP, (int)(VALUE))
4212 /* A C string constant giving the pseudo-op to use for a sequence of
4213 single-byte constants. If this macro is not defined, the default
4216 Defined in svr4.h. */
4217 /* #define ASM_BYTE_OP */
4219 /* A C statement to output to the stdio stream STREAM an assembler instruction
4220 to assemble a string constant containing the LEN bytes at PTR. PTR will be
4221 a C expression of type `char *' and LEN a C expression of type `int'.
4223 If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix
4224 assembler, do not define the macro `ASM_OUTPUT_ASCII'.
4226 Defined in svr4.h. */
4227 /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */
4229 /* You may define this macro as a C expression. You should define the
4230 expression to have a non-zero value if GNU CC should output the
4231 constant pool for a function before the code for the function, or
4232 a zero value if GNU CC should output the constant pool after the
4233 function. If you do not define this macro, the usual case, GNU CC
4234 will output the constant pool before the function. */
4235 /* #define CONSTANT_POOL_BEFORE_FUNCTION */
4237 /* A C statement to output assembler commands to define the start of the
4238 constant pool for a function. FUNNAME is a string giving the name of the
4239 function. Should the return type of the function be required, it can be
4240 obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that
4241 will be written immediately after this call.
4243 If no constant-pool prefix is required, the usual case, this macro need not
4245 /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */
4247 /* A C statement (with or without semicolon) to output a constant in the
4248 constant pool, if it needs special treatment. (This macro need not do
4249 anything for RTL expressions that can be output normally.)
4251 The argument FILE is the standard I/O stream to output the assembler code
4252 on. X is the RTL expression for the constant to output, and MODE is the
4253 machine mode (in case X is a `const_int'). ALIGN is the required alignment
4254 for the value X; you should output an assembler directive to force this much
4257 The argument LABELNO is a number to use in an internal label for the address
4258 of this pool entry. The definition of this macro is responsible for
4259 outputting the label definition at the proper place. Here is how to do
4262 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO);
4264 When you output a pool entry specially, you should end with a `goto' to the
4265 label JUMPTO. This will prevent the same pool entry from being output a
4266 second time in the usual manner.
4268 You need not define this macro if it would do nothing. */
4269 /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */
4271 /* Define this macro as a C expression which is nonzero if the constant EXP, of
4272 type `tree', should be output after the code for a function. The compiler
4273 will normally output all constants before the function; you need not define
4274 this macro if this is OK. */
4275 /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */
4277 /* A C statement to output assembler commands to at the end of the constant
4278 pool for a function. FUNNAME is a string giving the name of the function.
4279 Should the return type of the function be required, you can obtain it via
4280 FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote
4281 immediately before this call.
4283 If no constant-pool epilogue is required, the usual case, you need not
4284 define this macro. */
4285 /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */
4287 /* Define this macro as a C expression which is nonzero if C is used as a
4288 logical line separator by the assembler.
4290 If you do not define this macro, the default is that only the character `;'
4291 is treated as a logical line separator. */
4292 /* #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) */
4294 /* These macros are defined as C string constant, describing the syntax in the
4295 assembler for grouping arithmetic expressions. The following definitions
4296 are correct for most assemblers:
4298 #define ASM_OPEN_PAREN "("
4299 #define ASM_CLOSE_PAREN ")" */
4300 #define ASM_OPEN_PAREN "("
4301 #define ASM_CLOSE_PAREN ")"
4303 /* These macros are provided by `real.h' for writing the definitions of
4304 `ASM_OUTPUT_DOUBLE' and the like: */
4306 /* These translate X, of type `REAL_VALUE_TYPE', to the target's floating point
4307 representation, and store its bit pattern in the array of `long int' whose
4308 address is L. The number of elements in the output array is determined by
4309 the size of the desired target floating point data type: 32 bits of it go in
4310 each `long int' array element. Each array element holds 32 bits of the
4311 result, even if `long int' is wider than 32 bits on the host machine.
4313 The array element values are designed so that you can print them out using
4314 `fprintf' in the order they should appear in the target machine's memory. */
4315 /* #define REAL_VALUE_TO_TARGET_SINGLE(X, L) */
4316 /* #define REAL_VALUE_TO_TARGET_DOUBLE(X, L) */
4317 /* #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(X, L) */
4319 /* This macro converts X, of type `REAL_VALUE_TYPE', to a decimal number and
4320 stores it as a string into STRING. You must pass, as STRING, the address of
4321 a long enough block of space to hold the result.
4323 The argument FORMAT is a `printf'-specification that serves as a suggestion
4324 for how to format the output string. */
4325 /* #define REAL_VALUE_TO_DECIMAL(X, FORMAT, STRING) */
4328 /* Output of Uninitialized Variables. */
4330 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4331 assembler definition of a common-label named NAME whose size is SIZE bytes.
4332 The variable ROUNDED is the size rounded up to whatever alignment the caller
4335 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
4336 before and after that, output the additional assembler syntax for defining
4337 the name, and a newline.
4339 This macro controls how the assembler definitions of uninitialized global
4340 variables are output. */
4341 /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */
4343 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate,
4344 explicit argument. If you define this macro, it is used in place of
4345 `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required
4346 alignment of the variable. The alignment is specified as the number of
4349 Defined in svr4.h. */
4350 /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */
4352 /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument -
4353 the DECL of the variable to be output, if there is one. This macro can be
4354 called with DECL == NULL_TREE. If you define this macro, it is used in
4355 place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you
4356 more flexibility in handling the destination of the variable. */
4357 /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4359 /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used
4360 when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */
4361 /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */
4363 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4364 assembler definition of uninitialized global DECL named NAME whose size is
4365 SIZE bytes. The variable ROUNDED is the size rounded up to whatever
4366 alignment the caller wants.
4368 Try to use function `asm_output_bss' defined in `varasm.c' when defining
4369 this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to
4370 output the name itself; before and after that, output the additional
4371 assembler syntax for defining the name, and a newline.
4373 This macro controls how the assembler definitions of uninitialized global
4374 variables are output. This macro exists to properly support languages like
4375 `c++' which do not have `common' data. However, this macro currently is not
4376 defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not
4377 defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or
4378 `ASM_OUTPUT_DECL_COMMON' is used. */
4379 /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
4381 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate,
4382 explicit argument. If you define this macro, it is used in place of
4383 `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required
4384 alignment of the variable. The alignment is specified as the number of
4387 Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when
4388 defining this macro. */
4389 /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4391 /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when
4392 NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */
4393 /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
4395 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4396 assembler definition of a local-common-label named NAME whose size is SIZE
4397 bytes. The variable ROUNDED is the size rounded up to whatever alignment
4400 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
4401 before and after that, output the additional assembler syntax for defining
4402 the name, and a newline.
4404 This macro controls how the assembler definitions of uninitialized static
4405 variables are output. */
4406 /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */
4408 /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate,
4409 explicit argument. If you define this macro, it is used in place of
4410 `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required
4411 alignment of the variable. The alignment is specified as the number of
4414 Defined in svr4.h. */
4415 /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */
4417 /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional
4418 parameter - the DECL of variable to be output, if there is one.
4419 This macro can be called with DECL == NULL_TREE. If you define
4420 this macro, it is used in place of `ASM_OUTPUT_LOCAL' and
4421 `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in
4422 handling the destination of the variable. */
4423 /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4425 /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when
4426 NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */
4427 /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */
4430 /* Output and Generation of Labels. */
4432 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4433 assembler definition of a label named NAME. Use the expression
4434 `assemble_name (STREAM, NAME)' to output the name itself; before and after
4435 that, output the additional assembler syntax for defining the name, and a
4438 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
4440 assemble_name (STREAM, NAME); \
4441 fputs (":\n", STREAM); \
4444 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4445 necessary for declaring the name NAME of a function which is being defined.
4446 This macro is responsible for outputting the label definition (perhaps using
4447 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node
4448 representing the function.
4450 If this macro is not defined, then the function name is defined in the usual
4451 manner as a label (by means of `ASM_OUTPUT_LABEL').
4453 Defined in svr4.h. */
4454 /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */
4456 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4457 necessary for declaring the size of a function which is being defined. The
4458 argument NAME is the name of the function. The argument DECL is the
4459 `FUNCTION_DECL' tree node representing the function.
4461 If this macro is not defined, then the function size is not defined.
4463 Defined in svr4.h. */
4464 /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */
4466 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4467 necessary for declaring the name NAME of an initialized variable which is
4468 being defined. This macro must output the label definition (perhaps using
4469 `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node
4470 representing the variable.
4472 If this macro is not defined, then the variable name is defined in the usual
4473 manner as a label (by means of `ASM_OUTPUT_LABEL').
4475 Defined in svr4.h. */
4476 /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */
4478 /* A C statement (sans semicolon) to finish up declaring a variable name once
4479 the compiler has processed its initializer fully and thus has had a chance
4480 to determine the size of an array when controlled by an initializer. This
4481 is used on systems where it's necessary to declare something about the size
4484 If you don't define this macro, that is equivalent to defining it to do
4487 Defined in svr4.h. */
4488 /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */
4490 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4491 commands that will make the label NAME global; that is, available for
4492 reference from other files. Use the expression `assemble_name (STREAM,
4493 NAME)' to output the name itself; before and after that, output the
4494 additional assembler syntax for making that name global, and a newline. */
4496 #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \
4498 fputs ("\t.globl ", STREAM); \
4499 assemble_name (STREAM, NAME); \
4500 fputs ("\n", STREAM); \
4503 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4504 commands that will make the label NAME weak; that is, available for
4505 reference from other files but only used if no other definition is
4506 available. Use the expression `assemble_name (STREAM, NAME)' to output the
4507 name itself; before and after that, output the additional assembler syntax
4508 for making that name weak, and a newline.
