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 /* Set up System V.4 (aka ELF) defaults. */
35 /* Driver configuration */
37 /* A C expression which determines whether the option `-CHAR' takes arguments.
38 The value should be the number of arguments that option takes-zero, for many
41 By default, this macro is defined to handle the standard options properly.
42 You need not define it unless you wish to add additional options which take
46 /* #define SWITCH_TAKES_ARG(CHAR) */
48 /* A C expression which determines whether the option `-NAME' takes arguments.
49 The value should be the number of arguments that option takes-zero, for many
50 options. This macro rather than `SWITCH_TAKES_ARG' is used for
51 multi-character option names.
53 By default, this macro is defined as `DEFAULT_WORD_SWITCH_TAKES_ARG', which
54 handles the standard options properly. You need not define
55 `WORD_SWITCH_TAKES_ARG' unless you wish to add additional options which take
56 arguments. Any redefinition should call `DEFAULT_WORD_SWITCH_TAKES_ARG' and
57 then check for additional options.
60 /* #define WORD_SWITCH_TAKES_ARG(NAME) */
62 /* A string-valued C expression which is nonempty if the linker needs a space
63 between the `-L' or `-o' option and its argument.
65 If this macro is not defined, the default value is 0. */
66 /* #define SWITCHES_NEED_SPACES "" */
68 /* A C string constant that tells the GNU CC driver program options to pass to
69 CPP. It can also specify how to translate options you give to GNU CC into
70 options for GNU CC to pass to the CPP.
72 Do not define this macro if it does not need to do anything. */
73 /* #define CPP_SPEC "" */
75 /* If this macro is defined, the preprocessor will not define the builtin macro
76 `__SIZE_TYPE__'. The macro `__SIZE_TYPE__' must then be defined by
79 This should be defined if `SIZE_TYPE' depends on target dependent flags
80 which are not accessible to the preprocessor. Otherwise, it should not be
82 /* #define NO_BUILTIN_SIZE_TYPE */
84 /* If this macro is defined, the preprocessor will not define the builtin macro
85 `__PTRDIFF_TYPE__'. The macro `__PTRDIFF_TYPE__' must then be defined by
88 This should be defined if `PTRDIFF_TYPE' depends on target dependent flags
89 which are not accessible to the preprocessor. Otherwise, it should not be
91 /* #define NO_BUILTIN_PTRDIFF_TYPE */
93 /* A C string constant that tells the GNU CC driver program options to pass to
94 CPP. By default, this macro is defined to pass the option
95 `-D__CHAR_UNSIGNED__' to CPP if `char' will be treated as `unsigned char' by
98 Do not define this macro unless you need to override the default definition. */
99 /* #if DEFAULT_SIGNED_CHAR
100 #define SIGNED_CHAR_SPEC "%{funsigned-char:-D__CHAR_UNSIGNED__}"
102 #define SIGNED_CHAR_SPEC "%{!fsigned-char:-D__CHAR_UNSIGNED__}"
105 /* A C string constant that tells the GNU CC driver program options to pass to
106 `cc1'. It can also specify how to translate options you give to GNU CC into
107 options for GNU CC to pass to the `cc1'.
109 Do not define this macro if it does not need to do anything. */
110 /* #define CC1_SPEC "" */
112 /* A C string constant that tells the GNU CC driver program options to pass to
113 `cc1plus'. It can also specify how to translate options you give to GNU CC
114 into options for GNU CC to pass to the `cc1plus'.
116 Do not define this macro if it does not need to do anything. */
117 /* #define CC1PLUS_SPEC "" */
119 /* A C string constant that tells the GNU CC driver program options to pass to
120 the assembler. It can also specify how to translate options you give to GNU
121 CC into options for GNU CC to pass to the assembler. See the file `sun3.h'
122 for an example of this.
124 Do not define this macro if it does not need to do anything.
126 Defined in svr4.h. */
129 %{!mno-asm-optimize: %{O*: %{!O0: -O} %{O0: %{masm-optimize: -O}}}} \
130 %{v} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
132 /* A C string constant that tells the GNU CC driver program how to run any
133 programs which cleanup after the normal assembler. Normally, this is not
134 needed. See the file `mips.h' for an example of this.
136 Do not define this macro if it does not need to do anything.
138 Defined in svr4.h. */
139 /* #define ASM_FINAL_SPEC "" */
141 /* A C string constant that tells the GNU CC driver program options to pass to
142 the linker. It can also specify how to translate options you give to GNU CC
143 into options for GNU CC to pass to the linker.
145 Do not define this macro if it does not need to do anything.
147 Defined in svr4.h. */
152 %{static:-dn -Bstatic} \
153 %{shared:-G -dy -z text} \
154 %{symbolic:-Bsymbolic -G -dy -z text} \
158 %{mextmem: -m d30v_e} %{mextmemory: -m d30v_e} %{monchip: -m d30v_o}"
160 /* Another C string constant used much like `LINK_SPEC'. The difference
161 between the two is that `LIB_SPEC' is used at the end of the command given
164 If this macro is not defined, a default is provided that loads the standard
165 C library from the usual place. See `gcc.c'.
167 Defined in svr4.h. */
169 #define LIB_SPEC "--start-group -lsim -lc --end-group"
171 /* Another C string constant that tells the GNU CC driver program how and when
172 to place a reference to `libgcc.a' into the linker command line. This
173 constant is placed both before and after the value of `LIB_SPEC'.
175 If this macro is not defined, the GNU CC driver provides a default that
176 passes the string `-lgcc' to the linker unless the `-shared' option is
178 /* #define LIBGCC_SPEC "" */
180 /* Another C string constant used much like `LINK_SPEC'. The difference
181 between the two is that `STARTFILE_SPEC' is used at the very beginning of
182 the command given to the linker.
184 If this macro is not defined, a default is provided that loads the standard
185 C startup file from the usual place. See `gcc.c'.
187 Defined in svr4.h. */
189 #undef STARTFILE_SPEC
190 #define STARTFILE_SPEC "crt0%O%s crtbegin%O%s"
192 /* Another C string constant used much like `LINK_SPEC'. The difference
193 between the two is that `ENDFILE_SPEC' is used at the very end of the
194 command given to the linker.
196 Do not define this macro if it does not need to do anything.
198 Defined in svr4.h. */
201 #define ENDFILE_SPEC "crtend%O%s"
203 /* Define this macro if the driver program should find the library `libgcc.a'
204 itself and should not pass `-L' options to the linker. If you do not define
205 this macro, the driver program will pass the argument `-lgcc' to tell the
206 linker to do the search and will pass `-L' options to it. */
207 /* #define LINK_LIBGCC_SPECIAL */
209 /* Define this macro if the driver program should find the library `libgcc.a'.
210 If you do not define this macro, the driver program will pass the argument
211 `-lgcc' to tell the linker to do the search. This macro is similar to
212 `LINK_LIBGCC_SPECIAL', except that it does not affect `-L' options. */
213 /* #define LINK_LIBGCC_SPECIAL_1 */
215 /* Define this macro to provide additional specifications to put in the `specs'
216 file that can be used in various specifications like `CC1_SPEC'.
218 The definition should be an initializer for an array of structures,
219 containing a string constant, that defines the specification name, and a
220 string constant that provides the specification.
222 Do not define this macro if it does not need to do anything. */
223 /* #define EXTRA_SPECS {{}} */
225 /* Define this macro as a C expression for the initializer of an array of
226 string to tell the driver program which options are defaults for this target
227 and thus do not need to be handled specially when using `MULTILIB_OPTIONS'.
229 Do not define this macro if `MULTILIB_OPTIONS' is not defined in the target
230 makefile fragment or if none of the options listed in `MULTILIB_OPTIONS' are
231 set by default. *Note Target Fragment::. */
232 /* #define MULTILIB_DEFAULTS {} */
234 /* Define this macro to tell `gcc' that it should only translate a `-B' prefix
235 into a `-L' linker option if the prefix indicates an absolute file name. */
236 /* #define RELATIVE_PREFIX_NOT_LINKDIR */
238 /* Define this macro as a C string constant if you wish to override the
239 standard choice of `/usr/local/lib/gcc-lib/' as the default prefix to try
240 when searching for the executable files of the compiler. */
241 /* #define STANDARD_EXEC_PREFIX "" */
243 /* If defined, this macro is an additional prefix to try after
244 `STANDARD_EXEC_PREFIX'. `MD_EXEC_PREFIX' is not searched when the `-b'
245 option is used, or the compiler is built as a cross compiler.
247 Defined in svr4.h for host compilers. */
248 /* #define MD_EXEC_PREFIX "" */
250 /* Define this macro as a C string constant if you wish to override the
251 standard choice of `/usr/local/lib/' as the default prefix to try when
252 searching for startup files such as `crt0.o'. */
253 /* #define STANDARD_STARTFILE_PREFIX "" */
255 /* If defined, this macro supplies an additional prefix to try after the
256 standard prefixes. `MD_EXEC_PREFIX' is not searched when the `-b' option is
257 used, or when the compiler is built as a cross compiler.
259 Defined in svr4.h for host compilers. */
260 /* #define MD_STARTFILE_PREFIX "" */
262 /* If defined, this macro supplies yet another prefix to try after the standard
263 prefixes. It is not searched when the `-b' option is used, or when the
264 compiler is built as a cross compiler. */
265 /* #define MD_STARTFILE_PREFIX_1 "" */
267 /* Define this macro as a C string constant if you with to set environment
268 variables for programs called by the driver, such as the assembler and
269 loader. The driver passes the value of this macro to `putenv' to initialize
270 the necessary environment variables. */
271 /* #define INIT_ENVIRONMENT "" */
273 /* Define this macro as a C string constant if you wish to override the
274 standard choice of `/usr/local/include' as the default prefix to try when
275 searching for local header files. `LOCAL_INCLUDE_DIR' comes before
276 `SYSTEM_INCLUDE_DIR' in the search order.
278 Cross compilers do not use this macro and do not search either
279 `/usr/local/include' or its replacement. */
280 /* #define LOCAL_INCLUDE_DIR "" */
282 /* Define this macro as a C string constant if you wish to specify a
283 system-specific directory to search for header files before the standard
284 directory. `SYSTEM_INCLUDE_DIR' comes before `STANDARD_INCLUDE_DIR' in the
287 Cross compilers do not use this macro and do not search the directory
289 /* #define SYSTEM_INCLUDE_DIR "" */
291 /* Define this macro as a C string constant if you wish to override the
292 standard choice of `/usr/include' as the default prefix to try when
293 searching for header files.
295 Cross compilers do not use this macro and do not search either
296 `/usr/include' or its replacement. */
297 /* #define STANDARD_INCLUDE_DIR "" */
299 /* Define this macro if you wish to override the entire default search path for
300 include files. The default search path includes `GCC_INCLUDE_DIR',
301 `LOCAL_INCLUDE_DIR', `SYSTEM_INCLUDE_DIR', `GPLUSPLUS_INCLUDE_DIR', and
302 `STANDARD_INCLUDE_DIR'. In addition, `GPLUSPLUS_INCLUDE_DIR' and
303 `GCC_INCLUDE_DIR' are defined automatically by `Makefile', and specify
304 private search areas for GCC. The directory `GPLUSPLUS_INCLUDE_DIR' is used
305 only for C++ programs.
307 The definition should be an initializer for an array of structures. Each
308 array element should have two elements: the directory name (a string
309 constant) and a flag for C++-only directories. Mark the end of the array
310 with a null element. For example, here is the definition used for VMS:
312 #define INCLUDE_DEFAULTS \
314 { "GNU_GXX_INCLUDE:", 1}, \
315 { "GNU_CC_INCLUDE:", 0}, \
316 { "SYS$SYSROOT:[SYSLIB.]", 0}, \
321 Here is the order of prefixes tried for exec files:
323 1. Any prefixes specified by the user with `-B'.
325 2. The environment variable `GCC_EXEC_PREFIX', if any.
327 3. The directories specified by the environment variable
330 4. The macro `STANDARD_EXEC_PREFIX'.
334 6. The macro `MD_EXEC_PREFIX', if any.
336 Here is the order of prefixes tried for startfiles:
338 1. Any prefixes specified by the user with `-B'.
340 2. The environment variable `GCC_EXEC_PREFIX', if any.
342 3. The directories specified by the environment variable
343 `LIBRARY_PATH' (native only, cross compilers do not use this).
345 4. The macro `STANDARD_EXEC_PREFIX'.
