1 /* Definitions of target machine for Mitsubishi D30V.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Solutions.
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 /* D30V specific macros */
27 /* Align an address */
28 #define D30V_ALIGN(addr,align) (((addr) + (align) - 1) & ~((align) - 1))
31 /* Driver configuration */
33 /* A C expression which determines whether the option `-CHAR' takes arguments.
34 The value should be the number of arguments that option takes-zero, for many
37 By default, this macro is defined to handle the standard options properly.
38 You need not define it unless you wish to add additional options which take
42 /* #define SWITCH_TAKES_ARG(CHAR) */
44 /* A C expression which determines whether the option `-NAME' takes arguments.
45 The value should be the number of arguments that option takes-zero, for many
46 options. This macro rather than `SWITCH_TAKES_ARG' is used for
47 multi-character option names.
49 By default, this macro is defined as `DEFAULT_WORD_SWITCH_TAKES_ARG', which
50 handles the standard options properly. You need not define
51 `WORD_SWITCH_TAKES_ARG' unless you wish to add additional options which take
52 arguments. Any redefinition should call `DEFAULT_WORD_SWITCH_TAKES_ARG' and
53 then check for additional options.
56 /* #define WORD_SWITCH_TAKES_ARG(NAME) */
58 /* A string-valued C expression which is nonempty if the linker needs a space
59 between the `-L' or `-o' option and its argument.
61 If this macro is not defined, the default value is 0. */
62 /* #define SWITCHES_NEED_SPACES "" */
64 /* A C string constant that tells the GNU CC driver program options to pass to
65 CPP. It can also specify how to translate options you give to GNU CC into
66 options for GNU CC to pass to the CPP.
68 Do not define this macro if it does not need to do anything. */
69 /* #define CPP_SPEC "" */
71 /* If this macro is defined, the preprocessor will not define the builtin macro
72 `__SIZE_TYPE__'. The macro `__SIZE_TYPE__' must then be defined by
75 This should be defined if `SIZE_TYPE' depends on target dependent flags
76 which are not accessible to the preprocessor. Otherwise, it should not be
78 /* #define NO_BUILTIN_SIZE_TYPE */
80 /* If this macro is defined, the preprocessor will not define the builtin macro
81 `__PTRDIFF_TYPE__'. The macro `__PTRDIFF_TYPE__' must then be defined by
84 This should be defined if `PTRDIFF_TYPE' depends on target dependent flags
85 which are not accessible to the preprocessor. Otherwise, it should not be
87 /* #define NO_BUILTIN_PTRDIFF_TYPE */
89 /* A C string constant that tells the GNU CC driver program options to pass to
90 CPP. By default, this macro is defined to pass the option
91 `-D__CHAR_UNSIGNED__' to CPP if `char' will be treated as `unsigned char' by
94 Do not define this macro unless you need to override the default definition. */
95 /* #if DEFAULT_SIGNED_CHAR
96 #define SIGNED_CHAR_SPEC "%{funsigned-char:-D__CHAR_UNSIGNED__}"
98 #define SIGNED_CHAR_SPEC "%{!fsigned-char:-D__CHAR_UNSIGNED__}"
101 /* A C string constant that tells the GNU CC driver program options to pass to
102 `cc1'. It can also specify how to translate options you give to GNU CC into
103 options for GNU CC to pass to the `cc1'.
105 Do not define this macro if it does not need to do anything. */
106 /* #define CC1_SPEC "" */
108 /* A C string constant that tells the GNU CC driver program options to pass to
109 `cc1plus'. It can also specify how to translate options you give to GNU CC
110 into options for GNU CC to pass to the `cc1plus'.
112 Do not define this macro if it does not need to do anything. */
113 /* #define CC1PLUS_SPEC "" */
115 /* A C string constant that tells the GNU CC driver program options to pass to
116 the assembler. It can also specify how to translate options you give to GNU
117 CC into options for GNU CC to pass to the assembler. See the file `sun3.h'
118 for an example of this.
120 Do not define this macro if it does not need to do anything.
122 Defined in svr4.h. */
125 %{!mno-asm-optimize: %{O*: %{!O0: -O} %{O0: %{masm-optimize: -O}}}} \
126 %{v} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
128 /* A C string constant that tells the GNU CC driver program how to run any
129 programs which cleanup after the normal assembler. Normally, this is not
130 needed. See the file `mips.h' for an example of this.
132 Do not define this macro if it does not need to do anything.
134 Defined in svr4.h. */
135 /* #define ASM_FINAL_SPEC "" */
137 /* A C string constant that tells the GNU CC driver program options to pass to
138 the linker. It can also specify how to translate options you give to GNU CC
139 into options for GNU CC to pass to the linker.
141 Do not define this macro if it does not need to do anything.
143 Defined in svr4.h. */
148 %{static:-dn -Bstatic} \
149 %{shared:-G -dy -z text} \
150 %{symbolic:-Bsymbolic -G -dy -z text} \
154 %{mextmem: -m d30v_e} %{mextmemory: -m d30v_e} %{monchip: -m d30v_o}"
156 /* Another C string constant used much like `LINK_SPEC'. The difference
157 between the two is that `LIB_SPEC' is used at the end of the command given
160 If this macro is not defined, a default is provided that loads the standard
161 C library from the usual place. See `gcc.c'.
163 Defined in svr4.h. */
165 #define LIB_SPEC "--start-group -lsim -lc --end-group"
167 /* Another C string constant that tells the GNU CC driver program how and when
168 to place a reference to `libgcc.a' into the linker command line. This
169 constant is placed both before and after the value of `LIB_SPEC'.
171 If this macro is not defined, the GNU CC driver provides a default that
172 passes the string `-lgcc' to the linker unless the `-shared' option is
174 /* #define LIBGCC_SPEC "" */
176 /* Another C string constant used much like `LINK_SPEC'. The difference
177 between the two is that `STARTFILE_SPEC' is used at the very beginning of
178 the command given to the linker.
180 If this macro is not defined, a default is provided that loads the standard
181 C startup file from the usual place. See `gcc.c'.
183 Defined in svr4.h. */
185 #undef STARTFILE_SPEC
186 #define STARTFILE_SPEC "crt0%O%s crtbegin%O%s"
188 /* Another C string constant used much like `LINK_SPEC'. The difference
189 between the two is that `ENDFILE_SPEC' is used at the very end of the
190 command given to the linker.
192 Do not define this macro if it does not need to do anything.
194 Defined in svr4.h. */
197 #define ENDFILE_SPEC "crtend%O%s"
199 /* Define this macro if the driver program should find the library `libgcc.a'
200 itself and should not pass `-L' options to the linker. If you do not define
201 this macro, the driver program will pass the argument `-lgcc' to tell the
202 linker to do the search and will pass `-L' options to it. */
203 /* #define LINK_LIBGCC_SPECIAL */
205 /* Define this macro if the driver program should find the library `libgcc.a'.
206 If you do not define this macro, the driver program will pass the argument
207 `-lgcc' to tell the linker to do the search. This macro is similar to
208 `LINK_LIBGCC_SPECIAL', except that it does not affect `-L' options. */
209 /* #define LINK_LIBGCC_SPECIAL_1 */
211 /* Define this macro to provide additional specifications to put in the `specs'
212 file that can be used in various specifications like `CC1_SPEC'.
214 The definition should be an initializer for an array of structures,
215 containing a string constant, that defines the specification name, and a
216 string constant that provides the specification.
218 Do not define this macro if it does not need to do anything. */
219 /* #define EXTRA_SPECS {{}} */
221 /* Define this macro as a C expression for the initializer of an array of
222 string to tell the driver program which options are defaults for this target
223 and thus do not need to be handled specially when using `MULTILIB_OPTIONS'.
225 Do not define this macro if `MULTILIB_OPTIONS' is not defined in the target
226 makefile fragment or if none of the options listed in `MULTILIB_OPTIONS' are
227 set by default. *Note Target Fragment::. */
228 /* #define MULTILIB_DEFAULTS {} */
230 /* Define this macro to tell `gcc' that it should only translate a `-B' prefix
231 into a `-L' linker option if the prefix indicates an absolute file name. */
232 /* #define RELATIVE_PREFIX_NOT_LINKDIR */
234 /* Define this macro as a C string constant if you wish to override the
235 standard choice of `/usr/local/lib/gcc-lib/' as the default prefix to try
236 when searching for the executable files of the compiler. */
237 /* #define STANDARD_EXEC_PREFIX "" */
239 /* If defined, this macro is an additional prefix to try after
240 `STANDARD_EXEC_PREFIX'. `MD_EXEC_PREFIX' is not searched when the `-b'
241 option is used, or the compiler is built as a cross compiler.
243 Defined in svr4.h for host compilers. */
244 /* #define MD_EXEC_PREFIX "" */
246 /* Define this macro as a C string constant if you wish to override the
247 standard choice of `/usr/local/lib/' as the default prefix to try when
248 searching for startup files such as `crt0.o'. */
249 /* #define STANDARD_STARTFILE_PREFIX "" */
251 /* If defined, this macro supplies an additional prefix to try after the
252 standard prefixes. `MD_EXEC_PREFIX' is not searched when the `-b' option is
253 used, or when the compiler is built as a cross compiler.
255 Defined in svr4.h for host compilers. */
256 /* #define MD_STARTFILE_PREFIX "" */
258 /* If defined, this macro supplies yet another prefix to try after the standard
259 prefixes. It is not searched when the `-b' option is used, or when the
260 compiler is built as a cross compiler. */
261 /* #define MD_STARTFILE_PREFIX_1 "" */
263 /* Define this macro as a C string constant if you with to set environment
264 variables for programs called by the driver, such as the assembler and
265 loader. The driver passes the value of this macro to `putenv' to initialize
266 the necessary environment variables. */
267 /* #define INIT_ENVIRONMENT "" */
269 /* Define this macro as a C string constant if you wish to override the
270 standard choice of `/usr/local/include' as the default prefix to try when
271 searching for local header files. `LOCAL_INCLUDE_DIR' comes before
272 `SYSTEM_INCLUDE_DIR' in the search order.
274 Cross compilers do not use this macro and do not search either
275 `/usr/local/include' or its replacement. */
276 /* #define LOCAL_INCLUDE_DIR "" */
278 /* Define this macro as a C string constant if you wish to specify a
279 system-specific directory to search for header files before the standard
280 directory. `SYSTEM_INCLUDE_DIR' comes before `STANDARD_INCLUDE_DIR' in the
283 Cross compilers do not use this macro and do not search the directory
285 /* #define SYSTEM_INCLUDE_DIR "" */
287 /* Define this macro as a C string constant if you wish to override the
288 standard choice of `/usr/include' as the default prefix to try when
289 searching for header files.
291 Cross compilers do not use this macro and do not search either
292 `/usr/include' or its replacement. */
293 /* #define STANDARD_INCLUDE_DIR "" */
295 /* Define this macro if you wish to override the entire default search path for
296 include files. The default search path includes `GCC_INCLUDE_DIR',
297 `LOCAL_INCLUDE_DIR', `SYSTEM_INCLUDE_DIR', `GPLUSPLUS_INCLUDE_DIR', and
298 `STANDARD_INCLUDE_DIR'. In addition, `GPLUSPLUS_INCLUDE_DIR' and
299 `GCC_INCLUDE_DIR' are defined automatically by `Makefile', and specify
300 private search areas for GCC. The directory `GPLUSPLUS_INCLUDE_DIR' is used
301 only for C++ programs.
303 The definition should be an initializer for an array of structures. Each
304 array element should have two elements: the directory name (a string
305 constant) and a flag for C++-only directories. Mark the end of the array
306 with a null element. For example, here is the definition used for VMS:
308 #define INCLUDE_DEFAULTS \
310 { "GNU_GXX_INCLUDE:", 1}, \
311 { "GNU_CC_INCLUDE:", 0}, \
312 { "SYS$SYSROOT:[SYSLIB.]", 0}, \
317 Here is the order of prefixes tried for exec files:
319 1. Any prefixes specified by the user with `-B'.
321 2. The environment variable `GCC_EXEC_PREFIX', if any.
323 3. The directories specified by the environment variable
326 4. The macro `STANDARD_EXEC_PREFIX'.
330 6. The macro `MD_EXEC_PREFIX', if any.
332 Here is the order of prefixes tried for startfiles:
334 1. Any prefixes specified by the user with `-B'.
336 2. The environment variable `GCC_EXEC_PREFIX', if any.
338 3. The directories specified by the environment variable
339 `LIBRARY_PATH' (native only, cross compilers do not use this).
341 4. The macro `STANDARD_EXEC_PREFIX'.
345 6. The macro `MD_EXEC_PREFIX', if any.
347 7. The macro `MD_STARTFILE_PREFIX', if any.
349 8. The macro `STANDARD_STARTFILE_PREFIX'.
354 /* #define INCLUDE_DEFAULTS {{ }} */
357 /* Run-time target specifications */
359 /* Define this to be a string constant containing `-D' options to define the
360 predefined macros that identify this machine and system. These macros will
361 be predefined unless the `-ansi' option is specified.
363 In addition, a parallel set of macros are predefined, whose names are made
364 by appending `__' at the beginning and at the end. These `__' macros are
365 permitted by the ANSI standard, so they are predefined regardless of whether
366 `-ansi' is specified.
368 For example, on the Sun, one can use the following value:
370 "-Dmc68000 -Dsun -Dunix"
372 The result is to define the macros `__mc68000__', `__sun__' and `__unix__'
373 unconditionally, and the macros `mc68000', `sun' and `unix' provided `-ansi'
375 #define CPP_PREDEFINES "-D__D30V__ -Amachine=d30v"
377 /* This declaration should be present. */
378 extern int target_flags;
380 /* This series of macros is to allow compiler command arguments to enable or
381 disable the use of optional features of the target machine. For example,
382 one machine description serves both the 68000 and the 68020; a command
383 argument tells the compiler whether it should use 68020-only instructions or
384 not. This command argument works by means of a macro `TARGET_68020' that
385 tests a bit in `target_flags'.
387 Define a macro `TARGET_FEATURENAME' for each such option. Its definition
388 should test a bit in `target_flags'; for example:
390 #define TARGET_68020 (target_flags & 1)
392 One place where these macros are used is in the condition-expressions of
393 instruction patterns. Note how `TARGET_68020' appears frequently in the
394 68000 machine description file, `m68k.md'. Another place they are used is
395 in the definitions of the other macros in the `MACHINE.h' file. */
397 #define MASK_NO_COND_MOVE 0x00000001 /* disable conditional moves */
399 #define MASK_DEBUG_ARG 0x10000000 /* debug argument handling */
400 #define MASK_DEBUG_STACK 0x20000000 /* debug stack allocations */
401 #define MASK_DEBUG_ADDR 0x40000000 /* debug GO_IF_LEGITIMATE_ADDRESS */
403 #define TARGET_NO_COND_MOVE (target_flags & MASK_NO_COND_MOVE)
404 #define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG)
405 #define TARGET_DEBUG_STACK (target_flags & MASK_DEBUG_STACK)
406 #define TARGET_DEBUG_ADDR (target_flags & MASK_DEBUG_ADDR)
408 #define TARGET_COND_MOVE (! TARGET_NO_COND_MOVE)
410 /* Default switches used. */
411 #ifndef TARGET_DEFAULT
412 #define TARGET_DEFAULT 0
415 /* This macro defines names of command options to set and clear bits in
416 `target_flags'. Its definition is an initializer with a subgrouping for
419 Each subgrouping contains a string constant, that defines the option name, a
420 number, which contains the bits to set in `target_flags', and a second
421 string which is the description displayed by `--help'. If the number is
422 negative then the bits specified by the number are cleared instead of being
423 set. If the description string is present but empty, then no help
424 information will be displayed for that option, but it will not count as an
425 undocumented option. The actual option name is made by appending `-m' to
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 meanings,
433 and picks the latter as the default:
435 #define TARGET_SWITCHES \
436 { { "68020", TARGET_MASK_68020, "" }, \
437 { "68000", -TARGET_MASK_68020, "Compile for the 68000" }, \
438 { "", TARGET_MASK_68020, "" }} */
440 #define TARGET_SWITCHES \
442 { "cond-move", -MASK_NO_COND_MOVE, \
443 N_("Enable use of conditional move instructions") }, \
445 { "no-cond-move", MASK_NO_COND_MOVE, \
446 N_("Disable use of conditional move instructions") }, \
448 { "debug-arg", MASK_DEBUG_ARG, \
449 N_("Debug argument support in compiler") }, \
451 { "debug-stack", MASK_DEBUG_STACK, \
452 N_("Debug stack support in compiler") }, \
454 { "debug-addr", MASK_DEBUG_ADDR, \
455 N_("Debug memory address support in compiler") }, \
457 { "asm-optimize", 0, \
458 N_("Make adjacent short instructions parallel if possible.") }, \
460 { "no-asm-optimize", 0, \
461 N_("Do not make adjacent short instructions parallel.") }, \
464 N_("Link programs/data to be in external memory by default") }, \
467 N_("Link programs/data to be in external memory by default") }, \
470 N_("Link programs/data to be in onchip memory by default") }, \
472 { "", TARGET_DEFAULT, "" }, \
475 /* This macro is similar to `TARGET_SWITCHES' but defines names of command
476 options that have values. Its definition is an initializer with a
477 subgrouping for each command option.
479 Each subgrouping contains a string constant, that defines the fixed part of
480 the option name, the address of a variable, and a description string. The
481 variable, type `char *', is set to the variable part of the given option if
482 the fixed part matches. The actual option name is made by appending `-m' to
485 Here is an example which defines `-mshort-data-<number>'. If the given
486 option is `-mshort-data-512', the variable `m88k_short_data' will be set to
489 extern char *m88k_short_data;
490 #define TARGET_OPTIONS \
491 { { "short-data-", &m88k_short_data, \
492 "Specify the size of the short data section" } } */
494 #define TARGET_OPTIONS \
496 {"branch-cost=", &d30v_branch_cost_string, \
497 N_("Change the branch costs within the compiler") }, \
499 {"cond-exec=", &d30v_cond_exec_string, \
500 N_("Change the threshold for conversion to conditional execution") }, \
503 /* This macro is a C statement to print on `stderr' a string describing the
504 particular machine description choice. Every machine description should
505 define `TARGET_VERSION'. For example:
508 #define TARGET_VERSION \
509 fprintf (stderr, " (68k, Motorola syntax)");
511 #define TARGET_VERSION \
512 fprintf (stderr, " (68k, MIT syntax)");
514 #define TARGET_VERSION fprintf (stderr, " d30v")
516 /* Sometimes certain combinations of command options do not make sense on a
517 particular target machine. You can define a macro `OVERRIDE_OPTIONS' to
518 take account of this. This macro, if defined, is executed once just after
519 all the command options have been parsed.
521 Don't use this macro to turn on various extra optimizations for `-O'. That
522 is what `OPTIMIZATION_OPTIONS' is for. */
524 #define OVERRIDE_OPTIONS override_options ()
526 /* Some machines may desire to change what optimizations are performed for
527 various optimization levels. This macro, if defined, is executed once just
528 after the optimization level is determined and before the remainder of the
529 command options have been parsed. Values set in this macro are used as the
530 default values for the other command line options.
532 LEVEL is the optimization level specified; 2 if `-O2' is specified, 1 if
533 `-O' is specified, and 0 if neither is specified.
535 SIZE is non-zero if `-Os' is specified, 0 otherwise.
537 You should not use this macro to change options that are not
538 machine-specific. These should uniformly selected by the same optimization
539 level on all supported machines. Use this macro to enable machbine-specific
542 *Do not examine `write_symbols' in this macro!* The debugging options are
543 *not supposed to alter the generated code. */
545 /* #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) */
547 /* Define this macro if debugging can be performed even without a frame
548 pointer. If this macro is defined, GNU CC will turn on the
549 `-fomit-frame-pointer' option whenever `-O' is specified. */
550 #define CAN_DEBUG_WITHOUT_FP
555 /* Define this macro to have the value 1 if the most significant bit in a byte
556 has the lowest number; otherwise define it to have the value zero. This
557 means that bit-field instructions count from the most significant bit. If
558 the machine has no bit-field instructions, then this must still be defined,
559 but it doesn't matter which value it is defined to. This macro need not be
562 This macro does not affect the way structure fields are packed into bytes or
563 words; that is controlled by `BYTES_BIG_ENDIAN'. */
564 #define BITS_BIG_ENDIAN 1
566 /* Define this macro to have the value 1 if the most significant byte in a word
567 has the lowest number. This macro need not be a constant. */
568 #define BYTES_BIG_ENDIAN 1
570 /* Define this macro to have the value 1 if, in a multiword object, the most
571 significant word has the lowest number. This applies to both memory
572 locations and registers; GNU CC fundamentally assumes that the order of
573 words in memory is the same as the order in registers. This macro need not
575 #define WORDS_BIG_ENDIAN 1
577 /* Define this macro if WORDS_BIG_ENDIAN is not constant. This must be a
578 constant value with the same meaning as WORDS_BIG_ENDIAN, which will be used
579 only when compiling libgcc2.c. Typically the value will be set based on
580 preprocessor defines. */
581 /* #define LIBGCC2_WORDS_BIG_ENDIAN */
583 /* Define this macro to have the value 1 if `DFmode', `XFmode' or `TFmode'
584 floating point numbers are stored in memory with the word containing the
585 sign bit at the lowest address; otherwise define it to have the value 0.
586 This macro need not be a constant.
588 You need not define this macro if the ordering is the same as for multi-word
590 /* #define FLOAT_WORDS_BIG_EnNDIAN */
592 /* Define this macro to be the number of bits in an addressable storage unit
593 (byte); normally 8. */
594 #define BITS_PER_UNIT 8
596 /* Number of bits in a word; normally 32. */
597 #define BITS_PER_WORD 32
599 /* Maximum number of bits in a word. If this is undefined, the default is
600 `BITS_PER_WORD'. Otherwise, it is the constant value that is the largest
601 value that `BITS_PER_WORD' can have at run-time. */
602 /* #define MAX_BITS_PER_WORD */
604 /* Number of storage units in a word; normally 4. */
605 #define UNITS_PER_WORD 4
607 /* Minimum number of units in a word. If this is undefined, the default is
608 `UNITS_PER_WORD'. Otherwise, it is the constant value that is the smallest
609 value that `UNITS_PER_WORD' can have at run-time. */
610 /* #define MIN_UNITS_PER_WORD */
612 /* Width of a pointer, in bits. You must specify a value no wider than the
613 width of `Pmode'. If it is not equal to the width of `Pmode', you must
614 define `POINTERS_EXTEND_UNSIGNED'. */
615 #define POINTER_SIZE 32
617 /* A C expression whose value is nonzero if pointers that need to be extended
618 from being `POINTER_SIZE' bits wide to `Pmode' are sign-extended and zero if
619 they are zero-extended.
621 You need not define this macro if the `POINTER_SIZE' is equal to the width
623 /* #define POINTERS_EXTEND_UNSIGNED */
625 /* A macro to update M and UNSIGNEDP when an object whose type is TYPE and
626 which has the specified mode and signedness is to be stored in a register.
627 This macro is only called when TYPE is a scalar type.
629 On most RISC machines, which only have operations that operate on a full
630 register, define this macro to set M to `word_mode' if M is an integer mode
631 narrower than `BITS_PER_WORD'. In most cases, only integer modes should be
632 widened because wider-precision floating-point operations are usually more
633 expensive than their narrower counterparts.
635 For most machines, the macro definition does not change UNSIGNEDP. However,
636 some machines, have instructions that preferentially handle either signed or
637 unsigned quantities of certain modes. For example, on the DEC Alpha, 32-bit
638 loads from memory and 32-bit add instructions sign-extend the result to 64
639 bits. On such machines, set UNSIGNEDP according to which kind of extension
642 Do not define this macro if it would never modify M. */
643 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
645 if (GET_MODE_CLASS (MODE) == MODE_INT \
646 && GET_MODE_SIZE (MODE) < 4) \
650 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
651 be done for outgoing function arguments. */
652 /* #define PROMOTE_FUNCTION_ARGS */
654 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
655 be done for the return value of functions.
657 If this macro is defined, `FUNCTION_VALUE' must perform the same promotions
658 done by `PROMOTE_MODE'. */
659 /* #define PROMOTE_FUNCTION_RETURN */
661 /* Define this macro if the promotion described by `PROMOTE_MODE' should *only*
662 be performed for outgoing function arguments or function return values, as
663 specified by `PROMOTE_FUNCTION_ARGS' and `PROMOTE_FUNCTION_RETURN',
665 /* #define PROMOTE_FOR_CALL_ONLY */
667 /* Normal alignment required for function parameters on the stack, in bits.
668 All stack parameters receive at least this much alignment regardless of data
669 type. On most machines, this is the same as the size of an integer. */
671 #define PARM_BOUNDARY 32
673 /* Define this macro if you wish to preserve a certain alignment for the stack
674 pointer. The definition is a C expression for the desired alignment
677 If `PUSH_ROUNDING' is not defined, the stack will always be aligned to the
678 specified boundary. If `PUSH_ROUNDING' is defined and specifies a less
679 strict alignment than `STACK_BOUNDARY', the stack may be momentarily
680 unaligned while pushing arguments. */
682 #define STACK_BOUNDARY 64
684 /* Alignment required for a function entry point, in bits. */
686 #define FUNCTION_BOUNDARY 64
688 /* Biggest alignment that any data type can require on this machine,
691 #define BIGGEST_ALIGNMENT 64
693 /* Biggest alignment that any structure field can require on this machine, in
694 bits. If defined, this overrides `BIGGEST_ALIGNMENT' for structure fields
696 /* #define BIGGEST_FIELD_ALIGNMENT */
698 /* Biggest alignment supported by the object file format of this machine. Use
699 this macro to limit the alignment which can be specified using the
700 `__attribute__ ((aligned (N)))' construct. If not defined, the default
701 value is `BIGGEST_ALIGNMENT'.
703 Defined in svr4.h. */
704 /* #define MAX_OFILE_ALIGNMENT */
706 /* If defined, a C expression to compute the alignment for a static variable.
707 TYPE is the data type, and BASIC-ALIGN is the alignment that the object
708 would ordinarily have. The value of this macro is used instead of that
709 alignment to align the object.
711 If this macro is not defined, then BASIC-ALIGN is used.
713 One use of this macro is to increase alignment of medium-size data to make
714 it all fit in fewer cache lines. Another is to cause character arrays to be
715 word-aligned so that `strcpy' calls that copy constants to character arrays
716 can be done inline. */
718 #define DATA_ALIGNMENT(TYPE, ALIGN) \
719 (TREE_CODE (TYPE) == ARRAY_TYPE \
720 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
721 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
723 /* If defined, a C expression to compute the alignment given to a constant that
724 is being placed in memory. CONSTANT is the constant and BASIC-ALIGN is the
725 alignment that the object would ordinarily have. The value of this macro is
726 used instead of that alignment to align the object.
728 If this macro is not defined, then BASIC-ALIGN is used.
730 The typical use of this macro is to increase alignment for string constants
731 to be word aligned so that `strcpy' calls that copy constants can be done
734 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
735 (TREE_CODE (EXP) == STRING_CST \
736 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
738 /* Alignment in bits to be given to a structure bit field that follows an empty
739 field such as `int : 0;'.
741 Note that `PCC_BITFIELD_TYPE_MATTERS' also affects the alignment that
742 results from an empty field. */
743 /* #define EMPTY_FIELD_BOUNDARY */
745 /* Number of bits which any structure or union's size must be a multiple of.
746 Each structure or union's size is rounded up to a multiple of this.
748 If you do not define this macro, the default is the same as `BITS_PER_UNIT'. */
749 /* #define STRUCTURE_SIZE_BOUNDARY */
751 /* Define this macro to be the value 1 if instructions will fail to work if
752 given data not on the nominal alignment. If instructions will merely go
753 slower in that case, define this macro as 0. */
755 #define STRICT_ALIGNMENT 1
757 /* Define this if you wish to imitate the way many other C compilers handle
758 alignment of bitfields and the structures that contain them.
760 The behavior is that the type written for a bitfield (`int', `short', or
761 other integer type) imposes an alignment for the entire structure, as if the
762 structure really did contain an ordinary field of that type. In addition,
763 the bitfield is placed within the structure so that it would fit within such
764 a field, not crossing a boundary for it.
766 Thus, on most machines, a bitfield whose type is written as `int' would not
767 cross a four-byte boundary, and would force four-byte alignment for the
768 whole structure. (The alignment used may not be four bytes; it is
769 controlled by the other alignment parameters.)