4510 If you don't define this macro, GNU CC will not support weak symbols and you
4511 should not define the `SUPPORTS_WEAK' macro.
4513 Defined in svr4.h. */
4514 /* #define ASM_WEAKEN_LABEL */
4516 /* A C expression which evaluates to true if the target supports weak symbols.
4518 If you don't define this macro, `defaults.h' provides a default definition.
4519 If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise,
4520 it is `0'. Define this macro if you want to control weak symbol support
4521 with a compiler flag such as `-melf'. */
4522 /* #define SUPPORTS_WEAK */
4524 /* A C statement (sans semicolon) to mark DECL to be emitted as a
4525 public symbol such that extra copies in multiple translation units
4526 will be discarded by the linker. Define this macro if your object
4527 file format provides support for this concept, such as the `COMDAT'
4528 section flags in the Microsoft Windows PE/COFF format, and this
4529 support requires changes to DECL, such as putting it in a separate
4532 Defined in svr4.h. */
4533 /* #define MAKE_DECL_ONE_ONLY */
4535 /* A C expression which evaluates to true if the target supports one-only
4538 If you don't define this macro, `varasm.c' provides a default definition.
4539 If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1';
4540 otherwise, it is `0'. Define this macro if you want to control one-only
4541 symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag
4542 is enough to mark a declaration to be emitted as one-only. */
4543 /* #define SUPPORTS_ONE_ONLY */
4545 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4546 necessary for declaring the name of an external symbol named NAME which is
4547 referenced in this compilation but not defined. The value of DECL is the
4548 tree node for the declaration.
4550 This macro need not be defined if it does not need to output anything. The
4551 GNU assembler and most Unix assemblers don't require anything. */
4552 /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */
4554 /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to
4555 declare a library function name external. The name of the library function
4556 is given by SYMREF, which has type `rtx' and is a `symbol_ref'.
4558 This macro need not be defined if it does not need to output anything. The
4559 GNU assembler and most Unix assemblers don't require anything.
4561 Defined in svr4.h. */
4562 /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */
4564 /* A C statement (sans semicolon) to output to the stdio stream STREAM a
4565 reference in assembler syntax to a label named NAME. This should add `_' to
4566 the front of the name, if that is customary on your operating system, as it
4567 is in most Berkeley Unix systems. This macro is used in `assemble_name'. */
4568 /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */
4570 /* A C statement to output to the stdio stream STREAM a label whose name is
4571 made from the string PREFIX and the number NUM.
4573 It is absolutely essential that these labels be distinct from the labels
4574 used for user-level functions and variables. Otherwise, certain programs
4575 will have name conflicts with internal labels.
4577 It is desirable to exclude internal labels from the symbol table of the
4578 object file. Most assemblers have a naming convention for labels that
4579 should be excluded; on many systems, the letter `L' at the beginning of a
4580 label has this effect. You should find out what convention your system
4581 uses, and follow it.
4583 The usual definition of this macro is as follows:
4585 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM)
4587 Defined in svr4.h. */
4588 /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */
4590 /* A C statement to store into the string STRING a label whose name is made
4591 from the string PREFIX and the number NUM.
4593 This string, when output subsequently by `assemble_name', should produce the
4594 output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX
4597 If the string begins with `*', then `assemble_name' will output the rest of
4598 the string unchanged. It is often convenient for
4599 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't
4600 start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and
4601 may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your
4602 machine description, so you should know what it does on your machine.)
4604 Defined in svr4.h. */
4607 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
4609 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
4613 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
4614 newly allocated string made from the string NAME and the number NUMBER, with
4615 some suitable punctuation added. Use `alloca' to get space for the string.
4617 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
4618 an assembler label for an internal static variable whose name is NAME.
4619 Therefore, the string must be such as to result in valid assembler code.
4620 The argument NUMBER is different each time this macro is executed; it
4621 prevents conflicts between similarly-named internal static variables in
4624 Ideally this string should not be a valid C identifier, to prevent any
4625 conflict with the user's own symbols. Most assemblers allow periods or
4626 percent signs in assembler symbols; putting at least one of these between
4627 the name and the number will suffice. */
4629 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
4631 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
4632 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
4635 /* A C statement to output to the stdio stream STREAM assembler code which
4636 defines (equates) the symbol NAME to have the value VALUE.
4638 If SET_ASM_OP is defined, a default definition is provided which is correct
4641 Defined in svr4.h. */
4642 /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */
4644 /* A C statement to output to the stdio stream STREAM assembler code which
4645 defines (equates) the weak symbol NAME to have the value VALUE.
4647 Define this macro if the target only supports weak aliases; define
4648 ASM_OUTPUT_DEF instead if possible. */
4649 /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */
4651 /* Define this macro to override the default assembler names used for Objective
4654 The default name is a unique method number followed by the name of the class
4655 (e.g. `_1_Foo'). For methods in categories, the name of the category is
4656 also included in the assembler name (e.g. `_1_Foo_Bar').
4658 These names are safe on most systems, but make debugging difficult since the
4659 method's selector is not present in the name. Therefore, particular systems
4660 define other ways of computing names.
4662 BUF is an expression of type `char *' which gives you a buffer in which to
4663 store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME
4664 put together, plus 50 characters extra.
4666 The argument IS_INST specifies whether the method is an instance method or a
4667 class method; CLASS_NAME is the name of the class; CAT_NAME is the name of
4668 the category (or NULL if the method is not in a category); and SEL_NAME is
4669 the name of the selector.
4671 On systems where the assembler can handle quoted names, you can use this
4672 macro to provide more human-readable names. */
4673 /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */
4676 /* Macros Controlling Initialization Routines. */
4678 /* If defined, a C string constant for the assembler operation to identify the
4679 following data as initialization code. If not defined, GNU CC will assume
4680 such a section does not exist. When you are using special sections for
4681 initialization and termination functions, this macro also controls how
4682 `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions.
4684 Defined in svr4.h. */
4685 /* #define INIT_SECTION_ASM_OP */
4686 #undef INIT_SECTION_ASM_OP
4688 /* If defined, `main' will not call `__main' as described above. This macro
4689 should be defined for systems that control the contents of the init section
4690 on a symbol-by-symbol basis, such as OSF/1, and should not be defined
4691 explicitly for systems that support `INIT_SECTION_ASM_OP'. */
4692 /* #define HAS_INIT_SECTION */
4694 /* If defined, a C string constant for a switch that tells the linker that the
4695 following symbol is an initialization routine. */
4696 /* #define LD_INIT_SWITCH */
4698 /* If defined, a C string constant for a switch that tells the linker that the
4699 following symbol is a finalization routine. */
4700 /* #define LD_FINI_SWITCH */
4702 /* If defined, `main' will call `__main' despite the presence of
4703 `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the
4704 init section is not actually run automatically, but is still useful for
4705 collecting the lists of constructors and destructors. */
4706 #define INVOKE__main
4708 /* Define this macro as a C statement to output on the stream STREAM the
4709 assembler code to arrange to call the function named NAME at initialization
4712 Assume that NAME is the name of a C function generated automatically by the
4713 compiler. This function takes no arguments. Use the function
4714 `assemble_name' to output the name NAME; this performs any system-specific
4715 syntactic transformations such as adding an underscore.
4717 If you don't define this macro, nothing special is output to arrange to call
4718 the function. This is correct when the function will be called in some
4719 other manner--for example, by means of the `collect2' program, which looks
4720 through the symbol table to find these functions by their names.
4722 Defined in svr4.h. */
4723 /* #define ASM_OUTPUT_CONSTRUCTOR(STREAM, NAME) */
4725 /* This is like `ASM_OUTPUT_CONSTRUCTOR' but used for termination functions
4726 rather than initialization functions.
4728 Defined in svr4.h. */
4729 /* #define ASM_OUTPUT_DESTRUCTOR(STREAM, NAME) */
4731 /* If your system uses `collect2' as the means of processing constructors, then
4732 that program normally uses `nm' to scan an object file for constructor
4733 functions to be called. On certain kinds of systems, you can define these
4734 macros to make `collect2' work faster (and, in some cases, make it work at
4737 /* Define this macro if the system uses COFF (Common Object File Format) object
4738 files, so that `collect2' can assume this format and scan object files
4739 directly for dynamic constructor/destructor functions. */
4740 /* #define OBJECT_FORMAT_COFF */
4742 /* Define this macro if the system uses ROSE format object files, so that
4743 `collect2' can assume this format and scan object files directly for dynamic
4744 constructor/destructor functions.
4746 These macros are effective only in a native compiler; `collect2' as
4747 part of a cross compiler always uses `nm' for the target machine. */
4748 /* #define OBJECT_FORMAT_ROSE */
4750 /* Define this macro if the system uses ELF format object files.
4752 Defined in svr4.h. */
4753 /* #define OBJECT_FORMAT_ELF */
4755 /* Define this macro as a C string constant containing the file name to use to
4756 execute `nm'. The default is to search the path normally for `nm'.