349 6. The macro `MD_EXEC_PREFIX', if any.
351 7. The macro `MD_STARTFILE_PREFIX', if any.
353 8. The macro `STANDARD_STARTFILE_PREFIX'.
358 /* #define INCLUDE_DEFAULTS {{ }} */
361 /* Run-time target specifications */
363 /* Define this to be a string constant containing `-D' options to define the
364 predefined macros that identify this machine and system. These macros will
365 be predefined unless the `-ansi' option is specified.
367 In addition, a parallel set of macros are predefined, whose names are made
368 by appending `__' at the beginning and at the end. These `__' macros are
369 permitted by the ANSI standard, so they are predefined regardless of whether
370 `-ansi' is specified.
372 For example, on the Sun, one can use the following value:
374 "-Dmc68000 -Dsun -Dunix"
376 The result is to define the macros `__mc68000__', `__sun__' and `__unix__'
377 unconditionally, and the macros `mc68000', `sun' and `unix' provided `-ansi'
379 #define CPP_PREDEFINES "-D__D30V__ -Amachine=d30v"
381 /* This declaration should be present. */
382 extern int target_flags;
384 /* This series of macros is to allow compiler command arguments to enable or
385 disable the use of optional features of the target machine. For example,
386 one machine description serves both the 68000 and the 68020; a command
387 argument tells the compiler whether it should use 68020-only instructions or
388 not. This command argument works by means of a macro `TARGET_68020' that
389 tests a bit in `target_flags'.
391 Define a macro `TARGET_FEATURENAME' for each such option. Its definition
392 should test a bit in `target_flags'; for example:
394 #define TARGET_68020 (target_flags & 1)
396 One place where these macros are used is in the condition-expressions of
397 instruction patterns. Note how `TARGET_68020' appears frequently in the
398 68000 machine description file, `m68k.md'. Another place they are used is
399 in the definitions of the other macros in the `MACHINE.h' file. */
401 #define MASK_NO_COND_MOVE 0x00000001 /* disable conditional moves */
403 #define MASK_DEBUG_ARG 0x10000000 /* debug argument handling */
404 #define MASK_DEBUG_STACK 0x20000000 /* debug stack allocations */
405 #define MASK_DEBUG_ADDR 0x40000000 /* debug GO_IF_LEGITIMATE_ADDRESS */
407 #define TARGET_NO_COND_MOVE (target_flags & MASK_NO_COND_MOVE)
408 #define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG)
409 #define TARGET_DEBUG_STACK (target_flags & MASK_DEBUG_STACK)
410 #define TARGET_DEBUG_ADDR (target_flags & MASK_DEBUG_ADDR)
412 #define TARGET_COND_MOVE (! TARGET_NO_COND_MOVE)
414 /* Default switches used. */
415 #ifndef TARGET_DEFAULT
416 #define TARGET_DEFAULT 0
419 /* This macro defines names of command options to set and clear bits in
420 `target_flags'. Its definition is an initializer with a subgrouping for
423 Each subgrouping contains a string constant, that defines the option name, a
424 number, which contains the bits to set in `target_flags', and a second
425 string which is the description displayed by `--help'. If the number is
426 negative then the bits specified by the number are cleared instead of being
427 set. If the description string is present but empty, then no help
428 information will be displayed for that option, but it will not count as an
429 undocumented option. The actual option name is made by appending `-m' to
432 One of the subgroupings should have a null string. The number in this
433 grouping is the default value for target_flags. Any target options act
434 starting with that value.
436 Here is an example which defines -m68000 and -m68020 with opposite meanings,
437 and picks the latter as the default:
439 #define TARGET_SWITCHES \
440 { { "68020", TARGET_MASK_68020, "" }, \
441 { "68000", -TARGET_MASK_68020, "Compile for the 68000" }, \
442 { "", TARGET_MASK_68020, "" }} */
444 #define TARGET_SWITCHES \
446 { "cond-move", -MASK_NO_COND_MOVE, \
447 N_("Enable use of conditional move instructions") }, \
449 { "no-cond-move", MASK_NO_COND_MOVE, \
450 N_("Disable use of conditional move instructions") }, \
452 { "debug-arg", MASK_DEBUG_ARG, \
453 N_("Debug argument support in compiler") }, \
455 { "debug-stack", MASK_DEBUG_STACK, \
456 N_("Debug stack support in compiler") }, \
458 { "debug-addr", MASK_DEBUG_ADDR, \
459 N_("Debug memory address support in compiler") }, \
461 { "asm-optimize", 0, \
462 N_("Make adjacent short instructions parallel if possible.") }, \
464 { "no-asm-optimize", 0, \
465 N_("Do not make adjacent short instructions parallel.") }, \
468 N_("Link programs/data to be in external memory by default") }, \
471 N_("Link programs/data to be in external memory by default") }, \
474 N_("Link programs/data to be in onchip memory by default") }, \
476 { "", TARGET_DEFAULT, "" }, \
479 /* This macro is similar to `TARGET_SWITCHES' but defines names of command
480 options that have values. Its definition is an initializer with a
481 subgrouping for each command option.
483 Each subgrouping contains a string constant, that defines the fixed part of
484 the option name, the address of a variable, and a description string. The
485 variable, type `char *', is set to the variable part of the given option if
486 the fixed part matches. The actual option name is made by appending `-m' to
489 Here is an example which defines `-mshort-data-<number>'. If the given
490 option is `-mshort-data-512', the variable `m88k_short_data' will be set to
493 extern char *m88k_short_data;
494 #define TARGET_OPTIONS \
495 { { "short-data-", &m88k_short_data, \
496 "Specify the size of the short data section" } } */
498 #define TARGET_OPTIONS \
500 {"branch-cost=", &d30v_branch_cost_string, \
501 N_("Change the branch costs within the compiler") }, \
503 {"cond-exec=", &d30v_cond_exec_string, \
504 N_("Change the threshold for conversion to conditional execution") }, \
507 /* This macro is a C statement to print on `stderr' a string describing the
508 particular machine description choice. Every machine description should
509 define `TARGET_VERSION'. For example:
512 #define TARGET_VERSION \
513 fprintf (stderr, " (68k, Motorola syntax)");
515 #define TARGET_VERSION \
516 fprintf (stderr, " (68k, MIT syntax)");
518 #define TARGET_VERSION fprintf (stderr, " d30v")
520 /* Sometimes certain combinations of command options do not make sense on a
521 particular target machine. You can define a macro `OVERRIDE_OPTIONS' to
522 take account of this. This macro, if defined, is executed once just after
523 all the command options have been parsed.
525 Don't use this macro to turn on various extra optimizations for `-O'. That
526 is what `OPTIMIZATION_OPTIONS' is for. */
528 #define OVERRIDE_OPTIONS override_options ()
530 /* Some machines may desire to change what optimizations are performed for
531 various optimization levels. This macro, if defined, is executed once just
532 after the optimization level is determined and before the remainder of the
533 command options have been parsed. Values set in this macro are used as the
534 default values for the other command line options.
536 LEVEL is the optimization level specified; 2 if `-O2' is specified, 1 if
537 `-O' is specified, and 0 if neither is specified.
539 SIZE is non-zero if `-Os' is specified, 0 otherwise.
541 You should not use this macro to change options that are not
542 machine-specific. These should uniformly selected by the same optimization
543 level on all supported machines. Use this macro to enable machbine-specific
546 *Do not examine `write_symbols' in this macro!* The debugging options are
547 *not supposed to alter the generated code. */
549 /* #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) */
551 /* Define this macro if debugging can be performed even without a frame
552 pointer. If this macro is defined, GNU CC will turn on the
553 `-fomit-frame-pointer' option whenever `-O' is specified. */
554 #define CAN_DEBUG_WITHOUT_FP
559 /* Define this macro to have the value 1 if the most significant bit in a byte
560 has the lowest number; otherwise define it to have the value zero. This
561 means that bit-field instructions count from the most significant bit. If
562 the machine has no bit-field instructions, then this must still be defined,
563 but it doesn't matter which value it is defined to. This macro need not be
566 This macro does not affect the way structure fields are packed into bytes or
567 words; that is controlled by `BYTES_BIG_ENDIAN'. */
568 #define BITS_BIG_ENDIAN 1
570 /* Define this macro to have the value 1 if the most significant byte in a word
571 has the lowest number. This macro need not be a constant. */
572 #define BYTES_BIG_ENDIAN 1
574 /* Define this macro to have the value 1 if, in a multiword object, the most
575 significant word has the lowest number. This applies to both memory
576 locations and registers; GNU CC fundamentally assumes that the order of
577 words in memory is the same as the order in registers. This macro need not
579 #define WORDS_BIG_ENDIAN 1
581 /* Define this macro if WORDS_BIG_ENDIAN is not constant. This must be a
582 constant value with the same meaning as WORDS_BIG_ENDIAN, which will be used
583 only when compiling libgcc2.c. Typically the value will be set based on
584 preprocessor defines. */
585 /* #define LIBGCC2_WORDS_BIG_ENDIAN */
587 /* Define this macro to have the value 1 if `DFmode', `XFmode' or `TFmode'
588 floating point numbers are stored in memory with the word containing the
589 sign bit at the lowest address; otherwise define it to have the value 0.
590 This macro need not be a constant.
592 You need not define this macro if the ordering is the same as for multi-word
594 /* #define FLOAT_WORDS_BIG_EnNDIAN */
596 /* Define this macro to be the number of bits in an addressable storage unit
597 (byte); normally 8. */
598 #define BITS_PER_UNIT 8
600 /* Number of bits in a word; normally 32. */
601 #define BITS_PER_WORD 32
603 /* Maximum number of bits in a word. If this is undefined, the default is
604 `BITS_PER_WORD'. Otherwise, it is the constant value that is the largest
605 value that `BITS_PER_WORD' can have at run-time. */
606 /* #define MAX_BITS_PER_WORD */
608 /* Number of storage units in a word; normally 4. */
609 #define UNITS_PER_WORD 4
611 /* Minimum number of units in a word. If this is undefined, the default is
612 `UNITS_PER_WORD'. Otherwise, it is the constant value that is the smallest
613 value that `UNITS_PER_WORD' can have at run-time. */
614 /* #define MIN_UNITS_PER_WORD */
616 /* Width of a pointer, in bits. You must specify a value no wider than the
617 width of `Pmode'. If it is not equal to the width of `Pmode', you must
618 define `POINTERS_EXTEND_UNSIGNED'. */
619 #define POINTER_SIZE 32
621 /* A C expression whose value is nonzero if pointers that need to be extended
622 from being `POINTER_SIZE' bits wide to `Pmode' are sign-extended and zero if
623 they are zero-extended.
625 You need not define this macro if the `POINTER_SIZE' is equal to the width
627 /* #define POINTERS_EXTEND_UNSIGNED */
629 /* A macro to update M and UNSIGNEDP when an object whose type is TYPE and
630 which has the specified mode and signedness is to be stored in a register.
631 This macro is only called when TYPE is a scalar type.
633 On most RISC machines, which only have operations that operate on a full
634 register, define this macro to set M to `word_mode' if M is an integer mode
635 narrower than `BITS_PER_WORD'. In most cases, only integer modes should be
636 widened because wider-precision floating-point operations are usually more
637 expensive than their narrower counterparts.
639 For most machines, the macro definition does not change UNSIGNEDP. However,
640 some machines, have instructions that preferentially handle either signed or
641 unsigned quantities of certain modes. For example, on the DEC Alpha, 32-bit
642 loads from memory and 32-bit add instructions sign-extend the result to 64
643 bits. On such machines, set UNSIGNEDP according to which kind of extension
646 Do not define this macro if it would never modify M. */
647 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
649 if (GET_MODE_CLASS (MODE) == MODE_INT \
650 && GET_MODE_SIZE (MODE) < 4) \
654 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
655 be done for outgoing function arguments. */
656 /* #define PROMOTE_FUNCTION_ARGS */
658 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
659 be done for the return value of functions.
661 If this macro is defined, `FUNCTION_VALUE' must perform the same promotions
662 done by `PROMOTE_MODE'. */
663 /* #define PROMOTE_FUNCTION_RETURN */
665 /* Define this macro if the promotion described by `PROMOTE_MODE' should *only*
666 be performed for outgoing function arguments or function return values, as
667 specified by `PROMOTE_FUNCTION_ARGS' and `PROMOTE_FUNCTION_RETURN',
669 /* #define PROMOTE_FOR_CALL_ONLY */
671 /* Normal alignment required for function parameters on the stack, in bits.