771 If the macro is defined, its definition should be a C expression; a nonzero
772 value for the expression enables this behavior.
774 Note that if this macro is not defined, or its value is zero, some bitfields
775 may cross more than one alignment boundary. The compiler can support such
776 references if there are `insv', `extv', and `extzv' insns that can directly
779 The other known way of making bitfields work is to define
780 `STRUCTURE_SIZE_BOUNDARY' as large as `BIGGEST_ALIGNMENT'. Then every
781 structure can be accessed with fullwords.
783 Unless the machine has bitfield instructions or you define
784 `STRUCTURE_SIZE_BOUNDARY' that way, you must define
785 `PCC_BITFIELD_TYPE_MATTERS' to have a nonzero value.
787 If your aim is to make GNU CC use the same conventions for laying out
788 bitfields as are used by another compiler, here is how to investigate what
789 the other compiler does. Compile and run this program:
807 printf ("Size of foo1 is %d\n",
808 sizeof (struct foo1));
809 printf ("Size of foo2 is %d\n",
810 sizeof (struct foo2));
814 If this prints 2 and 5, then the compiler's behavior is what you would get
815 from `PCC_BITFIELD_TYPE_MATTERS'.
817 Defined in svr4.h. */
819 #define PCC_BITFIELD_TYPE_MATTERS 1
821 /* Like PCC_BITFIELD_TYPE_MATTERS except that its effect is limited to aligning
822 a bitfield within the structure. */
823 /* #define BITFIELD_NBYTES_LIMITED */
825 /* Define this macro as an expression for the overall size of a structure
826 (given by STRUCT as a tree node) when the size computed from the fields is
827 SIZE and the alignment is ALIGN.
829 The default is to round SIZE up to a multiple of ALIGN. */
830 /* #define ROUND_TYPE_SIZE(STRUCT, SIZE, ALIGN) */
832 /* Define this macro as an expression for the alignment of a structure (given
833 by STRUCT as a tree node) if the alignment computed in the usual way is
834 COMPUTED and the alignment explicitly specified was SPECIFIED.
836 The default is to use SPECIFIED if it is larger; otherwise, use the smaller
837 of COMPUTED and `BIGGEST_ALIGNMENT' */
838 /* #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) */
840 /* An integer expression for the size in bits of the largest integer machine
841 mode that should actually be used. All integer machine modes of this size
842 or smaller can be used for structures and unions with the appropriate sizes.
843 If this macro is undefined, `GET_MODE_BITSIZE (DImode)' is assumed. */
844 /* #define MAX_FIXED_MODE_SIZE */
846 /* A C statement to validate the value VALUE (of type `double') for mode MODE.
847 This means that you check whether VALUE fits within the possible range of
848 values for mode MODE on this target machine. The mode MODE is always a mode
849 of class `MODE_FLOAT'. OVERFLOW is nonzero if the value is already known to
852 If VALUE is not valid or if OVERFLOW is nonzero, you should set OVERFLOW to
853 1 and then assign some valid value to VALUE. Allowing an invalid value to
854 go through the compiler can produce incorrect assembler code which may even
855 cause Unix assemblers to crash.
857 This macro need not be defined if there is no work for it to do. */
858 /* #define CHECK_FLOAT_VALUE(MODE, VALUE, OVERFLOW) */
860 /* A code distinguishing the floating point format of the target machine.
861 There are three defined values:
864 This code indicates IEEE floating point. It is the default;
865 there is no need to define this macro when the format is IEEE.
868 This code indicates the peculiar format used on the VAX.
870 UNKNOWN_FLOAT_FORMAT'
871 This code indicates any other format.
873 The value of this macro is compared with `HOST_FLOAT_FORMAT' (*note
874 Config::.) to determine whether the target machine has the same format as
875 the host machine. If any other formats are actually in use on supported
876 machines, new codes should be defined for them.
878 The ordering of the component words of floating point values stored in
879 memory is controlled by `FLOAT_WORDS_BIG_ENDIAN' for the target machine and
880 `HOST_FLOAT_WORDS_BIG_ENDIAN' for the host. */
881 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
884 /* Layout of Source Language Data Types */
886 /* A C expression for the size in bits of the type `int' on the target machine.
887 If you don't define this, the default is one word. */
888 #define INT_TYPE_SIZE 32
890 /* Maximum number for the size in bits of the type `int' on the target machine.
891 If this is undefined, the default is `INT_TYPE_SIZE'. Otherwise, it is the
892 constant value that is the largest value that `INT_TYPE_SIZE' can have at
893 run-time. This is used in `cpp'. */
894 /* #define MAX_INT_TYPE_SIZE */
896 /* A C expression for the size in bits of the type `short' on the target
897 machine. If you don't define this, the default is half a word. (If this
898 would be less than one storage unit, it is rounded up to one unit.) */
899 #define SHORT_TYPE_SIZE 16
901 /* A C expression for the size in bits of the type `long' on the target
902 machine. If you don't define this, the default is one word. */
903 #define LONG_TYPE_SIZE 32
905 /* Maximum number for the size in bits of the type `long' on the target
906 machine. If this is undefined, the default is `LONG_TYPE_SIZE'. Otherwise,
907 it is the constant value that is the largest value that `LONG_TYPE_SIZE' can
908 have at run-time. This is used in `cpp'. */
909 /* #define MAX_LONG_TYPE_SIZE */
911 /* A C expression for the size in bits of the type `long long' on the target
912 machine. If you don't define this, the default is two words. If you want
913 to support GNU Ada on your machine, the value of macro must be at least 64. */
914 #define LONG_LONG_TYPE_SIZE 64
916 /* A C expression for the size in bits of the type `char' on the target
917 machine. If you don't define this, the default is one quarter of a word.
918 (If this would be less than one storage unit, it is rounded up to one unit.) */
919 #define CHAR_TYPE_SIZE 8
921 /* Maximum number for the size in bits of the type `char' on the target
922 machine. If this is undefined, the default is `CHAR_TYPE_SIZE'. Otherwise,
923 it is the constant value that is the largest value that `CHAR_TYPE_SIZE' can
924 have at run-time. This is used in `cpp'. */
925 /* #define MAX_CHAR_TYPE_SIZE */
927 /* A C expression for the size in bits of the type `float' on the target
928 machine. If you don't define this, the default is one word. */
929 #define FLOAT_TYPE_SIZE 32
931 /* A C expression for the size in bits of the type `double' on the target
932 machine. If you don't define this, the default is two words. */
933 #define DOUBLE_TYPE_SIZE 64
935 /* A C expression for the size in bits of the type `long double' on the target
936 machine. If you don't define this, the default is two words. */
937 #define LONG_DOUBLE_TYPE_SIZE 64
939 /* An expression whose value is 1 or 0, according to whether the type `char'
940 should be signed or unsigned by default. The user can always override this
941 default with the options `-fsigned-char' and `-funsigned-char'. */
942 #define DEFAULT_SIGNED_CHAR 1
944 /* A C expression to determine whether to give an `enum' type only as many
945 bytes as it takes to represent the range of possible values of that type. A
946 nonzero value means to do that; a zero value means all `enum' types should
947 be allocated like `int'.
949 If you don't define the macro, the default is 0. */
950 /* #define DEFAULT_SHORT_ENUMS */
952 /* A C expression for a string describing the name of the data type to use for
953 size values. The typedef name `size_t' is defined using the contents of the
956 The string can contain more than one keyword. If so, separate them with
957 spaces, and write first any length keyword, then `unsigned' if appropriate,
958 and finally `int'. The string must exactly match one of the data type names
959 defined in the function `init_decl_processing' in the file `c-decl.c'. You
960 may not omit `int' or change the order--that would cause the compiler to
963 If you don't define this macro, the default is `"long unsigned int"'.
965 Defined in svr4.h. */
966 /* #define SIZE_TYPE */
968 /* A C expression for a string describing the name of the data type to use for
969 the result of subtracting two pointers. The typedef name `ptrdiff_t' is
970 defined using the contents of the string. See `SIZE_TYPE' above for more
973 If you don't define this macro, the default is `"long int"'.
975 Defined in svr4.h. */
976 /* #define PTRDIFF_TYPE */
978 /* A C expression for a string describing the name of the data type to use for
979 wide characters. The typedef name `wchar_t' is defined using the contents
980 of the string. See `SIZE_TYPE' above for more information.
982 If you don't define this macro, the default is `"int"'.
984 Defined in svr4.h. */
985 /* #define WCHAR_TYPE */
987 /* A C expression for the size in bits of the data type for wide characters.
988 This is used in `cpp', which cannot make use of `WCHAR_TYPE'.
990 Defined in svr4.h. */
991 /* #define WCHAR_TYPE_SIZE */
993 /* Maximum number for the size in bits of the data type for wide characters.
994 If this is undefined, the default is `WCHAR_TYPE_SIZE'. Otherwise, it is
995 the constant value that is the largest value that `WCHAR_TYPE_SIZE' can have
996 at run-time. This is used in `cpp'. */
997 /* #define MAX_WCHAR_TYPE_SIZE */
999 /* Define this macro if the compiler can group all the selectors together into
1000 a vector and use just one label at the beginning of the vector. Otherwise,
1001 the compiler must give each selector its own assembler label.
1003 On certain machines, it is important to have a separate label for each
1004 selector because this enables the linker to eliminate duplicate selectors. */
1005 /* #define OBJC_SELECTORS_WITHOUT_LABELS */
1008 /* D30V register layout. */
1010 /* Return true if a value is inside a range */
1011 #define IN_RANGE_P(VALUE, LOW, HIGH) \
1012 (((unsigned)((VALUE) - (LOW))) <= ((unsigned)((HIGH) - (LOW))))
1014 /* General purpose registers. */
1015 #define GPR_FIRST 0 /* First gpr */
1016 #define GPR_LAST (GPR_FIRST + 63) /* Last gpr */
1017 #define GPR_R0 GPR_FIRST /* R0, constant 0 */
1018 #define GPR_ARG_FIRST (GPR_FIRST + 2) /* R2, first argument reg */
1019 #define GPR_ARG_LAST (GPR_FIRST + 17) /* R17, last argument reg */
1020 #define GPR_RET_VALUE GPR_ARG_FIRST /* R2, function return reg */
1021 #define GPR_ATMP_FIRST (GPR_FIRST + 20) /* R20, tmp to save accs */
1022 #define GPR_ATMP_LAST (GPR_FIRST + 21) /* R21, tmp to save accs */
1023 #define GPR_STACK_TMP (GPR_FIRST + 22) /* R22, tmp for saving stack */
1024 #define GPR_RES_FIRST (GPR_FIRST + 32) /* R32, first reserved reg */
1025 #define GPR_RES_LAST (GPR_FIRST + 35) /* R35, last reserved reg */
1026 #define GPR_FP (GPR_FIRST + 61) /* Frame pointer */
1027 #define GPR_LINK (GPR_FIRST + 62) /* Return address register */
1028 #define GPR_SP (GPR_FIRST + 63) /* Stack pointer */
1030 /* Argument register that is eliminated in favor of the frame and/or stack
1031 pointer. Also add register to point to where the return address is
1033 #define SPECIAL_REG_FIRST (GPR_LAST + 1)
1034 #define SPECIAL_REG_LAST (SPECIAL_REG_FIRST)
1035 #define ARG_POINTER_REGNUM (SPECIAL_REG_FIRST + 0)
1036 #define SPECIAL_REG_P(R) ((R) == SPECIAL_REG_FIRST)
1038 #define GPR_OR_SPECIAL_REG_P(R) IN_RANGE_P (R, GPR_FIRST, SPECIAL_REG_LAST)
1039 #define GPR_P(R) IN_RANGE_P (R, GPR_FIRST, GPR_LAST)
1040 #define GPR_OR_PSEUDO_P(R) (GPR_OR_SPECIAL_REG_P (R) \
1041 || (R) >= FIRST_PSEUDO_REGISTER)
1044 #define FLAG_FIRST (SPECIAL_REG_LAST + 1) /* First flag */
1045 #define FLAG_LAST (FLAG_FIRST + 7) /* Last flag */
1046 #define FLAG_F0 (FLAG_FIRST) /* F0, used in prediction */
1047 #define FLAG_F1 (FLAG_FIRST + 1) /* F1, used in prediction */
1048 #define FLAG_F2 (FLAG_FIRST + 2) /* F2, general flag */
1049 #define FLAG_F3 (FLAG_FIRST + 3) /* F3, general flag */
1050 #define FLAG_SAT (FLAG_FIRST + 4) /* F4, saturation flag */
1051 #define FLAG_OVERFLOW (FLAG_FIRST + 5) /* F5, overflow flag */
1052 #define FLAG_ACC_OVER (FLAG_FIRST + 6) /* F6, accumulated overflow */
1053 #define FLAG_CARRY (FLAG_FIRST + 7) /* F7, carry/borrow flag */
1054 #define FLAG_BORROW FLAG_CARRY
1056 #define FLAG_P(R) IN_RANGE_P (R, FLAG_FIRST, FLAG_LAST)
1057 #define FLAG_OR_PSEUDO_P(R) (FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1059 #define BR_FLAG_P(R) IN_RANGE_P (R, FLAG_F0, FLAG_F1)
1060 #define BR_FLAG_OR_PSEUDO_P(R) (BR_FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1063 #define ACCUM_FIRST (FLAG_LAST + 1) /* First accumulator */
1064 #define ACCUM_A0 ACCUM_FIRST /* Register A0 */
1065 #define ACCUM_A1 (ACCUM_FIRST + 1) /* Register A1 */
1066 #define ACCUM_LAST (ACCUM_FIRST + 1) /* Last accumulator */
1068 #define ACCUM_P(R) IN_RANGE_P (R, ACCUM_FIRST, ACCUM_LAST)
1069 #define ACCUM_OR_PSEUDO_P(R) (ACCUM_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1071 /* Special registers. Note, we only define the registers that can actually
1073 #define CR_FIRST (ACCUM_LAST + 1) /* First CR */
1074 #define CR_LAST (CR_FIRST + 14) /* Last CR */
1075 #define CR_PSW (CR_FIRST + 0) /* CR0, Program status word */
1076 #define CR_BPSW (CR_FIRST + 1) /* CR1, Backup PSW */
1077 #define CR_PC (CR_FIRST + 2) /* CR2, Program counter */
1078 #define CR_BPC (CR_FIRST + 3) /* CR3, Backup PC */
1079 #define CR_DPSW (CR_FIRST + 4) /* CR4, Debug PSW */
1080 #define CR_DPC (CR_FIRST + 5) /* CR5, Debug PC */
1081 #define CR_RPT_C (CR_FIRST + 6) /* CR7, loop count register */
1082 #define CR_RPT_S (CR_FIRST + 7) /* CR8, loop start address */
1083 #define CR_RPT_E (CR_FIRST + 8) /* CR9, loop end address */
1084 #define CR_MOD_S (CR_FIRST + 9) /* CR10, modulo address start*/
1085 #define CR_MOD_E (CR_FIRST + 10) /* CR11, modulo address */
1086 #define CR_IBA (CR_FIRST + 11) /* CR14, Interrupt break addr */
1087 #define CR_EIT_VB (CR_FIRST + 12) /* CR15, EIT vector address */
1088 #define CR_INT_S (CR_FIRST + 13) /* CR16, Interrupt status */
1089 #define CR_INT_M (CR_FIRST + 14) /* CR17, Interrupt mask */
1091 #define CR_P(R) IN_RANGE_P (R, CR_FIRST, CR_LAST)
1092 #define CR_OR_PSEUDO_P(R) (CR_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1095 /* Register Basics */
1097 /* Number of hardware registers known to the compiler. They receive numbers 0
1098 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
1099 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
1100 #define FIRST_PSEUDO_REGISTER (CR_LAST + 1)
1102 /* An initializer that says which registers are used for fixed purposes all
1103 throughout the compiled code and are therefore not available for general
1104 allocation. These would include the stack pointer, the frame pointer
1105 (except on machines where that can be used as a general register when no
1106 frame pointer is needed), the program counter on machines where that is
1107 considered one of the addressable registers, and any other numbered register
1108 with a standard use.
1110 This information is expressed as a sequence of numbers, separated by commas
1111 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
1114 The table initialized from this macro, and the table initialized by the
1115 following one, may be overridden at run time either automatically, by the
1116 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
1117 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
1118 #define FIXED_REGISTERS \
1120 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R0 - R15 */ \
1121 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
1122 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
1123 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
1125 0, 0, 0, 0, 1, 1, 1, 1, /* F0 - F7 */ \
1126 0, 0, /* A0 - A1 */ \
1127 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
1130 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
1131 general) by function calls as well as for fixed registers. This macro
1132 therefore identifies the registers that are not available for general
1133 allocation of values that must live across function calls.
1135 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
1136 saves it on function entry and restores it on function exit, if the register
1137 is used within the function. */
1138 #define CALL_USED_REGISTERS \
1140 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R0 - R15 */ \
1141 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
1142 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
1143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
1145 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - F7 */ \
1146 1, 0, /* A0 - A1 */ \
1147 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
1150 /* Zero or more C statements that may conditionally modify two variables
1151 `fixed_regs' and `call_used_regs' (both of type `char []') after they have
1152 been initialized from the two preceding macros.
1154 This is necessary in case the fixed or call-clobbered registers depend on
1157 You need not define this macro if it has no work to do.
1159 If the usage of an entire class of registers depends on the target flags,
1160 you may indicate this to GCC by using this macro to modify `fixed_regs' and
1161 `call_used_regs' to 1 for each of the registers in the classes which should
1162 not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return
1163 `NO_REGS' if it is called with a letter for a class that shouldn't be used.
1165 (However, if this class is not included in `GENERAL_REGS' and all of the
1166 insn patterns whose constraints permit this class are controlled by target
1167 switches, then GCC will automatically avoid using these registers when the
1168 target switches are opposed to them.) */
1169 /* #define CONDITIONAL_REGISTER_USAGE */
1171 /* If this macro is defined and has a nonzero value, it means that `setjmp' and
1172 related functions fail to save the registers, or that `longjmp' fails to
1173 restore them. To compensate, the compiler avoids putting variables in
1174 registers in functions that use `setjmp'. */
1175 /* #define NON_SAVING_SETJMP */
1177 /* Define this macro if the target machine has register windows. This C
1178 expression returns the register number as seen by the called function
1179 corresponding to the register number OUT as seen by the calling function.
1180 Return OUT if register number OUT is not an outbound register. */
1181 /* #define INCOMING_REGNO(OUT) */
1183 /* Define this macro if the target machine has register windows. This C
1184 expression returns the register number as seen by the calling function
1185 corresponding to the register number IN as seen by the called function.
1186 Return IN if register number IN is not an inbound register. */
1187 /* #define OUTGOING_REGNO(IN) */
1190 /* Order of allocation of registers */
1192 /* If defined, an initializer for a vector of integers, containing the numbers
1193 of hard registers in the order in which GNU CC should prefer to use them
1194 (from most preferred to least).
1196 If this macro is not defined, registers are used lowest numbered first (all
1199 One use of this macro is on machines where the highest numbered registers
1200 must always be saved and the save-multiple-registers instruction supports
1201 only sequences of consecutive registers. On such machines, define
1202 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
1203 allocatable register first. */
1205 #define REG_ALLOC_ORDER \
1207 /* volatile registers */ \
1208 GPR_FIRST + 2, GPR_FIRST + 3, GPR_FIRST + 4, GPR_FIRST + 5, \
1209 GPR_FIRST + 6, GPR_FIRST + 7, GPR_FIRST + 8, GPR_FIRST + 9, \
1210 GPR_FIRST + 10, GPR_FIRST + 11, GPR_FIRST + 12, GPR_FIRST + 13, \
1211 GPR_FIRST + 14, GPR_FIRST + 15, GPR_FIRST + 16, GPR_FIRST + 17, \
1212 GPR_FIRST + 18, GPR_FIRST + 19, GPR_FIRST + 20, GPR_FIRST + 21, \
1213 GPR_FIRST + 22, GPR_FIRST + 23, GPR_FIRST + 24, GPR_FIRST + 25, \
1216 /* saved registers */ \
1217 GPR_FIRST + 34, GPR_FIRST + 35, GPR_FIRST + 36, GPR_FIRST + 37, \
1218 GPR_FIRST + 38, GPR_FIRST + 39, GPR_FIRST + 40, GPR_FIRST + 41, \
1219 GPR_FIRST + 42, GPR_FIRST + 43, GPR_FIRST + 44, GPR_FIRST + 45, \
1220 GPR_FIRST + 46, GPR_FIRST + 47, GPR_FIRST + 48, GPR_FIRST + 49, \
1221 GPR_FIRST + 50, GPR_FIRST + 51, GPR_FIRST + 52, GPR_FIRST + 53, \
1222 GPR_FIRST + 54, GPR_FIRST + 55, GPR_FIRST + 56, GPR_FIRST + 57, \
1223 GPR_FIRST + 58, GPR_FIRST + 59, GPR_FIRST + 60, GPR_FIRST + 61, \
1227 FLAG_F2, FLAG_F3, FLAG_F0, FLAG_F1, \
1228 FLAG_SAT, FLAG_OVERFLOW, FLAG_ACC_OVER, FLAG_CARRY, \
1231 ACCUM_FIRST + 0, ACCUM_FIRST + 1, \
1233 /* fixed registers */ \
1234 GPR_FIRST + 0, GPR_FIRST + 26, GPR_FIRST + 27, GPR_FIRST + 28, \
1235 GPR_FIRST + 29, GPR_FIRST + 30, GPR_FIRST + 31, GPR_FIRST + 32, \
1236 GPR_FIRST + 33, GPR_FIRST + 63, \
1237 CR_PSW, CR_BPSW, CR_PC, CR_BPC, \
1238 CR_DPSW, CR_DPC, CR_RPT_C, CR_RPT_S, \
1239 CR_RPT_E, CR_MOD_S, CR_MOD_E, CR_IBA, \
1240 CR_EIT_VB, CR_INT_S, CR_INT_M, \
1241 ARG_POINTER_REGNUM, \
1244 /* A C statement (sans semicolon) to choose the order in which to allocate hard
1245 registers for pseudo-registers local to a basic block.
1247 Store the desired register order in the array `reg_alloc_order'. Element 0
1248 should be the register to allocate first; element 1, the next register; and
1251 The macro body should not assume anything about the contents of
1252 `reg_alloc_order' before execution of the macro.
1254 On most machines, it is not necessary to define this macro. */
1255 /* #define ORDER_REGS_FOR_LOCAL_ALLOC */
1258 /* How Values Fit in Registers */
1260 /* A C expression for the number of consecutive hard registers, starting at
1261 register number REGNO, required to hold a value of mode MODE.
1263 On a machine where all registers are exactly one word, a suitable definition
1266 #define HARD_REGNO_NREGS(REGNO, MODE) \
1267 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1268 / UNITS_PER_WORD)) */
1270 #define HARD_REGNO_NREGS(REGNO, MODE) \
1271 (ACCUM_P (REGNO) ? ((GET_MODE_SIZE (MODE) + 2*UNITS_PER_WORD - 1) \
1272 / (2*UNITS_PER_WORD)) \
1273 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1276 /* A C expression that is nonzero if it is permissible to store a value of mode
1277 MODE in hard register number REGNO (or in several registers starting with
1278 that one). For a machine where all registers are equivalent, a suitable
1281 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
1283 It is not necessary for this macro to check for the numbers of fixed
1284 registers, because the allocation mechanism considers them to be always
1287 On some machines, double-precision values must be kept in even/odd register
1288 pairs. The way to implement that is to define this macro to reject odd
1289 register numbers for such modes.
1291 The minimum requirement for a mode to be OK in a register is that the
1292 `movMODE' instruction pattern support moves between the register and any
1293 other hard register for which the mode is OK; and that moving a value into
1294 the register and back out not alter it.
1296 Since the same instruction used to move `SImode' will work for all narrower
1297 integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK'
1298 to distinguish between these modes, provided you define patterns `movhi',
1299 etc., to take advantage of this. This is useful because of the interaction
1300 between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for
1301 all integer modes to be tieable.
1303 Many machines have special registers for floating point arithmetic. Often
1304 people assume that floating point machine modes are allowed only in floating
1305 point registers. This is not true. Any registers that can hold integers
1306 can safely *hold* a floating point machine mode, whether or not floating
1307 arithmetic can be done on it in those registers. Integer move instructions
1308 can be used to move the values.
1310 On some machines, though, the converse is true: fixed-point machine modes
1311 may not go in floating registers. This is true if the floating registers
1312 normalize any value stored in them, because storing a non-floating value
1313 there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject
1314 fixed-point machine modes in floating registers. But if the floating
1315 registers do not automatically normalize, if you can store any bit pattern
1316 in one and retrieve it unchanged without a trap, then any machine mode may
1317 go in a floating register, so you can define this macro to say so.
1319 The primary significance of special floating registers is rather that they
1320 are the registers acceptable in floating point arithmetic instructions.
1321 However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by
1322 writing the proper constraints for those instructions.
1324 On some machines, the floating registers are especially slow to access, so
1325 that it is better to store a value in a stack frame than in such a register
1326 if floating point arithmetic is not being done. As long as the floating
1327 registers are not in class `GENERAL_REGS', they will not be used unless some
1328 pattern's constraint asks for one. */
1330 extern unsigned char hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
1331 #define HARD_REGNO_MODE_OK(REGNO, MODE) hard_regno_mode_ok[ (int)MODE ][ REGNO ]
1333 /* A C expression that is nonzero if it is desirable to choose register
1334 allocation so as to avoid move instructions between a value of mode MODE1
1335 and a value of mode MODE2.
1337 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
1338 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
1341 extern unsigned char modes_tieable_p[];
1342 #define MODES_TIEABLE_P(MODE1, MODE2) \
1343 modes_tieable_p[ (((int)(MODE1)) * (NUM_MACHINE_MODES)) + (int)(MODE2) ]
1345 /* Define this macro if the compiler should avoid copies to/from CCmode
1346 registers. You should only define this macro if support fo copying to/from
1347 CCmode is incomplete. */
1349 /* On the D30V, copying to/from CCmode is complete, but since there are only
1350 two CC registers usable for conditional tests, this helps gcse not compound
1351 the reload problem. */
1352 #define AVOID_CCMODE_COPIES
1355 /* Handling Leaf Functions */
1357 /* A C initializer for a vector, indexed by hard register number, which
1358 contains 1 for a register that is allowable in a candidate for leaf function
1361 If leaf function treatment involves renumbering the registers, then the
1362 registers marked here should be the ones before renumbering--those that GNU
1363 CC would ordinarily allocate. The registers which will actually be used in
1364 the assembler code, after renumbering, should not be marked with 1 in this
1367 Define this macro only if the target machine offers a way to optimize the
1368 treatment of leaf functions. */
1369 /* #define LEAF_REGISTERS */
1371 /* A C expression whose value is the register number to which REGNO should be
1372 renumbered, when a function is treated as a leaf function.
1374 If REGNO is a register number which should not appear in a leaf function
1375 before renumbering, then the expression should yield -1, which will cause
1376 the compiler to abort.
1378 Define this macro only if the target machine offers a way to optimize the
1379 treatment of leaf functions, and registers need to be renumbered to do this. */
1380 /* #define LEAF_REG_REMAP(REGNO) */
1383 /* Registers That Form a Stack. */
1385 /* Define this if the machine has any stack-like registers. */
1386 /* #define STACK_REGS */
1388 /* The number of the first stack-like register. This one is the top
1390 /* #define FIRST_STACK_REG */
1392 /* The number of the last stack-like register. This one is the
1393 bottom of the stack. */
1394 /* #define LAST_STACK_REG */
1397 /* Register Classes */
1399 /* An enumeral type that must be defined with all the register class names as
1400 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
1401 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
1402 which is not a register class but rather tells how many classes there are.