4758 If your system supports shared libraries and has a program to list the
4759 dynamic dependencies of a given library or executable, you can define these
4760 macros to enable support for running initialization and termination
4761 functions in shared libraries: */
4762 /* #define REAL_NM_FILE_NAME */
4764 /* Define this macro to a C string constant containing the name of the program
4765 which lists dynamic dependencies, like `"ldd"' under SunOS 4. */
4766 /* #define LDD_SUFFIX */
4768 /* Define this macro to be C code that extracts filenames from the output of
4769 the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *'
4770 that points to the beginning of a line of output from `LDD_SUFFIX'. If the
4771 line lists a dynamic dependency, the code must advance PTR to the beginning
4772 of the filename on that line. Otherwise, it must set PTR to `NULL'. */
4773 /* #define PARSE_LDD_OUTPUT (PTR) */
4776 /* Output of Assembler Instructions. */
4778 /* A C initializer containing the assembler's names for the machine registers,
4779 each one as a C string constant. This is what translates register numbers
4780 in the compiler into assembler language. */
4781 #define REGISTER_NAMES \
4783 "r0", "r1", "r2", "r3", \
4784 "r4", "r5", "r6", "r7", \
4785 "r8", "r9", "r10", "r11", \
4786 "r12", "r13", "r14", "r15", \
4787 "r16", "r17", "r18", "r19", \
4788 "r20", "r21", "r22", "r23", \
4789 "r24", "r25", "r26", "r27", \
4790 "r28", "r29", "r30", "r31", \
4791 "r32", "r33", "r34", "r35", \
4792 "r36", "r37", "r38", "r39", \
4793 "r40", "r41", "r42", "r43", \
4794 "r44", "r45", "r46", "r47", \
4795 "r48", "r49", "r50", "r51", \
4796 "r52", "r53", "r54", "r55", \
4797 "r56", "r57", "r58", "r59", \
4798 "r60", "r61", "link", "sp", \
4800 "f0", "f1", "f2", "f3", \
4801 "s", "v", "va", "c", \
4803 "psw", "bpsw", "pc", "bpc", \
4804 "dpsw", "dpc", "rpt_c", "rpt_s", \
4805 "rpt_e", "mod_s", "mod_e", "iba", \
4806 "eit_vb", "int_s", "int_m", \
4809 /* If defined, a C initializer for an array of structures containing a name and
4810 a register number. This macro defines additional names for hard registers,
4811 thus allowing the `asm' option in declarations to refer to registers using
4813 #define ADDITIONAL_REGISTER_NAMES \
4815 {"r62", GPR_LINK}, \
4818 {"f5", FLAG_OVERFLOW}, \
4819 {"f6", FLAG_ACC_OVER}, \
4820 {"f7", FLAG_CARRY}, \
4821 {"carry", FLAG_CARRY}, \
4822 {"borrow", FLAG_BORROW}, \
4823 {"b", FLAG_BORROW}, \
4830 {"cr7", CR_RPT_C}, \
4831 {"cr8", CR_RPT_S}, \
4832 {"cr9", CR_RPT_E}, \
4833 {"cr10", CR_MOD_S}, \
4834 {"cr11", CR_MOD_E}, \
4836 {"cr15", CR_EIT_VB}, \
4837 {"cr16", CR_INT_S}, \
4838 {"cr17", CR_INT_M} \
4841 /* Define this macro if you are using an unusual assembler that requires
4842 different names for the machine instructions.
4844 The definition is a C statement or statements which output an assembler
4845 instruction opcode to the stdio stream STREAM. The macro-operand PTR is a
4846 variable of type `char *' which points to the opcode name in its "internal"
4847 form--the form that is written in the machine description. The definition
4848 should output the opcode name to STREAM, performing any translation you
4849 desire, and increment the variable PTR to point at the end of the opcode so
4850 that it will not be output twice.
4852 In fact, your macro definition may process less than the entire opcode name,
4853 or more than the opcode name; but if you want to process text that includes
4854 `%'-sequences to substitute operands, you must take care of the substitution
4855 yourself. Just be sure to increment PTR over whatever text should not be
4858 If you need to look at the operand values, they can be found as the elements
4859 of `recog_data.operand'.
4861 If the macro definition does nothing, the instruction is output in the usual
4863 /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */
4865 /* If defined, a C statement to be executed just prior to the output of
4866 assembler code for INSN, to modify the extracted operands so they will be
4869 Here the argument OPVEC is the vector containing the operands extracted from
4870 INSN, and NOPERANDS is the number of elements of the vector which contain
4871 meaningful data for this insn. The contents of this vector are what will be
4872 used to convert the insn template into assembler code, so you can change the
4873 assembler output by changing the contents of the vector.
4875 This macro is useful when various assembler syntaxes share a single file of
4876 instruction patterns; by defining this macro differently, you can cause a
4877 large class of instructions to be output differently (such as with
4878 rearranged operands). Naturally, variations in assembler syntax affecting
4879 individual insn patterns ought to be handled by writing conditional output
4880 routines in those patterns.
4882 If this macro is not defined, it is equivalent to a null statement. */
4883 /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */
4885 /* If defined, `FINAL_PRESCAN_INSN' will be called on each
4886 `CODE_LABEL'. In that case, OPVEC will be a null pointer and
4887 NOPERANDS will be zero. */
4888 /* #define FINAL_PRESCAN_LABEL */
4890 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4891 for an instruction operand X. X is an RTL expression.
4893 CODE is a value that can be used to specify one of several ways of printing
4894 the operand. It is used when identical operands must be printed differently
4895 depending on the context. CODE comes from the `%' specification that was
4896 used to request printing of the operand. If the specification was just
4897 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
4898 the ASCII code for LTR.
4900 If X is a register, this macro should print the register's name. The names
4901 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
4902 is initialized from `REGISTER_NAMES'.
4904 When the machine description has a specification `%PUNCT' (a `%' followed by
4905 a punctuation character), this macro is called with a null pointer for X and
4906 the punctuation character for CODE.
4908 Standard operand flags that are handled elsewhere:
4909 `=' Output a number unique to each instruction in the compilation.
4910 `a' Substitute an operand as if it were a memory reference.
4911 `c' Omit the syntax that indicates an immediate operand.
4912 `l' Substitute a LABEL_REF into a jump instruction.
4913 `n' Like %cDIGIT, except negate the value before printing.
4915 The d30v specific operand flags are:
4917 `f' Print a SF constant as an int.
4918 `s' Subtract 32 and negate.
4919 `A' Print accumulator number without an `a' in front of it.
4920 `B' Print bit offset for BSET, etc. instructions.
4921 `E' Print u if this is zero extend, nothing if this is sign extend.
4922 `F' Emit /{f,t,x}{f,t,x} for executing a false condition.
4923 `L' Print the lower half of a 64 bit item.
4924 `M' Print a memory reference for ld/st instructions.
4925 `R' Return appropriate cmp instruction for relational test.
4927 `T' Emit /{f,t,x}{f,t,x} for executing a true condition.
4928 `U' Print the upper half of a 64 bit item. */
4930 #define PRINT_OPERAND(STREAM, X, CODE) d30v_print_operand (STREAM, X, CODE)
4932 /* A C expression which evaluates to true if CODE is a valid punctuation
4933 character for use in the `PRINT_OPERAND' macro. If
4934 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
4935 characters (except for the standard one, `%') are used in this way. */
4937 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.' || (CODE) == ':')
4939 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4940 for an instruction operand that is a memory reference whose address is X. X
4941 is an RTL expression.
4943 On some machines, the syntax for a symbolic address depends on the section
4944 that the address refers to. On these machines, define the macro
4945 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
4946 then check for it here. *Note Assembler Format::. */
4948 #define PRINT_OPERAND_ADDRESS(STREAM, X) d30v_print_operand_address (STREAM, X)
4950 /* A C statement, to be executed after all slot-filler instructions have been
4951 output. If necessary, call `dbr_sequence_length' to determine the number of
4952 slots filled in a sequence (zero if not currently outputting a sequence), to
4953 decide how many no-ops to output, or whatever.
4955 Don't define this macro if it has nothing to do, but it is helpful in
4956 reading assembly output if the extent of the delay sequence is made explicit
4957 (e.g. with white space).
4959 Note that output routines for instructions with delay slots must be prepared
4960 to deal with not being output as part of a sequence (i.e. when the
4961 scheduling pass is not run, or when no slot fillers could be found.) The
4962 variable `final_sequence' is null when not processing a sequence, otherwise
4963 it contains the `sequence' rtx being output. */
4964 /* #define DBR_OUTPUT_SEQEND(FILE) */
4966 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
4967 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
4968 single `md' file must support multiple assembler formats. In that case, the
4969 various `tm.h' files can define these macros differently.
4971 USER_LABEL_PREFIX is defined in svr4.h. */
4973 #define REGISTER_PREFIX "%"
4974 #define LOCAL_LABEL_PREFIX "."
4975 #define USER_LABEL_PREFIX ""
4976 #define IMMEDIATE_PREFIX ""
4978 /* If your target supports multiple dialects of assembler language (such as
4979 different opcodes), define this macro as a C expression that gives the
4980 numeric index of the assembler language dialect to use, with zero as the
4983 If this macro is defined, you may use `{option0|option1|option2...}'
4984 constructs in the output templates of patterns (*note Output Template::.) or
4985 in the first argument of `asm_fprintf'. This construct outputs `option0',
4986 `option1' or `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero,
4987 one or two, etc. Any special characters within these strings retain their
4990 If you do not define this macro, the characters `{', `|' and `}' do not have
4991 any special meaning when used in templates or operands to `asm_fprintf'.