672 All stack parameters receive at least this much alignment regardless of data
673 type. On most machines, this is the same as the size of an integer. */
675 #define PARM_BOUNDARY 32
677 /* Define this macro if you wish to preserve a certain alignment for the stack
678 pointer. The definition is a C expression for the desired alignment
681 If `PUSH_ROUNDING' is not defined, the stack will always be aligned to the
682 specified boundary. If `PUSH_ROUNDING' is defined and specifies a less
683 strict alignment than `STACK_BOUNDARY', the stack may be momentarily
684 unaligned while pushing arguments. */
686 #define STACK_BOUNDARY 64
688 /* Alignment required for a function entry point, in bits. */
690 #define FUNCTION_BOUNDARY 64
692 /* Biggest alignment that any data type can require on this machine,
695 #define BIGGEST_ALIGNMENT 64
697 /* Biggest alignment that any structure field can require on this machine, in
698 bits. If defined, this overrides `BIGGEST_ALIGNMENT' for structure fields
700 /* #define BIGGEST_FIELD_ALIGNMENT */
702 /* Biggest alignment supported by the object file format of this machine. Use
703 this macro to limit the alignment which can be specified using the
704 `__attribute__ ((aligned (N)))' construct. If not defined, the default
705 value is `BIGGEST_ALIGNMENT'.
707 Defined in svr4.h. */
708 /* #define MAX_OFILE_ALIGNMENT */
710 /* If defined, a C expression to compute the alignment for a static variable.
711 TYPE is the data type, and BASIC-ALIGN is the alignment that the object
712 would ordinarily have. The value of this macro is used instead of that
713 alignment to align the object.
715 If this macro is not defined, then BASIC-ALIGN is used.
717 One use of this macro is to increase alignment of medium-size data to make
718 it all fit in fewer cache lines. Another is to cause character arrays to be
719 word-aligned so that `strcpy' calls that copy constants to character arrays
720 can be done inline. */
722 #define DATA_ALIGNMENT(TYPE, ALIGN) \
723 (TREE_CODE (TYPE) == ARRAY_TYPE \
724 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
725 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
727 /* If defined, a C expression to compute the alignment given to a constant that
728 is being placed in memory. CONSTANT is the constant and BASIC-ALIGN is the
729 alignment that the object would ordinarily have. The value of this macro is
730 used instead of that alignment to align the object.
732 If this macro is not defined, then BASIC-ALIGN is used.
734 The typical use of this macro is to increase alignment for string constants
735 to be word aligned so that `strcpy' calls that copy constants can be done
738 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
739 (TREE_CODE (EXP) == STRING_CST \
740 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
742 /* Alignment in bits to be given to a structure bit field that follows an empty
743 field such as `int : 0;'.
745 Note that `PCC_BITFIELD_TYPE_MATTERS' also affects the alignment that
746 results from an empty field. */
747 /* #define EMPTY_FIELD_BOUNDARY */
749 /* Number of bits which any structure or union's size must be a multiple of.
750 Each structure or union's size is rounded up to a multiple of this.
752 If you do not define this macro, the default is the same as `BITS_PER_UNIT'. */
753 /* #define STRUCTURE_SIZE_BOUNDARY */
755 /* Define this macro to be the value 1 if instructions will fail to work if
756 given data not on the nominal alignment. If instructions will merely go
757 slower in that case, define this macro as 0. */
759 #define STRICT_ALIGNMENT 1
761 /* Define this if you wish to imitate the way many other C compilers handle
762 alignment of bitfields and the structures that contain them.
764 The behavior is that the type written for a bitfield (`int', `short', or
765 other integer type) imposes an alignment for the entire structure, as if the
766 structure really did contain an ordinary field of that type. In addition,
767 the bitfield is placed within the structure so that it would fit within such
768 a field, not crossing a boundary for it.
770 Thus, on most machines, a bitfield whose type is written as `int' would not
771 cross a four-byte boundary, and would force four-byte alignment for the
772 whole structure. (The alignment used may not be four bytes; it is
773 controlled by the other alignment parameters.)
775 If the macro is defined, its definition should be a C expression; a nonzero
776 value for the expression enables this behavior.
778 Note that if this macro is not defined, or its value is zero, some bitfields
779 may cross more than one alignment boundary. The compiler can support such
780 references if there are `insv', `extv', and `extzv' insns that can directly
783 The other known way of making bitfields work is to define
784 `STRUCTURE_SIZE_BOUNDARY' as large as `BIGGEST_ALIGNMENT'. Then every
785 structure can be accessed with fullwords.
787 Unless the machine has bitfield instructions or you define
788 `STRUCTURE_SIZE_BOUNDARY' that way, you must define
789 `PCC_BITFIELD_TYPE_MATTERS' to have a nonzero value.
791 If your aim is to make GNU CC use the same conventions for laying out
792 bitfields as are used by another compiler, here is how to investigate what
793 the other compiler does. Compile and run this program:
811 printf ("Size of foo1 is %d\n",
812 sizeof (struct foo1));
813 printf ("Size of foo2 is %d\n",
814 sizeof (struct foo2));
818 If this prints 2 and 5, then the compiler's behavior is what you would get
819 from `PCC_BITFIELD_TYPE_MATTERS'.
821 Defined in svr4.h. */
823 #define PCC_BITFIELD_TYPE_MATTERS 1
825 /* Like PCC_BITFIELD_TYPE_MATTERS except that its effect is limited to aligning
826 a bitfield within the structure. */
827 /* #define BITFIELD_NBYTES_LIMITED */
829 /* Define this macro as an expression for the overall size of a structure
830 (given by STRUCT as a tree node) when the size computed from the fields is
831 SIZE and the alignment is ALIGN.
833 The default is to round SIZE up to a multiple of ALIGN. */
834 /* #define ROUND_TYPE_SIZE(STRUCT, SIZE, ALIGN) */
836 /* Define this macro as an expression for the alignment of a structure (given
837 by STRUCT as a tree node) if the alignment computed in the usual way is
838 COMPUTED and the alignment explicitly specified was SPECIFIED.
840 The default is to use SPECIFIED if it is larger; otherwise, use the smaller
841 of COMPUTED and `BIGGEST_ALIGNMENT' */
842 /* #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) */
844 /* An integer expression for the size in bits of the largest integer machine
845 mode that should actually be used. All integer machine modes of this size
846 or smaller can be used for structures and unions with the appropriate sizes.
847 If this macro is undefined, `GET_MODE_BITSIZE (DImode)' is assumed. */
848 /* #define MAX_FIXED_MODE_SIZE */
850 /* A C statement to validate the value VALUE (of type `double') for mode MODE.
851 This means that you check whether VALUE fits within the possible range of
852 values for mode MODE on this target machine. The mode MODE is always a mode
853 of class `MODE_FLOAT'. OVERFLOW is nonzero if the value is already known to
856 If VALUE is not valid or if OVERFLOW is nonzero, you should set OVERFLOW to
857 1 and then assign some valid value to VALUE. Allowing an invalid value to
858 go through the compiler can produce incorrect assembler code which may even
859 cause Unix assemblers to crash.
861 This macro need not be defined if there is no work for it to do. */
862 /* #define CHECK_FLOAT_VALUE(MODE, VALUE, OVERFLOW) */
864 /* A code distinguishing the floating point format of the target machine.
865 There are three defined values:
868 This code indicates IEEE floating point. It is the default;
869 there is no need to define this macro when the format is IEEE.
872 This code indicates the peculiar format used on the Vax.
874 UNKNOWN_FLOAT_FORMAT'
875 This code indicates any other format.
877 The value of this macro is compared with `HOST_FLOAT_FORMAT' (*note
878 Config::.) to determine whether the target machine has the same format as
879 the host machine. If any other formats are actually in use on supported
880 machines, new codes should be defined for them.
882 The ordering of the component words of floating point values stored in
883 memory is controlled by `FLOAT_WORDS_BIG_ENDIAN' for the target machine and
884 `HOST_FLOAT_WORDS_BIG_ENDIAN' for the host. */
885 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
887 /* GNU CC supports two ways of implementing C++ vtables: traditional or with
888 so-called "thunks". The flag `-fvtable-thunk' chooses between them. Define
889 this macro to be a C expression for the default value of that flag. If
890 `DEFAULT_VTABLE_THUNKS' is 0, GNU CC uses the traditional implementation by
891 default. The "thunk" implementation is more efficient (especially if you
892 have provided an implementation of `ASM_OUTPUT_MI_THUNK', see *Note Function
893 Entry::), but is not binary compatible with code compiled using the
894 traditional implementation. If you are writing a new ports, define
895 `DEFAULT_VTABLE_THUNKS' to 1.
897 If you do not define this macro, the default for `-fvtable-thunk' is 0. */
898 #define DEFAULT_VTABLE_THUNKS 0
901 /* Layout of Source Language Data Types */
903 /* A C expression for the size in bits of the type `int' on the target machine.
904 If you don't define this, the default is one word. */
905 #define INT_TYPE_SIZE 32
907 /* Maximum number for the size in bits of the type `int' on the target machine.
908 If this is undefined, the default is `INT_TYPE_SIZE'. Otherwise, it is the
909 constant value that is the largest value that `INT_TYPE_SIZE' can have at
910 run-time. This is used in `cpp'. */
911 /* #define MAX_INT_TYPE_SIZE */
913 /* A C expression for the size in bits of the type `short' on the target
914 machine. If you don't define this, the default is half a word. (If this
915 would be less than one storage unit, it is rounded up to one unit.) */
916 #define SHORT_TYPE_SIZE 16
918 /* A C expression for the size in bits of the type `long' on the target
919 machine. If you don't define this, the default is one word. */
920 #define LONG_TYPE_SIZE 32
922 /* Maximum number for the size in bits of the type `long' on the target
923 machine. If this is undefined, the default is `LONG_TYPE_SIZE'. Otherwise,
924 it is the constant value that is the largest value that `LONG_TYPE_SIZE' can
925 have at run-time. This is used in `cpp'. */
926 /* #define MAX_LONG_TYPE_SIZE */
928 /* A C expression for the size in bits of the type `long long' on the target
929 machine. If you don't define this, the default is two words. If you want
930 to support GNU Ada on your machine, the value of macro must be at least 64. */
931 #define LONG_LONG_TYPE_SIZE 64
933 /* A C expression for the size in bits of the type `char' on the target
934 machine. If you don't define this, the default is one quarter of a word.
935 (If this would be less than one storage unit, it is rounded up to one unit.) */
936 #define CHAR_TYPE_SIZE 8
938 /* Maximum number for the size in bits of the type `char' on the target
939 machine. If this is undefined, the default is `CHAR_TYPE_SIZE'. Otherwise,
940 it is the constant value that is the largest value that `CHAR_TYPE_SIZE' can
941 have at run-time. This is used in `cpp'. */
942 /* #define MAX_CHAR_TYPE_SIZE */
944 /* A C expression for the size in bits of the type `float' on the target
945 machine. If you don't define this, the default is one word. */
946 #define FLOAT_TYPE_SIZE 32
948 /* A C expression for the size in bits of the type `double' on the target
949 machine. If you don't define this, the default is two words. */
950 #define DOUBLE_TYPE_SIZE 64
952 /* A C expression for the size in bits of the type `long double' on the target
953 machine. If you don't define this, the default is two words. */
954 #define LONG_DOUBLE_TYPE_SIZE 64
956 /* An expression whose value is 1 or 0, according to whether the type `char'
957 should be signed or unsigned by default. The user can always override this
958 default with the options `-fsigned-char' and `-funsigned-char'. */
959 #define DEFAULT_SIGNED_CHAR 1
961 /* A C expression to determine whether to give an `enum' type only as many
962 bytes as it takes to represent the range of possible values of that type. A
963 nonzero value means to do that; a zero value means all `enum' types should
964 be allocated like `int'.