1404 Each register class has a number, which is the value of casting the class
1405 name to type `int'. The number serves as an index in many of the tables
1424 #define GENERAL_REGS GPR_REGS
1426 /* The number of distinct register classes, defined as follows:
1428 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
1429 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
1431 /* An initializer containing the names of the register classes as C string
1432 constants. These names are used in writing some of the debugging dumps. */
1433 #define REG_CLASS_NAMES \
1439 "OTHER_FLAG_REGS", \
1449 /* Create mask bits for 3rd word of REG_CLASS_CONTENTS */
1450 #define MASK_WORD3(REG) ((long)1 << ((REG) - 64))
1453 #define REPEAT_MASK MASK_WORD3 (CR_RPT_C)
1454 #define CR_MASK (MASK_WORD3 (CR_PSW) | MASK_WORD3 (CR_BPSW) \
1455 | MASK_WORD3 (CR_PC) | MASK_WORD3 (CR_BPC) \
1456 | MASK_WORD3 (CR_DPSW) | MASK_WORD3 (CR_DPC) \
1457 | MASK_WORD3 (CR_RPT_C) | MASK_WORD3 (CR_RPT_S) \
1458 | MASK_WORD3 (CR_RPT_E) | MASK_WORD3 (CR_MOD_S) \
1459 | MASK_WORD3 (CR_MOD_E) | MASK_WORD3 (CR_IBA) \
1460 | MASK_WORD3 (CR_EIT_VB) | MASK_WORD3 (CR_INT_S) \
1461 | MASK_WORD3 (CR_INT_M))
1463 #define ACCUM_MASK (MASK_WORD3 (ACCUM_A0) | MASK_WORD3 (ACCUM_A1))
1464 #define OTHER_FLAG_MASK (MASK_WORD3 (FLAG_F2) | MASK_WORD3 (FLAG_F3) \
1465 | MASK_WORD3 (FLAG_SAT) | MASK_WORD3 (FLAG_OVERFLOW) \
1466 | MASK_WORD3 (FLAG_ACC_OVER) | MASK_WORD3 (FLAG_CARRY))
1468 #define F0_MASK MASK_WORD3 (FLAG_F0)
1469 #define F1_MASK MASK_WORD3 (FLAG_F1)
1470 #define BR_FLAG_MASK (F0_MASK | F1_MASK)
1471 #define FLAG_MASK (BR_FLAG_MASK | OTHER_FLAG_MASK)
1472 #define SPECIAL_MASK MASK_WORD3 (ARG_POINTER_REGNUM)
1474 #define ALL_MASK (CR_MASK | ACCUM_MASK | FLAG_MASK | SPECIAL_MASK)
1476 /* An initializer containing the contents of the register classes, as integers
1477 which are bit masks. The Nth integer specifies the contents of class N.
1478 The way the integer MASK is interpreted is that register R is in the class
1479 if `MASK & (1 << R)' is 1.
1481 When the machine has more than 32 registers, an integer does not suffice.
1482 Then the integers are replaced by sub-initializers, braced groupings
1483 containing several integers. Each sub-initializer must be suitable as an
1484 initializer for the type `HARD_REG_SET' which is defined in
1485 `hard-reg-set.h'. */
1486 #define REG_CLASS_CONTENTS \
1488 { 0x00000000, 0x00000000, NO_MASK }, /* NO_REGS */ \
1489 { 0x00000000, 0x00000000, REPEAT_MASK }, /* REPEAT_REGS */ \
1490 { 0x00000000, 0x00000000, CR_MASK }, /* CR_REGS */ \
1491 { 0x00000000, 0x00000000, ACCUM_MASK }, /* ACCUM_REGS */ \
1492 { 0x00000000, 0x00000000, OTHER_FLAG_MASK }, /* OTHER_FLAG_REGS */ \
1493 { 0x00000000, 0x00000000, F0_MASK }, /* F0_REGS */ \
1494 { 0x00000000, 0x00000000, F1_MASK }, /* F1_REGS */ \
1495 { 0x00000000, 0x00000000, BR_FLAG_MASK }, /* BR_FLAG_REGS */ \
1496 { 0x00000000, 0x00000000, FLAG_MASK }, /* FLAG_REGS */ \
1497 { 0xfffffffc, 0x3fffffff, NO_MASK }, /* EVEN_REGS */ \
1498 { 0xffffffff, 0xffffffff, SPECIAL_MASK }, /* GPR_REGS */ \
1499 { 0xffffffff, 0xffffffff, ALL_MASK }, /* ALL_REGS */ \
1502 /* A C expression whose value is a register class containing hard register
1503 REGNO. In general there is more than one such class; choose a class which
1504 is "minimal", meaning that no smaller class also contains the register. */
1506 extern enum reg_class regno_reg_class[];
1507 #define REGNO_REG_CLASS(REGNO) regno_reg_class[ (REGNO) ]
1509 /* A macro whose definition is the name of the class to which a valid base
1510 register must belong. A base register is one used in an address which is
1511 the register value plus a displacement. */
1512 #define BASE_REG_CLASS GPR_REGS
1514 /* A macro whose definition is the name of the class to which a valid index
1515 register must belong. An index register is one used in an address where its
1516 value is either multiplied by a scale factor or added to another register
1517 (as well as added to a displacement). */
1518 #define INDEX_REG_CLASS GPR_REGS
1520 /* A C expression which defines the machine-dependent operand constraint
1521 letters for register classes. If CHAR is such a letter, the value should be
1522 the register class corresponding to it. Otherwise, the value should be
1523 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
1524 will not be passed to this macro; you do not need to handle it.
1526 The following letters are unavailable, due to being used as
1531 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
1532 'Q', 'R', 'S', 'T', 'U'
1534 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
1536 extern enum reg_class reg_class_from_letter[];
1537 #define REG_CLASS_FROM_LETTER(CHAR) reg_class_from_letter[ CHAR ]
1539 /* A C expression which is nonzero if register number NUM is suitable for use
1540 as a base register in operand addresses. It may be either a suitable hard
1541 register or a pseudo register that has been allocated such a hard register. */
1543 #define REGNO_OK_FOR_BASE_P(NUM) \
1544 ((NUM) < FIRST_PSEUDO_REGISTER \
1546 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
1549 /* A C expression which is nonzero if register number NUM is suitable for use
1550 as an index 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 The difference between an index register and a base register is that the
1554 index register may be scaled. If an address involves the sum of two
1555 registers, neither one of them scaled, then either one may be labeled the
1556 "base" and the other the "index"; but whichever labeling is used must fit
1557 the machine's constraints of which registers may serve in each capacity.
1558 The compiler will try both labelings, looking for one that is valid, and
1559 will reload one or both registers only if neither labeling works. */
1561 #define REGNO_OK_FOR_INDEX_P(NUM) \
1562 ((NUM) < FIRST_PSEUDO_REGISTER \
1564 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
1566 /* A C expression that places additional restrictions on the register class to
1567 use when it is necessary to copy value X into a register in class CLASS.
1568 The value is a register class; perhaps CLASS, or perhaps another, smaller
1569 class. On many machines, the following definition is safe:
1571 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
1573 Sometimes returning a more restrictive class makes better code. For
1574 example, on the 68000, when X is an integer constant that is in range for a
1575 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
1576 as CLASS includes the data registers. Requiring a data register guarantees
1577 that a `moveq' will be used.
1579 If X is a `const_double', by returning `NO_REGS' you can force X into a
1580 memory constant. This is useful on certain machines where immediate
1581 floating values cannot be loaded into certain kinds of registers. */
1582 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
1584 /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input
1585 reloads. If you don't define this macro, the default is to use CLASS,
1587 /* #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) */
1589 /* A C expression that places additional restrictions on the register class to
1590 use when it is necessary to be able to hold a value of mode MODE in a reload
1591 register for which class CLASS would ordinarily be used.
1593 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are
1594 certain modes that simply can't go in certain reload classes.
1596 The value is a register class; perhaps CLASS, or perhaps another, smaller
1599 Don't define this macro unless the target machine has limitations which
1600 require the macro to do something nontrivial. */
1601 /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */
1603 /* Many machines have some registers that cannot be copied directly to or from
1604 memory or even from other types of registers. An example is the `MQ'
1605 register, which on most machines, can only be copied to or from general
1606 registers, but not memory. Some machines allow copying all registers to and
1607 from memory, but require a scratch register for stores to some memory
1608 locations (e.g., those with symbolic address on the RT, and those with
1609 certain symbolic address on the Sparc when compiling PIC). In some cases,
1610 both an intermediate and a scratch register are required.
1612 You should define these macros to indicate to the reload phase that it may
1613 need to allocate at least one register for a reload in addition to the
1614 register to contain the data. Specifically, if copying X to a register
1615 CLASS in MODE requires an intermediate register, you should define
1616 `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of
1617 whose registers can be used as intermediate registers or scratch registers.
1619 If copying a register CLASS in MODE to X requires an intermediate or scratch
1620 register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the
1621 largest register class required. If the requirements for input and output
1622 reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used
1623 instead of defining both macros identically.
1625 The values returned by these macros are often `GENERAL_REGS'. Return
1626 `NO_REGS' if no spare register is needed; i.e., if X can be directly copied
1627 to or from a register of CLASS in MODE without requiring a scratch register.
1628 Do not define this macro if it would always return `NO_REGS'.
1630 If a scratch register is required (either with or without an intermediate
1631 register), you should define patterns for `reload_inM' or `reload_outM', as
1632 required (*note Standard Names::.. These patterns, which will normally be
1633 implemented with a `define_expand', should be similar to the `movM'
1634 patterns, except that operand 2 is the scratch register.
1636 Define constraints for the reload register and scratch register that contain
1637 a single register class. If the original reload register (whose class is
1638 CLASS) can meet the constraint given in the pattern, the value returned by
1639 these macros is used for the class of the scratch register. Otherwise, two
1640 additional reload registers are required. Their classes are obtained from
1641 the constraints in the insn pattern.
1643 X might be a pseudo-register or a `subreg' of a pseudo-register, which could
1644 either be in a hard register or in memory. Use `true_regnum' to find out;
1645 it will return -1 if the pseudo is in memory and the hard register number if
1646 it is in a register.
1648 These macros should not be used in the case where a particular class of
1649 registers can only be copied to memory and not to another class of
1650 registers. In that case, secondary reload registers are not needed and
1651 would not be helpful. Instead, a stack location must be used to perform the
1652 copy and the `movM' pattern should use memory as a intermediate storage.
1653 This case often occurs between floating-point and general registers. */
1655 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
1656 ((CLASS) == GPR_REGS ? NO_REGS \
1657 : (CLASS) == EVEN_REGS ? NO_REGS \
1658 : (CLASS) == ACCUM_REGS ? EVEN_REGS \
1661 /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */
1662 /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */
1664 /* Certain machines have the property that some registers cannot be copied to
1665 some other registers without using memory. Define this macro on those
1666 machines to be a C expression that is non-zero if objects of mode M in
1667 registers of CLASS1 can only be copied to registers of class CLASS2 by
1668 storing a register of CLASS1 into memory and loading that memory location
1669 into a register of CLASS2.
1671 Do not define this macro if its value would always be zero. */
1672 /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */
1674 /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a
1675 stack slot for a memory location needed for register copies. If this macro
1676 is defined, the compiler instead uses the memory location defined by this
1679 Do not define this macro if you do not define
1680 `SECONDARY_MEMORY_NEEDED'. */
1681 /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */
1683 /* When the compiler needs a secondary memory location to copy between two
1684 registers of mode MODE, it normally allocates sufficient memory to hold a
1685 quantity of `BITS_PER_WORD' bits and performs the store and load operations
1686 in a mode that many bits wide and whose class is the same as that of MODE.
1688 This is right thing to do on most machines because it ensures that all bits
1689 of the register are copied and prevents accesses to the registers in a
1690 narrower mode, which some machines prohibit for floating-point registers.
1692 However, this default behavior is not correct on some machines, such as the
1693 DEC Alpha, that store short integers in floating-point registers differently
1694 than in integer registers. On those machines, the default widening will not
1695 work correctly and you must define this macro to suppress that widening in
1696 some cases. See the file `alpha.h' for details.
1698 Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or
1699 if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for
1701 /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */
1703 /* Normally the compiler avoids choosing registers that have been explicitly
1704 mentioned in the rtl as spill registers (these registers are normally those
1705 used to pass parameters and return values). However, some machines have so
1706 few registers of certain classes that there would not be enough registers to
1707 use as spill registers if this were done.
1709 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero value on
1710 these machines. When this macro has a non-zero value, the compiler allows
1711 registers explicitly used in the rtl to be used as spill registers but
1712 avoids extending the lifetime of these registers.
1714 It is always safe to define this macro with a non-zero value, but if you
1715 unnecessarily define it, you will reduce the amount of optimizations that
1716 can be performed in some cases. If you do not define this macro with a
1717 non-zero value when it is required, the compiler will run out of spill
1718 registers and print a fatal error message. For most machines, you should
1719 not define this macro at all. */
1720 /* #define SMALL_REGISTER_CLASSES */
1722 /* A C expression whose value is nonzero if pseudos that have been assigned to
1723 registers of class CLASS would likely be spilled because registers of CLASS
1724 are needed for spill registers.
1726 The default value of this macro returns 1 if CLASS has exactly one register
1727 and zero otherwise. On most machines, this default should be used. Only
1728 define this macro to some other expression if pseudo allocated by
1729 `local-alloc.c' end up in memory because their hard registers were needed
1730 for spill registers. If this macro returns nonzero for those classes, those
1731 pseudos will only be allocated by `global.c', which knows how to reallocate
1732 the pseudo to another register. If there would not be another register
1733 available for reallocation, you should not change the definition of this
1734 macro since the only effect of such a definition would be to slow down
1735 register allocation. */
1736 #define CLASS_LIKELY_SPILLED_P(CLASS) \
1737 ((CLASS) != GPR_REGS && (CLASS) != EVEN_REGS)
1739 /* A C expression for the maximum number of consecutive registers of
1740 class CLASS needed to hold a value of mode MODE.
1742 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
1743 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
1744 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
1746 This macro helps control the handling of multiple-word values in
1749 #define CLASS_MAX_NREGS(CLASS, MODE) \
1750 (((CLASS) == ACCUM_REGS) \
1751 ? ((GET_MODE_SIZE (MODE) + 8 - 1) / 8) \
1752 : ((GET_MODE_SIZE (MODE) + 4 - 1) / 4))
1754 /* A C expression that defines the machine-dependent operand constraint letters
1755 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
1756 If C is one of those letters, the expression should check that VALUE, an
1757 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
1758 is not one of those letters, the value should be 0 regardless of VALUE. */
1759 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1760 ((C) == 'I' ? IN_RANGE_P (VALUE, -32, 31) \
1761 : (C) == 'J' ? IN_RANGE_P (VALUE, 0, 31) \
1762 : (C) == 'K' ? IN_RANGE_P (exact_log2 (VALUE), 0, 31) \
1763 : (C) == 'L' ? IN_RANGE_P (exact_log2 (~ (VALUE)), 0, 31) \
1764 : (C) == 'M' ? ((VALUE) == 32) \
1765 : (C) == 'N' ? ((VALUE) == 1) \
1766 : (C) == 'O' ? ((VALUE) == 0) \
1767 : (C) == 'P' ? IN_RANGE_P (VALUE, 32, 63) \
1770 /* A C expression that defines the machine-dependent operand constraint letters
1771 (`G', `H') that specify particular ranges of `const_double' values.
1773 If C is one of those letters, the expression should check that VALUE, an RTX
1774 of code `const_double', is in the appropriate range and return 1 if so, 0
1775 otherwise. If C is not one of those letters, the value should be 0
1776 regardless of VALUE.
1778 `const_double' is used for all floating-point constants and for `DImode'
1779 fixed-point constants. A given letter can accept either or both kinds of
1780 values. It can use `GET_MODE' to distinguish between these kinds. */
1781 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
1782 ((C) == 'G' ? (CONST_DOUBLE_LOW (VALUE) == 0 \
1783 && CONST_DOUBLE_HIGH (VALUE) == 0) \
1784 : (C) == 'H' ? FALSE \
1787 /* A C expression that defines the optional machine-dependent constraint
1788 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
1789 types of operands, usually memory references, for the target machine.
1790 Normally this macro will not be defined. If it is required for a particular
1791 target machine, it should return 1 if VALUE corresponds to the operand type
1792 represented by the constraint letter C. If C is not defined as an extra
1793 constraint, the value returned should be 0 regardless of VALUE.
1795 For example, on the ROMP, load instructions cannot have their output in r0
1796 if the memory reference contains a symbolic address. Constraint letter `Q'
1797 is defined as representing a memory address that does *not* contain a
1798 symbolic address. An alternative is specified with a `Q' constraint on the
1799 input and `r' on the output. The next alternative specifies `m' on the
1800 input and a register class that does not include r0 on the output. */
1802 #define EXTRA_CONSTRAINT(VALUE, C) \
1803 (((C) == 'Q') ? short_memory_operand ((VALUE), GET_MODE (VALUE)) \
1804 : ((C) == 'R') ? single_reg_memory_operand ((VALUE), GET_MODE (VALUE)) \
1805 : ((C) == 'S') ? const_addr_memory_operand ((VALUE), GET_MODE (VALUE)) \
1806 : ((C) == 'T') ? long_memory_operand ((VALUE), GET_MODE (VALUE)) \
1807 : ((C) == 'U') ? FALSE \
1811 /* Basic Stack Layout */
1815 /* Structure used to define the d30v stack */
1816 typedef struct d30v_stack {
1817 int varargs_p; /* whether this is a varargs function */
1818 int varargs_size; /* size to hold varargs args passed in regs */
1819 int vars_size; /* variable save area size */
1820 int parm_size; /* outgoing parameter size */
1821 int gpr_size; /* size of saved GPR registers */
1822 int accum_size; /* size of saved ACCUM registers */
1823 int total_size; /* total bytes allocated for stack */
1824 /* which registers are to be saved */
1825 int save_offset; /* offset from new sp to start saving vars at */
1826 int link_offset; /* offset r62 is saved at */
1827 int memrefs_varargs; /* # of 2 word memory references for varargs */
1828 int memrefs_2words; /* # of 2 word memory references */
1829 int memrefs_1word; /* # of 1 word memory references */
1830 /* 1 for ldw/stw ops; 2 for ld2w/st2w ops */
1831 unsigned char save_p[FIRST_PSEUDO_REGISTER];
1834 /* Define this macro if pushing a word onto the stack moves the stack pointer
1835 to a smaller address.
1837 When we say, "define this macro if ...," it means that the compiler checks
1838 this macro only with `#ifdef' so the precise definition used does not
1840 #define STACK_GROWS_DOWNWARD 1
1842 /* Define this macro if the addresses of local variable slots are at negative
1843 offsets from the frame pointer. */
1844 /* #define FRAME_GROWS_DOWNWARD */
1846 /* Define this macro if successive arguments to a function occupy decreasing
1847 addresses on the stack. */
1848 /* #define ARGS_GROW_DOWNWARD */
1850 /* Offset from the frame pointer to the first local variable slot to be
1853 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the
1854 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by
1855 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */
1857 #define STARTING_FRAME_OFFSET \
1858 (D30V_ALIGN (current_function_outgoing_args_size, \
1859 (STACK_BOUNDARY / BITS_PER_UNIT)))
1861 /* Offset from the stack pointer register to the first location at which
1862 outgoing arguments are placed. If not specified, the default value of zero
1863 is used. This is the proper value for most machines.
1865 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1866 location at which outgoing arguments are placed. */
1867 /* #define STACK_POINTER_OFFSET */
1869 /* Offset from the argument pointer register to the first argument's address.
1870 On some machines it may depend on the data type of the function.
1872 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1873 argument's address. */
1874 #define FIRST_PARM_OFFSET(FUNDECL) 0
1876 /* Offset from the stack pointer register to an item dynamically allocated on
1877 the stack, e.g., by `alloca'.
1879 The default value for this macro is `STACK_POINTER_OFFSET' plus the length
1880 of the outgoing arguments. The default is correct for most machines. See
1881 `function.c' for details. */
1882 /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */
1884 /* A C expression whose value is RTL representing the address in a stack frame
1885 where the pointer to the caller's frame is stored. Assume that FRAMEADDR is
1886 an RTL expression for the address of the stack frame itself.
1888 If you don't define this macro, the default is to return the value of
1889 FRAMEADDR--that is, the stack frame address is also the address of the stack
1890 word that points to the previous frame. */
1891 /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */
1893 /* If defined, a C expression that produces the machine-specific code to setup
1894 the stack so that arbitrary frames can be accessed. For example, on the
1895 Sparc, we must flush all of the register windows to the stack before we can
1896 access arbitrary stack frames. This macro will seldom need to be defined. */
1897 /* #define SETUP_FRAME_ADDRESSES() */
1899 /* A C expression whose value is RTL representing the value of the return
1900 address for the frame COUNT steps up from the current frame, after the
1901 prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame
1902 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is
1905 The value of the expression must always be the correct address when COUNT is
1906 zero, but may be `NULL_RTX' if there is not way to determine the return
1907 address of other frames. */
1909 /* ??? This definition fails for leaf functions. There is currently no
1910 general solution for this problem. */
1912 /* ??? There appears to be no way to get the return address of any previous
1913 frame except by disassembling instructions in the prologue/epilogue.
1914 So currently we support only the current frame. */
1916 #define RETURN_ADDR_RTX(COUNT, FRAME) \
1917 ((COUNT) == 0 ? d30v_return_addr() : const0_rtx)
1919 /* Define this if the return address of a particular stack frame is
1920 accessed from the frame pointer of the previous stack frame. */
1921 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1923 /* A C expression whose value is RTL representing the location of the incoming
1924 return address at the beginning of any function, before the prologue. This
1925 RTL is either a `REG', indicating that the return value is saved in `REG',
1926 or a `MEM' representing a location in the stack.
1928 You only need to define this macro if you want to support call frame
1929 debugging information like that provided by DWARF 2. */
1931 /* Before the prologue, RA lives in r62. */
1932 #define INCOMING_RETURN_ADDR_RTX gen_rtx (REG, Pmode, GPR_LINK)
1934 /* A C expression whose value is an integer giving the offset, in bytes, from
1935 the value of the stack pointer register to the top of the stack frame at the
1936 beginning of any function, before the prologue. The top of the frame is
1937 defined to be the value of the stack pointer in the previous frame, just
1938 before the call instruction.
1940 You only need to define this macro if you want to support call frame
1941 debugging information like that provided by DWARF 2. */
1942 #define INCOMING_FRAME_SP_OFFSET 0
1944 /* Initialize data used by insn expanders. This is called from insn_emit,
1945 once for every function before code is generated. */
1947 #define INIT_EXPANDERS d30v_init_expanders ()
1950 /* Stack Checking. */
1952 /* A nonzero value if stack checking is done by the configuration files in a
1953 machine-dependent manner. You should define this macro if stack checking is
1954 require by the ABI of your machine or if you would like to have to stack
1955 checking in some more efficient way than GNU CC's portable approach. The
1956 default value of this macro is zero. */
1957 /* #define STACK_CHECK_BUILTIN */
1959 /* An integer representing the interval at which GNU CC must generate stack
1960 probe instructions. You will normally define this macro to be no larger
1961 than the size of the "guard pages" at the end of a stack area. The default
1962 value of 4096 is suitable for most systems. */
1963 /* #define STACK_CHECK_PROBE_INTERVAL */
1965 /* A integer which is nonzero if GNU CC should perform the stack probe as a
1966 load instruction and zero if GNU CC should use a store instruction. The
1967 default is zero, which is the most efficient choice on most systems. */
1968 /* #define STACK_CHECK_PROBE_LOAD */
1970 /* The number of bytes of stack needed to recover from a stack overflow, for
1971 languages where such a recovery is supported. The default value of 75 words
1972 should be adequate for most machines. */
1973 /* #define STACK_CHECK_PROTECT */
1975 /* The maximum size of a stack frame, in bytes. GNU CC will generate probe
1976 instructions in non-leaf functions to ensure at least this many bytes of
1977 stack are available. If a stack frame is larger than this size, stack
1978 checking will not be reliable and GNU CC will issue a warning. The default
1979 is chosen so that GNU CC only generates one instruction on most systems.
1980 You should normally not change the default value of this macro. */
1981 /* #define STACK_CHECK_MAX_FRAME_SIZE */
1983 /* GNU CC uses this value to generate the above warning message. It represents
1984 the amount of fixed frame used by a function, not including space for any
1985 callee-saved registers, temporaries and user variables. You need only
1986 specify an upper bound for this amount and will normally use the default of
1988 /* #define STACK_CHECK_FIXED_FRAME_SIZE */
1990 /* The maximum size, in bytes, of an object that GNU CC will place in the fixed
1991 area of the stack frame when the user specifies `-fstack-check'. GNU CC
1992 computed the default from the values of the above macros and you will
1993 normally not need to override that default. */
1994 /* #define STACK_CHECK_MAX_VAR_SIZE */
1997 /* Register That Address the Stack Frame. */
1999 /* The register number of the stack pointer register, which must also be a
2000 fixed register according to `FIXED_REGISTERS'. On most machines, the
2001 hardware determines which register this is. */
2002 #define STACK_POINTER_REGNUM GPR_SP
2004 /* The register number of the frame pointer register, which is used to access
2005 automatic variables in the stack frame. On some machines, the hardware
2006 determines which register this is. On other machines, you can choose any
2007 register you wish for this purpose. */
2008 #define FRAME_POINTER_REGNUM GPR_FP
2010 /* On some machines the offset between the frame pointer and starting offset of
2011 the automatic variables is not known until after register allocation has
2012 been done (for example, because the saved registers are between these two
2013 locations). On those machines, define `FRAME_POINTER_REGNUM' the number of
2014 a special, fixed register to be used internally until the offset is known,
2015 and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
2016 used for the frame pointer.
2018 You should define this macro only in the very rare circumstances when it is
2019 not possible to calculate the offset between the frame pointer and the
2020 automatic variables until after register allocation has been completed.
2021 When this macro is defined, you must also indicate in your definition of
2022 `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either
2023 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
2025 Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */
2026 /* #define HARD_FRAME_POINTER_REGNUM */
2028 /* The register number of the arg pointer register, which is used to access the
2029 function's argument list. On some machines, this is the same as the frame
2030 pointer register. On some machines, the hardware determines which register
2031 this is. On other machines, you can choose any register you wish for this
2032 purpose. If this is not the same register as the frame pointer register,
2033 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
2034 arrange to be able to eliminate it (*note Elimination::.). */
2035 /* #define ARG_POINTER_REGNUM */
2037 /* The register number of the return address pointer register, which is used to
2038 access the current function's return address from the stack. On some
2039 machines, the return address is not at a fixed offset from the frame pointer
2040 or stack pointer or argument pointer. This register can be defined to point
2041 to the return address on the stack, and then be converted by
2042 `ELIMINABLE_REGS' into either the frame pointer or stack pointer.
2044 Do not define this macro unless there is no other way to get the return
2045 address from the stack. */
2046 /* #define RETURN_ADDRESS_POINTER_REGNUM */
2048 /* Register numbers used for passing a function's static chain pointer. If
2049 register windows are used, the register number as seen by the called
2050 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
2051 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
2052 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
2054 The static chain register need not be a fixed register.
2056 If the static chain is passed in memory, these macros should not be defined;
2057 instead, the next two macros should be defined. */
2059 #define STATIC_CHAIN_REGNUM (GPR_FIRST + 18)
2060 /* #define STATIC_CHAIN_INCOMING_REGNUM */
2062 /* If the static chain is passed in memory, these macros provide rtx giving
2063 `mem' expressions that denote where they are stored. `STATIC_CHAIN' and
2064 `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called
2065 functions, respectively. Often the former will be at an offset from the
2066 stack pointer and the latter at an offset from the frame pointer.
2068 The variables `stack_pointer_rtx', `frame_pointer_rtx', and
2069 `arg_pointer_rtx' will have been initialized prior to the use of these
2070 macros and should be used to refer to those items.
2072 If the static chain is passed in a register, the two previous
2073 macros should be defined instead. */
2074 /* #define STATIC_CHAIN */
2075 /* #define STATIC_CHAIN_INCOMING */
2078 /* Eliminating the Frame Pointer and the Arg Pointer */
2080 /* A C expression which is nonzero if a function must have and use a frame
2081 pointer. This expression is evaluated in the reload pass. If its value is
2082 nonzero the function will have a frame pointer.
2084 The expression can in principle examine the current function and decide
2085 according to the facts, but on most machines the constant 0 or the constant
2086 1 suffices. Use 0 when the machine allows code to be generated with no
2087 frame pointer, and doing so saves some time or space. Use 1 when there is
2088 no possible advantage to avoiding a frame pointer.