4993 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
4994 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations
4995 in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT'
4996 and use the `{option0|option1}' syntax if the syntax variant are larger and
4997 involve such things as different opcodes or operand order. */
4998 /* #define ASSEMBLER_DIALECT */
5000 /* A C expression to output to STREAM some assembler code which will push hard
5001 register number REGNO onto the stack. The code need not be optimal, since
5002 this macro is used only when profiling. */
5003 /* #define ASM_OUTPUT_REG_PUSH (STREAM, REGNO) */
5005 /* A C expression to output to STREAM some assembler code which will pop hard
5006 register number REGNO off of the stack. The code need not be optimal, since
5007 this macro is used only when profiling. */
5008 /* #define ASM_OUTPUT_REG_POP (STREAM, REGNO) */
5011 /* Output of dispatch tables. */
5013 /* This macro should be provided on machines where the addresses in a dispatch
5014 table are relative to the table's own address.
5016 The definition should be a C statement to output to the stdio stream STREAM
5017 an assembler pseudo-instruction to generate a difference between two labels.
5018 VALUE and REL are the numbers of two internal labels. The definitions of
5019 these labels are output using `ASM_OUTPUT_INTERNAL_LABEL', and they must be
5020 printed in the same way here. For example,
5022 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */
5024 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
5025 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
5027 /* This macro should be provided on machines where the addresses in a dispatch
5030 The definition should be a C statement to output to the stdio stream STREAM
5031 an assembler pseudo-instruction to generate a reference to a label. VALUE
5032 is the number of an internal label whose definition is output using
5033 `ASM_OUTPUT_INTERNAL_LABEL'. For example,
5035 fprintf (STREAM, "\t.word L%d\n", VALUE) */
5037 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
5038 fprintf (STREAM, "\t.word .L%d\n", VALUE)
5040 /* Define this if the label before a jump-table needs to be output specially.
5041 The first three arguments are the same as for `ASM_OUTPUT_INTERNAL_LABEL';
5042 the fourth argument is the jump-table which follows (a `jump_insn'
5043 containing an `addr_vec' or `addr_diff_vec').
5045 This feature is used on system V to output a `swbeg' statement for the
5048 If this macro is not defined, these labels are output with
5049 `ASM_OUTPUT_INTERNAL_LABEL'.
5051 Defined in svr4.h. */
5052 /* #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) */
5054 /* Define this if something special must be output at the end of a jump-table.
5055 The definition should be a C statement to be executed after the assembler
5056 code for the table is written. It should write the appropriate code to
5057 stdio stream STREAM. The argument TABLE is the jump-table insn, and NUM is
5058 the label-number of the preceding label.
5060 If this macro is not defined, nothing special is output at the end of the
5062 /* #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) */
5065 /* Assembler Commands for Exception Regions. */
5067 /* A C expression to output text to mark the start of an exception region.
5069 This macro need not be defined on most platforms. */
5070 /* #define ASM_OUTPUT_EH_REGION_BEG() */
5072 /* A C expression to output text to mark the end of an exception region.
5074 This macro need not be defined on most platforms. */
5075 /* #define ASM_OUTPUT_EH_REGION_END() */
5077 /* A C expression to switch to the section in which the main exception table is
5078 to be placed (*note Sections::.). The default is a section named
5079 `.gcc_except_table' on machines that support named sections via
5080 `ASM_OUTPUT_SECTION_NAME', otherwise if `-fpic' or `-fPIC' is in effect, the
5081 `data_section', otherwise the `readonly_data_section'. */
5082 /* #define EXCEPTION_SECTION() */
5084 /* If defined, a C string constant for the assembler operation to switch to the
5085 section for exception handling frame unwind information. If not defined,
5086 GNU CC will provide a default definition if the target supports named
5087 sections. `crtstuff.c' uses this macro to switch to the appropriate
5090 You should define this symbol if your target supports DWARF 2 frame unwind
5091 information and the default definition does not work. */
5092 /* #define EH_FRAME_SECTION_ASM_OP */
5094 /* A C expression that is nonzero if the normal exception table output should
5097 This macro need not be defined on most platforms. */
5098 /* #define OMIT_EH_TABLE() */
5100 /* Alternate runtime support for looking up an exception at runtime and finding
5101 the associated handler, if the default method won't work.
5103 This macro need not be defined on most platforms. */
5104 /* #define EH_TABLE_LOOKUP() */
5106 /* A C expression that decides whether or not the current function needs to
5107 have a function unwinder generated for it. See the file `except.c' for
5108 details on when to define this, and how. */
5109 /* #define DOESNT_NEED_UNWINDER */
5111 /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it
5112 does not contain any extraneous set bits in it. */
5113 /* #define MASK_RETURN_ADDR */
5115 /* Define this macro to 0 if your target supports DWARF 2 frame unwind
5116 information, but it does not yet work with exception handling. Otherwise,
5117 if your target supports this information (if it defines
5118 `INCOMING_RETURN_ADDR_RTX' and either `UNALIGNED_INT_ASM_OP' or
5119 `OBJECT_FORMAT_ELF'), GCC will provide a default definition of 1.
5121 If this macro is defined to 1, the DWARF 2 unwinder will be the default
5122 exception handling mechanism; otherwise, setjmp/longjmp will be used by
5125 If this macro is defined to anything, the DWARF 2 unwinder will be used
5126 instead of inline unwinders and __unwind_function in the non-setjmp case. */
5127 /* #define DWARF2_UNWIND_INFO */
5130 /* Assembler Commands for Alignment. */
5132 /* The alignment (log base 2) to put in front of LABEL, which follows
5135 This macro need not be defined if you don't want any special alignment to be
5136 done at such a time. Most machine descriptions do not currently define the
5138 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
5140 /* The desired alignment for the location counter at the beginning
5143 This macro need not be defined if you don't want any special alignment to be
5144 done at such a time. Most machine descriptions do not currently define the
5146 /* #define LOOP_ALIGN(LABEL) */
5148 /* A C statement to output to the stdio stream STREAM an assembler instruction
5149 to advance the location counter by NBYTES bytes. Those bytes should be zero
5150 when loaded. NBYTES will be a C expression of type `int'.
5152 Defined in svr4.h. */
5153 /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
5154 fprintf (STREAM, "\t.zero\t%u\n", (NBYTES)) */
5156 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
5157 section because it fails put zeros in the bytes that are skipped. This is
5158 true on many Unix systems, where the pseudo-op to skip bytes produces no-op
5159 instructions rather than zeros when used in the text section. */
5160 /* #define ASM_NO_SKIP_IN_TEXT */
5162 /* A C statement to output to the stdio stream STREAM an assembler command to
5163 advance the location counter to a multiple of 2 to the POWER bytes. POWER
5164 will be a C expression of type `int'. */
5165 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
5166 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
5169 /* Macros Affecting all Debug Formats. */
5171 /* A C expression that returns the DBX register number for the compiler
5172 register number REGNO. In simple cases, the value of this expression may be
5173 REGNO itself. But sometimes there are some registers that the compiler
5174 knows about and DBX does not, or vice versa. In such cases, some register
5175 may need to have one number in the compiler and another for DBX.
5177 If two registers have consecutive numbers inside GNU CC, and they can be
5178 used as a pair to hold a multiword value, then they *must* have consecutive
5179 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers
5180 will be unable to access such a pair, because they expect register pairs to
5181 be consecutive in their own numbering scheme.
5183 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not
5184 preserve register pairs, then what you must do instead is redefine the
5185 actual register numbering scheme. */
5186 #define DBX_REGISTER_NUMBER(REGNO) \
5187 (GPR_P (REGNO) ? ((REGNO) - GPR_FIRST) \
5188 : ACCUM_P (REGNO) ? ((REGNO) - ACCUM_FIRST + 84) \
5189 : FLAG_P (REGNO) ? 66 /* return psw for all flags */ \
5190 : (REGNO) == ARG_POINTER_REGNUM ? (GPR_SP - GPR_FIRST) \
5191 : (REGNO) == CR_PSW ? (66 + 0) \
5192 : (REGNO) == CR_BPSW ? (66 + 1) \
5193 : (REGNO) == CR_PC ? (66 + 2) \
5194 : (REGNO) == CR_BPC ? (66 + 3) \
5195 : (REGNO) == CR_DPSW ? (66 + 4) \
5196 : (REGNO) == CR_DPC ? (66 + 5) \
5197 : (REGNO) == CR_RPT_C ? (66 + 7) \
5198 : (REGNO) == CR_RPT_S ? (66 + 8) \
5199 : (REGNO) == CR_RPT_E ? (66 + 9) \
5200 : (REGNO) == CR_MOD_S ? (66 + 10) \
5201 : (REGNO) == CR_MOD_E ? (66 + 11) \
5202 : (REGNO) == CR_IBA ? (66 + 14) \
5203 : (REGNO) == CR_EIT_VB ? (66 + 15) \
5204 : (REGNO) == CR_INT_S ? (66 + 16) \
5205 : (REGNO) == CR_INT_M ? (66 + 17) \
5208 /* A C expression that returns the integer offset value for an automatic
5209 variable having address X (an RTL expression). The default computation
5210 assumes that X is based on the frame-pointer and gives the offset from the
5211 frame-pointer. This is required for targets that produce debugging output
5212 for DBX or COFF-style debugging output for SDB and allow the frame-pointer
5213 to be eliminated when the `-g' options is used. */
5214 /* #define DEBUGGER_AUTO_OFFSET(X) */
5216 /* A C expression that returns the integer offset value for an argument having
5217 address X (an RTL expression). The nominal offset is OFFSET. */
5218 /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */
5220 /* A C expression that returns the type of debugging output GNU CC produces
5221 when the user specifies `-g' or `-ggdb'. Define this if you have arranged
5222 for GNU CC to support more than one format of debugging output. Currently,
5223 the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG',
5224 `DWARF2_DEBUG', and `XCOFF_DEBUG'.