966 If you don't define the macro, the default is 0. */
967 /* #define DEFAULT_SHORT_ENUMS */
969 /* A C expression for a string describing the name of the data type to use for
970 size values. The typedef name `size_t' is defined using the contents of the
973 The string can contain more than one keyword. If so, separate them with
974 spaces, and write first any length keyword, then `unsigned' if appropriate,
975 and finally `int'. The string must exactly match one of the data type names
976 defined in the function `init_decl_processing' in the file `c-decl.c'. You
977 may not omit `int' or change the order--that would cause the compiler to
980 If you don't define this macro, the default is `"long unsigned int"'.
982 Defined in svr4.h. */
983 /* #define SIZE_TYPE */
985 /* A C expression for a string describing the name of the data type to use for
986 the result of subtracting two pointers. The typedef name `ptrdiff_t' is
987 defined using the contents of the string. See `SIZE_TYPE' above for more
990 If you don't define this macro, the default is `"long int"'.
992 Defined in svr4.h. */
993 /* #define PTRDIFF_TYPE */
995 /* A C expression for a string describing the name of the data type to use for
996 wide characters. The typedef name `wchar_t' is defined using the contents
997 of the string. See `SIZE_TYPE' above for more information.
999 If you don't define this macro, the default is `"int"'.
1001 Defined in svr4.h. */
1002 /* #define WCHAR_TYPE */
1004 /* A C expression for the size in bits of the data type for wide characters.
1005 This is used in `cpp', which cannot make use of `WCHAR_TYPE'.
1007 Defined in svr4.h. */
1008 /* #define WCHAR_TYPE_SIZE */
1010 /* Maximum number for the size in bits of the data type for wide characters.
1011 If this is undefined, the default is `WCHAR_TYPE_SIZE'. Otherwise, it is
1012 the constant value that is the largest value that `WCHAR_TYPE_SIZE' can have
1013 at run-time. This is used in `cpp'. */
1014 /* #define MAX_WCHAR_TYPE_SIZE */
1016 /* Define this macro if the compiler can group all the selectors together into
1017 a vector and use just one label at the beginning of the vector. Otherwise,
1018 the compiler must give each selector its own assembler label.
1020 On certain machines, it is important to have a separate label for each
1021 selector because this enables the linker to eliminate duplicate selectors. */
1022 /* #define OBJC_SELECTORS_WITHOUT_LABELS */
1025 /* D30V register layout. */
1027 /* Return true if a value is inside a range */
1028 #define IN_RANGE_P(VALUE, LOW, HIGH) \
1029 (((unsigned)((VALUE) - (LOW))) <= ((unsigned)((HIGH) - (LOW))))
1031 /* General purpose registers. */
1032 #define GPR_FIRST 0 /* First gpr */
1033 #define GPR_LAST (GPR_FIRST + 63) /* Last gpr */
1034 #define GPR_R0 GPR_FIRST /* R0, constant 0 */
1035 #define GPR_ARG_FIRST (GPR_FIRST + 2) /* R2, first argument reg */
1036 #define GPR_ARG_LAST (GPR_FIRST + 17) /* R17, last argument reg */
1037 #define GPR_RET_VALUE GPR_ARG_FIRST /* R2, function return reg */
1038 #define GPR_ATMP_FIRST (GPR_FIRST + 20) /* R20, tmp to save accs */
1039 #define GPR_ATMP_LAST (GPR_FIRST + 21) /* R21, tmp to save accs */
1040 #define GPR_STACK_TMP (GPR_FIRST + 22) /* R22, tmp for saving stack */
1041 #define GPR_RES_FIRST (GPR_FIRST + 32) /* R32, first reserved reg */
1042 #define GPR_RES_LAST (GPR_FIRST + 35) /* R35, last reserved reg */
1043 #define GPR_FP (GPR_FIRST + 61) /* Frame pointer */
1044 #define GPR_LINK (GPR_FIRST + 62) /* Return address register */
1045 #define GPR_SP (GPR_FIRST + 63) /* Stack pointer */
1047 /* Argument register that is eliminated in favor of the frame and/or stack
1048 pointer. Also add register to point to where the return address is
1050 #define SPECIAL_REG_FIRST (GPR_LAST + 1)
1051 #define SPECIAL_REG_LAST (SPECIAL_REG_FIRST)
1052 #define ARG_POINTER_REGNUM (SPECIAL_REG_FIRST + 0)
1053 #define SPECIAL_REG_P(R) ((R) == SPECIAL_REG_FIRST)
1055 #define GPR_OR_SPECIAL_REG_P(R) IN_RANGE_P (R, GPR_FIRST, SPECIAL_REG_LAST)
1056 #define GPR_P(R) IN_RANGE_P (R, GPR_FIRST, GPR_LAST)
1057 #define GPR_OR_PSEUDO_P(R) (GPR_OR_SPECIAL_REG_P (R) \
1058 || (R) >= FIRST_PSEUDO_REGISTER)
1061 #define FLAG_FIRST (SPECIAL_REG_LAST + 1) /* First flag */
1062 #define FLAG_LAST (FLAG_FIRST + 7) /* Last flag */
1063 #define FLAG_F0 (FLAG_FIRST) /* F0, used in prediction */
1064 #define FLAG_F1 (FLAG_FIRST + 1) /* F1, used in prediction */
1065 #define FLAG_F2 (FLAG_FIRST + 2) /* F2, general flag */
1066 #define FLAG_F3 (FLAG_FIRST + 3) /* F3, general flag */
1067 #define FLAG_SAT (FLAG_FIRST + 4) /* F4, saturation flag */
1068 #define FLAG_OVERFLOW (FLAG_FIRST + 5) /* F5, overflow flag */
1069 #define FLAG_ACC_OVER (FLAG_FIRST + 6) /* F6, accumulated overflow */
1070 #define FLAG_CARRY (FLAG_FIRST + 7) /* F7, carry/borrow flag */
1071 #define FLAG_BORROW FLAG_CARRY
1073 #define FLAG_P(R) IN_RANGE_P (R, FLAG_FIRST, FLAG_LAST)
1074 #define FLAG_OR_PSEUDO_P(R) (FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1076 #define BR_FLAG_P(R) IN_RANGE_P (R, FLAG_F0, FLAG_F1)
1077 #define BR_FLAG_OR_PSEUDO_P(R) (BR_FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1080 #define ACCUM_FIRST (FLAG_LAST + 1) /* First accumulator */
1081 #define ACCUM_A0 ACCUM_FIRST /* Register A0 */
1082 #define ACCUM_A1 (ACCUM_FIRST + 1) /* Register A1 */
1083 #define ACCUM_LAST (ACCUM_FIRST + 1) /* Last accumulator */
1085 #define ACCUM_P(R) IN_RANGE_P (R, ACCUM_FIRST, ACCUM_LAST)
1086 #define ACCUM_OR_PSEUDO_P(R) (ACCUM_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1088 /* Special registers. Note, we only define the registers that can actually
1090 #define CR_FIRST (ACCUM_LAST + 1) /* First CR */
1091 #define CR_LAST (CR_FIRST + 14) /* Last CR */
1092 #define CR_PSW (CR_FIRST + 0) /* CR0, Program status word */
1093 #define CR_BPSW (CR_FIRST + 1) /* CR1, Backup PSW */
1094 #define CR_PC (CR_FIRST + 2) /* CR2, Program counter */
1095 #define CR_BPC (CR_FIRST + 3) /* CR3, Backup PC */
1096 #define CR_DPSW (CR_FIRST + 4) /* CR4, Debug PSW */
1097 #define CR_DPC (CR_FIRST + 5) /* CR5, Debug PC */
1098 #define CR_RPT_C (CR_FIRST + 6) /* CR7, loop count register */
1099 #define CR_RPT_S (CR_FIRST + 7) /* CR8, loop start address */
1100 #define CR_RPT_E (CR_FIRST + 8) /* CR9, loop end address */
1101 #define CR_MOD_S (CR_FIRST + 9) /* CR10, modulo address start*/
1102 #define CR_MOD_E (CR_FIRST + 10) /* CR11, modulo address */
1103 #define CR_IBA (CR_FIRST + 11) /* CR14, Interrupt break addr */
1104 #define CR_EIT_VB (CR_FIRST + 12) /* CR15, EIT vector address */
1105 #define CR_INT_S (CR_FIRST + 13) /* CR16, Interrupt status */
1106 #define CR_INT_M (CR_FIRST + 14) /* CR17, Interrupt mask */
1108 #define CR_P(R) IN_RANGE_P (R, CR_FIRST, CR_LAST)
1109 #define CR_OR_PSEUDO_P(R) (CR_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
1112 /* Register Basics */
1114 /* Number of hardware registers known to the compiler. They receive numbers 0
1115 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
1116 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
1117 #define FIRST_PSEUDO_REGISTER (CR_LAST + 1)
1119 /* An initializer that says which registers are used for fixed purposes all
1120 throughout the compiled code and are therefore not available for general
1121 allocation. These would include the stack pointer, the frame pointer
1122 (except on machines where that can be used as a general register when no
1123 frame pointer is needed), the program counter on machines where that is
1124 considered one of the addressable registers, and any other numbered register
1125 with a standard use.
1127 This information is expressed as a sequence of numbers, separated by commas
1128 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
1131 The table initialized from this macro, and the table initialized by the
1132 following one, may be overridden at run time either automatically, by the
1133 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
1134 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
1135 #define FIXED_REGISTERS \
1137 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R0 - R15 */ \
1138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
1139 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
1140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
1142 0, 0, 0, 0, 1, 1, 1, 1, /* F0 - F7 */ \
1143 0, 0, /* A0 - A1 */ \
1144 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
1147 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
1148 general) by function calls as well as for fixed registers. This macro
1149 therefore identifies the registers that are not available for general
1150 allocation of values that must live across function calls.
1152 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
1153 saves it on function entry and restores it on function exit, if the register
1154 is used within the function. */
1155 #define CALL_USED_REGISTERS \
1157 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R0 - R15 */ \
1158 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
1159 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
1160 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
1162 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - F7 */ \
1163 1, 0, /* A0 - A1 */ \
1164 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
1167 /* Zero or more C statements that may conditionally modify two variables
1168 `fixed_regs' and `call_used_regs' (both of type `char []') after they have
1169 been initialized from the two preceding macros.
1171 This is necessary in case the fixed or call-clobbered registers depend on
1174 You need not define this macro if it has no work to do.
1176 If the usage of an entire class of registers depends on the target flags,
1177 you may indicate this to GCC by using this macro to modify `fixed_regs' and
1178 `call_used_regs' to 1 for each of the registers in the classes which should
1179 not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return
1180 `NO_REGS' if it is called with a letter for a class that shouldn't be used.
1182 (However, if this class is not included in `GENERAL_REGS' and all of the
1183 insn patterns whose constraints permit this class are controlled by target
1184 switches, then GCC will automatically avoid using these registers when the
1185 target switches are opposed to them.) */
1186 /* #define CONDITIONAL_REGISTER_USAGE */
1188 /* If this macro is defined and has a nonzero value, it means that `setjmp' and
1189 related functions fail to save the registers, or that `longjmp' fails to
1190 restore them. To compensate, the compiler avoids putting variables in
1191 registers in functions that use `setjmp'. */
1192 /* #define NON_SAVING_SETJMP */
1194 /* Define this macro if the target machine has register windows. This C
1195 expression returns the register number as seen by the called function
1196 corresponding to the register number OUT as seen by the calling function.
1197 Return OUT if register number OUT is not an outbound register. */
1198 /* #define INCOMING_REGNO(OUT) */
1200 /* Define this macro if the target machine has register windows. This C
1201 expression returns the register number as seen by the calling function
1202 corresponding to the register number IN as seen by the called function.
1203 Return IN if register number IN is not an inbound register. */
1204 /* #define OUTGOING_REGNO(IN) */
1207 /* Order of allocation of registers */
1209 /* If defined, an initializer for a vector of integers, containing the numbers
1210 of hard registers in the order in which GNU CC should prefer to use them
1211 (from most preferred to least).