2090 In certain cases, the compiler does not know how to produce valid code
2091 without a frame pointer. The compiler recognizes those cases and
2092 automatically gives the function a frame pointer regardless of what
2093 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
2095 In a function that does not require a frame pointer, the frame pointer
2096 register can be allocated for ordinary usage, unless you mark it as a fixed
2097 register. See `FIXED_REGISTERS' for more information. */
2098 #define FRAME_POINTER_REQUIRED 0
2100 /* A C statement to store in the variable DEPTH-VAR the difference between the
2101 frame pointer and the stack pointer values immediately after the function
2102 prologue. The value would be computed from information such as the result
2103 of `get_frame_size ()' and the tables of registers `regs_ever_live' and
2106 If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not
2107 be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED'
2108 is defined to always be true; in that case, you may set DEPTH-VAR to
2110 /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */
2112 /* If defined, this macro specifies a table of register pairs used to eliminate
2113 unneeded registers that point into the stack frame. If it is not defined,
2114 the only elimination attempted by the compiler is to replace references to
2115 the frame pointer with references to the stack pointer.
2117 The definition of this macro is a list of structure initializations, each of
2118 which specifies an original and replacement register.
2120 On some machines, the position of the argument pointer is not known until
2121 the compilation is completed. In such a case, a separate hard register must
2122 be used for the argument pointer. This register can be eliminated by
2123 replacing it with either the frame pointer or the argument pointer,
2124 depending on whether or not the frame pointer has been eliminated.
2126 In this case, you might specify:
2127 #define ELIMINABLE_REGS \
2128 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2129 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
2130 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
2132 Note that the elimination of the argument pointer with the stack pointer is
2133 specified first since that is the preferred elimination. */
2134 #define ELIMINABLE_REGS \
2136 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
2137 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }, \
2138 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM } \
2141 /* A C expression that returns non-zero if the compiler is allowed to try to
2142 replace register number FROM-REG with register number TO-REG. This macro
2143 need only be defined if `ELIMINABLE_REGS' is defined, and will usually be
2144 the constant 1, since most of the cases preventing register elimination are
2145 things that the compiler already knows about. */
2147 #define CAN_ELIMINATE(FROM, TO) \
2148 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
2149 ? ! frame_pointer_needed \
2152 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
2153 initial difference between the specified pair of registers. This macro must
2154 be defined if `ELIMINABLE_REGS' is defined. */
2156 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
2158 d30v_stack_t *info = d30v_stack_info (); \
2160 if ((FROM) == FRAME_POINTER_REGNUM) \
2162 else if ((FROM) == ARG_POINTER_REGNUM) \
2163 (OFFSET) = info->total_size - current_function_pretend_args_size; \
2168 /* Define this macro if the `longjmp' function restores registers from the
2169 stack frames, rather than from those saved specifically by `setjmp'.
2170 Certain quantities must not be kept in registers across a call to `setjmp'
2171 on such machines. */
2172 /* #define LONGJMP_RESTORE_FROM_STACK */
2175 /* Passing Function Arguments on the Stack */
2177 /* Define this macro if an argument declared in a prototype as an integral type
2178 smaller than `int' should actually be passed as an `int'. In addition to
2179 avoiding errors in certain cases of mismatch, it also makes for better code
2180 on certain machines. */
2181 /* #define PROMOTE_PROTOTYPES */
2183 /* A C expression that is the number of bytes actually pushed onto the stack
2184 when an instruction attempts to push NPUSHED bytes.
2186 If the target machine does not have a push instruction, do not define this
2187 macro. That directs GNU CC to use an alternate strategy: to allocate the
2188 entire argument block and then store the arguments into it.
2190 On some machines, the definition
2192 #define PUSH_ROUNDING(BYTES) (BYTES)
2194 will suffice. But on other machines, instructions that appear to push one
2195 byte actually push two bytes in an attempt to maintain alignment. Then the
2196 definition should be
2198 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
2199 /* #define PUSH_ROUNDING(NPUSHED) */
2201 /* If defined, the maximum amount of space required for outgoing arguments will
2202 be computed and placed into the variable
2203 `current_function_outgoing_args_size'. No space will be pushed onto the
2204 stack for each call; instead, the function prologue should increase the
2205 stack frame size by this amount.
2207 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
2209 #define ACCUMULATE_OUTGOING_ARGS 1
2211 /* Define this macro if functions should assume that stack space has been
2212 allocated for arguments even when their values are passed in registers.
2214 The value of this macro is the size, in bytes, of the area reserved for
2215 arguments passed in registers for the function represented by FNDECL.
2217 This space can be allocated by the caller, or be a part of the
2218 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
2220 /* #define REG_PARM_STACK_SPACE(FNDECL) */
2222 /* Define these macros in addition to the one above if functions might allocate
2223 stack space for arguments even when their values are passed in registers.
2224 These should be used when the stack space allocated for arguments in
2225 registers is not a simple constant independent of the function declaration.
2227 The value of the first macro is the size, in bytes, of the area that we
2228 should initially assume would be reserved for arguments passed in registers.
2230 The value of the second macro is the actual size, in bytes, of the area that
2231 will be reserved for arguments passed in registers. This takes two
2232 arguments: an integer representing the number of bytes of fixed sized
2233 arguments on the stack, and a tree representing the number of bytes of
2234 variable sized arguments on the stack.
2236 When these macros are defined, `REG_PARM_STACK_SPACE' will only be called
2237 for libcall functions, the current function, or for a function being called
2238 when it is known that such stack space must be allocated. In each case this
2239 value can be easily computed.
2241 When deciding whether a called function needs such stack space, and how much
2242 space to reserve, GNU CC uses these two macros instead of
2243 `REG_PARM_STACK_SPACE'. */
2244 /* #define MAYBE_REG_PARM_STACK_SPACE */
2245 /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */
2247 /* Define this if it is the responsibility of the caller to allocate the area
2248 reserved for arguments passed in registers.
2250 If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the
2251 space for these arguments counts in the value of
2252 `current_function_outgoing_args_size'. */
2253 /* #define OUTGOING_REG_PARM_STACK_SPACE */
2255 /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack
2256 parameters don't skip the area specified by it.
2258 Normally, when a parameter is not passed in registers, it is placed on the
2259 stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro
2260 suppresses this behavior and causes the parameter to be passed on the stack
2261 in its natural location. */
2262 /* #define STACK_PARMS_IN_REG_PARM_AREA */
2264 /* A C expression that should indicate the number of bytes of its own arguments
2265 that a function pops on returning, or 0 if the function pops no arguments
2266 and the caller must therefore pop them all after the function returns.
2268 FUNDECL is a C variable whose value is a tree node that describes the
2269 function in question. Normally it is a node of type `FUNCTION_DECL' that
2270 describes the declaration of the function. From this it is possible to
2271 obtain the DECL_ATTRIBUTES of the function.
2273 FUNTYPE is a C variable whose value is a tree node that describes the
2274 function in question. Normally it is a node of type `FUNCTION_TYPE' that
2275 describes the data type of the function. From this it is possible to obtain
2276 the data types of the value and arguments (if known).
2278 When a call to a library function is being considered, FUNTYPE will contain
2279 an identifier node for the library function. Thus, if you need to
2280 distinguish among various library functions, you can do so by their names.
2281 Note that "library function" in this context means a function used to
2282 perform arithmetic, whose name is known specially in the compiler and was
2283 not mentioned in the C code being compiled.
2285 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
2286 variable number of bytes is passed, it is zero, and argument popping will
2287 always be the responsibility of the calling function.
2289 On the VAX, all functions always pop their arguments, so the definition of
2290 this macro is STACK-SIZE. On the 68000, using the standard calling
2291 convention, no functions pop their arguments, so the value of the macro is
2292 always 0 in this case. But an alternative calling convention is available
2293 in which functions that take a fixed number of arguments pop them but other
2294 functions (such as `printf') pop nothing (the caller pops all). When this
2295 convention is in use, FUNTYPE is examined to determine whether a function
2296 takes a fixed number of arguments. */
2297 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
2300 /* Function Arguments in Registers */
2302 /* A C expression that controls whether a function argument is passed in a
2303 register, and which register.
2305 The arguments are CUM, which summarizes all the previous arguments; MODE,
2306 the machine mode of the argument; TYPE, the data type of the argument as a
2307 tree node or 0 if that is not known (which happens for C support library
2308 functions); and NAMED, which is 1 for an ordinary argument and 0 for
2309 nameless arguments that correspond to `...' in the called function's
2312 The value of the expression should either be a `reg' RTX for the hard
2313 register in which to pass the argument, or zero to pass the argument on the
2316 For machines like the VAX and 68000, where normally all arguments are
2317 pushed, zero suffices as a definition.
2319 The usual way to make the ANSI library `stdarg.h' work on a machine where
2320 some arguments are usually passed in registers, is to cause nameless
2321 arguments to be passed on the stack instead. This is done by making
2322 `FUNCTION_ARG' return 0 whenever NAMED is 0.
2324 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
2325 this macro to determine if this argument is of a type that must be passed in
2326 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
2327 returns non-zero for such an argument, the compiler will abort. If
2328 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
2329 stack and then loaded into a register. */
2331 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
2332 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, FALSE)
2334 /* Define this macro if the target machine has "register windows", so that the
2335 register in which a function sees an arguments is not necessarily the same
2336 as the one in which the caller passed the argument.
2338 For such machines, `FUNCTION_ARG' computes the register in which the caller
2339 passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar
2340 fashion to tell the function being called where the arguments will arrive.
2342 If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both
2345 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
2346 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, TRUE)
2348 /* A C expression for the number of words, at the beginning of an argument,
2349 must be put in registers. The value must be zero for arguments that are
2350 passed entirely in registers or that are entirely pushed on the stack.
2352 On some machines, certain arguments must be passed partially in registers
2353 and partially in memory. On these machines, typically the first N words of
2354 arguments are passed in registers, and the rest on the stack. If a
2355 multi-word argument (a `double' or a structure) crosses that boundary, its
2356 first few words must be passed in registers and the rest must be pushed.
2357 This macro tells the compiler when this occurs, and how many of the words
2358 should go in registers.
2360 `FUNCTION_ARG' for these arguments should return the first register to be
2361 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
2362 the called function. */
2363 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
2364 d30v_function_arg_partial_nregs (&CUM, (int)MODE, TYPE, NAMED)
2366 /* A C expression that indicates when an argument must be passed by reference.
2367 If nonzero for an argument, a copy of that argument is made in memory and a
2368 pointer to the argument is passed instead of the argument itself. The
2369 pointer is passed in whatever way is appropriate for passing a pointer to
2372 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
2373 definition of this macro might be
2374 #define FUNCTION_ARG_PASS_BY_REFERENCE\
2375 (CUM, MODE, TYPE, NAMED) \
2376 MUST_PASS_IN_STACK (MODE, TYPE) */
2377 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0
2379 /* If defined, a C expression that indicates when it is the called function's
2380 responsibility to make a copy of arguments passed by invisible reference.
2381 Normally, the caller makes a copy and passes the address of the copy to the
2382 routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is
2383 nonzero, the caller does not make a copy. Instead, it passes a pointer to
2384 the "live" value. The called function must not modify this value. If it
2385 can be determined that the value won't be modified, it need not make a copy;
2386 otherwise a copy must be made. */
2387 /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */
2389 /* A C type for declaring a variable that is used as the first argument of
2390 `FUNCTION_ARG' and other related values. For some target machines, the type
2391 `int' suffices and can hold the number of bytes of argument so far.
2393 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
2394 that have been passed on the stack. The compiler has other variables to
2395 keep track of that. For target machines on which all arguments are passed
2396 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
2397 however, the data structure must exist and should not be empty, so use
2399 typedef int CUMULATIVE_ARGS;
2401 /* A C statement (sans semicolon) for initializing the variable CUM for the
2402 state at the beginning of the argument list. The variable has type
2403 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
2404 of the function which will receive the args, or 0 if the args are to a
2405 compiler support library function. The value of INDIRECT is nonzero when
2406 processing an indirect call, for example a call through a function pointer.
2407 The value of INDIRECT is zero for a call to an explicitly named function, a
2408 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
2409 arguments for the function being compiled.
2411 When processing a call to a compiler support library function, LIBNAME
2412 identifies which one. It is a `symbol_ref' rtx which contains the name of
2413 the function, as a string. LIBNAME is 0 when an ordinary C function call is
2414 being processed. Thus, each time this macro is called, either LIBNAME or
2415 FNTYPE is nonzero, but never both of them at once. */
2417 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
2418 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, INDIRECT, FALSE)
2420 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
2421 arguments for the function being compiled. If this macro is undefined,
2422 `INIT_CUMULATIVE_ARGS' is used instead.
2424 The value passed for LIBNAME is always 0, since library routines with
2425 special calling conventions are never compiled with GNU CC. The argument
2426 LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */
2428 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
2429 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, FALSE, TRUE)
2431 /* A C statement (sans semicolon) to update the summarizer variable CUM to
2432 advance past an argument in the argument list. The values MODE, TYPE and
2433 NAMED describe that argument. Once this is done, the variable CUM is
2434 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
2436 This macro need not do anything if the argument in question was passed on
2437 the stack. The compiler knows how to track the amount of stack space used
2438 for arguments without any special help. */
2440 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
2441 d30v_function_arg_advance (&CUM, (int) MODE, TYPE, NAMED)
2443 /* If defined, a C expression which determines whether, and in which direction,
2444 to pad out an argument with extra space. The value should be of type `enum
2445 direction': either `upward' to pad above the argument, `downward' to pad
2446 below, or `none' to inhibit padding.
2448 The *amount* of padding is always just enough to reach the next multiple of
2449 `FUNCTION_ARG_BOUNDARY'; this macro does not control it.
2451 This macro has a default definition which is right for most systems. For
2452 little-endian machines, the default is to pad upward. For big-endian
2453 machines, the default is to pad downward for an argument of constant size
2454 shorter than an `int', and upward otherwise. */
2455 /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */
2457 /* If defined, a C expression that gives the alignment boundary, in bits, of an
2458 argument with the specified mode and type. If it is not defined,
2459 `PARM_BOUNDARY' is used for all arguments. */
2461 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
2462 d30v_function_arg_boundary ((int) MODE, TYPE)
2464 /* A C expression that is nonzero if REGNO is the number of a hard register in
2465 which function arguments are sometimes passed. This does *not* include
2466 implicit arguments such as the static chain and the structure-value address.
2467 On many machines, no registers can be used for this purpose since all
2468 function arguments are pushed on the stack. */
2470 #define FUNCTION_ARG_REGNO_P(REGNO) \
2471 IN_RANGE_P (REGNO, GPR_ARG_FIRST, GPR_ARG_LAST)
2474 /* How Scalar Function Values are Returned */
2476 /* Define this macro if `-traditional' should not cause functions declared to
2477 return `float' to convert the value to `double'. */ /* #define
2478 TRADITIONAL_RETURN_FLOAT */
2480 /* A C expression to create an RTX representing the place where a function
2481 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
2482 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
2483 represent that type. On many machines, only the mode is relevant.
2484 (Actually, on most machines, scalar values are returned in the same place
2485 regardless of mode).
2487 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
2488 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
2490 If the precise function being called is known, FUNC is a tree node
2491 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
2492 possible to use a different value-returning convention for specific
2493 functions when all their calls are known.
2495 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
2496 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
2497 related macros, below. */
2499 #define FUNCTION_VALUE(VALTYPE, FUNC) \
2500 gen_rtx (REG, TYPE_MODE (VALTYPE), GPR_RET_VALUE)
2502 /* Define this macro if the target machine has "register windows" so that the
2503 register in which a function returns its value is not the same as the one in
2504 which the caller sees the value.
2506 For such machines, `FUNCTION_VALUE' computes the register in which the
2507 caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a
2508 similar fashion to tell the function where to put the value.
2510 If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both
2513 `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data
2514 types, because these are returned in another way. See `STRUCT_VALUE_REGNUM'
2515 and related macros, below. */
2516 /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */
2518 /* A C expression to create an RTX representing the place where a library
2519 function returns a value of mode MODE. If the precise function being called
2520 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a
2521 null pointer. This makes it possible to use a different value-returning
2522 convention for specific functions when all their calls are known.
2524 Note that "library function" in this context means a compiler support
2525 routine, used to perform arithmetic, whose name is known specially by the
2526 compiler and was not mentioned in the C code being compiled.
2528 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
2529 types, because none of the library functions returns such types. */
2531 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, GPR_RET_VALUE)
2533 /* A C expression that is nonzero if REGNO is the number of a hard register in
2534 which the values of called function may come back.
2536 A register whose use for returning values is limited to serving as the
2537 second of a pair (for a value of type `double', say) need not be recognized
2538 by this macro. So for most machines, this definition suffices:
2540 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
2542 If the machine has register windows, so that the caller and the called
2543 function use different registers for the return value, this macro should
2544 recognize only the caller's register numbers. */
2546 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == GPR_RET_VALUE)
2548 /* Define this macro if `untyped_call' and `untyped_return' need more space
2549 than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an
2550 arbitrary return value. */
2551 /* #define APPLY_RESULT_SIZE */
2554 /* How Large Values are Returned */
2556 /* A C expression which can inhibit the returning of certain function values in
2557 registers, based on the type of value. A nonzero value says to return the
2558 function value in memory, just as large structures are always returned.
2559 Here TYPE will be a C expression of type `tree', representing the data type
2562 Note that values of mode `BLKmode' must be explicitly handled by this macro.
2563 Also, the option `-fpcc-struct-return' takes effect regardless of this
2564 macro. On most systems, it is possible to leave the macro undefined; this
2565 causes a default definition to be used, whose value is the constant 1 for
2566 `BLKmode' values, and 0 otherwise.
2568 Do not use this macro to indicate that structures and unions should always
2569 be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN'
2570 to indicate this. */
2571 /* #define RETURN_IN_MEMORY(TYPE) */
2573 /* Define this macro to be 1 if all structure and union return values must be
2574 in memory. Since this results in slower code, this should be defined only
2575 if needed for compatibility with other compilers or with an ABI. If you
2576 define this macro to be 0, then the conventions used for structure and union
2577 return values are decided by the `RETURN_IN_MEMORY' macro.
2579 If not defined, this defaults to the value 1. */
2580 /* #define DEFAULT_PCC_STRUCT_RETURN */
2582 /* If the structure value address is passed in a register, then
2583 `STRUCT_VALUE_REGNUM' should be the number of that register. */
2585 #define STRUCT_VALUE_REGNUM GPR_ARG_FIRST
2587 /* If the structure value address is not passed in a register, define
2588 `STRUCT_VALUE' as an expression returning an RTX for the place where the
2589 address is passed. If it returns 0, the address is passed as an "invisible"
2592 #define STRUCT_VALUE 0
2594 /* On some architectures the place where the structure value address is found
2595 by the called function is not the same place that the caller put it. This
2596 can be due to register windows, or it could be because the function prologue
2597 moves it to a different place.
2599 If the incoming location of the structure value address is in a register,
2600 define this macro as the register number. */
2601 /* #define STRUCT_VALUE_INCOMING_REGNUM */
2603 /* If the incoming location is not a register, then you should define
2604 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called
2605 function should find the value. If it should find the value on the stack,
2606 define this to create a `mem' which refers to the frame pointer. A
2607 definition of 0 means that the address is passed as an "invisible" first
2609 /* #define STRUCT_VALUE_INCOMING */
2611 /* Define this macro if the usual system convention on the target machine for
2612 returning structures and unions is for the called function to return the
2613 address of a static variable containing the value.
2615 Do not define this if the usual system convention is for the caller to pass
2616 an address to the subroutine.
2618 This macro has effect in `-fpcc-struct-return' mode, but it does nothing
2619 when you use `-freg-struct-return' mode. */
2620 /* #define PCC_STATIC_STRUCT_RETURN */
2623 /* Caller-Saves Register Allocation */
2625 /* Define this macro if function calls on the target machine do not preserve
2626 any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all
2627 registers. This macro enables `-fcaller-saves' by default. Eventually that
2628 option will be enabled by default on all machines and both the option and
2629 this macro will be eliminated. */
2630 /* #define DEFAULT_CALLER_SAVES */
2632 /* A C expression to determine whether it is worthwhile to consider placing a
2633 pseudo-register in a call-clobbered hard register and saving and restoring
2634 it around each function call. The expression should be 1 when this is worth
2635 doing, and 0 otherwise.
2637 If you don't define this macro, a default is used which is good on most
2638 machines: `4 * CALLS < REFS'. */
2639 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
2642 /* #define EXIT_IGNORE_STACK */
2644 /* Define this macro as a C expression that is nonzero for registers
2645 are used by the epilogue or the `return' pattern. The stack and
2646 frame pointer registers are already be assumed to be used as
2648 #define EPILOGUE_USES(REGNO) ((REGNO) == GPR_LINK)
2650 /* Define this macro if the function epilogue contains delay slots to which
2651 instructions from the rest of the function can be "moved". The definition
2652 should be a C expression whose value is an integer representing the number
2653 of delay slots there. */
2654 /* #define DELAY_SLOTS_FOR_EPILOGUE */
2656 /* A C expression that returns 1 if INSN can be placed in delay slot number N
2659 The argument N is an integer which identifies the delay slot now being
2660 considered (since different slots may have different rules of eligibility).
2661 It is never negative and is always less than the number of epilogue delay
2662 slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular
2663 insn for a given delay slot, in principle, it may be reconsidered for a
2664 subsequent delay slot. Also, other insns may (at least in principle) be
2665 considered for the so far unfilled delay slot.
2667 The insns accepted to fill the epilogue delay slots are put in an
2668 RTL list made with `insn_list' objects, stored in the variable
2669 `current_function_epilogue_delay_list'. The insn for the first
2670 delay slot comes first in the list. Your definition of the function
2671 output_function_epilogue() should fill the delay slots by outputting the
2672 insns in this list, usually by calling `final_scan_insn'.
2674 You need not define this macro if you did not define
2675 `DELAY_SLOTS_FOR_EPILOGUE'. */
2676 /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */
2678 /* A C compound statement that outputs the assembler code for a thunk function,
2679 used to implement C++ virtual function calls with multiple inheritance. The
2680 thunk acts as a wrapper around a virtual function, adjusting the implicit
2681 object parameter before handing control off to the real function.
2683 First, emit code to add the integer DELTA to the location that contains the
2684 incoming first argument. Assume that this argument contains a pointer, and
2685 is the one used to pass the `this' pointer in C++. This is the incoming
2686 argument *before* the function prologue, e.g. `%o0' on a sparc. The
2687 addition must preserve the values of all other incoming arguments.
2689 After the addition, emit code to jump to FUNCTION, which is a
2690 `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch
2691 the return address. Hence returning from FUNCTION will return to whoever
2692 called the current `thunk'.
2694 The effect must be as if FUNCTION had been called directly with the
2695 adjusted first argument. This macro is responsible for emitting
2696 all of the code for a thunk function; output_function_prologue()
2697 and output_function_epilogue() are not invoked.
2699 The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been
2700 extracted from it.) It might possibly be useful on some targets, but
2703 If you do not define this macro, the target-independent code in the C++
2704 frontend will generate a less efficient heavyweight thunk that calls
2705 FUNCTION instead of jumping to it. The generic approach does not support
2707 /* #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) */
2709 /* A C structure for machine-specific, per-function data.
2710 This is added to the cfun structure. */
2711 typedef struct machine_function
2713 /* Additionsl stack adjustment in __builtin_eh_throw. */
2714 struct rtx_def * eh_epilogue_sp_ofs;
2718 /* Generating Code for Profiling. */
2720 /* A C statement or compound statement to output to FILE some assembler code to
2721 call the profiling subroutine `mcount'. Before calling, the assembler code
2722 must load the address of a counter variable into a register where `mcount'
2723 expects to find the address. The name of this variable is `LP' followed by
2724 the number LABELNO, so you would generate the name using `LP%d' in a
2727 The details of how the address should be passed to `mcount' are determined
2728 by your operating system environment, not by GNU CC. To figure them out,
2729 compile a small program for profiling using the system's installed C
2730 compiler and look at the assembler code that results. */
2732 #define FUNCTION_PROFILER(FILE, LABELNO) d30v_function_profiler (FILE, LABELNO)
2734 /* Define this macro if the code for function profiling should come before the
2735 function prologue. Normally, the profiling code comes after. */
2736 /* #define PROFILE_BEFORE_PROLOGUE */
2738 /* A C statement or compound statement to output to FILE some assembler code to
2739 initialize basic-block profiling for the current object module. The global
2740 compile flag `profile_block_flag' distingishes two profile modes.
2742 profile_block_flag != 2'
2743 Output code to call the subroutine `__bb_init_func' once per
2744 object module, passing it as its sole argument the address of
2745 a block allocated in the object module.
2747 The name of the block is a local symbol made with this
2750 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2752 Of course, since you are writing the definition of
2753 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2754 you can take a short cut in the definition of this macro and
2755 use the name that you know will result.
2757 The first word of this block is a flag which will be nonzero
2758 if the object module has already been initialized. So test
2759 this word first, and do not call `__bb_init_func' if the flag
2760 is nonzero. BLOCK_OR_LABEL contains a unique number which
2761 may be used to generate a label as a branch destination when
2762 `__bb_init_func' will not be called.
2764 Described in assembler language, the code to be output looks
2773 profile_block_flag == 2'
2774 Output code to call the subroutine `__bb_init_trace_func' and
2775 pass two parameters to it. The first parameter is the same as
2776 for `__bb_init_func'. The second parameter is the number of
2777 the first basic block of the function as given by
2778 BLOCK_OR_LABEL. Note that `__bb_init_trace_func' has to be
2779 called, even if the object module has been initialized
2782 Described in assembler language, the code to be output looks
2785 parameter2 <- BLOCK_OR_LABEL
2786 call __bb_init_trace_func */
2787 /* #define FUNCTION_BLOCK_PROFILER (FILE, LABELNO) */
2789 /* A C statement or compound statement to output to FILE some assembler code to
2790 increment the count associated with the basic block number BLOCKNO. The
2791 global compile flag `profile_block_flag' distingishes two profile modes.
2793 profile_block_flag != 2'
2794 Output code to increment the counter directly. Basic blocks
2795 are numbered separately from zero within each compilation.
2796 The count associated with block number BLOCKNO is at index
2797 BLOCKNO in a vector of words; the name of this array is a
2798 local symbol made with this statement:
2800 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 2);
2802 Of course, since you are writing the definition of
2803 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2804 you can take a short cut in the definition of this macro and
2805 use the name that you know will result.
2807 Described in assembler language, the code to be output looks
2810 inc (LPBX2+4*BLOCKNO)
2812 profile_block_flag == 2'
2813 Output code to initialize the global structure `__bb' and
2814 call the function `__bb_trace_func', which will increment the
2817 `__bb' consists of two words. In the first word, the current
2818 basic block number, as given by BLOCKNO, has to be stored. In
2819 the second word, the address of a block allocated in the
2820 object module has to be stored. The address is given by the
2821 label created with this statement:
2823 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2825 Described in assembler language, the code to be output looks
2827 move BLOCKNO -> (__bb)
2828 move LPBX0 -> (__bb+4)
2829 call __bb_trace_func */
2830 /* #define BLOCK_PROFILER(FILE, BLOCKNO) */
2832 /* A C statement or compound statement to output to FILE assembler
2833 code to call function `__bb_trace_ret'. The assembler code should
2834 only be output if the global compile flag `profile_block_flag' ==
2835 2. This macro has to be used at every place where code for
2836 returning from a function is generated (e.g. output_function_epilogue()).
2837 Although you have to write the definition of output_function_epilogue()
2838 as well, you have to define this macro to tell the compiler, that
2839 the proper call to `__bb_trace_ret' is produced. */
2840 /* #define FUNCTION_BLOCK_PROFILER_EXIT(FILE) */
2842 /* A C statement or compound statement to save all registers, which may be
2843 clobbered by a function call, including condition codes. The `asm'
2844 statement will be mostly likely needed to handle this task. Local labels in
2845 the assembler code can be concatenated with the string ID, to obtain a
2848 Registers or condition codes clobbered by output_function_prologue()
2849 or output_function_epilogue() must be saved in the macros
2850 `FUNCTION_BLOCK_PROFILER', FUNCTION_BLOCK_PROFILER_EXIT' and
2851 `BLOCK_PROFILER' prior calling `__bb_init_trace_func', `__bb_trace_ret'
2852 and `__bb_trace_func' respectively. */
2853 /* #define MACHINE_STATE_SAVE(ID) */
2855 /* A C statement or compound statement to restore all registers, including
2856 condition codes, saved by `MACHINE_STATE_SAVE'.