5226 The value of this macro only affects the default debugging output; the user
5227 can always get a specific type of output by using `-gstabs', `-gcoff',
5228 `-gdwarf-1', `-gdwarf-2', or `-gxcoff'.
5230 Defined in svr4.h. */
5232 #undef PREFERRED_DEBUGGING_TYPE
5233 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
5236 /* Specific Options for DBX Output. */
5238 /* Define this macro if GNU CC should produce debugging output for DBX in
5239 response to the `-g' option.
5241 Defined in svr4.h. */
5242 /* #define DBX_DEBUGGING_INFO */
5244 /* Define this macro if GNU CC should produce XCOFF format debugging output in
5245 response to the `-g' option. This is a variant of DBX format. */
5246 /* #define XCOFF_DEBUGGING_INFO */
5248 /* Define this macro to control whether GNU CC should by default generate GDB's
5249 extended version of DBX debugging information (assuming DBX-format debugging
5250 information is enabled at all). If you don't define the macro, the default
5251 is 1: always generate the extended information if there is any occasion to. */
5252 /* #define DEFAULT_GDB_EXTENSIONS */
5254 /* Define this macro if all `.stabs' commands should be output while in the
5256 /* #define DEBUG_SYMS_TEXT */
5258 /* A C string constant naming the assembler pseudo op to use instead of
5259 `.stabs' to define an ordinary debugging symbol. If you don't define this
5260 macro, `.stabs' is used. This macro applies only to DBX debugging
5261 information format. */
5262 /* #define ASM_STABS_OP */
5264 /* A C string constant naming the assembler pseudo op to use instead of
5265 `.stabd' to define a debugging symbol whose value is the current location.
5266 If you don't define this macro, `.stabd' is used. This macro applies only
5267 to DBX debugging information format. */
5268 /* #define ASM_STABD_OP */
5270 /* A C string constant naming the assembler pseudo op to use instead of
5271 `.stabn' to define a debugging symbol with no name. If you don't define
5272 this macro, `.stabn' is used. This macro applies only to DBX debugging
5273 information format. */
5274 /* #define ASM_STABN_OP */
5276 /* Define this macro if DBX on your system does not support the construct
5277 `xsTAGNAME'. On some systems, this construct is used to describe a forward
5278 reference to a structure named TAGNAME. On other systems, this construct is
5279 not supported at all. */
5280 /* #define DBX_NO_XREFS */
5282 /* A symbol name in DBX-format debugging information is normally continued
5283 (split into two separate `.stabs' directives) when it exceeds a certain
5284 length (by default, 80 characters). On some operating systems, DBX requires
5285 this splitting; on others, splitting must not be done. You can inhibit
5286 splitting by defining this macro with the value zero. You can override the
5287 default splitting-length by defining this macro as an expression for the
5288 length you desire. */
5289 /* #define DBX_CONTIN_LENGTH */
5291 /* Normally continuation is indicated by adding a `\' character to the end of a
5292 `.stabs' string when a continuation follows. To use a different character
5293 instead, define this macro as a character constant for the character you
5294 want to use. Do not define this macro if backslash is correct for your
5296 /* #define DBX_CONTIN_CHAR */
5298 /* Define this macro if it is necessary to go to the data section before
5299 outputting the `.stabs' pseudo-op for a non-global static variable. */
5300 /* #define DBX_STATIC_STAB_DATA_SECTION */
5302 /* The value to use in the "code" field of the `.stabs' directive for a
5303 typedef. The default is `N_LSYM'. */
5304 /* #define DBX_TYPE_DECL_STABS_CODE */
5306 /* The value to use in the "code" field of the `.stabs' directive for a static
5307 variable located in the text section. DBX format does not provide any
5308 "right" way to do this. The default is `N_FUN'. */
5309 /* #define DBX_STATIC_CONST_VAR_CODE */
5311 /* The value to use in the "code" field of the `.stabs' directive for a
5312 parameter passed in registers. DBX format does not provide any "right" way
5313 to do this. The default is `N_RSYM'. */
5314 /* #define DBX_REGPARM_STABS_CODE */
5316 /* The letter to use in DBX symbol data to identify a symbol as a parameter
5317 passed in registers. DBX format does not customarily provide any way to do
5318 this. The default is `'P''. */
5319 /* #define DBX_REGPARM_STABS_LETTER */
5321 /* The letter to use in DBX symbol data to identify a symbol as a stack
5322 parameter. The default is `'p''. */
5323 /* #define DBX_MEMPARM_STABS_LETTER */
5325 /* Define this macro if the DBX information for a function and its arguments
5326 should precede the assembler code for the function. Normally, in DBX
5327 format, the debugging information entirely follows the assembler code.
5329 Defined in svr4.h. */
5330 /* #define DBX_FUNCTION_FIRST */
5332 /* Define this macro if the `N_LBRAC' symbol for a block should precede the
5333 debugging information for variables and functions defined in that block.
5334 Normally, in DBX format, the `N_LBRAC' symbol comes first. */
5335 /* #define DBX_LBRAC_FIRST */
5337 /* Define this macro if the value of a symbol describing the scope of a block
5338 (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing
5339 function. Normally, GNU C uses an absolute address.
5341 Defined in svr4.h. */
5342 /* #define DBX_BLOCKS_FUNCTION_RELATIVE */
5344 /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL'
5345 stabs for included header files, as on Sun systems. This macro
5346 also directs GNU C to output a type number as a pair of a file
5347 number and a type number within the file. Normally, GNU C does not
5348 generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single
5349 number for a type number. */
5350 /* #define DBX_USE_BINCL */
5353 /* Open ended Hooks for DBX Output. */
5355 /* Define this macro to say how to output to STREAM the debugging information
5356 for the start of a scope level for variable names. The argument NAME is the
5357 name of an assembler symbol (for use with `assemble_name') whose value is
5358 the address where the scope begins. */
5359 /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */
5361 /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */
5362 /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */
5364 /* Define this macro if the target machine requires special handling to output
5365 an enumeration type. The definition should be a C statement (sans
5366 semicolon) to output the appropriate information to STREAM for the type
5368 /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */
5370 /* Define this macro if the target machine requires special output at the end
5371 of the debugging information for a function. The definition should be a C
5372 statement (sans semicolon) to output the appropriate information to STREAM.
5373 FUNCTION is the `FUNCTION_DECL' node for the function. */
5374 /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */
5376 /* Define this macro if you need to control the order of output of the standard
5377 data types at the beginning of compilation. The argument SYMS is a `tree'
5378 which is a chain of all the predefined global symbols, including names of
5381 Normally, DBX output starts with definitions of the types for integers and
5382 characters, followed by all the other predefined types of the particular
5383 language in no particular order.
5385 On some machines, it is necessary to output different particular types
5386 first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those
5387 symbols in the necessary order. Any predefined types that you don't
5388 explicitly output will be output afterward in no particular order.
5390 Be careful not to define this macro so that it works only for C. There are
5391 no global variables to access most of the built-in types, because another
5392 language may have another set of types. The way to output a particular type
5393 is to look through SYMS to see if you can find it. Here is an example:
5397 for (decl = syms; decl; decl = TREE_CHAIN (decl))
5398 if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
5400 dbxout_symbol (decl);
5404 This does nothing if the expected type does not exist.
5406 See the function `init_decl_processing' in `c-decl.c' to find the names to
5407 use for all the built-in C types. */
5408 /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */
5410 /* Some stabs encapsulation formats (in particular ECOFF), cannot
5411 handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx
5412 extention construct. On those machines, define this macro to turn
5413 this feature off without disturbing the rest of the gdb extensions. */
5414 /* #define NO_DBX_FUNCTION_END */
5417 /* File names in DBX format. */
5419 /* Define this if DBX wants to have the current directory recorded in each
5422 Note that the working directory is always recorded if GDB extensions are
5424 /* #define DBX_WORKING_DIRECTORY */
5426 /* A C statement to output DBX debugging information to the stdio stream STREAM
5427 which indicates that file NAME is the main source file--the file specified
5428 as the input file for compilation. This macro is called only once, at the
5429 beginning of compilation.
5431 This macro need not be defined if the standard form of output for DBX
5432 debugging information is appropriate.
5434 Defined in svr4.h. */
5435 /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */
5437 /* A C statement to output DBX debugging information to the stdio stream STREAM
5438 which indicates that the current directory during compilation is named NAME.
5440 This macro need not be defined if the standard form of output for DBX
5441 debugging information is appropriate. */
5442 /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */
5444 /* A C statement to output DBX debugging information at the end of compilation
5445 of the main source file NAME.
5447 If you don't define this macro, nothing special is output at the end of
5448 compilation, which is correct for most machines. */
5449 /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */
5451 /* A C statement to output DBX debugging information to the stdio stream STREAM
5452 which indicates that file NAME is the current source file. This output is
5453 generated each time input shifts to a different source file as a result of
5454 `#include', the end of an included file, or a `#line' command.