1213 If this macro is not defined, registers are used lowest numbered first (all
1216 One use of this macro is on machines where the highest numbered registers
1217 must always be saved and the save-multiple-registers instruction supports
1218 only sequences of consecutive registers. On such machines, define
1219 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
1220 allocatable register first. */
1222 #define REG_ALLOC_ORDER \
1224 /* volatile registers */ \
1225 GPR_FIRST + 2, GPR_FIRST + 3, GPR_FIRST + 4, GPR_FIRST + 5, \
1226 GPR_FIRST + 6, GPR_FIRST + 7, GPR_FIRST + 8, GPR_FIRST + 9, \
1227 GPR_FIRST + 10, GPR_FIRST + 11, GPR_FIRST + 12, GPR_FIRST + 13, \
1228 GPR_FIRST + 14, GPR_FIRST + 15, GPR_FIRST + 16, GPR_FIRST + 17, \
1229 GPR_FIRST + 18, GPR_FIRST + 19, GPR_FIRST + 20, GPR_FIRST + 21, \
1230 GPR_FIRST + 22, GPR_FIRST + 23, GPR_FIRST + 24, GPR_FIRST + 25, \
1233 /* saved registers */ \
1234 GPR_FIRST + 34, GPR_FIRST + 35, GPR_FIRST + 36, GPR_FIRST + 37, \
1235 GPR_FIRST + 38, GPR_FIRST + 39, GPR_FIRST + 40, GPR_FIRST + 41, \
1236 GPR_FIRST + 42, GPR_FIRST + 43, GPR_FIRST + 44, GPR_FIRST + 45, \
1237 GPR_FIRST + 46, GPR_FIRST + 47, GPR_FIRST + 48, GPR_FIRST + 49, \
1238 GPR_FIRST + 50, GPR_FIRST + 51, GPR_FIRST + 52, GPR_FIRST + 53, \
1239 GPR_FIRST + 54, GPR_FIRST + 55, GPR_FIRST + 56, GPR_FIRST + 57, \
1240 GPR_FIRST + 58, GPR_FIRST + 59, GPR_FIRST + 60, GPR_FIRST + 61, \
1244 FLAG_F2, FLAG_F3, FLAG_F0, FLAG_F1, \
1245 FLAG_SAT, FLAG_OVERFLOW, FLAG_ACC_OVER, FLAG_CARRY, \
1248 ACCUM_FIRST + 0, ACCUM_FIRST + 1, \
1250 /* fixed registers */ \
1251 GPR_FIRST + 0, GPR_FIRST + 26, GPR_FIRST + 27, GPR_FIRST + 28, \
1252 GPR_FIRST + 29, GPR_FIRST + 30, GPR_FIRST + 31, GPR_FIRST + 32, \
1253 GPR_FIRST + 33, GPR_FIRST + 63, \
1254 CR_PSW, CR_BPSW, CR_PC, CR_BPC, \
1255 CR_DPSW, CR_DPC, CR_RPT_C, CR_RPT_S, \
1256 CR_RPT_E, CR_MOD_S, CR_MOD_E, CR_IBA, \
1257 CR_EIT_VB, CR_INT_S, CR_INT_M, \
1258 ARG_POINTER_REGNUM, \
1261 /* A C statement (sans semicolon) to choose the order in which to allocate hard
1262 registers for pseudo-registers local to a basic block.
1264 Store the desired register order in the array `reg_alloc_order'. Element 0
1265 should be the register to allocate first; element 1, the next register; and
1268 The macro body should not assume anything about the contents of
1269 `reg_alloc_order' before execution of the macro.
1271 On most machines, it is not necessary to define this macro. */
1272 /* #define ORDER_REGS_FOR_LOCAL_ALLOC */
1275 /* How Values Fit in Registers */
1277 /* A C expression for the number of consecutive hard registers, starting at
1278 register number REGNO, required to hold a value of mode MODE.
1280 On a machine where all registers are exactly one word, a suitable definition
1283 #define HARD_REGNO_NREGS(REGNO, MODE) \
1284 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1285 / UNITS_PER_WORD)) */
1287 #define HARD_REGNO_NREGS(REGNO, MODE) \
1288 (ACCUM_P (REGNO) ? ((GET_MODE_SIZE (MODE) + 2*UNITS_PER_WORD - 1) \
1289 / (2*UNITS_PER_WORD)) \
1290 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1293 /* A C expression that is nonzero if it is permissible to store a value of mode
1294 MODE in hard register number REGNO (or in several registers starting with
1295 that one). For a machine where all registers are equivalent, a suitable
1298 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
1300 It is not necessary for this macro to check for the numbers of fixed
1301 registers, because the allocation mechanism considers them to be always
1304 On some machines, double-precision values must be kept in even/odd register
1305 pairs. The way to implement that is to define this macro to reject odd
1306 register numbers for such modes.
1308 The minimum requirement for a mode to be OK in a register is that the
1309 `movMODE' instruction pattern support moves between the register and any
1310 other hard register for which the mode is OK; and that moving a value into
1311 the register and back out not alter it.
1313 Since the same instruction used to move `SImode' will work for all narrower
1314 integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK'
1315 to distinguish between these modes, provided you define patterns `movhi',
1316 etc., to take advantage of this. This is useful because of the interaction
1317 between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for
1318 all integer modes to be tieable.
1320 Many machines have special registers for floating point arithmetic. Often
1321 people assume that floating point machine modes are allowed only in floating
1322 point registers. This is not true. Any registers that can hold integers
1323 can safely *hold* a floating point machine mode, whether or not floating
1324 arithmetic can be done on it in those registers. Integer move instructions
1325 can be used to move the values.
1327 On some machines, though, the converse is true: fixed-point machine modes
1328 may not go in floating registers. This is true if the floating registers
1329 normalize any value stored in them, because storing a non-floating value
1330 there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject
1331 fixed-point machine modes in floating registers. But if the floating
1332 registers do not automatically normalize, if you can store any bit pattern
1333 in one and retrieve it unchanged without a trap, then any machine mode may
1334 go in a floating register, so you can define this macro to say so.
1336 The primary significance of special floating registers is rather that they
1337 are the registers acceptable in floating point arithmetic instructions.
1338 However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by
1339 writing the proper constraints for those instructions.
1341 On some machines, the floating registers are especially slow to access, so
1342 that it is better to store a value in a stack frame than in such a register
1343 if floating point arithmetic is not being done. As long as the floating
1344 registers are not in class `GENERAL_REGS', they will not be used unless some
1345 pattern's constraint asks for one. */
1347 extern unsigned char hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
1348 #define HARD_REGNO_MODE_OK(REGNO, MODE) hard_regno_mode_ok[ (int)MODE ][ REGNO ]
1350 /* A C expression that is nonzero if it is desirable to choose register
1351 allocation so as to avoid move instructions between a value of mode MODE1
1352 and a value of mode MODE2.
1354 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
1355 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
1358 extern unsigned char modes_tieable_p[];
1359 #define MODES_TIEABLE_P(MODE1, MODE2) \
1360 modes_tieable_p[ (((int)(MODE1)) * (NUM_MACHINE_MODES)) + (int)(MODE2) ]
1362 /* Define this macro if the compiler should avoid copies to/from CCmode
1363 registers. You should only define this macro if support fo copying to/from
1364 CCmode is incomplete. */
1366 /* On the D30V, copying to/from CCmode is complete, but since there are only
1367 two CC registers usable for conditional tests, this helps gcse not compound
1368 the reload problem. */
1369 #define AVOID_CCMODE_COPIES
1372 /* Handling Leaf Functions */
1374 /* A C initializer for a vector, indexed by hard register number, which
1375 contains 1 for a register that is allowable in a candidate for leaf function
1378 If leaf function treatment involves renumbering the registers, then the
1379 registers marked here should be the ones before renumbering--those that GNU
1380 CC would ordinarily allocate. The registers which will actually be used in
1381 the assembler code, after renumbering, should not be marked with 1 in this
1384 Define this macro only if the target machine offers a way to optimize the
1385 treatment of leaf functions. */
1386 /* #define LEAF_REGISTERS */
1388 /* A C expression whose value is the register number to which REGNO should be
1389 renumbered, when a function is treated as a leaf function.
1391 If REGNO is a register number which should not appear in a leaf function
1392 before renumbering, then the expression should yield -1, which will cause
1393 the compiler to abort.
1395 Define this macro only if the target machine offers a way to optimize the
1396 treatment of leaf functions, and registers need to be renumbered to do this. */
1397 /* #define LEAF_REG_REMAP(REGNO) */
1400 /* Registers That Form a Stack. */
1402 /* Define this if the machine has any stack-like registers. */
1403 /* #define STACK_REGS */
1405 /* The number of the first stack-like register. This one is the top
1407 /* #define FIRST_STACK_REG */
1409 /* The number of the last stack-like register. This one is the
1410 bottom of the stack. */
1411 /* #define LAST_STACK_REG */
1414 /* Register Classes */
1416 /* An enumeral type that must be defined with all the register class names as
1417 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
1418 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
1419 which is not a register class but rather tells how many classes there are.
1421 Each register class has a number, which is the value of casting the class
1422 name to type `int'. The number serves as an index in many of the tables
1441 #define GENERAL_REGS GPR_REGS
1443 /* The number of distinct register classes, defined as follows:
1445 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
1446 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
1448 /* An initializer containing the names of the register classes as C string
1449 constants. These names are used in writing some of the debugging dumps. */
1450 #define REG_CLASS_NAMES \
1456 "OTHER_FLAG_REGS", \
1466 /* Create mask bits for 3rd word of REG_CLASS_CONTENTS */
1467 #define MASK_WORD3(REG) ((long)1 << ((REG) - 64))
1470 #define REPEAT_MASK MASK_WORD3 (CR_RPT_C)
1471 #define CR_MASK (MASK_WORD3 (CR_PSW) | MASK_WORD3 (CR_BPSW) \
1472 | MASK_WORD3 (CR_PC) | MASK_WORD3 (CR_BPC) \
1473 | MASK_WORD3 (CR_DPSW) | MASK_WORD3 (CR_DPC) \
1474 | MASK_WORD3 (CR_RPT_C) | MASK_WORD3 (CR_RPT_S) \
1475 | MASK_WORD3 (CR_RPT_E) | MASK_WORD3 (CR_MOD_S) \
1476 | MASK_WORD3 (CR_MOD_E) | MASK_WORD3 (CR_IBA) \
1477 | MASK_WORD3 (CR_EIT_VB) | MASK_WORD3 (CR_INT_S) \
1478 | MASK_WORD3 (CR_INT_M))
1480 #define ACCUM_MASK (MASK_WORD3 (ACCUM_A0) | MASK_WORD3 (ACCUM_A1))
1481 #define OTHER_FLAG_MASK (MASK_WORD3 (FLAG_F2) | MASK_WORD3 (FLAG_F3) \
1482 | MASK_WORD3 (FLAG_SAT) | MASK_WORD3 (FLAG_OVERFLOW) \
1483 | MASK_WORD3 (FLAG_ACC_OVER) | MASK_WORD3 (FLAG_CARRY))
1485 #define F0_MASK MASK_WORD3 (FLAG_F0)
1486 #define F1_MASK MASK_WORD3 (FLAG_F1)
1487 #define BR_FLAG_MASK (F0_MASK | F1_MASK)
1488 #define FLAG_MASK (BR_FLAG_MASK | OTHER_FLAG_MASK)
1489 #define SPECIAL_MASK MASK_WORD3 (ARG_POINTER_REGNUM)
1491 #define ALL_MASK (CR_MASK | ACCUM_MASK | FLAG_MASK | SPECIAL_MASK)
1493 /* An initializer containing the contents of the register classes, as integers
1494 which are bit masks. The Nth integer specifies the contents of class N.
1495 The way the integer MASK is interpreted is that register R is in the class
1496 if `MASK & (1 << R)' is 1.
1498 When the machine has more than 32 registers, an integer does not suffice.
1499 Then the integers are replaced by sub-initializers, braced groupings
1500 containing several integers. Each sub-initializer must be suitable as an
1501 initializer for the type `HARD_REG_SET' which is defined in
1502 `hard-reg-set.h'. */
1503 #define REG_CLASS_CONTENTS \
1505 { 0x00000000, 0x00000000, NO_MASK }, /* NO_REGS */ \
1506 { 0x00000000, 0x00000000, REPEAT_MASK }, /* REPEAT_REGS */ \
1507 { 0x00000000, 0x00000000, CR_MASK }, /* CR_REGS */ \
1508 { 0x00000000, 0x00000000, ACCUM_MASK }, /* ACCUM_REGS */ \
1509 { 0x00000000, 0x00000000, OTHER_FLAG_MASK }, /* OTHER_FLAG_REGS */ \
1510 { 0x00000000, 0x00000000, F0_MASK }, /* F0_REGS */ \
1511 { 0x00000000, 0x00000000, F1_MASK }, /* F1_REGS */ \
1512 { 0x00000000, 0x00000000, BR_FLAG_MASK }, /* BR_FLAG_REGS */ \
1513 { 0x00000000, 0x00000000, FLAG_MASK }, /* FLAG_REGS */ \
1514 { 0xfffffffc, 0x3fffffff, NO_MASK }, /* EVEN_REGS */ \
1515 { 0xffffffff, 0xffffffff, SPECIAL_MASK }, /* GPR_REGS */ \
1516 { 0xffffffff, 0xffffffff, ALL_MASK }, /* ALL_REGS */ \
1519 /* A C expression whose value is a register class containing hard register
1520 REGNO. In general there is more than one such class; choose a class which
1521 is "minimal", meaning that no smaller class also contains the register. */
1523 extern enum reg_class regno_reg_class[];
1524 #define REGNO_REG_CLASS(REGNO) regno_reg_class[ (REGNO) ]
1526 /* A macro whose definition is the name of the class to which a valid base
1527 register must belong. A base register is one used in an address which is
1528 the register value plus a displacement. */
1529 #define BASE_REG_CLASS GPR_REGS
1531 /* A macro whose definition is the name of the class to which a valid index
1532 register must belong. An index register is one used in an address where its
1533 value is either multiplied by a scale factor or added to another register
1534 (as well as added to a displacement). */
1535 #define INDEX_REG_CLASS GPR_REGS
1537 /* A C expression which defines the machine-dependent operand constraint
1538 letters for register classes. If CHAR is such a letter, the value should be
1539 the register class corresponding to it. Otherwise, the value should be
1540 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
1541 will not be passed to this macro; you do not need to handle it.