2858 Registers or condition codes clobbered by output_function_prologue()
2859 or output_function_epilogue() must be restored in the macros
2860 `FUNCTION_BLOCK_PROFILER', `FUNCTION_BLOCK_PROFILER_EXIT' and
2861 `BLOCK_PROFILER' after calling `__bb_init_trace_func', `__bb_trace_ret' and
2862 `__bb_trace_func' respectively. */
2863 /* #define MACHINE_STATE_RESTORE(ID) */
2865 /* A C function or functions which are needed in the library to support block
2867 /* #define BLOCK_PROFILER_CODE */
2870 /* Implementing the Varargs Macros. */
2872 /* If defined, is a C expression that produces the machine-specific code for a
2873 call to `__builtin_saveregs'. This code will be moved to the very beginning
2874 of the function, before any parameter access are made. The return value of
2875 this function should be an RTX that contains the value to use as the return
2876 of `__builtin_saveregs'.
2878 If this macro is not defined, the compiler will output an ordinary call to
2879 the library function `__builtin_saveregs'. */
2881 #define EXPAND_BUILTIN_SAVEREGS() d30v_expand_builtin_saveregs ()
2883 /* This macro offers an alternative to using `__builtin_saveregs' and defining
2884 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
2885 arguments into the stack so that all the arguments appear to have been
2886 passed consecutively on the stack. Once this is done, you can use the
2887 standard implementation of varargs that works for machines that pass all
2888 their arguments on the stack.
2890 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
2891 the values that obtain after processing of the named arguments. The
2892 arguments MODE and TYPE describe the last named argument--its machine mode
2893 and its data type as a tree node.
2895 The macro implementation should do two things: first, push onto the stack
2896 all the argument registers *not* used for the named arguments, and second,
2897 store the size of the data thus pushed into the `int'-valued variable whose
2898 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
2899 store here will serve as additional offset for setting up the stack frame.
2901 Because you must generate code to push the anonymous arguments at compile
2902 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
2903 useful on machines that have just a single category of argument register and
2904 use it uniformly for all data types.
2906 If the argument SECOND_TIME is nonzero, it means that the arguments of the
2907 function are being analyzed for the second time. This happens for an inline
2908 function, which is not actually compiled until the end of the source file.
2909 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
2912 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
2913 d30v_setup_incoming_varargs (&ARGS_SO_FAR, (int) MODE, TYPE, \
2914 &PRETEND_ARGS_SIZE, SECOND_TIME)
2916 /* Define this macro if the location where a function argument is passed
2917 depends on whether or not it is a named argument.
2919 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
2920 varargs and stdarg functions. With this macro defined, the NAMED argument
2921 is always true for named arguments, and false for unnamed arguments. If
2922 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
2923 arguments are treated as named. Otherwise, all named arguments except the
2924 last are treated as named. */
2925 /* #define STRICT_ARGUMENT_NAMING */
2927 /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not
2928 defined, it is assumed that va_list is a void * pointer. */
2930 #define BUILD_VA_LIST_TYPE(VALIST) \
2931 (VALIST) = d30v_build_va_list ()
2934 /* Implement the stdarg/varargs va_start macro. STDARG_P is non-zero if this
2935 is stdarg.h instead of varargs.h. VALIST is the tree of the va_list
2936 variable to initialize. NEXTARG is the machine independent notion of the
2937 'next' argument after the variable arguments. If not defined, a standard
2938 implementation will be defined that works for arguments passed on the stack. */
2940 #define EXPAND_BUILTIN_VA_START(STDARG_P, VALIST, NEXTARG) \
2941 (d30v_expand_builtin_va_start(STDARG_P, VALIST, NEXTARG))
2943 /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type
2944 va_list as a tree, TYPE is the type passed to va_arg. */
2946 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
2947 (d30v_expand_builtin_va_arg (VALIST, TYPE))
2949 /* Implement the stdarg/varargs va_end macro.
2950 VALIST is the variable of type va_list as a tree. */
2952 /* #define EXPAND_BUILTIN_VA_END(VALIST) */
2956 /* Trampolines for Nested Functions. */
2958 /* A C statement to output, on the stream FILE, assembler code for a block of
2959 data that contains the constant parts of a trampoline. This code should not
2960 include a label--the label is taken care of automatically. */
2961 /* #define TRAMPOLINE_TEMPLATE(FILE) d30v_trampoline_template (FILE) */
2963 /* The name of a subroutine to switch to the section in which the trampoline
2964 template is to be placed (*note Sections::.). The default is a value of
2965 `readonly_data_section', which places the trampoline in the section
2966 containing read-only data. */
2967 /* #define TRAMPOLINE_SECTION */
2969 /* A C expression for the size in bytes of the trampoline, as an integer. */
2970 #define TRAMPOLINE_SIZE (d30v_trampoline_size ())
2972 /* Alignment required for trampolines, in bits.
2974 If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for
2975 aligning trampolines. */
2976 #define TRAMPOLINE_ALIGNMENT 64
2978 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
2979 RTX for the address of the trampoline; FNADDR is an RTX for the address of
2980 the nested function; STATIC_CHAIN is an RTX for the static chain value that
2981 should be passed to the function when it is called. */
2982 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
2983 d30v_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
2985 /* A C expression to allocate run-time space for a trampoline. The expression
2986 value should be an RTX representing a memory reference to the space for the
2989 If this macro is not defined, by default the trampoline is allocated as a
2990 stack slot. This default is right for most machines. The exceptions are
2991 machines where it is impossible to execute instructions in the stack area.
2992 On such machines, you may have to implement a separate stack, using this
2993 macro in conjunction with output_function_prologue () and
2994 output_function_epilogue ().
2996 FP points to a data structure, a `struct function', which describes the
2997 compilation status of the immediate containing function of the function
2998 which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not
2999 defined), the stack slot for the trampoline is in the stack frame of this
3000 containing function. Other allocation strategies probably must do something
3001 analogous with this information. */
3002 /* #define ALLOCATE_TRAMPOLINE(FP) */
3004 /* Implementing trampolines is difficult on many machines because they have
3005 separate instruction and data caches. Writing into a stack location fails
3006 to clear the memory in the instruction cache, so when the program jumps to
3007 that location, it executes the old contents.
3009 Here are two possible solutions. One is to clear the relevant parts of the
3010 instruction cache whenever a trampoline is set up. The other is to make all
3011 trampolines identical, by having them jump to a standard subroutine. The
3012 former technique makes trampoline execution faster; the latter makes
3013 initialization faster.
3015 To clear the instruction cache when a trampoline is initialized, define the
3016 following macros which describe the shape of the cache. */
3018 /* The total size in bytes of the cache. */
3019 /* #define INSN_CACHE_SIZE */
3021 /* The length in bytes of each cache line. The cache is divided into cache
3022 lines which are disjoint slots, each holding a contiguous chunk of data
3023 fetched from memory. Each time data is brought into the cache, an entire
3024 line is read at once. The data loaded into a cache line is always aligned
3025 on a boundary equal to the line size. */
3026 /* #define INSN_CACHE_LINE_WIDTH */
3028 /* The number of alternative cache lines that can hold any particular memory
3030 /* #define INSN_CACHE_DEPTH */
3032 /* Alternatively, if the machine has system calls or instructions to clear the
3033 instruction cache directly, you can define the following macro. */
3035 /* If defined, expands to a C expression clearing the *instruction cache* in
3036 the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE
3037 is defined, some generic code is generated to clear the cache. The
3038 definition of this macro would typically be a series of `asm' statements.
3039 Both BEG and END are both pointer expressions. */
3040 /* #define CLEAR_INSN_CACHE (BEG, END) */
3042 /* To use a standard subroutine, define the following macro. In addition, you
3043 must make sure that the instructions in a trampoline fill an entire cache
3044 line with identical instructions, or else ensure that the beginning of the
3045 trampoline code is always aligned at the same point in its cache line. Look
3046 in `m68k.h' as a guide. */
3048 /* Define this macro if trampolines need a special subroutine to do their work.
3049 The macro should expand to a series of `asm' statements which will be
3050 compiled with GNU CC. They go in a library function named
3051 `__transfer_from_trampoline'.
3053 If you need to avoid executing the ordinary prologue code of a compiled C
3054 function when you jump to the subroutine, you can do so by placing a special
3055 label of your own in the assembler code. Use one `asm' statement to
3056 generate an assembler label, and another to make the label global. Then
3057 trampolines can use that label to jump directly to your special assembler
3059 /* #define TRANSFER_FROM_TRAMPOLINE */
3062 /* Implicit Calls to Library Routines */
3064 /* A C string constant giving the name of the function to call for
3065 multiplication of one signed full-word by another. If you do not define
3066 this macro, the default name is used, which is `__mulsi3', a function
3067 defined in `libgcc.a'. */
3068 /* #define MULSI3_LIBCALL */
3070 /* A C string constant giving the name of the function to call for division of
3071 one signed full-word by another. If you do not define this macro, the
3072 default name is used, which is `__divsi3', a function defined in `libgcc.a'. */
3073 /* #define DIVSI3_LIBCALL */
3075 /* A C string constant giving the name of the function to call for division of
3076 one unsigned full-word by another. If you do not define this macro, the
3077 default name is used, which is `__udivsi3', a function defined in
3079 /* #define UDIVSI3_LIBCALL */
3081 /* A C string constant giving the name of the function to call for the
3082 remainder in division of one signed full-word by another. If you do not
3083 define this macro, the default name is used, which is `__modsi3', a function
3084 defined in `libgcc.a'. */
3085 /* #define MODSI3_LIBCALL */
3087 /* A C string constant giving the name of the function to call for the
3088 remainder in division of one unsigned full-word by another. If you do not
3089 define this macro, the default name is used, which is `__umodsi3', a
3090 function defined in `libgcc.a'. */
3091 /* #define UMODSI3_LIBCALL */
3093 /* A C string constant giving the name of the function to call for
3094 multiplication of one signed double-word by another. If you do not define
3095 this macro, the default name is used, which is `__muldi3', a function
3096 defined in `libgcc.a'. */
3097 /* #define MULDI3_LIBCALL */
3099 /* A C string constant giving the name of the function to call for division of
3100 one signed double-word by another. If you do not define this macro, the
3101 default name is used, which is `__divdi3', a function defined in `libgcc.a'. */
3102 /* #define DIVDI3_LIBCALL */
3104 /* A C string constant giving the name of the function to call for division of
3105 one unsigned full-word by another. If you do not define this macro, the
3106 default name is used, which is `__udivdi3', a function defined in
3108 /* #define UDIVDI3_LIBCALL */
3110 /* A C string constant giving the name of the function to call for the
3111 remainder in division of one signed double-word by another. If you do not
3112 define this macro, the default name is used, which is `__moddi3', a function
3113 defined in `libgcc.a'. */
3114 /* #define MODDI3_LIBCALL */
3116 /* A C string constant giving the name of the function to call for the
3117 remainder in division of one unsigned full-word by another. If you do not
3118 define this macro, the default name is used, which is `__umoddi3', a
3119 function defined in `libgcc.a'. */
3120 /* #define UMODDI3_LIBCALL */
3122 /* Define this macro as a C statement that declares additional library routines
3123 renames existing ones. `init_optabs' calls this macro after initializing all
3124 the normal library routines. */
3125 /* #define INIT_TARGET_OPTABS */
3127 /* The value of `EDOM' on the target machine, as a C integer constant
3128 expression. If you don't define this macro, GNU CC does not attempt to
3129 deposit the value of `EDOM' into `errno' directly. Look in
3130 `/usr/include/errno.h' to find the value of `EDOM' on your system.
3132 If you do not define `TARGET_EDOM', then compiled code reports domain errors
3133 by calling the library function and letting it report the error. If
3134 mathematical functions on your system use `matherr' when there is an error,
3135 then you should leave `TARGET_EDOM' undefined so that `matherr' is used
3137 /* #define TARGET_EDOM */
3139 /* Define this macro as a C expression to create an rtl expression that refers
3140 to the global "variable" `errno'. (On certain systems, `errno' may not
3141 actually be a variable.) If you don't define this macro, a reasonable
3143 /* #define GEN_ERRNO_RTX */
3145 /* Define this macro if GNU CC should generate calls to the System V (and ANSI
3146 C) library functions `memcpy' and `memset' rather than the BSD functions
3147 `bcopy' and `bzero'.
3149 Defined in svr4.h. */
3150 /* #define TARGET_MEM_FUNCTIONS */
3152 /* Define this macro to generate code for Objective C message sending using the
3153 calling convention of the NeXT system. This calling convention involves
3154 passing the object, the selector and the method arguments all at once to the
3155 method-lookup library function.
3157 The default calling convention passes just the object and the selector to
3158 the lookup function, which returns a pointer to the method. */
3159 /* #define NEXT_OBJC_RUNTIME */
3162 /* Addressing Modes */
3164 /* Define this macro if the machine supports post-increment addressing. */
3165 #define HAVE_POST_INCREMENT 1
3167 /* Similar for other kinds of addressing. */
3168 /* #define HAVE_PRE_INCREMENT 0 */
3169 #define HAVE_POST_DECREMENT 1
3170 /* #define HAVE_PRE_DECREMENT 0 */
3172 /* A C expression that is 1 if the RTX X is a constant which is a valid
3173 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
3174 few machines are more restrictive in which constant addresses are supported.
3176 `CONSTANT_P' accepts integer-values expressions whose values are not
3177 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
3178 and `const' arithmetic expressions, in addition to `const_int' and
3179 `const_double' expressions. */
3180 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
3182 /* A number, the maximum number of registers that can appear in a valid memory
3183 address. Note that it is up to you to specify a value equal to the maximum
3184 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
3185 #define MAX_REGS_PER_ADDRESS 2
3187 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
3188 RTX) is a legitimate memory address on the target machine for a memory
3189 operand of mode MODE.
3191 It usually pays to define several simpler macros to serve as subroutines for
3192 this one. Otherwise it may be too complicated to understand.
3194 This macro must exist in two variants: a strict variant and a non-strict
3195 one. The strict variant is used in the reload pass. It must be defined so
3196 that any pseudo-register that has not been allocated a hard register is
3197 considered a memory reference. In contexts where some kind of register is
3198 required, a pseudo-register with no hard register must be rejected.
3200 The non-strict variant is used in other passes. It must be defined to
3201 accept all pseudo-registers in every context where some kind of register is
3204 Compiler source files that want to use the strict variant of this macro
3205 define the macro `REG_OK_STRICT'. You should use an `#ifdef REG_OK_STRICT'
3206 conditional to define the strict variant in that case and the non-strict
3209 Subroutines to check for acceptable registers for various purposes (one for
3210 base registers, one for index registers, and so on) are typically among the
3211 subroutines used to define `GO_IF_LEGITIMATE_ADDRESS'. Then only these
3212 subroutine macros need have two variants; the higher levels of macros may be
3213 the same whether strict or not.
3215 Normally, constant addresses which are the sum of a `symbol_ref' and an
3216 integer are stored inside a `const' RTX to mark them as constant.
3217 Therefore, there is no need to recognize such sums specifically as
3218 legitimate addresses. Normally you would simply recognize any `const' as
3221 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant sums that
3222 are not marked with `const'. It assumes that a naked `plus' indicates
3223 indexing. If so, then you *must* reject such naked constant sums as
3224 illegitimate addresses, so that none of them will be given to
3225 `PRINT_OPERAND_ADDRESS'.
3227 On some machines, whether a symbolic address is legitimate depends on the
3228 section that the address refers to. On these machines, define the macro
3229 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
3230 then check for it here. When you see a `const', you will have to look
3231 inside it to find the `symbol_ref' in order to determine the section. *Note
3234 The best way to modify the name string is by adding text to the beginning,
3235 with suitable punctuation to prevent any ambiguity. Allocate the new name
3236 in `saveable_obstack'. You will have to modify `ASM_OUTPUT_LABELREF' to
3237 remove and decode the added text and output the name accordingly, and define
3238 `STRIP_NAME_ENCODING' to access the original name string.
3240 You can check the information stored here into the `symbol_ref' in the
3241 definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
3242 `PRINT_OPERAND_ADDRESS'. */
3244 #ifdef REG_OK_STRICT
3245 #define REG_OK_STRICT_P 1
3247 #define REG_OK_STRICT_P 0
3250 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
3252 if (d30v_legitimate_address_p ((int)MODE, X, REG_OK_STRICT_P)) \
3256 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3257 use as a base register. For hard registers, it should always accept those
3258 which the hardware permits and reject the others. Whether the macro accepts
3259 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
3260 described above. This usually requires two variant definitions, of which
3261 `REG_OK_STRICT' controls the one actually used. */
3263 #ifdef REG_OK_STRICT
3264 #define REG_OK_FOR_BASE_P(X) (GPR_P (REGNO (X)))
3266 #define REG_OK_FOR_BASE_P(X) (GPR_OR_PSEUDO_P (REGNO (X)))
3269 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3270 use as an index register.
3272 The difference between an index register and a base register is that the
3273 index register may be scaled. If an address involves the sum of two
3274 registers, neither one of them scaled, then either one may be labeled the
3275 "base" and the other the "index"; but whichever labeling is used must fit
3276 the machine's constraints of which registers may serve in each capacity.
3277 The compiler will try both labelings, looking for one that is valid, and
3278 will reload one or both registers only if neither labeling works. */
3280 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
3282 /* A C compound statement that attempts to replace X with a valid memory
3283 address for an operand of mode MODE. WIN will be a C statement label
3284 elsewhere in the code; the macro definition may use
3286 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
3288 to avoid further processing if the address has become legitimate.
3290 X will always be the result of a call to `break_out_memory_refs', and OLDX
3291 will be the operand that was given to that function to produce X.
3293 The code generated by this macro should not alter the substructure of X. If
3294 it transforms X into a more legitimate form, it should assign X (which will
3295 always be a C variable) a new value.
3297 It is not necessary for this macro to come up with a legitimate address.
3298 The compiler has standard ways of doing so in all cases. In fact, it is
3299 safe for this macro to do nothing. But often a machine-dependent strategy
3300 can generate better code. */
3302 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
3304 rtx y = d30v_legitimize_address (X, OLDX, (int)MODE, REG_OK_STRICT_P); \
3308 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); \
3312 /* A C statement or compound statement with a conditional `goto LABEL;'
3313 executed if memory address X (an RTX) can have different meanings depending
3314 on the machine mode of the memory reference it is used for or if the address
3315 is valid for some modes but not others.
3317 Autoincrement and autodecrement addresses typically have mode-dependent
3318 effects because the amount of the increment or decrement is the size of the
3319 operand being addressed. Some machines have other mode-dependent addresses.
3320 Many RISC machines have no mode-dependent addresses.
3322 You may assume that ADDR is a valid address for the machine. */
3324 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
3326 if (d30v_mode_dependent_address_p (ADDR)) \
3330 /* A C expression that is nonzero if X is a legitimate constant for an
3331 immediate operand on the target machine. You can assume that X satisfies
3332 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
3333 definition for this macro on machines where anything `CONSTANT_P' is valid. */
3334 #define LEGITIMATE_CONSTANT_P(X) 1
3337 /* Condition Code Status */
3339 /* C code for a data type which is used for declaring the `mdep' component of
3340 `cc_status'. It defaults to `int'.
3342 This macro is not used on machines that do not use `cc0'. */
3343 /* #define CC_STATUS_MDEP */
3345 /* A C expression to initialize the `mdep' field to "empty". The default
3346 definition does nothing, since most machines don't use the field anyway. If
3347 you want to use the field, you should probably define this macro to
3350 This macro is not used on machines that do not use `cc0'. */
3351 /* #define CC_STATUS_MDEP_INIT */
3353 /* A C compound statement to set the components of `cc_status' appropriately
3354 for an insn INSN whose body is EXP. It is this macro's responsibility to
3355 recognize insns that set the condition code as a byproduct of other activity
3356 as well as those that explicitly set `(cc0)'.
3358 This macro is not used on machines that do not use `cc0'.
3360 If there are insns that do not set the condition code but do alter other
3361 machine registers, this macro must check to see whether they invalidate the
3362 expressions that the condition code is recorded as reflecting. For example,
3363 on the 68000, insns that store in address registers do not set the condition
3364 code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status'
3365 unaltered for such insns. But suppose that the previous insn set the
3366 condition code based on location `a4@(102)' and the current insn stores a
3367 new value in `a4'. Although the condition code is not changed by this, it
3368 will no longer be true that it reflects the contents of `a4@(102)'.
3369 Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say
3370 that nothing is known about the condition code value.
3372 The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the
3373 results of peephole optimization: insns whose patterns are `parallel' RTXs
3374 containing various `reg', `mem' or constants which are just the operands.
3375 The RTL structure of these insns is not sufficient to indicate what the
3376 insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is
3377 just to run `CC_STATUS_INIT'.
3379 A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks
3380 at an attribute (*note Insn Attributes::.) named, for example, `cc'. This
3381 avoids having detailed information about patterns in two places, the `md'
3382 file and in `NOTICE_UPDATE_CC'. */
3383 /* #define NOTICE_UPDATE_CC(EXP, INSN) */
3385 /* A list of names to be used for additional modes for condition code values in
3386 registers (*note Jump Patterns::.). These names are added to `enum
3387 machine_mode' and all have class `MODE_CC'. By convention, they should
3388 start with `CC' and end with `mode'.
3390 You should only define this macro if your machine does not use `cc0' and
3391 only if additional modes are required. */
3392 /* #define EXTRA_CC_MODES */
3394 /* Returns a mode from class `MODE_CC' to be used when comparison operation
3395 code OP is applied to rtx X and Y. For example, on the Sparc,
3396 `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a
3397 description of the reason for this definition)
3399 #define SELECT_CC_MODE(OP,X,Y) \
3400 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
3401 ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \
3402 : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \
3403 || GET_CODE (X) == NEG) \
3404 ? CC_NOOVmode : CCmode))
3406 You need not define this macro if `EXTRA_CC_MODES' is not defined. */
3407 /* #define SELECT_CC_MODE(OP, X, Y) */
3409 /* One some machines not all possible comparisons are defined, but you can
3410 convert an invalid comparison into a valid one. For example, the Alpha does
3411 not have a `GT' comparison, but you can use an `LT' comparison instead and
3412 swap the order of the operands.
3414 On such machines, define this macro to be a C statement to do any required
3415 conversions. CODE is the initial comparison code and OP0 and OP1 are the
3416 left and right operands of the comparison, respectively. You should modify
3417 CODE, OP0, and OP1 as required.
3419 GNU CC will not assume that the comparison resulting from this macro is
3420 valid but will see if the resulting insn matches a pattern in the `md' file.
3422 You need not define this macro if it would never change the comparison code
3424 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
3426 /* A C expression whose value is one if it is always safe to reverse a
3427 comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for
3428 a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)'
3431 You need not define this macro if it would always returns zero or if the
3432 floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For
3433 example, here is the definition used on the Sparc, where floating-point
3434 inequality comparisons are always given `CCFPEmode':
3436 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */
3437 /* #define REVERSIBLE_CC_MODE(MODE) */
3440 /* Describing Relative Costs of Operations */
3442 /* A part of a C `switch' statement that describes the relative costs of
3443 constant RTL expressions. It must contain `case' labels for expression
3444 codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'.
3445 Each case must ultimately reach a `return' statement to return the relative
3446 cost of the use of that kind of constant value in an expression. The cost
3447 may depend on the precise value of the constant, which is available for
3448 examination in X, and the rtx code of the expression in which it is
3449 contained, found in OUTER_CODE.
3451 CODE is the expression code--redundant, since it can be obtained with
3454 /* On the d30v, consider operatnds that fit in a short instruction very
3455 cheap. However, at this time, it causes cse to generate incorrect
3456 code, so disable it for now. */
3458 #define CONST_COSTS(X, CODE, OUTER_CODE) \
3460 if (IN_RANGE_P (INTVAL (X), 0, 31)) \
3462 else if ((OUTER_CODE) == LEU && (OUTER_CODE) == LTU \
3463 && (OUTER_CODE) == GEU && (OUTER_CODE) == GTU) \
3464 return IN_RANGE_P (INTVAL (X), 32, 63) ? 0 : COSTS_N_INSNS (2); \
3466 return IN_RANGE_P (INTVAL (X), -31, -1) ? 0 : COSTS_N_INSNS (2); \
3470 return COSTS_N_INSNS (2); \
3471 case CONST_DOUBLE: \
3472 return COSTS_N_INSNS ((GET_MODE (X) == SFmode) ? 2 : 4);
3474 #define CONST_COSTS(X, CODE, OUTER_CODE)
3477 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be
3478 used, for example, to indicate how costly a multiply instruction is. In
3479 writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify
3480 a cost equal to N fast instructions. OUTER_CODE is the code of the
3481 expression in which X is contained.
3483 This macro is optional; do not define it if the default cost assumptions are
3484 adequate for the target machine. */
3485 #define RTX_COSTS(X, CODE, OUTER_CODE) \
3487 return COSTS_N_INSNS ((GET_CODE (XEXP (x, 1)) == CONST_INT \
3488 && exact_log2 (INTVAL (XEXP (x, 1))) >= 0) \
3491 /* An expression giving the cost of an addressing mode that contains ADDRESS.
3492 If not defined, the cost is computed from the ADDRESS expression and the
3493 `CONST_COSTS' values.
3495 For most CISC machines, the default cost is a good approximation of the true
3496 cost of the addressing mode. However, on RISC machines, all instructions
3497 normally have the same length and execution time. Hence all addresses will
3500 In cases where more than one form of an address is known, the form with the
3501 lowest cost will be used. If multiple forms have the same, lowest, cost,
3502 the one that is the most complex will be used.
3504 For example, suppose an address that is equal to the sum of a register and a
3505 constant is used twice in the same basic block. When this macro is not
3506 defined, the address will be computed in a register and memory references
3507 will be indirect through that register. On machines where the cost of the
3508 addressing mode containing the sum is no higher than that of a simple
3509 indirect reference, this will produce an additional instruction and possibly
3510 require an additional register. Proper specification of this macro
3511 eliminates this overhead for such machines.
3513 Similar use of this macro is made in strength reduction of loops.
3515 ADDRESS need not be valid as an address. In such a case, the cost is not
3516 relevant and can be any value; invalid addresses need not be assigned a
3519 On machines where an address involving more than one register is as cheap as
3520 an address computation involving only one register, defining `ADDRESS_COST'
3521 to reflect this can cause two registers to be live over a region of code
3522 where only one would have been if `ADDRESS_COST' were not defined in that
3523 manner. This effect should be considered in the definition of this macro.
3524 Equivalent costs should probably only be given to addresses with different
3525 numbers of registers on machines with lots of registers.
3527 This macro will normally either not be defined or be defined as a constant. */
3528 #define ADDRESS_COST(ADDRESS) 0
3530 /* A C expression for the cost of moving data from a register in class FROM to
3531 one in class TO. The classes are expressed using the enumeration values
3532 such as `GENERAL_REGS'. A value of 4 is the default; other values are
3533 interpreted relative to that.
3535 It is not required that the cost always equal 2 when FROM is the same as TO;
3536 on some machines it is expensive to move between registers if they are not
3539 If reload sees an insn consisting of a single `set' between two hard
3540 registers, and if `REGISTER_MOVE_COST' applied to their classes returns a
3541 value of 2, reload does not check to ensure that the constraints of the insn
3542 are met. Setting a cost of other than 2 will allow reload to verify that
3543 the constraints are met. You should do this if the `movM' pattern's
3544 constraints do not allow such copying. */
3546 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
3547 (((FROM) != GPR_REGS && (FROM) != EVEN_REGS \
3548 && (TO) != GPR_REGS && (TO) != EVEN_REGS) ? 4 : 2)
3550 /* A C expression for the cost of moving data of mode M between a register and
3551 memory. A value of 2 is the default; this cost is relative to those in
3552 `REGISTER_MOVE_COST'.
3554 If moving between registers and memory is more expensive than between two
3555 registers, you should define this macro to express the relative cost. */
3556 #define MEMORY_MOVE_COST(M,C,I) 4
3558 /* A C expression for the cost of a branch instruction. A value of 1 is the
3559 default; other values are interpreted relative to that. */
3561 #define BRANCH_COST d30v_branch_cost
3563 #define D30V_DEFAULT_BRANCH_COST 2
3565 /* Values of the -mbranch-cost=n string. */
3566 extern int d30v_branch_cost;
3567 extern const char *d30v_branch_cost_string;
3569 /* Here are additional macros which do not specify precise relative costs, but
3570 only that certain actions are more expensive than GNU CC would ordinarily
3573 /* Define this macro as a C expression which is nonzero if accessing less than
3574 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
3575 word of memory, i.e., if such access require more than one instruction or if
3576 there is no difference in cost between byte and (aligned) word loads.