5456 This macro need not be defined if the standard form of output for DBX
5457 debugging information is appropriate. */
5458 /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
5461 /* Macros for SDB and Dwarf Output. */
5463 /* Define this macro if GNU CC should produce COFF-style debugging output for
5464 SDB in response to the `-g' option. */
5465 /* #define SDB_DEBUGGING_INFO */
5467 /* Define this macro if GNU CC should produce dwarf format debugging output in
5468 response to the `-g' option.
5470 Defined in svr4.h. */
5471 /* #define DWARF_DEBUGGING_INFO */
5473 /* Define this macro if GNU CC should produce dwarf version 2 format debugging
5474 output in response to the `-g' option.
5476 To support optional call frame debugging information, you must also define
5477 `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the
5478 prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa'
5479 and `dwarf2out_reg_save' as appropriate from `FUNCTION_PROLOGUE' if you
5482 Defined in svr4.h. */
5483 /* #define DWARF2_DEBUGGING_INFO */
5485 /* Define these macros to override the assembler syntax for the special SDB
5486 assembler directives. See `sdbout.c' for a list of these macros and their
5487 arguments. If the standard syntax is used, you need not define them
5489 /* #define PUT_SDB_... */
5491 /* Some assemblers do not support a semicolon as a delimiter, even between SDB
5492 assembler directives. In that case, define this macro to be the delimiter
5493 to use (usually `\n'). It is not necessary to define a new set of
5494 `PUT_SDB_OP' macros if this is the only change required. */
5495 /* #define SDB_DELIM */
5497 /* Define this macro to override the usual method of constructing a dummy name
5498 for anonymous structure and union types. See `sdbout.c' for more
5500 /* #define SDB_GENERATE_FAKE */
5502 /* Define this macro to allow references to unknown structure, union, or
5503 enumeration tags to be emitted. Standard COFF does not allow handling of
5504 unknown references, MIPS ECOFF has support for it. */
5505 /* #define SDB_ALLOW_UNKNOWN_REFERENCES */
5507 /* Define this macro to allow references to structure, union, or enumeration
5508 tags that have not yet been seen to be handled. Some assemblers choke if
5509 forward tags are used, while some require it. */
5510 /* #define SDB_ALLOW_FORWARD_REFERENCES */
5513 /* Cross Compilation and Floating Point. */
5515 /* While all modern machines use 2's complement representation for integers,
5516 there are a variety of representations for floating point numbers. This
5517 means that in a cross-compiler the representation of floating point numbers
5518 in the compiled program may be different from that used in the machine doing
5521 Because different representation systems may offer different amounts of
5522 range and precision, the cross compiler cannot safely use the host machine's
5523 floating point arithmetic. Therefore, floating point constants must be
5524 represented in the target machine's format. This means that the cross
5525 compiler cannot use `atof' to parse a floating point constant; it must have
5526 its own special routine to use instead. Also, constant folding must emulate
5527 the target machine's arithmetic (or must not be done at all).
5529 The macros in the following table should be defined only if you are cross
5530 compiling between different floating point formats.
5532 Otherwise, don't define them. Then default definitions will be set up which
5533 use `double' as the data type, `==' to test for equality, etc.
5535 You don't need to worry about how many times you use an operand of any of
5536 these macros. The compiler never uses operands which have side effects. */
5538 /* A macro for the C data type to be used to hold a floating point value in the
5539 target machine's format. Typically this would be a `struct' containing an
5541 /* #define REAL_VALUE_TYPE */
5543 /* A macro for a C expression which compares for equality the two values, X and
5544 Y, both of type `REAL_VALUE_TYPE'. */
5545 /* #define REAL_VALUES_EQUAL(X, Y) */
5547 /* A macro for a C expression which tests whether X is less than Y, both values
5548 being of type `REAL_VALUE_TYPE' and interpreted as floating point numbers in
5549 the target machine's representation. */
5550 /* #define REAL_VALUES_LESS(X, Y) */
5552 /* A macro for a C expression which performs the standard library function
5553 `ldexp', but using the target machine's floating point representation. Both
5554 X and the value of the expression have type `REAL_VALUE_TYPE'. The second
5555 argument, SCALE, is an integer. */
5556 /* #define REAL_VALUE_LDEXP(X, SCALE) */
5558 /* A macro whose definition is a C expression to convert the target-machine
5559 floating point value X to a signed integer. X has type `REAL_VALUE_TYPE'. */
5560 /* #define REAL_VALUE_FIX(X) */
5562 /* A macro whose definition is a C expression to convert the target-machine
5563 floating point value X to an unsigned integer. X has type
5564 `REAL_VALUE_TYPE'. */
5565 /* #define REAL_VALUE_UNSIGNED_FIX(X) */
5567 /* A macro whose definition is a C expression to round the target-machine
5568 floating point value X towards zero to an integer value (but still as a
5569 floating point number). X has type `REAL_VALUE_TYPE', and so does the
5571 /* #define REAL_VALUE_RNDZINT(X) */
5573 /* A macro whose definition is a C expression to round the target-machine
5574 floating point value X towards zero to an unsigned integer value (but still
5575 represented as a floating point number). X has type `REAL_VALUE_TYPE', and
5576 so does the value. */
5577 /* #define REAL_VALUE_UNSIGNED_RNDZINT(X) */
5579 /* A macro for a C expression which converts STRING, an expression of type
5580 `char *', into a floating point number in the target machine's
5581 representation for mode MODE. The value has type `REAL_VALUE_TYPE'. */
5582 /* #define REAL_VALUE_ATOF(STRING, MODE) */
5584 /* Define this macro if infinity is a possible floating point value, and
5585 therefore division by 0 is legitimate. */
5586 /* #define REAL_INFINITY */
5588 /* A macro for a C expression which determines whether X, a floating point
5589 value, is infinity. The value has type `int'. By default, this is defined
5591 /* #define REAL_VALUE_ISINF(X) */
5593 /* A macro for a C expression which determines whether X, a floating point
5594 value, is a "nan" (not-a-number). The value has type `int'. By default,
5595 this is defined to call `isnan'. */
5596 /* #define REAL_VALUE_ISNAN(X) */
5598 /* Define the following additional macros if you want to make floating point
5599 constant folding work while cross compiling. If you don't define them,
5600 cross compilation is still possible, but constant folding will not happen
5601 for floating point values. */
5603 /* A macro for a C statement which calculates an arithmetic operation of the
5604 two floating point values X and Y, both of type `REAL_VALUE_TYPE' in the
5605 target machine's representation, to produce a result of the same type and
5606 representation which is stored in OUTPUT (which will be a variable).
5608 The operation to be performed is specified by CODE, a tree code which will
5609 always be one of the following: `PLUS_EXPR', `MINUS_EXPR', `MULT_EXPR',
5610 `RDIV_EXPR', `MAX_EXPR', `MIN_EXPR'.
5612 The expansion of this macro is responsible for checking for overflow. If
5613 overflow happens, the macro expansion should execute the statement `return
5614 0;', which indicates the inability to perform the arithmetic operation
5616 /* #define REAL_ARITHMETIC(OUTPUT, CODE, X, Y) */
5618 /* The real.h file actually defines REAL_ARITHMETIC appropriately if it was
5619 defined at all before entering into the code, by using #undef first. */
5620 #define REAL_ARITHMETIC
5622 /* A macro for a C expression which returns the negative of the floating point
5623 value X. Both X and the value of the expression have type `REAL_VALUE_TYPE'
5624 and are in the target machine's floating point representation.
5626 There is no way for this macro to report overflow, since overflow can't
5627 happen in the negation operation. */
5628 /* #define REAL_VALUE_NEGATE(X) */
5630 /* A macro for a C expression which converts the floating point value X to mode
5633 Both X and the value of the expression are in the target machine's floating
5634 point representation and have type `REAL_VALUE_TYPE'. However, the value
5635 should have an appropriate bit pattern to be output properly as a floating
5636 constant whose precision accords with mode MODE.
5638 There is no way for this macro to report overflow. */
5639 /* #define REAL_VALUE_TRUNCATE(MODE, X) */
5641 /* A macro for a C expression which converts a floating point value X into a
5642 double-precision integer which is then stored into LOW and HIGH, two
5643 variables of type INT. */
5644 /* #define REAL_VALUE_TO_INT(LOW, HIGH, X) */
5646 /* A macro for a C expression which converts a double-precision integer found
5647 in LOW and HIGH, two variables of type INT, into a floating point value
5648 which is then stored into X. */
5649 /* #define REAL_VALUE_FROM_INT(X, LOW, HIGH) */
5652 /* Miscellaneous Parameters. */
5654 /* Define this if you have defined special-purpose predicates in the file
5655 `MACHINE.c'. This macro is called within an initializer of an array of
5656 structures. The first field in the structure is the name of a predicate and
5657 the second field is an array of rtl codes. For each predicate, list all rtl
5658 codes that can be in expressions matched by the predicate. The list should
5659 have a trailing comma. Here is an example of two entries in the list for a
5660 typical RISC machine:
5662 #define PREDICATE_CODES \
5663 {"gen_reg_rtx_operand", {SUBREG, REG}}, \
5664 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
5666 Defining this macro does not affect the generated code (however, incorrect
5667 definitions that omit an rtl code that may be matched by the predicate can
5668 cause the compiler to malfunction). Instead, it allows the table built by
5669 `genrecog' to be more compact and efficient, thus speeding up the compiler.