1543 The following letters are unavailable, due to being used as
1548 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
1549 'Q', 'R', 'S', 'T', 'U'
1551 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
1553 extern enum reg_class reg_class_from_letter[];
1554 #define REG_CLASS_FROM_LETTER(CHAR) reg_class_from_letter[ CHAR ]
1556 /* A C expression which is nonzero if register number NUM is suitable for use
1557 as a base register in operand addresses. It may be either a suitable hard
1558 register or a pseudo register that has been allocated such a hard register. */
1560 #define REGNO_OK_FOR_BASE_P(NUM) \
1561 ((NUM) < FIRST_PSEUDO_REGISTER \
1563 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
1566 /* A C expression which is nonzero if register number NUM is suitable for use
1567 as an index register in operand addresses. It may be either a suitable hard
1568 register or a pseudo register that has been allocated such a hard register.
1570 The difference between an index register and a base register is that the
1571 index register may be scaled. If an address involves the sum of two
1572 registers, neither one of them scaled, then either one may be labeled the
1573 "base" and the other the "index"; but whichever labeling is used must fit
1574 the machine's constraints of which registers may serve in each capacity.
1575 The compiler will try both labelings, looking for one that is valid, and
1576 will reload one or both registers only if neither labeling works. */
1578 #define REGNO_OK_FOR_INDEX_P(NUM) \
1579 ((NUM) < FIRST_PSEUDO_REGISTER \
1581 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
1583 /* A C expression that places additional restrictions on the register class to
1584 use when it is necessary to copy value X into a register in class CLASS.
1585 The value is a register class; perhaps CLASS, or perhaps another, smaller
1586 class. On many machines, the following definition is safe:
1588 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
1590 Sometimes returning a more restrictive class makes better code. For
1591 example, on the 68000, when X is an integer constant that is in range for a
1592 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
1593 as CLASS includes the data registers. Requiring a data register guarantees
1594 that a `moveq' will be used.
1596 If X is a `const_double', by returning `NO_REGS' you can force X into a
1597 memory constant. This is useful on certain machines where immediate
1598 floating values cannot be loaded into certain kinds of registers. */
1599 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
1601 /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input
1602 reloads. If you don't define this macro, the default is to use CLASS,
1604 /* #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) */
1606 /* A C expression that places additional restrictions on the register class to
1607 use when it is necessary to be able to hold a value of mode MODE in a reload
1608 register for which class CLASS would ordinarily be used.
1610 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are
1611 certain modes that simply can't go in certain reload classes.
1613 The value is a register class; perhaps CLASS, or perhaps another, smaller
1616 Don't define this macro unless the target machine has limitations which
1617 require the macro to do something nontrivial. */
1618 /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */
1620 /* Many machines have some registers that cannot be copied directly to or from
1621 memory or even from other types of registers. An example is the `MQ'
1622 register, which on most machines, can only be copied to or from general
1623 registers, but not memory. Some machines allow copying all registers to and
1624 from memory, but require a scratch register for stores to some memory
1625 locations (e.g., those with symbolic address on the RT, and those with
1626 certain symbolic address on the Sparc when compiling PIC). In some cases,
1627 both an intermediate and a scratch register are required.
1629 You should define these macros to indicate to the reload phase that it may
1630 need to allocate at least one register for a reload in addition to the
1631 register to contain the data. Specifically, if copying X to a register
1632 CLASS in MODE requires an intermediate register, you should define
1633 `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of
1634 whose registers can be used as intermediate registers or scratch registers.
1636 If copying a register CLASS in MODE to X requires an intermediate or scratch
1637 register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the
1638 largest register class required. If the requirements for input and output
1639 reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used
1640 instead of defining both macros identically.
1642 The values returned by these macros are often `GENERAL_REGS'. Return
1643 `NO_REGS' if no spare register is needed; i.e., if X can be directly copied
1644 to or from a register of CLASS in MODE without requiring a scratch register.
1645 Do not define this macro if it would always return `NO_REGS'.
1647 If a scratch register is required (either with or without an intermediate
1648 register), you should define patterns for `reload_inM' or `reload_outM', as
1649 required (*note Standard Names::.. These patterns, which will normally be
1650 implemented with a `define_expand', should be similar to the `movM'
1651 patterns, except that operand 2 is the scratch register.
1653 Define constraints for the reload register and scratch register that contain
1654 a single register class. If the original reload register (whose class is
1655 CLASS) can meet the constraint given in the pattern, the value returned by
1656 these macros is used for the class of the scratch register. Otherwise, two
1657 additional reload registers are required. Their classes are obtained from
1658 the constraints in the insn pattern.
1660 X might be a pseudo-register or a `subreg' of a pseudo-register, which could
1661 either be in a hard register or in memory. Use `true_regnum' to find out;
1662 it will return -1 if the pseudo is in memory and the hard register number if
1663 it is in a register.
1665 These macros should not be used in the case where a particular class of
1666 registers can only be copied to memory and not to another class of
1667 registers. In that case, secondary reload registers are not needed and
1668 would not be helpful. Instead, a stack location must be used to perform the
1669 copy and the `movM' pattern should use memory as a intermediate storage.
1670 This case often occurs between floating-point and general registers. */
1672 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
1673 ((CLASS) == GPR_REGS ? NO_REGS \
1674 : (CLASS) == EVEN_REGS ? NO_REGS \
1675 : (CLASS) == ACCUM_REGS ? EVEN_REGS \
1678 /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */
1679 /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */
1681 /* Certain machines have the property that some registers cannot be copied to
1682 some other registers without using memory. Define this macro on those
1683 machines to be a C expression that is non-zero if objects of mode M in
1684 registers of CLASS1 can only be copied to registers of class CLASS2 by
1685 storing a register of CLASS1 into memory and loading that memory location
1686 into a register of CLASS2.
1688 Do not define this macro if its value would always be zero. */
1689 /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */
1691 /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a
1692 stack slot for a memory location needed for register copies. If this macro
1693 is defined, the compiler instead uses the memory location defined by this
1696 Do not define this macro if you do not define
1697 `SECONDARY_MEMORY_NEEDED'. */
1698 /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */
1700 /* When the compiler needs a secondary memory location to copy between two
1701 registers of mode MODE, it normally allocates sufficient memory to hold a
1702 quantity of `BITS_PER_WORD' bits and performs the store and load operations
1703 in a mode that many bits wide and whose class is the same as that of MODE.
1705 This is right thing to do on most machines because it ensures that all bits
1706 of the register are copied and prevents accesses to the registers in a
1707 narrower mode, which some machines prohibit for floating-point registers.
1709 However, this default behavior is not correct on some machines, such as the
1710 DEC Alpha, that store short integers in floating-point registers differently
1711 than in integer registers. On those machines, the default widening will not
1712 work correctly and you must define this macro to suppress that widening in
1713 some cases. See the file `alpha.h' for details.
1715 Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or
1716 if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for
1718 /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */
1720 /* Normally the compiler avoids choosing registers that have been explicitly
1721 mentioned in the rtl as spill registers (these registers are normally those
1722 used to pass parameters and return values). However, some machines have so
1723 few registers of certain classes that there would not be enough registers to
1724 use as spill registers if this were done.
1726 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero value on
1727 these machines. When this macro has a non-zero value, the compiler allows
1728 registers explicitly used in the rtl to be used as spill registers but
1729 avoids extending the lifetime of these registers.
1731 It is always safe to define this macro with a non-zero value, but if you
1732 unnecessarily define it, you will reduce the amount of optimizations that
1733 can be performed in some cases. If you do not define this macro with a
1734 non-zero value when it is required, the compiler will run out of spill
1735 registers and print a fatal error message. For most machines, you should
1736 not define this macro at all. */
1737 /* #define SMALL_REGISTER_CLASSES */
1739 /* A C expression whose value is nonzero if pseudos that have been assigned to
1740 registers of class CLASS would likely be spilled because registers of CLASS
1741 are needed for spill registers.
1743 The default value of this macro returns 1 if CLASS has exactly one register
1744 and zero otherwise. On most machines, this default should be used. Only
1745 define this macro to some other expression if pseudo allocated by
1746 `local-alloc.c' end up in memory because their hard registers were needed
1747 for spill registers. If this macro returns nonzero for those classes, those
1748 pseudos will only be allocated by `global.c', which knows how to reallocate
1749 the pseudo to another register. If there would not be another register
1750 available for reallocation, you should not change the definition of this
1751 macro since the only effect of such a definition would be to slow down
1752 register allocation. */
1753 #define CLASS_LIKELY_SPILLED_P(CLASS) \
1754 ((CLASS) != GPR_REGS && (CLASS) != EVEN_REGS)
1756 /* A C expression for the maximum number of consecutive registers of
1757 class CLASS needed to hold a value of mode MODE.
1759 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
1760 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
1761 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
1763 This macro helps control the handling of multiple-word values in
1766 #define CLASS_MAX_NREGS(CLASS, MODE) \
1767 (((CLASS) == ACCUM_REGS) \
1768 ? ((GET_MODE_SIZE (MODE) + 8 - 1) / 8) \
1769 : ((GET_MODE_SIZE (MODE) + 4 - 1) / 4))
1771 /* A C expression that defines the machine-dependent operand constraint letters
1772 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
1773 If C is one of those letters, the expression should check that VALUE, an
1774 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
1775 is not one of those letters, the value should be 0 regardless of VALUE. */
1776 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1777 ((C) == 'I' ? IN_RANGE_P (VALUE, -32, 31) \
1778 : (C) == 'J' ? IN_RANGE_P (VALUE, 0, 31) \
1779 : (C) == 'K' ? IN_RANGE_P (exact_log2 (VALUE), 0, 31) \
1780 : (C) == 'L' ? IN_RANGE_P (exact_log2 (~ (VALUE)), 0, 31) \
1781 : (C) == 'M' ? ((VALUE) == 32) \
1782 : (C) == 'N' ? ((VALUE) == 1) \
1783 : (C) == 'O' ? ((VALUE) == 0) \
1784 : (C) == 'P' ? IN_RANGE_P (VALUE, 32, 63) \
1787 /* A C expression that defines the machine-dependent operand constraint letters
1788 (`G', `H') that specify particular ranges of `const_double' values.
1790 If C is one of those letters, the expression should check that VALUE, an RTX
1791 of code `const_double', is in the appropriate range and return 1 if so, 0
1792 otherwise. If C is not one of those letters, the value should be 0
1793 regardless of VALUE.
1795 `const_double' is used for all floating-point constants and for `DImode'
1796 fixed-point constants. A given letter can accept either or both kinds of
1797 values. It can use `GET_MODE' to distinguish between these kinds. */
1798 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
1799 ((C) == 'G' ? (CONST_DOUBLE_LOW (VALUE) == 0 \
1800 && CONST_DOUBLE_HIGH (VALUE) == 0) \
1801 : (C) == 'H' ? FALSE \
1804 /* A C expression that defines the optional machine-dependent constraint
1805 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
1806 types of operands, usually memory references, for the target machine.
1807 Normally this macro will not be defined. If it is required for a particular
1808 target machine, it should return 1 if VALUE corresponds to the operand type
1809 represented by the constraint letter C. If C is not defined as an extra
1810 constraint, the value returned should be 0 regardless of VALUE.