3578 When this macro is not defined, the compiler will access a field by finding
3579 the smallest containing object; when it is defined, a fullword load will be
3580 used if alignment permits. Unless bytes accesses are faster than word
3581 accesses, using word accesses is preferable since it may eliminate
3582 subsequent memory access if subsequent accesses occur to other fields in the
3583 same word of the structure, but to different bytes. */
3584 #define SLOW_BYTE_ACCESS 1
3586 /* Define this macro if zero-extension (of a `char' or `short' to an `int') can
3587 be done faster if the destination is a register that is known to be zero.
3589 If you define this macro, you must have instruction patterns that recognize
3590 RTL structures like this:
3592 (set (strict_low_part (subreg:QI (reg:SI ...) 0)) ...)
3594 and likewise for `HImode'. */
3595 #define SLOW_ZERO_EXTEND 0
3597 /* Define this macro to be the value 1 if unaligned accesses have a cost many
3598 times greater than aligned accesses, for example if they are emulated in a
3601 When this macro is non-zero, the compiler will act as if `STRICT_ALIGNMENT'
3602 were non-zero when generating code for block moves. This can cause
3603 significantly more instructions to be produced. Therefore, do not set this
3604 macro non-zero if unaligned accesses only add a cycle or two to the time for
3607 If the value of this macro is always zero, it need not be defined. */
3608 /* #define SLOW_UNALIGNED_ACCESS */
3610 /* Define this macro to inhibit strength reduction of memory addresses. (On
3611 some machines, such strength reduction seems to do harm rather than good.) */
3612 /* #define DONT_REDUCE_ADDR */
3614 /* The number of scalar move insns which should be generated instead of a
3615 string move insn or a library call. Increasing the value will always make
3616 code faster, but eventually incurs high cost in increased code size.
3618 If you don't define this, a reasonable default is used. */
3619 /* #define MOVE_RATIO */
3621 /* Define this macro if it is as good or better to call a constant function
3622 address than to call an address kept in a register. */
3623 #define NO_FUNCTION_CSE
3625 /* Define this macro if it is as good or better for a function to call itself
3626 with an explicit address than to call an address kept in a register. */
3627 /* #define NO_RECURSIVE_FUNCTION_CSE */
3630 /* Dividing the output into sections. */
3632 /* A C expression whose value is a string containing the assembler operation
3633 that should precede instructions and read-only data. Normally `".text"' is
3635 #define TEXT_SECTION_ASM_OP "\t.text"
3637 /* A C expression whose value is a string containing the assembler operation to
3638 identify the following data as writable initialized data. Normally
3639 `".data"' is right. */
3640 #define DATA_SECTION_ASM_OP "\t.data"
3642 /* if defined, a C expression whose value is a string containing the assembler
3643 operation to identify the following data as shared data. If not defined,
3644 `DATA_SECTION_ASM_OP' will be used. */
3645 /* #define SHARED_SECTION_ASM_OP */
3647 /* If defined, a C expression whose value is a string containing the
3648 assembler operation to identify the following data as
3649 uninitialized global data. If not defined, and neither
3650 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
3651 uninitialized global data will be output in the data section if
3652 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
3654 #define BSS_SECTION_ASM_OP "\t.bss"
3656 /* If defined, a C expression whose value is a string containing the
3657 assembler operation to identify the following data as
3658 uninitialized global shared data. If not defined, and
3659 `BSS_SECTION_ASM_OP' is, the latter will be used. */
3660 /* #define SHARED_BSS_SECTION_ASM_OP */
3662 /* A list of names for sections other than the standard two, which are
3663 `in_text' and `in_data'. You need not define this macro on a system with no
3664 other sections (that GCC needs to use).
3666 Defined in svr4.h. */
3667 /* #define EXTRA_SECTIONS */
3669 /* One or more functions to be defined in `varasm.c'. These functions should
3670 do jobs analogous to those of `text_section' and `data_section', for your
3671 additional sections. Do not define this macro if you do not define
3674 Defined in svr4.h. */
3675 /* #define EXTRA_SECTION_FUNCTIONS */
3677 /* On most machines, read-only variables, constants, and jump tables are placed
3678 in the text section. If this is not the case on your machine, this macro
3679 should be defined to be the name of a function (either `data_section' or a
3680 function defined in `EXTRA_SECTIONS') that switches to the section to be
3681 used for read-only items.
3683 If these items should be placed in the text section, this macro should not
3685 /* #define READONLY_DATA_SECTION */
3687 /* A C statement or statements to switch to the appropriate section for output
3688 of EXP. You can assume that EXP is either a `VAR_DECL' node or a constant
3689 of some sort. RELOC indicates whether the initial value of EXP requires
3690 link-time relocations. Select the section by calling `text_section' or one
3691 of the alternatives for other sections.
3693 Do not define this macro if you put all read-only variables and constants in
3694 the read-only data section (usually the text section).
3696 Defined in svr4.h. */
3697 /* #define SELECT_SECTION(EXP, RELOC, ALIGN) */
3699 /* A C statement or statements to switch to the appropriate section for output
3700 of RTX in mode MODE. You can assume that RTX is some kind of constant in
3701 RTL. The argument MODE is redundant except in the case of a `const_int'
3702 rtx. Select the section by calling `text_section' or one of the
3703 alternatives for other sections.
3705 Do not define this macro if you put all constants in the read-only data
3708 Defined in svr4.h. */
3709 /* #define SELECT_RTX_SECTION(MODE, RTX, ALIGN) */
3711 /* Define this macro if jump tables (for `tablejump' insns) should be output in
3712 the text section, along with the assembler instructions. Otherwise, the
3713 readonly data section is used.
3715 This macro is irrelevant if there is no separate readonly data section. */
3716 /* #define JUMP_TABLES_IN_TEXT_SECTION */
3718 /* Define this macro if references to a symbol must be treated differently
3719 depending on something about the variable or function named by the symbol
3720 (such as what section it is in).
3722 The macro definition, if any, is executed immediately after the rtl for DECL
3723 has been created and stored in `DECL_RTL (DECL)'. The value of the rtl will
3724 be a `mem' whose address is a `symbol_ref'.
3726 The usual thing for this macro to do is to record a flag in the `symbol_ref'
3727 (such as `SYMBOL_REF_FLAG') or to store a modified name string in the
3728 `symbol_ref' (if one bit is not enough information). */
3729 /* #define ENCODE_SECTION_INFO(DECL) */
3731 /* Decode SYM_NAME and store the real name part in VAR, sans the characters
3732 that encode section info. Define this macro if `ENCODE_SECTION_INFO' alters
3733 the symbol's name string. */
3734 /* #define STRIP_NAME_ENCODING(VAR, SYM_NAME) */
3736 /* A C statement to build up a unique section name, expressed as a
3737 STRING_CST node, and assign it to `DECL_SECTION_NAME (DECL)'.
3738 RELOC indicates whether the initial value of EXP requires
3739 link-time relocations. If you do not define this macro, GNU CC
3740 will use the symbol name prefixed by `.' as the section name.
3742 Defined in svr4.h. */
3743 /* #define UNIQUE_SECTION(DECL, RELOC) */
3746 /* Position Independent Code. */
3748 /* The register number of the register used to address a table of static data
3749 addresses in memory. In some cases this register is defined by a
3750 processor's "application binary interface" (ABI). When this macro is
3751 defined, RTL is generated for this register once, as with the stack pointer
3752 and frame pointer registers. If this macro is not defined, it is up to the
3753 machine-dependent files to allocate such a register (if necessary). */
3754 /* #define PIC_OFFSET_TABLE_REGNUM */
3756 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
3757 clobbered by calls. Do not define this macro if `PIC_OFFSET_TABLE_REGNUM'
3759 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */
3761 /* By generating position-independent code, when two different programs (A and
3762 B) share a common library (libC.a), the text of the library can be shared
3763 whether or not the library is linked at the same address for both programs.
3764 In some of these environments, position-independent code requires not only
3765 the use of different addressing modes, but also special code to enable the
3766 use of these addressing modes.
3768 The `FINALIZE_PIC' macro serves as a hook to emit these special codes once
3769 the function is being compiled into assembly code, but not before. (It is
3770 not done before, because in the case of compiling an inline function, it
3771 would lead to multiple PIC prologues being included in functions which used
3772 inline functions and were compiled to assembly language.) */
3773 /* #define FINALIZE_PIC */
3775 /* A C expression that is nonzero if X is a legitimate immediate operand on the
3776 target machine when generating position independent code. You can assume
3777 that X satisfies `CONSTANT_P', so you need not check this. You can also
3778 assume FLAG_PIC is true, so you need not check it either. You need not
3779 define this macro if all constants (including `SYMBOL_REF') can be immediate
3780 operands when generating position independent code. */
3781 /* #define LEGITIMATE_PIC_OPERAND_P(X) */
3784 /* The Overall Framework of an Assembler File. */
3786 /* A C expression which outputs to the stdio stream STREAM some appropriate
3787 text to go at the start of an assembler file.
3789 Normally this macro is defined to output a line containing `#NO_APP', which
3790 is a comment that has no effect on most assemblers but tells the GNU
3791 assembler that it can save time by not checking for certain assembler
3794 On systems that use SDB, it is necessary to output certain commands; see
3797 Defined in svr4.h. */
3799 /* #define ASM_FILE_START(STREAM) \
3800 output_file_directive ((STREAM), main_input_filename) */
3802 /* A C expression which outputs to the stdio stream STREAM some appropriate
3803 text to go at the end of an assembler file.
3805 If this macro is not defined, the default is to output nothing special at
3806 the end of the file. Most systems don't require any definition.
3808 On systems that use SDB, it is necessary to output certain commands; see
3811 Defined in svr4.h. */
3812 /* #define ASM_FILE_END(STREAM) */
3814 /* A C string constant describing how to begin a comment in the target
3815 assembler language. The compiler assumes that the comment will end at the
3817 #define ASM_COMMENT_START ";"
3819 /* A C string constant for text to be output before each `asm' statement or
3820 group of consecutive ones. Normally this is `"#APP"', which is a comment
3821 that has no effect on most assemblers but tells the GNU assembler that it
3822 must check the lines that follow for all valid assembler constructs. */
3823 #define ASM_APP_ON "#APP\n"
3825 /* A C string constant for text to be output after each `asm' statement or
3826 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
3827 GNU assembler to resume making the time-saving assumptions that are valid
3828 for ordinary compiler output. */
3829 #define ASM_APP_OFF "#NO_APP\n"
3831 /* A C statement to output COFF information or DWARF debugging information
3832 which indicates that filename NAME is the current source file to the stdio
3835 This macro need not be defined if the standard form of output for the file
3836 format in use is appropriate. */
3837 /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
3839 /* A C statement to output DBX or SDB debugging information before code for
3840 line number LINE of the current source file to the stdio stream STREAM.
3842 This macro need not be defined if the standard form of debugging information
3843 for the debugger in use is appropriate.
3845 Defined in svr4.h. */
3846 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */
3848 /* A C statement to output something to the assembler file to handle a `#ident'
3849 directive containing the text STRING. If this macro is not defined, nothing
3850 is output for a `#ident' directive.
3852 Defined in svr4.h. */
3853 /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */
3855 /* A C statement to output any assembler statements which are required to
3856 precede any Objective C object definitions or message sending. The
3857 statement is executed only when compiling an Objective C program. */
3858 /* #define OBJC_PROLOGUE */
3861 /* Output of Data. */
3863 /* A C statement to output to the stdio stream STREAM an assembler instruction
3864 to assemble a floating-point constant of `TFmode', `DFmode', `SFmode',
3865 `TQFmode', `HFmode', or `QFmode', respectively, whose value is VALUE. VALUE
3866 will be a C expression of type `REAL_VALUE_TYPE'. Macros such as
3867 `REAL_VALUE_TO_TARGET_DOUBLE' are useful for writing these definitions. */
3869 /* #define ASM_OUTPUT_LONG_DOUBLE(STREAM, VALUE) */
3871 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
3873 if (REAL_VALUE_ISINF (VALUE) \
3874 || REAL_VALUE_ISNAN (VALUE) \
3875 || REAL_VALUE_MINUS_ZERO (VALUE)) \
3878 REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \
3879 fprintf (FILE, "\t.long 0x%lx\n\t.long 0x%lx\n", \
3880 t[0] & 0xffffffff, t[1] & 0xffffffff); \
3885 REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", str); \
3886 fprintf (FILE, "\t.double 0d%s\n", str); \
3890 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
3892 if (REAL_VALUE_ISINF (VALUE) \
3893 || REAL_VALUE_ISNAN (VALUE) \
3894 || REAL_VALUE_MINUS_ZERO (VALUE)) \
3897 REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
3898 fprintf (FILE, "\t.long 0x%lx\n", t & 0xffffffff); \
3903 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \
3904 fprintf (FILE, "\t.float 0d%s\n", str); \
3908 /* #define ASM_OUTPUT_THREE_QUARTER_FLOAT(STREAM, VALUE) */
3909 /* #define ASM_OUTPUT_SHORT_FLOAT(STREAM, VALUE) */
3910 /* #define ASM_OUTPUT_BYTE_FLOAT(STREAM, VALUE) */
3912 /* A C statement to output to the stdio stream STREAM an assembler instruction
3913 to assemble an integer of 16, 8, 4, 2 or 1 bytes, respectively, whose value
3914 is VALUE. The argument EXP will be an RTL expression which represents a
3915 constant value. Use `output_addr_const (STREAM, EXP)' to output this value
3916 as an assembler expression.
3918 For sizes larger than `UNITS_PER_WORD', if the action of a macro would be
3919 identical to repeatedly calling the macro corresponding to a size of
3920 `UNITS_PER_WORD', once for each word, you need not define the macro. */
3922 /* #define ASM_OUTPUT_QUADRUPLE_INT(STREAM, EXP) */
3923 /* #define ASM_OUTPUT_DOUBLE_INT(STREAM, EXP) */
3925 #define ASM_OUTPUT_INT(STREAM, EXP) \
3927 fputs ("\t.word ", STREAM); \
3928 output_addr_const (STREAM, EXP); \
3929 putc ('\n', STREAM); \
3932 #define ASM_OUTPUT_SHORT(STREAM, EXP) \
3934 fputs ("\t.hword ", STREAM); \
3935 output_addr_const (STREAM, EXP); \
3936 putc ('\n', STREAM); \
3939 #define ASM_OUTPUT_CHAR(STREAM, EXP) \
3941 fputs ("\t.byte ", STREAM); \
3942 output_addr_const (STREAM, EXP); \
3943 putc ('\n', STREAM); \
3946 /* A C statement to output to the stdio stream STREAM an assembler instruction
3947 to assemble a single byte containing the number VALUE. */
3949 #define ASM_OUTPUT_BYTE(STREAM, VALUE) \
3950 fprintf (STREAM, "%s%d\n", ASM_BYTE_OP, (int)(VALUE))
3952 /* A C string constant giving the pseudo-op to use for a sequence of
3953 single-byte constants. If this macro is not defined, the default
3956 Defined in svr4.h. */
3957 /* #define ASM_BYTE_OP */
3959 /* A C statement to output to the stdio stream STREAM an assembler instruction
3960 to assemble a string constant containing the LEN bytes at PTR. PTR will be
3961 a C expression of type `char *' and LEN a C expression of type `int'.
3963 If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix
3964 assembler, do not define the macro `ASM_OUTPUT_ASCII'.
3966 Defined in svr4.h. */
3967 /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */
3969 /* You may define this macro as a C expression. You should define the
3970 expression to have a non-zero value if GNU CC should output the
3971 constant pool for a function before the code for the function, or
3972 a zero value if GNU CC should output the constant pool after the
3973 function. If you do not define this macro, the usual case, GNU CC
3974 will output the constant pool before the function. */
3975 /* #define CONSTANT_POOL_BEFORE_FUNCTION */
3977 /* A C statement to output assembler commands to define the start of the
3978 constant pool for a function. FUNNAME is a string giving the name of the
3979 function. Should the return type of the function be required, it can be
3980 obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that
3981 will be written immediately after this call.
3983 If no constant-pool prefix is required, the usual case, this macro need not
3985 /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */
3987 /* A C statement (with or without semicolon) to output a constant in the
3988 constant pool, if it needs special treatment. (This macro need not do
3989 anything for RTL expressions that can be output normally.)
3991 The argument FILE is the standard I/O stream to output the assembler code
3992 on. X is the RTL expression for the constant to output, and MODE is the
3993 machine mode (in case X is a `const_int'). ALIGN is the required alignment
3994 for the value X; you should output an assembler directive to force this much
3997 The argument LABELNO is a number to use in an internal label for the address
3998 of this pool entry. The definition of this macro is responsible for
3999 outputting the label definition at the proper place. Here is how to do
4002 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO);
4004 When you output a pool entry specially, you should end with a `goto' to the
4005 label JUMPTO. This will prevent the same pool entry from being output a
4006 second time in the usual manner.
4008 You need not define this macro if it would do nothing. */
4009 /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */
4011 /* Define this macro as a C expression which is nonzero if the constant EXP, of
4012 type `tree', should be output after the code for a function. The compiler
4013 will normally output all constants before the function; you need not define
4014 this macro if this is OK. */
4015 /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */
4017 /* A C statement to output assembler commands to at the end of the constant
4018 pool for a function. FUNNAME is a string giving the name of the function.
4019 Should the return type of the function be required, you can obtain it via
4020 FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote
4021 immediately before this call.
4023 If no constant-pool epilogue is required, the usual case, you need not
4024 define this macro. */
4025 /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */
4027 /* Define this macro as a C expression which is nonzero if C is used as a
4028 logical line separator by the assembler.
4030 If you do not define this macro, the default is that only the character `;'
4031 is treated as a logical line separator. */
4032 /* #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) */
4034 /* These macros are provided by `real.h' for writing the definitions of
4035 `ASM_OUTPUT_DOUBLE' and the like: */
4037 /* These translate X, of type `REAL_VALUE_TYPE', to the target's floating point
4038 representation, and store its bit pattern in the array of `long int' whose
4039 address is L. The number of elements in the output array is determined by
4040 the size of the desired target floating point data type: 32 bits of it go in
4041 each `long int' array element. Each array element holds 32 bits of the
4042 result, even if `long int' is wider than 32 bits on the host machine.
4044 The array element values are designed so that you can print them out using
4045 `fprintf' in the order they should appear in the target machine's memory. */
4046 /* #define REAL_VALUE_TO_TARGET_SINGLE(X, L) */
4047 /* #define REAL_VALUE_TO_TARGET_DOUBLE(X, L) */
4048 /* #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(X, L) */
4050 /* This macro converts X, of type `REAL_VALUE_TYPE', to a decimal number and
4051 stores it as a string into STRING. You must pass, as STRING, the address of
4052 a long enough block of space to hold the result.
4054 The argument FORMAT is a `printf'-specification that serves as a suggestion
4055 for how to format the output string. */
4056 /* #define REAL_VALUE_TO_DECIMAL(X, FORMAT, STRING) */
4059 /* Output of Uninitialized Variables. */
4061 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4062 assembler definition of a common-label named NAME whose size is SIZE bytes.
4063 The variable ROUNDED is the size rounded up to whatever alignment the caller
4066 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
4067 before and after that, output the additional assembler syntax for defining
4068 the name, and a newline.
4070 This macro controls how the assembler definitions of uninitialized global
4071 variables are output. */
4072 /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */
4074 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate,
4075 explicit argument. If you define this macro, it is used in place of
4076 `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required
4077 alignment of the variable. The alignment is specified as the number of
4080 Defined in svr4.h. */
4081 /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */
4083 /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument -
4084 the DECL of the variable to be output, if there is one. This macro can be
4085 called with DECL == NULL_TREE. If you define this macro, it is used in
4086 place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you
4087 more flexibility in handling the destination of the variable. */
4088 /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4090 /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used
4091 when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */
4092 /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */
4094 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4095 assembler definition of uninitialized global DECL named NAME whose size is
4096 SIZE bytes. The variable ROUNDED is the size rounded up to whatever
4097 alignment the caller wants.
4099 Try to use function `asm_output_bss' defined in `varasm.c' when defining
4100 this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to
4101 output the name itself; before and after that, output the additional
4102 assembler syntax for defining the name, and a newline.
4104 This macro controls how the assembler definitions of uninitialized global
4105 variables are output. This macro exists to properly support languages like
4106 `c++' which do not have `common' data. However, this macro currently is not
4107 defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not
4108 defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or
4109 `ASM_OUTPUT_DECL_COMMON' is used. */
4110 /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
4112 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate,
4113 explicit argument. If you define this macro, it is used in place of
4114 `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required
4115 alignment of the variable. The alignment is specified as the number of
4118 Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when
4119 defining this macro. */
4120 /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4122 /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when
4123 NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */
4124 /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
4126 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4127 assembler definition of a local-common-label named NAME whose size is SIZE
4128 bytes. The variable ROUNDED is the size rounded up to whatever alignment
4131 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
4132 before and after that, output the additional assembler syntax for defining
4133 the name, and a newline.
4135 This macro controls how the assembler definitions of uninitialized static
4136 variables are output. */
4137 /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */
4139 /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate,
4140 explicit argument. If you define this macro, it is used in place of
4141 `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required
4142 alignment of the variable. The alignment is specified as the number of
4145 Defined in svr4.h. */
4146 /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */
4148 /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional
4149 parameter - the DECL of variable to be output, if there is one.
4150 This macro can be called with DECL == NULL_TREE. If you define
4151 this macro, it is used in place of `ASM_OUTPUT_LOCAL' and
4152 `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in
4153 handling the destination of the variable. */
4154 /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4156 /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when
4157 NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */
4158 /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */
4161 /* Output and Generation of Labels. */
4163 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4164 assembler definition of a label named NAME. Use the expression
4165 `assemble_name (STREAM, NAME)' to output the name itself; before and after
4166 that, output the additional assembler syntax for defining the name, and a
4169 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
4171 assemble_name (STREAM, NAME); \
4172 fputs (":\n", STREAM); \
4175 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4176 necessary for declaring the name NAME of a function which is being defined.
4177 This macro is responsible for outputting the label definition (perhaps using
4178 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node
4179 representing the function.
4181 If this macro is not defined, then the function name is defined in the usual
4182 manner as a label (by means of `ASM_OUTPUT_LABEL').
4184 Defined in svr4.h. */
4185 /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */
4187 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4188 necessary for declaring the size of a function which is being defined. The
4189 argument NAME is the name of the function. The argument DECL is the
4190 `FUNCTION_DECL' tree node representing the function.
4192 If this macro is not defined, then the function size is not defined.
4194 Defined in svr4.h. */
4195 /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */
4197 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4198 necessary for declaring the name NAME of an initialized variable which is
4199 being defined. This macro must output the label definition (perhaps using
4200 `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node
4201 representing the variable.
4203 If this macro is not defined, then the variable name is defined in the usual
4204 manner as a label (by means of `ASM_OUTPUT_LABEL').
4206 Defined in svr4.h. */
4207 /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */
4209 /* A C statement (sans semicolon) to finish up declaring a variable name once
4210 the compiler has processed its initializer fully and thus has had a chance
4211 to determine the size of an array when controlled by an initializer. This
4212 is used on systems where it's necessary to declare something about the size
4215 If you don't define this macro, that is equivalent to defining it to do
4218 Defined in svr4.h. */
4219 /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */
4221 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4222 commands that will make the label NAME global; that is, available for
4223 reference from other files. Use the expression `assemble_name (STREAM,
4224 NAME)' to output the name itself; before and after that, output the
4225 additional assembler syntax for making that name global, and a newline. */
4227 #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \
4229 fputs ("\t.globl ", STREAM); \
4230 assemble_name (STREAM, NAME); \
4231 fputs ("\n", STREAM); \
4234 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4235 commands that will make the label NAME weak; that is, available for
4236 reference from other files but only used if no other definition is
4237 available. Use the expression `assemble_name (STREAM, NAME)' to output the
4238 name itself; before and after that, output the additional assembler syntax
4239 for making that name weak, and a newline.
4241 If you don't define this macro, GNU CC will not support weak symbols and you
4242 should not define the `SUPPORTS_WEAK' macro.
4244 Defined in svr4.h. */
4245 /* #define ASM_WEAKEN_LABEL */
4247 /* A C expression which evaluates to true if the target supports weak symbols.
4249 If you don't define this macro, `defaults.h' provides a default definition.
4250 If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise,
4251 it is `0'. Define this macro if you want to control weak symbol support
4252 with a compiler flag such as `-melf'. */
4253 /* #define SUPPORTS_WEAK */
4255 /* A C statement (sans semicolon) to mark DECL to be emitted as a
4256 public symbol such that extra copies in multiple translation units
4257 will be discarded by the linker. Define this macro if your object
4258 file format provides support for this concept, such as the `COMDAT'
4259 section flags in the Microsoft Windows PE/COFF format, and this
4260 support requires changes to DECL, such as putting it in a separate
4263 Defined in svr4.h. */
4264 /* #define MAKE_DECL_ONE_ONLY */
4266 /* A C expression which evaluates to true if the target supports one-only
4269 If you don't define this macro, `varasm.c' provides a default definition.
4270 If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1';
4271 otherwise, it is `0'. Define this macro if you want to control one-only
4272 symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag
4273 is enough to mark a declaration to be emitted as one-only. */
4274 /* #define SUPPORTS_ONE_ONLY */
4276 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4277 necessary for declaring the name of an external symbol named NAME which is
4278 referenced in this compilation but not defined. The value of DECL is the
4279 tree node for the declaration.
4281 This macro need not be defined if it does not need to output anything. The
4282 GNU assembler and most Unix assemblers don't require anything. */
4283 /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */
4285 /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to
4286 declare a library function name external. The name of the library function
4287 is given by SYMREF, which has type `rtx' and is a `symbol_ref'.
4289 This macro need not be defined if it does not need to output anything. The
4290 GNU assembler and most Unix assemblers don't require anything.
4292 Defined in svr4.h. */
4293 /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */
4295 /* A C statement (sans semicolon) to output to the stdio stream STREAM a
4296 reference in assembler syntax to a label named NAME. This should add `_' to
4297 the front of the name, if that is customary on your operating system, as it
4298 is in most Berkeley Unix systems. This macro is used in `assemble_name'. */
4299 /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */
4301 /* A C statement to output to the stdio stream STREAM a label whose name is
4302 made from the string PREFIX and the number NUM.
4304 It is absolutely essential that these labels be distinct from the labels
4305 used for user-level functions and variables. Otherwise, certain programs
4306 will have name conflicts with internal labels.
4308 It is desirable to exclude internal labels from the symbol table of the
4309 object file. Most assemblers have a naming convention for labels that
4310 should be excluded; on many systems, the letter `L' at the beginning of a
4311 label has this effect. You should find out what convention your system
4312 uses, and follow it.
4314 The usual definition of this macro is as follows:
4316 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM)
4318 Defined in svr4.h. */
4319 /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */
4321 /* A C statement to store into the string STRING a label whose name is made
4322 from the string PREFIX and the number NUM.
4324 This string, when output subsequently by `assemble_name', should produce the
4325 output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX
4328 If the string begins with `*', then `assemble_name' will output the rest of
4329 the string unchanged. It is often convenient for
4330 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't
4331 start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and
4332 may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your
4333 machine description, so you should know what it does on your machine.)
4335 Defined in svr4.h. */
4338 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
4340 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
4344 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
4345 newly allocated string made from the string NAME and the number NUMBER, with
4346 some suitable punctuation added. Use `alloca' to get space for the string.
4348 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
4349 an assembler label for an internal static variable whose name is NAME.
4350 Therefore, the string must be such as to result in valid assembler code.
4351 The argument NUMBER is different each time this macro is executed; it
4352 prevents conflicts between similarly-named internal static variables in
4355 Ideally this string should not be a valid C identifier, to prevent any
4356 conflict with the user's own symbols. Most assemblers allow periods or
4357 percent signs in assembler symbols; putting at least one of these between
4358 the name and the number will suffice. */
4360 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
4362 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
4363 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
4366 /* A C statement to output to the stdio stream STREAM assembler code which
4367 defines (equates) the symbol NAME to have the value VALUE.
4369 If SET_ASM_OP is defined, a default definition is provided which is correct
4372 Defined in svr4.h. */
4373 /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */
4375 /* A C statement to output to the stdio stream STREAM assembler code which
4376 defines (equates) the weak symbol NAME to have the value VALUE.