5670 The most important predicates to include in the list specified by this macro
5671 are thoses used in the most insn patterns. */
5673 #define PREDICATE_CODES \
5674 { "short_memory_operand", { MEM }}, \
5675 { "long_memory_operand", { MEM }}, \
5676 { "d30v_memory_operand", { MEM }}, \
5677 { "single_reg_memory_operand", { MEM }}, \
5678 { "const_addr_memory_operand", { MEM }}, \
5679 { "call_operand", { MEM }}, \
5680 { "gpr_operand", { REG, SUBREG }}, \
5681 { "accum_operand", { REG, SUBREG }}, \
5682 { "gpr_or_accum_operand", { REG, SUBREG }}, \
5683 { "cr_operand", { REG, SUBREG }}, \
5684 { "repeat_operand", { REG, SUBREG }}, \
5685 { "flag_operand", { REG, SUBREG }}, \
5686 { "br_flag_operand", { REG, SUBREG }}, \
5687 { "br_flag_or_constant_operand", { REG, SUBREG, CONST_INT }}, \
5688 { "gpr_or_br_flag_operand", { REG, SUBREG }}, \
5689 { "f0_operand", { REG, SUBREG }}, \
5690 { "f1_operand", { REG, SUBREG }}, \
5691 { "carry_operand", { REG, SUBREG }}, \
5692 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, \
5694 { "gpr_or_signed6_operand", { REG, SUBREG, CONST_INT }}, \
5695 { "gpr_or_unsigned5_operand", { REG, SUBREG, CONST_INT }}, \
5696 { "gpr_or_unsigned6_operand", { REG, SUBREG, CONST_INT }}, \
5697 { "gpr_or_constant_operand", { REG, SUBREG, CONST_INT, \
5698 CONST, SYMBOL_REF, \
5700 { "gpr_or_dbl_const_operand", { REG, SUBREG, CONST_INT, \
5701 CONST, SYMBOL_REF, \
5702 LABEL_REF, CONST_DOUBLE }}, \
5703 { "gpr_or_memory_operand", { REG, SUBREG, MEM }}, \
5704 { "move_input_operand", { REG, SUBREG, MEM, CONST_INT, \
5705 CONST, SYMBOL_REF, \
5706 LABEL_REF, CONST_DOUBLE }}, \
5707 { "move_output_operand", { REG, SUBREG, MEM }}, \
5708 { "signed6_operand", { CONST_INT }}, \
5709 { "unsigned5_operand", { CONST_INT }}, \
5710 { "unsigned6_operand", { CONST_INT }}, \
5711 { "bitset_operand", { CONST_INT }}, \
5712 { "condexec_test_operator", { EQ, NE }}, \
5713 { "condexec_branch_operator", { EQ, NE }}, \
5714 { "condexec_unary_operator", { ABS, NEG, NOT, ZERO_EXTEND }}, \
5715 { "condexec_addsub_operator", { PLUS, MINUS }}, \
5716 { "condexec_binary_operator", { MULT, AND, IOR, XOR, \
5717 ASHIFT, ASHIFTRT, LSHIFTRT, \
5718 ROTATE, ROTATERT }}, \
5719 { "condexec_shiftl_operator", { ASHIFT, ROTATE }}, \
5720 { "condexec_extend_operator", { SIGN_EXTEND, ZERO_EXTEND }}, \
5721 { "branch_zero_operator", { EQ, NE }}, \
5722 { "cond_move_dest_operand", { REG, SUBREG, MEM }}, \
5723 { "cond_move_operand", { REG, SUBREG, CONST_INT, \
5724 CONST, SYMBOL_REF, \
5725 LABEL_REF, MEM }}, \
5726 { "cond_exec_operand", { REG, SUBREG, CONST_INT, \
5727 CONST, SYMBOL_REF, \
5728 LABEL_REF, MEM }}, \
5729 { "srelational_si_operator", { EQ, NE, LT, LE, GT, GE }}, \
5730 { "urelational_si_operator", { LTU, LEU, GTU, GEU }}, \
5731 { "relational_di_operator", { EQ, NE, LT, LE, GT, GE, \
5732 LTU, LEU, GTU, GEU }},
5734 /* An alias for a machine mode name. This is the machine mode that elements of
5735 a jump-table should have. */
5736 #define CASE_VECTOR_MODE SImode
5738 /* Define as C expression which evaluates to nonzero if the tablejump
5739 instruction expects the table to contain offsets from the address of the
5741 Do not define this if the table should contain absolute addresses. */
5742 /* #define CASE_VECTOR_PC_RELATIVE 1 */
5744 /* Define this if control falls through a `case' insn when the index value is
5745 out of range. This means the specified default-label is actually ignored by
5746 the `case' insn proper. */
5747 /* #define CASE_DROPS_THROUGH */
5749 /* Define this to be the smallest number of different values for which it is
5750 best to use a jump-table instead of a tree of conditional branches. The
5751 default is four for machines with a `casesi' instruction and five otherwise.
5752 This is best for most machines. */
5753 /* #define CASE_VALUES_THRESHOLD */
5755 /* Define this macro if operations between registers with integral mode smaller
5756 than a word are always performed on the entire register. Most RISC machines
5757 have this property and most CISC machines do not. */
5758 #define WORD_REGISTER_OPERATIONS 1
5760 /* Define this macro to be a C expression indicating when insns that read
5761 memory in MODE, an integral mode narrower than a word, set the bits outside
5762 of MODE to be either the sign-extension or the zero-extension of the data
5763 read. Return `SIGN_EXTEND' for values of MODE for which the insn
5764 sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other
5767 This macro is not called with MODE non-integral or with a width greater than
5768 or equal to `BITS_PER_WORD', so you may return any value in this case. Do
5769 not define this macro if it would always return `NIL'. On machines where
5770 this macro is defined, you will normally define it as the constant
5771 `SIGN_EXTEND' or `ZERO_EXTEND'. */
5773 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
5775 /* Define if loading short immediate values into registers sign extends. */
5776 #define SHORT_IMMEDIATES_SIGN_EXTEND
5778 /* An alias for a tree code that should be used by default for conversion of
5779 floating point values to fixed point. Normally, `FIX_ROUND_EXPR' is used. */
5780 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
5782 /* Define this macro if the same instructions that convert a floating point
5783 number to a signed fixed point number also convert validly to an unsigned
5785 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
5787 /* An alias for a tree code that is the easiest kind of division to compile
5788 code for in the general case. It may be `TRUNC_DIV_EXPR', `FLOOR_DIV_EXPR',
5789 `CEIL_DIV_EXPR' or `ROUND_DIV_EXPR'. These four division operators differ
5790 in how they round the result to an integer. `EASY_DIV_EXPR' is used when it
5791 is permissible to use any of those kinds of division and the choice should
5792 be made on the basis of efficiency. */
5793 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
5795 /* The maximum number of bytes that a single instruction can move quickly from
5796 memory to memory. */
5799 /* The maximum number of bytes that a single instruction can move quickly from
5800 memory to memory. If this is undefined, the default is `MOVE_MAX'.
5801 Otherwise, it is the constant value that is the largest value that
5802 `MOVE_MAX' can have at run-time. */
5803 /* #define MAX_MOVE_MAX */
5805 /* A C expression that is nonzero if on this machine the number of bits
5806 actually used for the count of a shift operation is equal to the number of
5807 bits needed to represent the size of the object being shifted. When this
5808 macro is non-zero, the compiler will assume that it is safe to omit a
5809 sign-extend, zero-extend, and certain bitwise `and' instructions that
5810 truncates the count of a shift operation. On machines that have
5811 instructions that act on bitfields at variable positions, which may include
5812 `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables
5813 deletion of truncations of the values that serve as arguments to bitfield
5816 If both types of instructions truncate the count (for shifts) and position
5817 (for bitfield operations), or if no variable-position bitfield instructions
5818 exist, you should define this macro.
5820 However, on some machines, such as the 80386 and the 680x0, truncation only
5821 applies to shift operations and not the (real or pretended) bitfield
5822 operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines.
5823 Instead, add patterns to the `md' file that include the implied truncation
5824 of the shift instructions.
5826 You need not define this macro if it would always have the value of zero. */
5827 /* #define SHIFT_COUNT_TRUNCATED */
5829 /* A C expression which is nonzero if on this machine it is safe to "convert"
5830 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
5831 than INPREC) by merely operating on it as if it had only OUTPREC bits.
5833 On many machines, this expression can be 1.
5835 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
5836 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
5837 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
5839 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
5841 /* A C expression describing the value returned by a comparison operator with
5842 an integral mode and stored by a store-flag instruction (`sCOND') when the
5843 condition is true. This description must apply to *all* the `sCOND'
5844 patterns and all the comparison operators whose results have a `MODE_INT'
5847 A value of 1 or -1 means that the instruction implementing the comparison
5848 operator returns exactly 1 or -1 when the comparison is true and 0 when the
5849 comparison is false. Otherwise, the value indicates which bits of the
5850 result are guaranteed to be 1 when the comparison is true. This value is
5851 interpreted in the mode of the comparison operation, which is given by the
5852 mode of the first operand in the `sCOND' pattern. Either the low bit or the
5853 sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used
5856 If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code
5857 that depends only on the specified bits. It can also replace comparison
5858 operators with equivalent operations if they cause the required bits to be
5859 set, even if the remaining bits are undefined. For example, on a machine
5860 whose comparison operators return an `SImode' value and where
5861 `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit
5862 is relevant, the expression
5864 (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0))
5868 (ashift:SI X (const_int N))
5870 where N is the appropriate shift count to move the bit being tested into the
5873 There is no way to describe a machine that always sets the low-order bit for
5874 a true value, but does not guarantee the value of any other bits, but we do
5875 not know of any machine that has such an instruction. If you are trying to
5876 port GNU CC to such a machine, include an instruction to perform a
5877 logical-and of the result with 1 in the pattern for the comparison operators
5878 and let us know (*note How to Report Bugs: Bug Reporting.).