1812 For example, on the ROMP, load instructions cannot have their output in r0
1813 if the memory reference contains a symbolic address. Constraint letter `Q'
1814 is defined as representing a memory address that does *not* contain a
1815 symbolic address. An alternative is specified with a `Q' constraint on the
1816 input and `r' on the output. The next alternative specifies `m' on the
1817 input and a register class that does not include r0 on the output. */
1819 #define EXTRA_CONSTRAINT(VALUE, C) \
1820 (((C) == 'Q') ? short_memory_operand ((VALUE), GET_MODE (VALUE)) \
1821 : ((C) == 'R') ? single_reg_memory_operand ((VALUE), GET_MODE (VALUE)) \
1822 : ((C) == 'S') ? const_addr_memory_operand ((VALUE), GET_MODE (VALUE)) \
1823 : ((C) == 'T') ? long_memory_operand ((VALUE), GET_MODE (VALUE)) \
1824 : ((C) == 'U') ? FALSE \
1828 /* Basic Stack Layout */
1832 /* Structure used to define the d30v stack */
1833 typedef struct d30v_stack {
1834 int varargs_p; /* whether this is a varargs function */
1835 int varargs_size; /* size to hold varargs args passed in regs */
1836 int vars_size; /* variable save area size */
1837 int parm_size; /* outgoing parameter size */
1838 int gpr_size; /* size of saved GPR registers */
1839 int accum_size; /* size of saved ACCUM registers */
1840 int total_size; /* total bytes allocated for stack */
1841 /* which registers are to be saved */
1842 int save_offset; /* offset from new sp to start saving vars at */
1843 int link_offset; /* offset r62 is saved at */
1844 int memrefs_varargs; /* # of 2 word memory references for varargs */
1845 int memrefs_2words; /* # of 2 word memory references */
1846 int memrefs_1word; /* # of 1 word memory references */
1847 /* 1 for ldw/stw ops; 2 for ld2w/st2w ops */
1848 unsigned char save_p[FIRST_PSEUDO_REGISTER];
1851 /* Define this macro if pushing a word onto the stack moves the stack pointer
1852 to a smaller address.
1854 When we say, "define this macro if ...," it means that the compiler checks
1855 this macro only with `#ifdef' so the precise definition used does not
1857 #define STACK_GROWS_DOWNWARD 1
1859 /* Define this macro if the addresses of local variable slots are at negative
1860 offsets from the frame pointer. */
1861 /* #define FRAME_GROWS_DOWNWARD */
1863 /* Define this macro if successive arguments to a function occupy decreasing
1864 addresses on the stack. */
1865 /* #define ARGS_GROW_DOWNWARD */
1867 /* Offset from the frame pointer to the first local variable slot to be
1870 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the
1871 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by
1872 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */
1874 #define STARTING_FRAME_OFFSET \
1875 (D30V_ALIGN (current_function_outgoing_args_size, \
1876 (STACK_BOUNDARY / BITS_PER_UNIT)))
1878 /* Offset from the stack pointer register to the first location at which
1879 outgoing arguments are placed. If not specified, the default value of zero
1880 is used. This is the proper value for most machines.
1882 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1883 location at which outgoing arguments are placed. */
1884 /* #define STACK_POINTER_OFFSET */
1886 /* Offset from the argument pointer register to the first argument's address.
1887 On some machines it may depend on the data type of the function.
1889 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1890 argument's address. */
1891 #define FIRST_PARM_OFFSET(FUNDECL) 0
1893 /* Offset from the stack pointer register to an item dynamically allocated on
1894 the stack, e.g., by `alloca'.
1896 The default value for this macro is `STACK_POINTER_OFFSET' plus the length
1897 of the outgoing arguments. The default is correct for most machines. See
1898 `function.c' for details. */
1899 /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */
1901 /* A C expression whose value is RTL representing the address in a stack frame
1902 where the pointer to the caller's frame is stored. Assume that FRAMEADDR is
1903 an RTL expression for the address of the stack frame itself.
1905 If you don't define this macro, the default is to return the value of
1906 FRAMEADDR--that is, the stack frame address is also the address of the stack
1907 word that points to the previous frame. */
1908 /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */
1910 /* If defined, a C expression that produces the machine-specific code to setup
1911 the stack so that arbitrary frames can be accessed. For example, on the
1912 Sparc, we must flush all of the register windows to the stack before we can
1913 access arbitrary stack frames. This macro will seldom need to be defined. */
1914 /* #define SETUP_FRAME_ADDRESSES() */
1916 /* A C expression whose value is RTL representing the value of the return
1917 address for the frame COUNT steps up from the current frame, after the
1918 prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame
1919 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is
1922 The value of the expression must always be the correct address when COUNT is
1923 zero, but may be `NULL_RTX' if there is not way to determine the return
1924 address of other frames. */
1926 /* ??? This definition fails for leaf functions. There is currently no
1927 general solution for this problem. */
1929 /* ??? There appears to be no way to get the return address of any previous
1930 frame except by disassembling instructions in the prologue/epilogue.
1931 So currently we support only the current frame. */
1933 #define RETURN_ADDR_RTX(COUNT, FRAME) \
1934 ((COUNT) == 0 ? d30v_return_addr() : const0_rtx)
1936 /* Define this if the return address of a particular stack frame is
1937 accessed from the frame pointer of the previous stack frame. */
1938 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1940 /* A C expression whose value is RTL representing the location of the incoming
1941 return address at the beginning of any function, before the prologue. This
1942 RTL is either a `REG', indicating that the return value is saved in `REG',
1943 or a `MEM' representing a location in the stack.
1945 You only need to define this macro if you want to support call frame
1946 debugging information like that provided by DWARF 2. */
1948 /* Before the prologue, RA lives in r62. */
1949 #define INCOMING_RETURN_ADDR_RTX gen_rtx (REG, Pmode, GPR_LINK)
1951 /* A C expression whose value is an integer giving the offset, in bytes, from
1952 the value of the stack pointer register to the top of the stack frame at the
1953 beginning of any function, before the prologue. The top of the frame is
1954 defined to be the value of the stack pointer in the previous frame, just
1955 before the call instruction.
1957 You only need to define this macro if you want to support call frame
1958 debugging information like that provided by DWARF 2. */
1959 #define INCOMING_FRAME_SP_OFFSET 0
1961 /* Initialize data used by insn expanders. This is called from insn_emit,
1962 once for every function before code is generated. */
1964 #define INIT_EXPANDERS d30v_init_expanders ()
1967 /* Stack Checking. */
1969 /* A nonzero value if stack checking is done by the configuration files in a
1970 machine-dependent manner. You should define this macro if stack checking is
1971 require by the ABI of your machine or if you would like to have to stack
1972 checking in some more efficient way than GNU CC's portable approach. The
1973 default value of this macro is zero. */
1974 /* #define STACK_CHECK_BUILTIN */
1976 /* An integer representing the interval at which GNU CC must generate stack
1977 probe instructions. You will normally define this macro to be no larger
1978 than the size of the "guard pages" at the end of a stack area. The default
1979 value of 4096 is suitable for most systems. */
1980 /* #define STACK_CHECK_PROBE_INTERVAL */
1982 /* A integer which is nonzero if GNU CC should perform the stack probe as a
1983 load instruction and zero if GNU CC should use a store instruction. The
1984 default is zero, which is the most efficient choice on most systems. */
1985 /* #define STACK_CHECK_PROBE_LOAD */
1987 /* The number of bytes of stack needed to recover from a stack overflow, for
1988 languages where such a recovery is supported. The default value of 75 words
1989 should be adequate for most machines. */
1990 /* #define STACK_CHECK_PROTECT */
1992 /* The maximum size of a stack frame, in bytes. GNU CC will generate probe
1993 instructions in non-leaf functions to ensure at least this many bytes of
1994 stack are available. If a stack frame is larger than this size, stack
1995 checking will not be reliable and GNU CC will issue a warning. The default
1996 is chosen so that GNU CC only generates one instruction on most systems.
1997 You should normally not change the default value of this macro. */
1998 /* #define STACK_CHECK_MAX_FRAME_SIZE */
2000 /* GNU CC uses this value to generate the above warning message. It represents
2001 the amount of fixed frame used by a function, not including space for any
2002 callee-saved registers, temporaries and user variables. You need only
2003 specify an upper bound for this amount and will normally use the default of
2005 /* #define STACK_CHECK_FIXED_FRAME_SIZE */
2007 /* The maximum size, in bytes, of an object that GNU CC will place in the fixed
2008 area of the stack frame when the user specifies `-fstack-check'. GNU CC
2009 computed the default from the values of the above macros and you will
2010 normally not need to override that default. */
2011 /* #define STACK_CHECK_MAX_VAR_SIZE */
2014 /* Register That Address the Stack Frame. */
2016 /* The register number of the stack pointer register, which must also be a
2017 fixed register according to `FIXED_REGISTERS'. On most machines, the
2018 hardware determines which register this is. */
2019 #define STACK_POINTER_REGNUM GPR_SP
2021 /* The register number of the frame pointer register, which is used to access
2022 automatic variables in the stack frame. On some machines, the hardware
2023 determines which register this is. On other machines, you can choose any
2024 register you wish for this purpose. */
2025 #define FRAME_POINTER_REGNUM GPR_FP
2027 /* On some machines the offset between the frame pointer and starting offset of
2028 the automatic variables is not known until after register allocation has
2029 been done (for example, because the saved registers are between these two
2030 locations). On those machines, define `FRAME_POINTER_REGNUM' the number of
2031 a special, fixed register to be used internally until the offset is known,
2032 and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
2033 used for the frame pointer.
2035 You should define this macro only in the very rare circumstances when it is
2036 not possible to calculate the offset between the frame pointer and the
2037 automatic variables until after register allocation has been completed.
2038 When this macro is defined, you must also indicate in your definition of
2039 `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either
2040 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
2042 Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */
2043 /* #define HARD_FRAME_POINTER_REGNUM */
2045 /* The register number of the arg pointer register, which is used to access the
2046 function's argument list. On some machines, this is the same as the frame
2047 pointer register. On some machines, the hardware determines which register
2048 this is. On other machines, you can choose any register you wish for this
2049 purpose. If this is not the same register as the frame pointer register,
2050 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
2051 arrange to be able to eliminate it (*note Elimination::.). */
2052 /* #define ARG_POINTER_REGNUM */
2054 /* The register number of the return address pointer register, which is used to
2055 access the current function's return address from the stack. On some
2056 machines, the return address is not at a fixed offset from the frame pointer
2057 or stack pointer or argument pointer. This register can be defined to point
2058 to the return address on the stack, and then be converted by
2059 `ELIMINABLE_REGS' into either the frame pointer or stack pointer.
2061 Do not define this macro unless there is no other way to get the return
2062 address from the stack. */
2063 /* #define RETURN_ADDRESS_POINTER_REGNUM */
2065 /* Register numbers used for passing a function's static chain pointer. If
2066 register windows are used, the register number as seen by the called
2067 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
2068 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
2069 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
2071 The static chain register need not be a fixed register.
2073 If the static chain is passed in memory, these macros should not be defined;
2074 instead, the next two macros should be defined. */
2076 #define STATIC_CHAIN_REGNUM (GPR_FIRST + 18)
2077 /* #define STATIC_CHAIN_INCOMING_REGNUM */
2079 /* If the static chain is passed in memory, these macros provide rtx giving
2080 `mem' expressions that denote where they are stored. `STATIC_CHAIN' and
2081 `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called
2082 functions, respectively. Often the former will be at an offset from the
2083 stack pointer and the latter at an offset from the frame pointer.
2085 The variables `stack_pointer_rtx', `frame_pointer_rtx', and
2086 `arg_pointer_rtx' will have been initialized prior to the use of these
2087 macros and should be used to refer to those items.
2089 If the static chain is passed in a register, the two previous
2090 macros should be defined instead. */
2091 /* #define STATIC_CHAIN */
2092 /* #define STATIC_CHAIN_INCOMING */
2095 /* Eliminating the Frame Pointer and the Arg Pointer */
2097 /* A C expression which is nonzero if a function must have and use a frame
2098 pointer. This expression is evaluated in the reload pass. If its value is
2099 nonzero the function will have a frame pointer.
2101 The expression can in principle examine the current function and decide
2102 according to the facts, but on most machines the constant 0 or the constant
2103 1 suffices. Use 0 when the machine allows code to be generated with no
2104 frame pointer, and doing so saves some time or space. Use 1 when there is
2105 no possible advantage to avoiding a frame pointer.