4378 Define this macro if the target only supports weak aliases; define
4379 ASM_OUTPUT_DEF instead if possible. */
4380 /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */
4382 /* Define this macro to override the default assembler names used for Objective
4385 The default name is a unique method number followed by the name of the class
4386 (e.g. `_1_Foo'). For methods in categories, the name of the category is
4387 also included in the assembler name (e.g. `_1_Foo_Bar').
4389 These names are safe on most systems, but make debugging difficult since the
4390 method's selector is not present in the name. Therefore, particular systems
4391 define other ways of computing names.
4393 BUF is an expression of type `char *' which gives you a buffer in which to
4394 store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME
4395 put together, plus 50 characters extra.
4397 The argument IS_INST specifies whether the method is an instance method or a
4398 class method; CLASS_NAME is the name of the class; CAT_NAME is the name of
4399 the category (or NULL if the method is not in a category); and SEL_NAME is
4400 the name of the selector.
4402 On systems where the assembler can handle quoted names, you can use this
4403 macro to provide more human-readable names. */
4404 /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */
4407 /* Macros Controlling Initialization Routines. */
4409 /* If defined, a C string constant for the assembler operation to identify the
4410 following data as initialization code. If not defined, GNU CC will assume
4411 such a section does not exist. When you are using special sections for
4412 initialization and termination functions, this macro also controls how
4413 `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions.
4415 Defined in svr4.h. */
4416 /* #define INIT_SECTION_ASM_OP */
4417 #undef INIT_SECTION_ASM_OP
4419 /* If defined, `main' will not call `__main' as described above. This macro
4420 should be defined for systems that control the contents of the init section
4421 on a symbol-by-symbol basis, such as OSF/1, and should not be defined
4422 explicitly for systems that support `INIT_SECTION_ASM_OP'. */
4423 /* #define HAS_INIT_SECTION */
4425 /* If defined, a C string constant for a switch that tells the linker that the
4426 following symbol is an initialization routine. */
4427 /* #define LD_INIT_SWITCH */
4429 /* If defined, a C string constant for a switch that tells the linker that the
4430 following symbol is a finalization routine. */
4431 /* #define LD_FINI_SWITCH */
4433 /* If defined, `main' will call `__main' despite the presence of
4434 `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the
4435 init section is not actually run automatically, but is still useful for
4436 collecting the lists of constructors and destructors. */
4437 #define INVOKE__main
4439 /* If your system uses `collect2' as the means of processing constructors, then
4440 that program normally uses `nm' to scan an object file for constructor
4441 functions to be called. On certain kinds of systems, you can define these
4442 macros to make `collect2' work faster (and, in some cases, make it work at
4445 /* Define this macro if the system uses COFF (Common Object File Format) object
4446 files, so that `collect2' can assume this format and scan object files
4447 directly for dynamic constructor/destructor functions. */
4448 /* #define OBJECT_FORMAT_COFF */
4450 /* Define this macro if the system uses ROSE format object files, so that
4451 `collect2' can assume this format and scan object files directly for dynamic
4452 constructor/destructor functions.
4454 These macros are effective only in a native compiler; `collect2' as
4455 part of a cross compiler always uses `nm' for the target machine. */
4456 /* #define OBJECT_FORMAT_ROSE */
4458 /* Define this macro if the system uses ELF format object files.
4460 Defined in svr4.h. */
4461 /* #define OBJECT_FORMAT_ELF */
4463 /* Define this macro as a C string constant containing the file name to use to
4464 execute `nm'. The default is to search the path normally for `nm'.
4466 If your system supports shared libraries and has a program to list the
4467 dynamic dependencies of a given library or executable, you can define these
4468 macros to enable support for running initialization and termination
4469 functions in shared libraries: */
4470 /* #define REAL_NM_FILE_NAME */
4472 /* Define this macro to a C string constant containing the name of the program
4473 which lists dynamic dependencies, like `"ldd"' under SunOS 4. */
4474 /* #define LDD_SUFFIX */
4476 /* Define this macro to be C code that extracts filenames from the output of
4477 the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *'
4478 that points to the beginning of a line of output from `LDD_SUFFIX'. If the
4479 line lists a dynamic dependency, the code must advance PTR to the beginning
4480 of the filename on that line. Otherwise, it must set PTR to `NULL'. */
4481 /* #define PARSE_LDD_OUTPUT (PTR) */
4484 /* Output of Assembler Instructions. */
4486 /* A C initializer containing the assembler's names for the machine registers,
4487 each one as a C string constant. This is what translates register numbers
4488 in the compiler into assembler language. */
4489 #define REGISTER_NAMES \
4491 "r0", "r1", "r2", "r3", \
4492 "r4", "r5", "r6", "r7", \
4493 "r8", "r9", "r10", "r11", \
4494 "r12", "r13", "r14", "r15", \
4495 "r16", "r17", "r18", "r19", \
4496 "r20", "r21", "r22", "r23", \
4497 "r24", "r25", "r26", "r27", \
4498 "r28", "r29", "r30", "r31", \
4499 "r32", "r33", "r34", "r35", \
4500 "r36", "r37", "r38", "r39", \
4501 "r40", "r41", "r42", "r43", \
4502 "r44", "r45", "r46", "r47", \
4503 "r48", "r49", "r50", "r51", \
4504 "r52", "r53", "r54", "r55", \
4505 "r56", "r57", "r58", "r59", \
4506 "r60", "r61", "link", "sp", \
4508 "f0", "f1", "f2", "f3", \
4509 "s", "v", "va", "c", \
4511 "psw", "bpsw", "pc", "bpc", \
4512 "dpsw", "dpc", "rpt_c", "rpt_s", \
4513 "rpt_e", "mod_s", "mod_e", "iba", \
4514 "eit_vb", "int_s", "int_m", \
4517 /* If defined, a C initializer for an array of structures containing a name and
4518 a register number. This macro defines additional names for hard registers,
4519 thus allowing the `asm' option in declarations to refer to registers using
4521 #define ADDITIONAL_REGISTER_NAMES \
4523 {"r62", GPR_LINK}, \
4526 {"f5", FLAG_OVERFLOW}, \
4527 {"f6", FLAG_ACC_OVER}, \
4528 {"f7", FLAG_CARRY}, \
4529 {"carry", FLAG_CARRY}, \
4530 {"borrow", FLAG_BORROW}, \
4531 {"b", FLAG_BORROW}, \
4538 {"cr7", CR_RPT_C}, \
4539 {"cr8", CR_RPT_S}, \
4540 {"cr9", CR_RPT_E}, \
4541 {"cr10", CR_MOD_S}, \
4542 {"cr11", CR_MOD_E}, \
4544 {"cr15", CR_EIT_VB}, \
4545 {"cr16", CR_INT_S}, \
4546 {"cr17", CR_INT_M} \
4549 /* Define this macro if you are using an unusual assembler that requires
4550 different names for the machine instructions.
4552 The definition is a C statement or statements which output an assembler
4553 instruction opcode to the stdio stream STREAM. The macro-operand PTR is a
4554 variable of type `char *' which points to the opcode name in its "internal"
4555 form--the form that is written in the machine description. The definition
4556 should output the opcode name to STREAM, performing any translation you
4557 desire, and increment the variable PTR to point at the end of the opcode so
4558 that it will not be output twice.
4560 In fact, your macro definition may process less than the entire opcode name,
4561 or more than the opcode name; but if you want to process text that includes
4562 `%'-sequences to substitute operands, you must take care of the substitution
4563 yourself. Just be sure to increment PTR over whatever text should not be
4566 If you need to look at the operand values, they can be found as the elements
4567 of `recog_data.operand'.
4569 If the macro definition does nothing, the instruction is output in the usual
4571 /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */
4573 /* If defined, a C statement to be executed just prior to the output of
4574 assembler code for INSN, to modify the extracted operands so they will be
4577 Here the argument OPVEC is the vector containing the operands extracted from
4578 INSN, and NOPERANDS is the number of elements of the vector which contain
4579 meaningful data for this insn. The contents of this vector are what will be
4580 used to convert the insn template into assembler code, so you can change the
4581 assembler output by changing the contents of the vector.
4583 This macro is useful when various assembler syntaxes share a single file of
4584 instruction patterns; by defining this macro differently, you can cause a
4585 large class of instructions to be output differently (such as with
4586 rearranged operands). Naturally, variations in assembler syntax affecting
4587 individual insn patterns ought to be handled by writing conditional output
4588 routines in those patterns.
4590 If this macro is not defined, it is equivalent to a null statement. */
4591 /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */
4593 /* If defined, `FINAL_PRESCAN_INSN' will be called on each
4594 `CODE_LABEL'. In that case, OPVEC will be a null pointer and
4595 NOPERANDS will be zero. */
4596 /* #define FINAL_PRESCAN_LABEL */
4598 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4599 for an instruction operand X. X is an RTL expression.
4601 CODE is a value that can be used to specify one of several ways of printing
4602 the operand. It is used when identical operands must be printed differently
4603 depending on the context. CODE comes from the `%' specification that was
4604 used to request printing of the operand. If the specification was just
4605 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
4606 the ASCII code for LTR.
4608 If X is a register, this macro should print the register's name. The names
4609 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
4610 is initialized from `REGISTER_NAMES'.
4612 When the machine description has a specification `%PUNCT' (a `%' followed by
4613 a punctuation character), this macro is called with a null pointer for X and
4614 the punctuation character for CODE.
4616 Standard operand flags that are handled elsewhere:
4617 `=' Output a number unique to each instruction in the compilation.
4618 `a' Substitute an operand as if it were a memory reference.
4619 `c' Omit the syntax that indicates an immediate operand.
4620 `l' Substitute a LABEL_REF into a jump instruction.
4621 `n' Like %cDIGIT, except negate the value before printing.
4623 The d30v specific operand flags are:
4625 `f' Print a SF constant as an int.
4626 `s' Subtract 32 and negate.
4627 `A' Print accumulator number without an `a' in front of it.
4628 `B' Print bit offset for BSET, etc. instructions.
4629 `E' Print u if this is zero extend, nothing if this is sign extend.
4630 `F' Emit /{f,t,x}{f,t,x} for executing a false condition.
4631 `L' Print the lower half of a 64 bit item.
4632 `M' Print a memory reference for ld/st instructions.
4633 `R' Return appropriate cmp instruction for relational test.
4635 `T' Emit /{f,t,x}{f,t,x} for executing a true condition.
4636 `U' Print the upper half of a 64 bit item. */
4638 #define PRINT_OPERAND(STREAM, X, CODE) d30v_print_operand (STREAM, X, CODE)
4640 /* A C expression which evaluates to true if CODE is a valid punctuation
4641 character for use in the `PRINT_OPERAND' macro. If
4642 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
4643 characters (except for the standard one, `%') are used in this way. */
4645 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.' || (CODE) == ':')
4647 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4648 for an instruction operand that is a memory reference whose address is X. X
4649 is an RTL expression.
4651 On some machines, the syntax for a symbolic address depends on the section
4652 that the address refers to. On these machines, define the macro
4653 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
4654 then check for it here. *Note Assembler Format::. */
4656 #define PRINT_OPERAND_ADDRESS(STREAM, X) d30v_print_operand_address (STREAM, X)
4658 /* A C statement, to be executed after all slot-filler instructions have been
4659 output. If necessary, call `dbr_sequence_length' to determine the number of
4660 slots filled in a sequence (zero if not currently outputting a sequence), to
4661 decide how many no-ops to output, or whatever.
4663 Don't define this macro if it has nothing to do, but it is helpful in
4664 reading assembly output if the extent of the delay sequence is made explicit
4665 (e.g. with white space).
4667 Note that output routines for instructions with delay slots must be prepared
4668 to deal with not being output as part of a sequence (i.e. when the
4669 scheduling pass is not run, or when no slot fillers could be found.) The
4670 variable `final_sequence' is null when not processing a sequence, otherwise
4671 it contains the `sequence' rtx being output. */
4672 /* #define DBR_OUTPUT_SEQEND(FILE) */
4674 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
4675 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
4676 single `md' file must support multiple assembler formats. In that case, the
4677 various `tm.h' files can define these macros differently.
4679 USER_LABEL_PREFIX is defined in svr4.h. */
4681 #define REGISTER_PREFIX "%"
4682 #define LOCAL_LABEL_PREFIX "."
4683 #define USER_LABEL_PREFIX ""
4684 #define IMMEDIATE_PREFIX ""
4686 /* If your target supports multiple dialects of assembler language (such as
4687 different opcodes), define this macro as a C expression that gives the
4688 numeric index of the assembler language dialect to use, with zero as the
4691 If this macro is defined, you may use `{option0|option1|option2...}'
4692 constructs in the output templates of patterns (*note Output Template::.) or
4693 in the first argument of `asm_fprintf'. This construct outputs `option0',
4694 `option1' or `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero,
4695 one or two, etc. Any special characters within these strings retain their
4698 If you do not define this macro, the characters `{', `|' and `}' do not have
4699 any special meaning when used in templates or operands to `asm_fprintf'.
4701 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
4702 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations
4703 in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT'
4704 and use the `{option0|option1}' syntax if the syntax variant are larger and
4705 involve such things as different opcodes or operand order. */
4706 /* #define ASSEMBLER_DIALECT */
4708 /* A C expression to output to STREAM some assembler code which will push hard
4709 register number REGNO onto the stack. The code need not be optimal, since
4710 this macro is used only when profiling. */
4711 /* #define ASM_OUTPUT_REG_PUSH (STREAM, REGNO) */
4713 /* A C expression to output to STREAM some assembler code which will pop hard
4714 register number REGNO off of the stack. The code need not be optimal, since
4715 this macro is used only when profiling. */
4716 /* #define ASM_OUTPUT_REG_POP (STREAM, REGNO) */
4719 /* Output of dispatch tables. */
4721 /* This macro should be provided on machines where the addresses in a dispatch
4722 table are relative to the table's own address.
4724 The definition should be a C statement to output to the stdio stream STREAM
4725 an assembler pseudo-instruction to generate a difference between two labels.
4726 VALUE and REL are the numbers of two internal labels. The definitions of
4727 these labels are output using `ASM_OUTPUT_INTERNAL_LABEL', and they must be
4728 printed in the same way here. For example,
4730 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */
4732 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
4733 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
4735 /* This macro should be provided on machines where the addresses in a dispatch
4738 The definition should be a C statement to output to the stdio stream STREAM
4739 an assembler pseudo-instruction to generate a reference to a label. VALUE
4740 is the number of an internal label whose definition is output using
4741 `ASM_OUTPUT_INTERNAL_LABEL'. For example,
4743 fprintf (STREAM, "\t.word L%d\n", VALUE) */
4745 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
4746 fprintf (STREAM, "\t.word .L%d\n", VALUE)
4748 /* Define this if the label before a jump-table needs to be output specially.
4749 The first three arguments are the same as for `ASM_OUTPUT_INTERNAL_LABEL';
4750 the fourth argument is the jump-table which follows (a `jump_insn'
4751 containing an `addr_vec' or `addr_diff_vec').
4753 This feature is used on system V to output a `swbeg' statement for the
4756 If this macro is not defined, these labels are output with
4757 `ASM_OUTPUT_INTERNAL_LABEL'.
4759 Defined in svr4.h. */
4760 /* #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) */
4762 /* Define this if something special must be output at the end of a jump-table.
4763 The definition should be a C statement to be executed after the assembler
4764 code for the table is written. It should write the appropriate code to
4765 stdio stream STREAM. The argument TABLE is the jump-table insn, and NUM is
4766 the label-number of the preceding label.
4768 If this macro is not defined, nothing special is output at the end of the
4770 /* #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) */
4773 /* Assembler Commands for Exception Regions. */
4775 /* A C expression to output text to mark the start of an exception region.
4777 This macro need not be defined on most platforms. */
4778 /* #define ASM_OUTPUT_EH_REGION_BEG() */
4780 /* A C expression to output text to mark the end of an exception region.
4782 This macro need not be defined on most platforms. */
4783 /* #define ASM_OUTPUT_EH_REGION_END() */
4785 /* A C expression that is nonzero if the normal exception table output should
4788 This macro need not be defined on most platforms. */
4789 /* #define OMIT_EH_TABLE() */
4791 /* Alternate runtime support for looking up an exception at runtime and finding
4792 the associated handler, if the default method won't work.
4794 This macro need not be defined on most platforms. */
4795 /* #define EH_TABLE_LOOKUP() */
4797 /* A C expression that decides whether or not the current function needs to
4798 have a function unwinder generated for it. See the file `except.c' for
4799 details on when to define this, and how. */
4800 /* #define DOESNT_NEED_UNWINDER */
4802 /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it
4803 does not contain any extraneous set bits in it. */
4804 /* #define MASK_RETURN_ADDR */
4806 /* Define this macro to 0 if your target supports DWARF 2 frame unwind
4807 information, but it does not yet work with exception handling. Otherwise,
4808 if your target supports this information (if it defines
4809 `INCOMING_RETURN_ADDR_RTX' and either `UNALIGNED_INT_ASM_OP' or
4810 `OBJECT_FORMAT_ELF'), GCC will provide a default definition of 1.
4812 If this macro is defined to 1, the DWARF 2 unwinder will be the default
4813 exception handling mechanism; otherwise, setjmp/longjmp will be used by
4816 If this macro is defined to anything, the DWARF 2 unwinder will be used
4817 instead of inline unwinders and __unwind_function in the non-setjmp case. */
4818 /* #define DWARF2_UNWIND_INFO */
4821 /* Assembler Commands for Alignment. */
4823 /* The alignment (log base 2) to put in front of LABEL, which follows
4826 This macro need not be defined if you don't want any special alignment to be
4827 done at such a time. Most machine descriptions do not currently define the
4829 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
4831 /* The desired alignment for the location counter at the beginning
4834 This macro need not be defined if you don't want any special alignment to be
4835 done at such a time. Most machine descriptions do not currently define the
4837 /* #define LOOP_ALIGN(LABEL) */
4839 /* A C statement to output to the stdio stream STREAM an assembler instruction
4840 to advance the location counter by NBYTES bytes. Those bytes should be zero
4841 when loaded. NBYTES will be a C expression of type `int'.
4843 Defined in svr4.h. */
4844 /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
4845 fprintf (STREAM, "\t.zero\t%u\n", (NBYTES)) */
4847 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
4848 section because it fails put zeros in the bytes that are skipped. This is
4849 true on many Unix systems, where the pseudo-op to skip bytes produces no-op
4850 instructions rather than zeros when used in the text section. */
4851 /* #define ASM_NO_SKIP_IN_TEXT */
4853 /* A C statement to output to the stdio stream STREAM an assembler command to
4854 advance the location counter to a multiple of 2 to the POWER bytes. POWER
4855 will be a C expression of type `int'. */
4856 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
4857 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
4860 /* Macros Affecting all Debug Formats. */
4862 /* A C expression that returns the DBX register number for the compiler
4863 register number REGNO. In simple cases, the value of this expression may be
4864 REGNO itself. But sometimes there are some registers that the compiler
4865 knows about and DBX does not, or vice versa. In such cases, some register
4866 may need to have one number in the compiler and another for DBX.
4868 If two registers have consecutive numbers inside GNU CC, and they can be
4869 used as a pair to hold a multiword value, then they *must* have consecutive
4870 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers
4871 will be unable to access such a pair, because they expect register pairs to
4872 be consecutive in their own numbering scheme.
4874 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not
4875 preserve register pairs, then what you must do instead is redefine the
4876 actual register numbering scheme. */
4877 #define DBX_REGISTER_NUMBER(REGNO) \
4878 (GPR_P (REGNO) ? ((REGNO) - GPR_FIRST) \
4879 : ACCUM_P (REGNO) ? ((REGNO) - ACCUM_FIRST + 84) \
4880 : FLAG_P (REGNO) ? 66 /* return psw for all flags */ \
4881 : (REGNO) == ARG_POINTER_REGNUM ? (GPR_SP - GPR_FIRST) \
4882 : (REGNO) == CR_PSW ? (66 + 0) \
4883 : (REGNO) == CR_BPSW ? (66 + 1) \
4884 : (REGNO) == CR_PC ? (66 + 2) \
4885 : (REGNO) == CR_BPC ? (66 + 3) \
4886 : (REGNO) == CR_DPSW ? (66 + 4) \
4887 : (REGNO) == CR_DPC ? (66 + 5) \
4888 : (REGNO) == CR_RPT_C ? (66 + 7) \
4889 : (REGNO) == CR_RPT_S ? (66 + 8) \
4890 : (REGNO) == CR_RPT_E ? (66 + 9) \
4891 : (REGNO) == CR_MOD_S ? (66 + 10) \
4892 : (REGNO) == CR_MOD_E ? (66 + 11) \
4893 : (REGNO) == CR_IBA ? (66 + 14) \
4894 : (REGNO) == CR_EIT_VB ? (66 + 15) \
4895 : (REGNO) == CR_INT_S ? (66 + 16) \
4896 : (REGNO) == CR_INT_M ? (66 + 17) \
4899 /* A C expression that returns the integer offset value for an automatic
4900 variable having address X (an RTL expression). The default computation
4901 assumes that X is based on the frame-pointer and gives the offset from the
4902 frame-pointer. This is required for targets that produce debugging output
4903 for DBX or COFF-style debugging output for SDB and allow the frame-pointer
4904 to be eliminated when the `-g' options is used. */
4905 /* #define DEBUGGER_AUTO_OFFSET(X) */
4907 /* A C expression that returns the integer offset value for an argument having
4908 address X (an RTL expression). The nominal offset is OFFSET. */
4909 /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */
4911 /* A C expression that returns the type of debugging output GNU CC produces
4912 when the user specifies `-g' or `-ggdb'. Define this if you have arranged
4913 for GNU CC to support more than one format of debugging output. Currently,
4914 the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG',
4915 `DWARF2_DEBUG', and `XCOFF_DEBUG'.
4917 The value of this macro only affects the default debugging output; the user
4918 can always get a specific type of output by using `-gstabs', `-gcoff',
4919 `-gdwarf-1', `-gdwarf-2', or `-gxcoff'.
4921 Defined in svr4.h. */
4923 #undef PREFERRED_DEBUGGING_TYPE
4924 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
4927 /* Specific Options for DBX Output. */
4929 /* Define this macro if GNU CC should produce debugging output for DBX in
4930 response to the `-g' option.
4932 Defined in svr4.h. */
4933 /* #define DBX_DEBUGGING_INFO */
4935 /* Define this macro if GNU CC should produce XCOFF format debugging output in
4936 response to the `-g' option. This is a variant of DBX format. */
4937 /* #define XCOFF_DEBUGGING_INFO */
4939 /* Define this macro to control whether GNU CC should by default generate GDB's
4940 extended version of DBX debugging information (assuming DBX-format debugging
4941 information is enabled at all). If you don't define the macro, the default
4942 is 1: always generate the extended information if there is any occasion to. */
4943 /* #define DEFAULT_GDB_EXTENSIONS */
4945 /* Define this macro if all `.stabs' commands should be output while in the
4947 /* #define DEBUG_SYMS_TEXT */
4949 /* A C string constant naming the assembler pseudo op to use instead of
4950 `.stabs' to define an ordinary debugging symbol. If you don't define this
4951 macro, `.stabs' is used. This macro applies only to DBX debugging
4952 information format. */
4953 /* #define ASM_STABS_OP */
4955 /* A C string constant naming the assembler pseudo op to use instead of
4956 `.stabd' to define a debugging symbol whose value is the current location.
4957 If you don't define this macro, `.stabd' is used. This macro applies only
4958 to DBX debugging information format. */
4959 /* #define ASM_STABD_OP */
4961 /* A C string constant naming the assembler pseudo op to use instead of
4962 `.stabn' to define a debugging symbol with no name. If you don't define
4963 this macro, `.stabn' is used. This macro applies only to DBX debugging
4964 information format. */
4965 /* #define ASM_STABN_OP */
4967 /* Define this macro if DBX on your system does not support the construct
4968 `xsTAGNAME'. On some systems, this construct is used to describe a forward
4969 reference to a structure named TAGNAME. On other systems, this construct is
4970 not supported at all. */
4971 /* #define DBX_NO_XREFS */
4973 /* A symbol name in DBX-format debugging information is normally continued
4974 (split into two separate `.stabs' directives) when it exceeds a certain
4975 length (by default, 80 characters). On some operating systems, DBX requires
4976 this splitting; on others, splitting must not be done. You can inhibit
4977 splitting by defining this macro with the value zero. You can override the
4978 default splitting-length by defining this macro as an expression for the
4979 length you desire. */
4980 /* #define DBX_CONTIN_LENGTH */
4982 /* Normally continuation is indicated by adding a `\' character to the end of a
4983 `.stabs' string when a continuation follows. To use a different character
4984 instead, define this macro as a character constant for the character you
4985 want to use. Do not define this macro if backslash is correct for your
4987 /* #define DBX_CONTIN_CHAR */
4989 /* Define this macro if it is necessary to go to the data section before
4990 outputting the `.stabs' pseudo-op for a non-global static variable. */
4991 /* #define DBX_STATIC_STAB_DATA_SECTION */
4993 /* The value to use in the "code" field of the `.stabs' directive for a
4994 typedef. The default is `N_LSYM'. */
4995 /* #define DBX_TYPE_DECL_STABS_CODE */
4997 /* The value to use in the "code" field of the `.stabs' directive for a static
4998 variable located in the text section. DBX format does not provide any
4999 "right" way to do this. The default is `N_FUN'. */
5000 /* #define DBX_STATIC_CONST_VAR_CODE */
5002 /* The value to use in the "code" field of the `.stabs' directive for a
5003 parameter passed in registers. DBX format does not provide any "right" way
5004 to do this. The default is `N_RSYM'. */
5005 /* #define DBX_REGPARM_STABS_CODE */
5007 /* The letter to use in DBX symbol data to identify a symbol as a parameter
5008 passed in registers. DBX format does not customarily provide any way to do
5009 this. The default is `'P''. */
5010 /* #define DBX_REGPARM_STABS_LETTER */
5012 /* The letter to use in DBX symbol data to identify a symbol as a stack
5013 parameter. The default is `'p''. */
5014 /* #define DBX_MEMPARM_STABS_LETTER */
5016 /* Define this macro if the DBX information for a function and its arguments
5017 should precede the assembler code for the function. Normally, in DBX
5018 format, the debugging information entirely follows the assembler code.
5020 Defined in svr4.h. */
5021 /* #define DBX_FUNCTION_FIRST */
5023 /* Define this macro if the `N_LBRAC' symbol for a block should precede the
5024 debugging information for variables and functions defined in that block.
5025 Normally, in DBX format, the `N_LBRAC' symbol comes first. */
5026 /* #define DBX_LBRAC_FIRST */
5028 /* Define this macro if the value of a symbol describing the scope of a block
5029 (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing
5030 function. Normally, GNU C uses an absolute address.
5032 Defined in svr4.h. */
5033 /* #define DBX_BLOCKS_FUNCTION_RELATIVE */
5035 /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL'
5036 stabs for included header files, as on Sun systems. This macro
5037 also directs GNU C to output a type number as a pair of a file
5038 number and a type number within the file. Normally, GNU C does not
5039 generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single
5040 number for a type number. */
5041 /* #define DBX_USE_BINCL */
5044 /* Open ended Hooks for DBX Output. */
5046 /* Define this macro to say how to output to STREAM the debugging information
5047 for the start of a scope level for variable names. The argument NAME is the
5048 name of an assembler symbol (for use with `assemble_name') whose value is
5049 the address where the scope begins. */
5050 /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */
5052 /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */
5053 /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */
5055 /* Define this macro if the target machine requires special handling to output
5056 an enumeration type. The definition should be a C statement (sans
5057 semicolon) to output the appropriate information to STREAM for the type
5059 /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */
5061 /* Define this macro if the target machine requires special output at the end
5062 of the debugging information for a function. The definition should be a C
5063 statement (sans semicolon) to output the appropriate information to STREAM.
5064 FUNCTION is the `FUNCTION_DECL' node for the function. */
5065 /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */
5067 /* Define this macro if you need to control the order of output of the standard
5068 data types at the beginning of compilation. The argument SYMS is a `tree'
5069 which is a chain of all the predefined global symbols, including names of
5072 Normally, DBX output starts with definitions of the types for integers and
5073 characters, followed by all the other predefined types of the particular
5074 language in no particular order.
5076 On some machines, it is necessary to output different particular types
5077 first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those
5078 symbols in the necessary order. Any predefined types that you don't
5079 explicitly output will be output afterward in no particular order.