5880 Often, a machine will have multiple instructions that obtain a value from a
5881 comparison (or the condition codes). Here are rules to guide the choice of
5882 value for `STORE_FLAG_VALUE', and hence the instructions to be used:
5884 * Use the shortest sequence that yields a valid definition for
5885 `STORE_FLAG_VALUE'. It is more efficient for the compiler to
5886 "normalize" the value (convert it to, e.g., 1 or 0) than for
5887 the comparison operators to do so because there may be
5888 opportunities to combine the normalization with other
5891 * For equal-length sequences, use a value of 1 or -1, with -1
5892 being slightly preferred on machines with expensive jumps and
5893 1 preferred on other machines.
5895 * As a second choice, choose a value of `0x80000001' if
5896 instructions exist that set both the sign and low-order bits
5897 but do not define the others.
5899 * Otherwise, use a value of `0x80000000'.
5901 Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and
5902 its negation in the same number of instructions. On those machines, you
5903 should also define a pattern for those cases, e.g., one matching
5905 (set A (neg:M (ne:M B C)))
5907 Some machines can also perform `and' or `plus' operations on condition code
5908 values with less instructions than the corresponding `sCOND' insn followed
5909 by `and' or `plus'. On those machines, define the appropriate patterns.
5910 Use the names `incscc' and `decscc', respectively, for the the patterns
5911 which perform `plus' or `minus' operations on condition code values. See
5912 `rs6000.md' for some examples. The GNU Superoptizer can be used to find
5913 such instruction sequences on other machines.
5915 You need not define `STORE_FLAG_VALUE' if the machine has no store-flag
5917 /* #define STORE_FLAG_VALUE */
5919 /* A C expression that gives a non-zero floating point value that is returned
5920 when comparison operators with floating-point results are true. Define this
5921 macro on machine that have comparison operations that return floating-point
5922 values. If there are no such operations, do not define this macro. */
5923 /* #define FLOAT_STORE_FLAG_VALUE */
5925 /* An alias for the machine mode for pointers. On most machines, define this
5926 to be the integer mode corresponding to the width of a hardware pointer;
5927 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
5928 you must define this to be one of the partial integer modes, such as
5931 The width of `Pmode' must be at least as large as the value of
5932 `POINTER_SIZE'. If it is not equal, you must define the macro
5933 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
5934 #define Pmode SImode
5936 /* An alias for the machine mode used for memory references to functions being
5937 called, in `call' RTL expressions. On most machines this should be
5939 #define FUNCTION_MODE QImode
5941 /* A C expression for the maximum number of instructions above which the
5942 function DECL should not be inlined. DECL is a `FUNCTION_DECL' node.
5944 The default definition of this macro is 64 plus 8 times the number of
5945 arguments that the function accepts. Some people think a larger threshold
5946 should be used on RISC machines. */
5947 /* #define INTEGRATE_THRESHOLD(DECL) */
5949 /* Define this if the preprocessor should ignore `#sccs' directives and print
5952 Defined in svr4.h. */
5953 /* #define SCCS_DIRECTIVE */
5955 /* Define this macro if the system header files support C++ as well as C. This
5956 macro inhibits the usual method of using system header files in C++, which
5957 is to pretend that the file's contents are enclosed in `extern "C" {...}'. */
5958 /* #define NO_IMPLICIT_EXTERN_C */
5960 /* Define this macro to handle System V style pragmas (particularly #pack).
5962 Defined in svr4.h. */
5963 #define HANDLE_SYSV_PRAGMA
5965 /* Define this macro if you want to handle #pragma weak (HANDLE_SYSV_PRAGMA
5966 must also be defined). */
5967 /* #define HANDLE_WEAK_PRAGMA */
5969 /* If defined, a C expression whose value is nonzero if IDENTIFIER with
5970 arguments ARGS is a valid machine specific attribute for DECL. The
5971 attributes in ATTRIBUTES have previously been assigned to DECL. */
5972 /* #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) */
5974 /* If defined, a C expression whose value is nonzero if IDENTIFIER with
5975 arguments ARGS is a valid machine specific attribute for TYPE. The
5976 attributes in ATTRIBUTES have previously been assigned to TYPE. */
5977 /* #define VALID_MACHINE_TYPE_ATTRIBUTE(TYPE, ATTRIBUTES, IDENTIFIER, ARGS) */
5979 /* If defined, a C expression whose value is zero if the attributes on TYPE1
5980 and TYPE2 are incompatible, one if they are compatible, and two if they are
5981 nearly compatible (which causes a warning to be generated). */
5982 /* #define COMP_TYPE_ATTRIBUTES(TYPE1, TYPE2) */
5984 /* If defined, a C statement that assigns default attributes to newly defined
5986 /* #define SET_DEFAULT_TYPE_ATTRIBUTES(TYPE) */
5988 /* Define this macro to control use of the character `$' in identifier names.
5989 The value should be 0, 1, or 2. 0 means `$' is not allowed by default; 1
5990 means it is allowed by default if `-traditional' is used; 2 means it is
5991 allowed by default provided `-ansi' is not used. 1 is the default; there is
5992 no need to define this macro in that case. */
5993 /* #define DOLLARS_IN_IDENTIFIERS */
5995 /* Define this macro if the assembler does not accept the character `$' in
5996 label names. By default constructors and destructors in G++ have `$' in the
5997 identifiers. If this macro is defined, `.' is used instead.
5999 Defined in svr4.h. */
6000 /* #define NO_DOLLAR_IN_LABEL */
6002 /* Define this macro if the assembler does not accept the character `.' in
6003 label names. By default constructors and destructors in G++ have names that
6004 use `.'. If this macro is defined, these names are rewritten to avoid `.'. */
6005 /* #define NO_DOT_IN_LABEL */
6007 /* Define this macro if the target system expects every program's `main'
6008 function to return a standard "success" value by default (if no other value
6009 is explicitly returned).
6011 The definition should be a C statement (sans semicolon) to generate the
6012 appropriate rtl instructions. It is used only when compiling the end of
6014 /* #define DEFAULT_MAIN_RETURN */
6016 /* Define this if the target system supports the function `atexit' from the
6017 ANSI C standard. If this is not defined, and `INIT_SECTION_ASM_OP' is not
6018 defined, a default `exit' function will be provided to support C++.
6020 Defined by svr4.h */
6021 /* #define HAVE_ATEXIT */
6023 /* Define this if your `exit' function needs to do something besides calling an
6024 external function `_cleanup' before terminating with `_exit'. The
6025 `EXIT_BODY' macro is only needed if netiher `HAVE_ATEXIT' nor
6026 `INIT_SECTION_ASM_OP' are defined. */
6027 /* #define EXIT_BODY */
6029 /* Define this macro as a C expression that is nonzero if it is safe for the
6030 delay slot scheduler to place instructions in the delay slot of INSN, even
6031 if they appear to use a resource set or clobbered in INSN. INSN is always a
6032 `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this
6033 behavior. On machines where some `insn' or `jump_insn' is really a function
6034 call and hence has this behavior, you should define this macro.
6036 You need not define this macro if it would always return zero. */
6037 /* #define INSN_SETS_ARE_DELAYED(INSN) */
6039 /* Define this macro as a C expression that is nonzero if it is safe for the
6040 delay slot scheduler to place instructions in the delay slot of INSN, even
6041 if they appear to set or clobber a resource referenced in INSN. INSN is
6042 always a `jump_insn' or an `insn'. On machines where some `insn' or
6043 `jump_insn' is really a function call and its operands are registers whose
6044 use is actually in the subroutine it calls, you should define this macro.
6045 Doing so allows the delay slot scheduler to move instructions which copy
6046 arguments into the argument registers into the delay slot of INSN.
6048 You need not define this macro if it would always return zero. */
6049 /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */
6051 /* In rare cases, correct code generation requires extra machine dependent
6052 processing between the second jump optimization pass and delayed branch
6053 scheduling. On those machines, define this macro as a C statement to act on
6054 the code starting at INSN. */
6055 #define MACHINE_DEPENDENT_REORG(INSN) d30v_machine_dependent_reorg (INSN)
6057 /* Define this macro if in some cases global symbols from one translation unit
6058 may not be bound to undefined symbols in another translation unit without
6059 user intervention. For instance, under Microsoft Windows symbols must be
6060 explicitly imported from shared libraries (DLLs). */
6061 /* #define MULTIPLE_SYMBOL_SPACES */
6063 /* A C expression for the maximum number of instructions to execute via
6064 conditional execution instructions instead of a branch. A value of
6065 BRANCH_COST+1 is the default if the machine does not use cc0, and 1 if it
6067 #define MAX_CONDITIONAL_EXECUTE d30v_cond_exec
6069 #define D30V_DEFAULT_MAX_CONDITIONAL_EXECUTE 4
6071 /* Values of the -mcond-exec=n string. */
6072 extern int d30v_cond_exec;
6073 extern const char *d30v_cond_exec_string;
6075 /* Indicate how many instructions can be issued at the same time. */
6076 #define ISSUE_RATE 2
6078 #endif /* GCC_D30V_H */
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