5081 Be careful not to define this macro so that it works only for C. There are
5082 no global variables to access most of the built-in types, because another
5083 language may have another set of types. The way to output a particular type
5084 is to look through SYMS to see if you can find it. Here is an example:
5088 for (decl = syms; decl; decl = TREE_CHAIN (decl))
5089 if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
5091 dbxout_symbol (decl);
5095 This does nothing if the expected type does not exist.
5097 See the function `init_decl_processing' in `c-decl.c' to find the names to
5098 use for all the built-in C types. */
5099 /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */
5101 /* Some stabs encapsulation formats (in particular ECOFF), cannot
5102 handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx
5103 extension construct. On those machines, define this macro to turn
5104 this feature off without disturbing the rest of the gdb extensions. */
5105 /* #define NO_DBX_FUNCTION_END */
5108 /* File names in DBX format. */
5110 /* Define this if DBX wants to have the current directory recorded in each
5113 Note that the working directory is always recorded if GDB extensions are
5115 /* #define DBX_WORKING_DIRECTORY */
5117 /* A C statement to output DBX debugging information to the stdio stream STREAM
5118 which indicates that file NAME is the main source file--the file specified
5119 as the input file for compilation. This macro is called only once, at the
5120 beginning of compilation.
5122 This macro need not be defined if the standard form of output for DBX
5123 debugging information is appropriate.
5125 Defined in svr4.h. */
5126 /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */
5128 /* A C statement to output DBX debugging information to the stdio stream STREAM
5129 which indicates that the current directory during compilation is named NAME.
5131 This macro need not be defined if the standard form of output for DBX
5132 debugging information is appropriate. */
5133 /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */
5135 /* A C statement to output DBX debugging information at the end of compilation
5136 of the main source file NAME.
5138 If you don't define this macro, nothing special is output at the end of
5139 compilation, which is correct for most machines. */
5140 /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */
5142 /* A C statement to output DBX debugging information to the stdio stream STREAM
5143 which indicates that file NAME is the current source file. This output is
5144 generated each time input shifts to a different source file as a result of
5145 `#include', the end of an included file, or a `#line' command.
5147 This macro need not be defined if the standard form of output for DBX
5148 debugging information is appropriate. */
5149 /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
5152 /* Macros for SDB and Dwarf Output. */
5154 /* Define this macro if GNU CC should produce COFF-style debugging output for
5155 SDB in response to the `-g' option. */
5156 /* #define SDB_DEBUGGING_INFO */
5158 /* Define this macro if GNU CC should produce dwarf format debugging output in
5159 response to the `-g' option.
5161 Defined in svr4.h. */
5162 /* #define DWARF_DEBUGGING_INFO */
5164 /* Define this macro if GNU CC should produce dwarf version 2 format debugging
5165 output in response to the `-g' option.
5167 To support optional call frame debugging information, you must also define
5168 `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the
5169 prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa'
5170 and `dwarf2out_reg_save' as appropriate from output_function_prologue() if
5173 Defined in svr4.h. */
5174 /* #define DWARF2_DEBUGGING_INFO */
5176 /* Define these macros to override the assembler syntax for the special SDB
5177 assembler directives. See `sdbout.c' for a list of these macros and their
5178 arguments. If the standard syntax is used, you need not define them
5180 /* #define PUT_SDB_... */
5182 /* Some assemblers do not support a semicolon as a delimiter, even between SDB
5183 assembler directives. In that case, define this macro to be the delimiter
5184 to use (usually `\n'). It is not necessary to define a new set of
5185 `PUT_SDB_OP' macros if this is the only change required. */
5186 /* #define SDB_DELIM */
5188 /* Define this macro to override the usual method of constructing a dummy name
5189 for anonymous structure and union types. See `sdbout.c' for more
5191 /* #define SDB_GENERATE_FAKE */
5193 /* Define this macro to allow references to unknown structure, union, or
5194 enumeration tags to be emitted. Standard COFF does not allow handling of
5195 unknown references, MIPS ECOFF has support for it. */
5196 /* #define SDB_ALLOW_UNKNOWN_REFERENCES */
5198 /* Define this macro to allow references to structure, union, or enumeration
5199 tags that have not yet been seen to be handled. Some assemblers choke if
5200 forward tags are used, while some require it. */
5201 /* #define SDB_ALLOW_FORWARD_REFERENCES */
5204 /* Cross Compilation and Floating Point. */
5206 /* While all modern machines use 2's complement representation for integers,
5207 there are a variety of representations for floating point numbers. This
5208 means that in a cross-compiler the representation of floating point numbers
5209 in the compiled program may be different from that used in the machine doing
5212 Because different representation systems may offer different amounts of
5213 range and precision, the cross compiler cannot safely use the host machine's
5214 floating point arithmetic. Therefore, floating point constants must be
5215 represented in the target machine's format. This means that the cross
5216 compiler cannot use `atof' to parse a floating point constant; it must have
5217 its own special routine to use instead. Also, constant folding must emulate
5218 the target machine's arithmetic (or must not be done at all).
5220 The macros in the following table should be defined only if you are cross
5221 compiling between different floating point formats.
5223 Otherwise, don't define them. Then default definitions will be set up which
5224 use `double' as the data type, `==' to test for equality, etc.
5226 You don't need to worry about how many times you use an operand of any of
5227 these macros. The compiler never uses operands which have side effects. */
5229 /* A macro for the C data type to be used to hold a floating point value in the
5230 target machine's format. Typically this would be a `struct' containing an
5232 /* #define REAL_VALUE_TYPE */
5234 /* A macro for a C expression which compares for equality the two values, X and
5235 Y, both of type `REAL_VALUE_TYPE'. */
5236 /* #define REAL_VALUES_EQUAL(X, Y) */
5238 /* A macro for a C expression which tests whether X is less than Y, both values
5239 being of type `REAL_VALUE_TYPE' and interpreted as floating point numbers in
5240 the target machine's representation. */
5241 /* #define REAL_VALUES_LESS(X, Y) */
5243 /* A macro for a C expression which performs the standard library function
5244 `ldexp', but using the target machine's floating point representation. Both
5245 X and the value of the expression have type `REAL_VALUE_TYPE'. The second
5246 argument, SCALE, is an integer. */
5247 /* #define REAL_VALUE_LDEXP(X, SCALE) */
5249 /* A macro whose definition is a C expression to convert the target-machine
5250 floating point value X to a signed integer. X has type `REAL_VALUE_TYPE'. */
5251 /* #define REAL_VALUE_FIX(X) */
5253 /* A macro whose definition is a C expression to convert the target-machine
5254 floating point value X to an unsigned integer. X has type
5255 `REAL_VALUE_TYPE'. */
5256 /* #define REAL_VALUE_UNSIGNED_FIX(X) */
5258 /* A macro whose definition is a C expression to round the target-machine
5259 floating point value X towards zero to an integer value (but still as a
5260 floating point number). X has type `REAL_VALUE_TYPE', and so does the
5262 /* #define REAL_VALUE_RNDZINT(X) */
5264 /* A macro whose definition is a C expression to round the target-machine
5265 floating point value X towards zero to an unsigned integer value (but still
5266 represented as a floating point number). X has type `REAL_VALUE_TYPE', and
5267 so does the value. */
5268 /* #define REAL_VALUE_UNSIGNED_RNDZINT(X) */
5270 /* A macro for a C expression which converts STRING, an expression of type
5271 `char *', into a floating point number in the target machine's
5272 representation for mode MODE. The value has type `REAL_VALUE_TYPE'. */
5273 /* #define REAL_VALUE_ATOF(STRING, MODE) */
5275 /* Define this macro if infinity is a possible floating point value, and
5276 therefore division by 0 is legitimate. */
5277 /* #define REAL_INFINITY */
5279 /* A macro for a C expression which determines whether X, a floating point
5280 value, is infinity. The value has type `int'. By default, this is defined
5282 /* #define REAL_VALUE_ISINF(X) */
5284 /* A macro for a C expression which determines whether X, a floating point
5285 value, is a "nan" (not-a-number). The value has type `int'. By default,
5286 this is defined to call `isnan'. */
5287 /* #define REAL_VALUE_ISNAN(X) */
5289 /* Define the following additional macros if you want to make floating point
5290 constant folding work while cross compiling. If you don't define them,
5291 cross compilation is still possible, but constant folding will not happen
5292 for floating point values. */
5294 /* A macro for a C statement which calculates an arithmetic operation of the
5295 two floating point values X and Y, both of type `REAL_VALUE_TYPE' in the
5296 target machine's representation, to produce a result of the same type and
5297 representation which is stored in OUTPUT (which will be a variable).
5299 The operation to be performed is specified by CODE, a tree code which will
5300 always be one of the following: `PLUS_EXPR', `MINUS_EXPR', `MULT_EXPR',
5301 `RDIV_EXPR', `MAX_EXPR', `MIN_EXPR'.
5303 The expansion of this macro is responsible for checking for overflow. If
5304 overflow happens, the macro expansion should execute the statement `return
5305 0;', which indicates the inability to perform the arithmetic operation
5307 /* #define REAL_ARITHMETIC(OUTPUT, CODE, X, Y) */
5309 /* The real.h file actually defines REAL_ARITHMETIC appropriately if it was
5310 defined at all before entering into the code, by using #undef first. */
5311 #define REAL_ARITHMETIC
5313 /* A macro for a C expression which returns the negative of the floating point
5314 value X. Both X and the value of the expression have type `REAL_VALUE_TYPE'
5315 and are in the target machine's floating point representation.
5317 There is no way for this macro to report overflow, since overflow can't
5318 happen in the negation operation. */
5319 /* #define REAL_VALUE_NEGATE(X) */
5321 /* A macro for a C expression which converts the floating point value X to mode
5324 Both X and the value of the expression are in the target machine's floating
5325 point representation and have type `REAL_VALUE_TYPE'. However, the value
5326 should have an appropriate bit pattern to be output properly as a floating
5327 constant whose precision accords with mode MODE.
5329 There is no way for this macro to report overflow. */
5330 /* #define REAL_VALUE_TRUNCATE(MODE, X) */
5332 /* A macro for a C expression which converts a floating point value X into a
5333 double-precision integer which is then stored into LOW and HIGH, two
5334 variables of type INT. */
5335 /* #define REAL_VALUE_TO_INT(LOW, HIGH, X) */
5337 /* A macro for a C expression which converts a double-precision integer found
5338 in LOW and HIGH, two variables of type INT, into a floating point value
5339 which is then stored into X. */
5340 /* #define REAL_VALUE_FROM_INT(X, LOW, HIGH) */
5343 /* Miscellaneous Parameters. */
5345 /* Define this if you have defined special-purpose predicates in the file
5346 `MACHINE.c'. This macro is called within an initializer of an array of
5347 structures. The first field in the structure is the name of a predicate and
5348 the second field is an array of rtl codes. For each predicate, list all rtl
5349 codes that can be in expressions matched by the predicate. The list should
5350 have a trailing comma. Here is an example of two entries in the list for a
5351 typical RISC machine:
5353 #define PREDICATE_CODES \
5354 {"gen_reg_rtx_operand", {SUBREG, REG}}, \
5355 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
5357 Defining this macro does not affect the generated code (however, incorrect
5358 definitions that omit an rtl code that may be matched by the predicate can
5359 cause the compiler to malfunction). Instead, it allows the table built by
5360 `genrecog' to be more compact and efficient, thus speeding up the compiler.
5361 The most important predicates to include in the list specified by this macro
5362 are thoses used in the most insn patterns. */
5364 #define PREDICATE_CODES \
5365 { "short_memory_operand", { MEM }}, \
5366 { "long_memory_operand", { MEM }}, \
5367 { "d30v_memory_operand", { MEM }}, \
5368 { "single_reg_memory_operand", { MEM }}, \
5369 { "const_addr_memory_operand", { MEM }}, \
5370 { "call_operand", { MEM }}, \
5371 { "gpr_operand", { REG, SUBREG }}, \
5372 { "accum_operand", { REG, SUBREG }}, \
5373 { "gpr_or_accum_operand", { REG, SUBREG }}, \
5374 { "cr_operand", { REG, SUBREG }}, \
5375 { "repeat_operand", { REG, SUBREG }}, \
5376 { "flag_operand", { REG, SUBREG }}, \
5377 { "br_flag_operand", { REG, SUBREG }}, \
5378 { "br_flag_or_constant_operand", { REG, SUBREG, CONST_INT }}, \
5379 { "gpr_or_br_flag_operand", { REG, SUBREG }}, \
5380 { "f0_operand", { REG, SUBREG }}, \
5381 { "f1_operand", { REG, SUBREG }}, \
5382 { "carry_operand", { REG, SUBREG }}, \
5383 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, \
5385 { "gpr_or_signed6_operand", { REG, SUBREG, CONST_INT }}, \
5386 { "gpr_or_unsigned5_operand", { REG, SUBREG, CONST_INT }}, \
5387 { "gpr_or_unsigned6_operand", { REG, SUBREG, CONST_INT }}, \
5388 { "gpr_or_constant_operand", { REG, SUBREG, CONST_INT, \
5389 CONST, SYMBOL_REF, \
5391 { "gpr_or_dbl_const_operand", { REG, SUBREG, CONST_INT, \
5392 CONST, SYMBOL_REF, \
5393 LABEL_REF, CONST_DOUBLE }}, \
5394 { "gpr_or_memory_operand", { REG, SUBREG, MEM }}, \
5395 { "move_input_operand", { REG, SUBREG, MEM, CONST_INT, \
5396 CONST, SYMBOL_REF, \
5397 LABEL_REF, CONST_DOUBLE }}, \
5398 { "move_output_operand", { REG, SUBREG, MEM }}, \
5399 { "signed6_operand", { CONST_INT }}, \
5400 { "unsigned5_operand", { CONST_INT }}, \
5401 { "unsigned6_operand", { CONST_INT }}, \
5402 { "bitset_operand", { CONST_INT }}, \
5403 { "condexec_test_operator", { EQ, NE }}, \
5404 { "condexec_branch_operator", { EQ, NE }}, \
5405 { "condexec_unary_operator", { ABS, NEG, NOT, ZERO_EXTEND }}, \
5406 { "condexec_addsub_operator", { PLUS, MINUS }}, \
5407 { "condexec_binary_operator", { MULT, AND, IOR, XOR, \
5408 ASHIFT, ASHIFTRT, LSHIFTRT, \
5409 ROTATE, ROTATERT }}, \
5410 { "condexec_shiftl_operator", { ASHIFT, ROTATE }}, \
5411 { "condexec_extend_operator", { SIGN_EXTEND, ZERO_EXTEND }}, \
5412 { "branch_zero_operator", { EQ, NE }}, \
5413 { "cond_move_dest_operand", { REG, SUBREG, MEM }}, \
5414 { "cond_move_operand", { REG, SUBREG, CONST_INT, \
5415 CONST, SYMBOL_REF, \
5416 LABEL_REF, MEM }}, \
5417 { "cond_exec_operand", { REG, SUBREG, CONST_INT, \
5418 CONST, SYMBOL_REF, \
5419 LABEL_REF, MEM }}, \
5420 { "srelational_si_operator", { EQ, NE, LT, LE, GT, GE }}, \
5421 { "urelational_si_operator", { LTU, LEU, GTU, GEU }}, \
5422 { "relational_di_operator", { EQ, NE, LT, LE, GT, GE, \
5423 LTU, LEU, GTU, GEU }},
5425 /* An alias for a machine mode name. This is the machine mode that elements of
5426 a jump-table should have. */
5427 #define CASE_VECTOR_MODE SImode
5429 /* Define as C expression which evaluates to nonzero if the tablejump
5430 instruction expects the table to contain offsets from the address of the
5432 Do not define this if the table should contain absolute addresses. */
5433 /* #define CASE_VECTOR_PC_RELATIVE 1 */
5435 /* Define this if control falls through a `case' insn when the index value is
5436 out of range. This means the specified default-label is actually ignored by
5437 the `case' insn proper. */
5438 /* #define CASE_DROPS_THROUGH */
5440 /* Define this to be the smallest number of different values for which it is
5441 best to use a jump-table instead of a tree of conditional branches. The
5442 default is four for machines with a `casesi' instruction and five otherwise.
5443 This is best for most machines. */
5444 /* #define CASE_VALUES_THRESHOLD */
5446 /* Define this macro if operations between registers with integral mode smaller
5447 than a word are always performed on the entire register. Most RISC machines
5448 have this property and most CISC machines do not. */
5449 #define WORD_REGISTER_OPERATIONS 1
5451 /* Define this macro to be a C expression indicating when insns that read
5452 memory in MODE, an integral mode narrower than a word, set the bits outside
5453 of MODE to be either the sign-extension or the zero-extension of the data
5454 read. Return `SIGN_EXTEND' for values of MODE for which the insn
5455 sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other
5458 This macro is not called with MODE non-integral or with a width greater than
5459 or equal to `BITS_PER_WORD', so you may return any value in this case. Do
5460 not define this macro if it would always return `NIL'. On machines where
5461 this macro is defined, you will normally define it as the constant
5462 `SIGN_EXTEND' or `ZERO_EXTEND'. */
5464 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
5466 /* Define if loading short immediate values into registers sign extends. */
5467 #define SHORT_IMMEDIATES_SIGN_EXTEND
5469 /* An alias for a tree code that should be used by default for conversion of
5470 floating point values to fixed point. Normally, `FIX_ROUND_EXPR' is used. */
5471 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
5473 /* Define this macro if the same instructions that convert a floating point
5474 number to a signed fixed point number also convert validly to an unsigned
5476 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
5478 /* An alias for a tree code that is the easiest kind of division to compile
5479 code for in the general case. It may be `TRUNC_DIV_EXPR', `FLOOR_DIV_EXPR',
5480 `CEIL_DIV_EXPR' or `ROUND_DIV_EXPR'. These four division operators differ
5481 in how they round the result to an integer. `EASY_DIV_EXPR' is used when it
5482 is permissible to use any of those kinds of division and the choice should
5483 be made on the basis of efficiency. */
5484 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
5486 /* The maximum number of bytes that a single instruction can move quickly from
5487 memory to memory. */
5490 /* The maximum number of bytes that a single instruction can move quickly from
5491 memory to memory. If this is undefined, the default is `MOVE_MAX'.
5492 Otherwise, it is the constant value that is the largest value that
5493 `MOVE_MAX' can have at run-time. */
5494 /* #define MAX_MOVE_MAX */
5496 /* A C expression that is nonzero if on this machine the number of bits
5497 actually used for the count of a shift operation is equal to the number of
5498 bits needed to represent the size of the object being shifted. When this
5499 macro is non-zero, the compiler will assume that it is safe to omit a
5500 sign-extend, zero-extend, and certain bitwise `and' instructions that
5501 truncates the count of a shift operation. On machines that have
5502 instructions that act on bitfields at variable positions, which may include
5503 `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables
5504 deletion of truncations of the values that serve as arguments to bitfield
5507 If both types of instructions truncate the count (for shifts) and position
5508 (for bitfield operations), or if no variable-position bitfield instructions
5509 exist, you should define this macro.
5511 However, on some machines, such as the 80386 and the 680x0, truncation only
5512 applies to shift operations and not the (real or pretended) bitfield
5513 operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines.
5514 Instead, add patterns to the `md' file that include the implied truncation
5515 of the shift instructions.
5517 You need not define this macro if it would always have the value of zero. */
5518 /* #define SHIFT_COUNT_TRUNCATED */
5520 /* A C expression which is nonzero if on this machine it is safe to "convert"
5521 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
5522 than INPREC) by merely operating on it as if it had only OUTPREC bits.
5524 On many machines, this expression can be 1.
5526 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
5527 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
5528 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
5530 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
5532 /* A C expression describing the value returned by a comparison operator with
5533 an integral mode and stored by a store-flag instruction (`sCOND') when the
5534 condition is true. This description must apply to *all* the `sCOND'
5535 patterns and all the comparison operators whose results have a `MODE_INT'
5538 A value of 1 or -1 means that the instruction implementing the comparison
5539 operator returns exactly 1 or -1 when the comparison is true and 0 when the
5540 comparison is false. Otherwise, the value indicates which bits of the
5541 result are guaranteed to be 1 when the comparison is true. This value is
5542 interpreted in the mode of the comparison operation, which is given by the
5543 mode of the first operand in the `sCOND' pattern. Either the low bit or the
5544 sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used
5547 If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code
5548 that depends only on the specified bits. It can also replace comparison
5549 operators with equivalent operations if they cause the required bits to be
5550 set, even if the remaining bits are undefined. For example, on a machine
5551 whose comparison operators return an `SImode' value and where
5552 `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit
5553 is relevant, the expression
5555 (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0))
5559 (ashift:SI X (const_int N))
5561 where N is the appropriate shift count to move the bit being tested into the
5564 There is no way to describe a machine that always sets the low-order bit for
5565 a true value, but does not guarantee the value of any other bits, but we do
5566 not know of any machine that has such an instruction. If you are trying to
5567 port GNU CC to such a machine, include an instruction to perform a
5568 logical-and of the result with 1 in the pattern for the comparison operators
5569 and let us know (*note How to Report Bugs: Bug Reporting.).
5571 Often, a machine will have multiple instructions that obtain a value from a
5572 comparison (or the condition codes). Here are rules to guide the choice of
5573 value for `STORE_FLAG_VALUE', and hence the instructions to be used:
5575 * Use the shortest sequence that yields a valid definition for
5576 `STORE_FLAG_VALUE'. It is more efficient for the compiler to
5577 "normalize" the value (convert it to, e.g., 1 or 0) than for
5578 the comparison operators to do so because there may be
5579 opportunities to combine the normalization with other
5582 * For equal-length sequences, use a value of 1 or -1, with -1
5583 being slightly preferred on machines with expensive jumps and
5584 1 preferred on other machines.
5586 * As a second choice, choose a value of `0x80000001' if
5587 instructions exist that set both the sign and low-order bits
5588 but do not define the others.
5590 * Otherwise, use a value of `0x80000000'.
5592 Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and
5593 its negation in the same number of instructions. On those machines, you
5594 should also define a pattern for those cases, e.g., one matching
5596 (set A (neg:M (ne:M B C)))
5598 Some machines can also perform `and' or `plus' operations on condition code
5599 values with less instructions than the corresponding `sCOND' insn followed
5600 by `and' or `plus'. On those machines, define the appropriate patterns.
5601 Use the names `incscc' and `decscc', respectively, for the the patterns
5602 which perform `plus' or `minus' operations on condition code values. See
5603 `rs6000.md' for some examples. The GNU Superoptizer can be used to find
5604 such instruction sequences on other machines.
5606 You need not define `STORE_FLAG_VALUE' if the machine has no store-flag
5608 /* #define STORE_FLAG_VALUE */
5610 /* A C expression that gives a non-zero floating point value that is returned
5611 when comparison operators with floating-point results are true. Define this
5612 macro on machine that have comparison operations that return floating-point
5613 values. If there are no such operations, do not define this macro. */
5614 /* #define FLOAT_STORE_FLAG_VALUE */
5616 /* An alias for the machine mode for pointers. On most machines, define this
5617 to be the integer mode corresponding to the width of a hardware pointer;
5618 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
5619 you must define this to be one of the partial integer modes, such as
5622 The width of `Pmode' must be at least as large as the value of
5623 `POINTER_SIZE'. If it is not equal, you must define the macro
5624 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
5625 #define Pmode SImode
5627 /* An alias for the machine mode used for memory references to functions being
5628 called, in `call' RTL expressions. On most machines this should be
5630 #define FUNCTION_MODE QImode
5632 /* A C expression for the maximum number of instructions above which the
5633 function DECL should not be inlined. DECL is a `FUNCTION_DECL' node.
5635 The default definition of this macro is 64 plus 8 times the number of
5636 arguments that the function accepts. Some people think a larger threshold
5637 should be used on RISC machines. */
5638 /* #define INTEGRATE_THRESHOLD(DECL) */
5640 /* Define this if the preprocessor should ignore `#sccs' directives and print
5643 Defined in svr4.h. */
5644 /* #define SCCS_DIRECTIVE */
5646 /* Define this macro if the system header files support C++ as well as C. This
5647 macro inhibits the usual method of using system header files in C++, which
5648 is to pretend that the file's contents are enclosed in `extern "C" {...}'. */
5649 /* #define NO_IMPLICIT_EXTERN_C */
5651 /* Define this macro to handle System V style pragmas (particularly #pack).
5653 Defined in svr4.h. */
5654 #define HANDLE_SYSV_PRAGMA
5656 /* Define this macro if you want to handle #pragma weak (HANDLE_SYSV_PRAGMA
5657 must also be defined). */
5658 /* #define HANDLE_WEAK_PRAGMA */
5660 /* Define this macro to control use of the character `$' in identifier names.
5661 The value should be 0, 1, or 2. 0 means `$' is not allowed by default; 1
5662 means it is allowed by default if `-traditional' is used; 2 means it is
5663 allowed by default provided `-ansi' is not used. 1 is the default; there is
5664 no need to define this macro in that case. */
5665 /* #define DOLLARS_IN_IDENTIFIERS */
5667 /* Define this macro if the assembler does not accept the character `$' in
5668 label names. By default constructors and destructors in G++ have `$' in the
5669 identifiers. If this macro is defined, `.' is used instead.
5671 Defined in svr4.h. */
5672 /* #define NO_DOLLAR_IN_LABEL */
5674 /* Define this macro if the assembler does not accept the character `.' in
5675 label names. By default constructors and destructors in G++ have names that
5676 use `.'. If this macro is defined, these names are rewritten to avoid `.'. */
5677 /* #define NO_DOT_IN_LABEL */
5679 /* Define this macro if the target system expects every program's `main'
5680 function to return a standard "success" value by default (if no other value
5681 is explicitly returned).
5683 The definition should be a C statement (sans semicolon) to generate the
5684 appropriate rtl instructions. It is used only when compiling the end of
5686 /* #define DEFAULT_MAIN_RETURN */
5688 /* Define this if your `exit' function needs to do something besides calling an
5689 external function `_cleanup' before terminating with `_exit'. The
5690 `EXIT_BODY' macro is only needed if `NEED_ATEXIT' is defined and
5691 `ON_EXIT' is not defined. */
5692 /* #define EXIT_BODY */
5694 /* Define this macro as a C expression that is nonzero if it is safe for the
5695 delay slot scheduler to place instructions in the delay slot of INSN, even
5696 if they appear to use a resource set or clobbered in INSN. INSN is always a
5697 `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this
5698 behavior. On machines where some `insn' or `jump_insn' is really a function
5699 call and hence has this behavior, you should define this macro.
5701 You need not define this macro if it would always return zero. */
5702 /* #define INSN_SETS_ARE_DELAYED(INSN) */
5704 /* Define this macro as a C expression that is nonzero if it is safe for the
5705 delay slot scheduler to place instructions in the delay slot of INSN, even
5706 if they appear to set or clobber a resource referenced in INSN. INSN is
5707 always a `jump_insn' or an `insn'. On machines where some `insn' or
5708 `jump_insn' is really a function call and its operands are registers whose
5709 use is actually in the subroutine it calls, you should define this macro.
5710 Doing so allows the delay slot scheduler to move instructions which copy
5711 arguments into the argument registers into the delay slot of INSN.
5713 You need not define this macro if it would always return zero. */
5714 /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */
5716 /* In rare cases, correct code generation requires extra machine dependent
5717 processing between the second jump optimization pass and delayed branch
5718 scheduling. On those machines, define this macro as a C statement to act on
5719 the code starting at INSN. */
5720 #define MACHINE_DEPENDENT_REORG(INSN) d30v_machine_dependent_reorg (INSN)
5722 /* Define this macro if in some cases global symbols from one translation unit
5723 may not be bound to undefined symbols in another translation unit without
5724 user intervention. For instance, under Microsoft Windows symbols must be
5725 explicitly imported from shared libraries (DLLs). */
5726 /* #define MULTIPLE_SYMBOL_SPACES */
5728 /* A C expression for the maximum number of instructions to execute via
5729 conditional execution instructions instead of a branch. A value of
5730 BRANCH_COST+1 is the default if the machine does not use cc0, and 1 if it
5732 #define MAX_CONDITIONAL_EXECUTE d30v_cond_exec
5734 #define D30V_DEFAULT_MAX_CONDITIONAL_EXECUTE 4
5736 /* Values of the -mcond-exec=n string. */
5737 extern int d30v_cond_exec;
5738 extern const char *d30v_cond_exec_string;
5740 #endif /* GCC_D30V_H */
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