2107 In certain cases, the compiler does not know how to produce valid code
2108 without a frame pointer. The compiler recognizes those cases and
2109 automatically gives the function a frame pointer regardless of what
2110 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
2112 In a function that does not require a frame pointer, the frame pointer
2113 register can be allocated for ordinary usage, unless you mark it as a fixed
2114 register. See `FIXED_REGISTERS' for more information. */
2115 #define FRAME_POINTER_REQUIRED 0
2117 /* A C statement to store in the variable DEPTH-VAR the difference between the
2118 frame pointer and the stack pointer values immediately after the function
2119 prologue. The value would be computed from information such as the result
2120 of `get_frame_size ()' and the tables of registers `regs_ever_live' and
2123 If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not
2124 be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED'
2125 is defined to always be true; in that case, you may set DEPTH-VAR to
2127 /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */
2129 /* If defined, this macro specifies a table of register pairs used to eliminate
2130 unneeded registers that point into the stack frame. If it is not defined,
2131 the only elimination attempted by the compiler is to replace references to
2132 the frame pointer with references to the stack pointer.
2134 The definition of this macro is a list of structure initializations, each of
2135 which specifies an original and replacement register.
2137 On some machines, the position of the argument pointer is not known until
2138 the compilation is completed. In such a case, a separate hard register must
2139 be used for the argument pointer. This register can be eliminated by
2140 replacing it with either the frame pointer or the argument pointer,
2141 depending on whether or not the frame pointer has been eliminated.
2143 In this case, you might specify:
2144 #define ELIMINABLE_REGS \
2145 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2146 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
2147 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
2149 Note that the elimination of the argument pointer with the stack pointer is
2150 specified first since that is the preferred elimination. */
2151 #define ELIMINABLE_REGS \
2153 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
2154 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }, \
2155 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM } \
2158 /* A C expression that returns non-zero if the compiler is allowed to try to
2159 replace register number FROM-REG with register number TO-REG. This macro
2160 need only be defined if `ELIMINABLE_REGS' is defined, and will usually be
2161 the constant 1, since most of the cases preventing register elimination are
2162 things that the compiler already knows about. */
2164 #define CAN_ELIMINATE(FROM, TO) \
2165 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
2166 ? ! frame_pointer_needed \
2169 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
2170 initial difference between the specified pair of registers. This macro must
2171 be defined if `ELIMINABLE_REGS' is defined. */
2173 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
2175 d30v_stack_t *info = d30v_stack_info (); \
2177 if ((FROM) == FRAME_POINTER_REGNUM) \
2179 else if ((FROM) == ARG_POINTER_REGNUM) \
2180 (OFFSET) = info->total_size - current_function_pretend_args_size; \
2185 /* Define this macro if the `longjmp' function restores registers from the
2186 stack frames, rather than from those saved specifically by `setjmp'.
2187 Certain quantities must not be kept in registers across a call to `setjmp'
2188 on such machines. */
2189 /* #define LONGJMP_RESTORE_FROM_STACK */
2192 /* Passing Function Arguments on the Stack */
2194 /* Define this macro if an argument declared in a prototype as an integral type
2195 smaller than `int' should actually be passed as an `int'. In addition to
2196 avoiding errors in certain cases of mismatch, it also makes for better code
2197 on certain machines. */
2198 /* #define PROMOTE_PROTOTYPES */
2200 /* A C expression that is the number of bytes actually pushed onto the stack
2201 when an instruction attempts to push NPUSHED bytes.
2203 If the target machine does not have a push instruction, do not define this
2204 macro. That directs GNU CC to use an alternate strategy: to allocate the
2205 entire argument block and then store the arguments into it.
2207 On some machines, the definition
2209 #define PUSH_ROUNDING(BYTES) (BYTES)
2211 will suffice. But on other machines, instructions that appear to push one
2212 byte actually push two bytes in an attempt to maintain alignment. Then the
2213 definition should be
2215 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
2216 /* #define PUSH_ROUNDING(NPUSHED) */
2218 /* If defined, the maximum amount of space required for outgoing arguments will
2219 be computed and placed into the variable
2220 `current_function_outgoing_args_size'. No space will be pushed onto the
2221 stack for each call; instead, the function prologue should increase the
2222 stack frame size by this amount.
2224 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
2226 #define ACCUMULATE_OUTGOING_ARGS 1
2228 /* Define this macro if functions should assume that stack space has been
2229 allocated for arguments even when their values are passed in registers.
2231 The value of this macro is the size, in bytes, of the area reserved for
2232 arguments passed in registers for the function represented by FNDECL.
2234 This space can be allocated by the caller, or be a part of the
2235 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
2237 /* #define REG_PARM_STACK_SPACE(FNDECL) */
2239 /* Define these macros in addition to the one above if functions might allocate
2240 stack space for arguments even when their values are passed in registers.
2241 These should be used when the stack space allocated for arguments in
2242 registers is not a simple constant independent of the function declaration.
2244 The value of the first macro is the size, in bytes, of the area that we
2245 should initially assume would be reserved for arguments passed in registers.
2247 The value of the second macro is the actual size, in bytes, of the area that
2248 will be reserved for arguments passed in registers. This takes two
2249 arguments: an integer representing the number of bytes of fixed sized
2250 arguments on the stack, and a tree representing the number of bytes of
2251 variable sized arguments on the stack.
2253 When these macros are defined, `REG_PARM_STACK_SPACE' will only be called
2254 for libcall functions, the current function, or for a function being called
2255 when it is known that such stack space must be allocated. In each case this
2256 value can be easily computed.
2258 When deciding whether a called function needs such stack space, and how much
2259 space to reserve, GNU CC uses these two macros instead of
2260 `REG_PARM_STACK_SPACE'. */
2261 /* #define MAYBE_REG_PARM_STACK_SPACE */
2262 /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */
2264 /* Define this if it is the responsibility of the caller to allocate the area
2265 reserved for arguments passed in registers.
2267 If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the
2268 space for these arguments counts in the value of
2269 `current_function_outgoing_args_size'. */
2270 /* #define OUTGOING_REG_PARM_STACK_SPACE */
2272 /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack
2273 parameters don't skip the area specified by it.
2275 Normally, when a parameter is not passed in registers, it is placed on the
2276 stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro
2277 suppresses this behavior and causes the parameter to be passed on the stack
2278 in its natural location. */
2279 /* #define STACK_PARMS_IN_REG_PARM_AREA */
2281 /* A C expression that should indicate the number of bytes of its own arguments
2282 that a function pops on returning, or 0 if the function pops no arguments
2283 and the caller must therefore pop them all after the function returns.
2285 FUNDECL is a C variable whose value is a tree node that describes the
2286 function in question. Normally it is a node of type `FUNCTION_DECL' that
2287 describes the declaration of the function. From this it is possible to
2288 obtain the DECL_MACHINE_ATTRIBUTES of the function.
2290 FUNTYPE is a C variable whose value is a tree node that describes the
2291 function in question. Normally it is a node of type `FUNCTION_TYPE' that
2292 describes the data type of the function. From this it is possible to obtain
2293 the data types of the value and arguments (if known).
2295 When a call to a library function is being considered, FUNTYPE will contain
2296 an identifier node for the library function. Thus, if you need to
2297 distinguish among various library functions, you can do so by their names.
2298 Note that "library function" in this context means a function used to
2299 perform arithmetic, whose name is known specially in the compiler and was
2300 not mentioned in the C code being compiled.
2302 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
2303 variable number of bytes is passed, it is zero, and argument popping will
2304 always be the responsibility of the calling function.
2306 On the Vax, all functions always pop their arguments, so the definition of
2307 this macro is STACK-SIZE. On the 68000, using the standard calling
2308 convention, no functions pop their arguments, so the value of the macro is
2309 always 0 in this case. But an alternative calling convention is available
2310 in which functions that take a fixed number of arguments pop them but other
2311 functions (such as `printf') pop nothing (the caller pops all). When this
2312 convention is in use, FUNTYPE is examined to determine whether a function
2313 takes a fixed number of arguments. */
2314 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
2317 /* Function Arguments in Registers */
2319 /* A C expression that controls whether a function argument is passed in a
2320 register, and which register.
2322 The arguments are CUM, which summarizes all the previous arguments; MODE,
2323 the machine mode of the argument; TYPE, the data type of the argument as a
2324 tree node or 0 if that is not known (which happens for C support library
2325 functions); and NAMED, which is 1 for an ordinary argument and 0 for
2326 nameless arguments that correspond to `...' in the called function's
2329 The value of the expression should either be a `reg' RTX for the hard
2330 register in which to pass the argument, or zero to pass the argument on the
2333 For machines like the Vax and 68000, where normally all arguments are
2334 pushed, zero suffices as a definition.
2336 The usual way to make the ANSI library `stdarg.h' work on a machine where
2337 some arguments are usually passed in registers, is to cause nameless
2338 arguments to be passed on the stack instead. This is done by making
2339 `FUNCTION_ARG' return 0 whenever NAMED is 0.
2341 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
2342 this macro to determine if this argument is of a type that must be passed in
2343 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
2344 returns non-zero for such an argument, the compiler will abort. If
2345 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
2346 stack and then loaded into a register. */
2348 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
2349 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, FALSE)
2351 /* Define this macro if the target machine has "register windows", so that the
2352 register in which a function sees an arguments is not necessarily the same
2353 as the one in which the caller passed the argument.
2355 For such machines, `FUNCTION_ARG' computes the register in which the caller
2356 passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar
2357 fashion to tell the function being called where the arguments will arrive.
2359 If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both
2362 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
2363 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, TRUE)
2365 /* A C expression for the number of words, at the beginning of an argument,
2366 must be put in registers. The value must be zero for arguments that are
2367 passed entirely in registers or that are entirely pushed on the stack.
2369 On some machines, certain arguments must be passed partially in registers
2370 and partially in memory. On these machines, typically the first N words of
2371 arguments are passed in registers, and the rest on the stack. If a
2372 multi-word argument (a `double' or a structure) crosses that boundary, its
2373 first few words must be passed in registers and the rest must be pushed.
2374 This macro tells the compiler when this occurs, and how many of the words
2375 should go in registers.
2377 `FUNCTION_ARG' for these arguments should return the first register to be
2378 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
2379 the called function. */
2380 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
2381 d30v_function_arg_partial_nregs (&CUM, (int)MODE, TYPE, NAMED)
2383 /* A C expression that indicates when an argument must be passed by reference.
2384 If nonzero for an argument, a copy of that argument is made in memory and a
2385 pointer to the argument is passed instead of the argument itself. The
2386 pointer is passed in whatever way is appropriate for passing a pointer to
2389 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
2390 definition of this macro might be
2391 #define FUNCTION_ARG_PASS_BY_REFERENCE\
2392 (CUM, MODE, TYPE, NAMED) \
2393 MUST_PASS_IN_STACK (MODE, TYPE) */
2394 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0
2396 /* If defined, a C expression that indicates when it is the called function's
2397 responsibility to make a copy of arguments passed by invisible reference.
2398 Normally, the caller makes a copy and passes the address of the copy to the
2399 routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is
2400 nonzero, the caller does not make a copy. Instead, it passes a pointer to
2401 the "live" value. The called function must not modify this value. If it
2402 can be determined that the value won't be modified, it need not make a copy;
2403 otherwise a copy must be made. */
2404 /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */
2406 /* A C type for declaring a variable that is used as the first argument of
2407 `FUNCTION_ARG' and other related values. For some target machines, the type
2408 `int' suffices and can hold the number of bytes of argument so far.
2410 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
2411 that have been passed on the stack. The compiler has other variables to
2412 keep track of that. For target machines on which all arguments are passed
2413 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
2414 however, the data structure must exist and should not be empty, so use
2416 typedef int CUMULATIVE_ARGS;
2418 /* A C statement (sans semicolon) for initializing the variable CUM for the
2419 state at the beginning of the argument list. The variable has type
2420 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
2421 of the function which will receive the args, or 0 if the args are to a
2422 compiler support library function. The value of INDIRECT is nonzero when
2423 processing an indirect call, for example a call through a function pointer.
2424 The value of INDIRECT is zero for a call to an explicitly named function, a
2425 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
2426 arguments for the function being compiled.
2428 When processing a call to a compiler support library function, LIBNAME
2429 identifies which one. It is a `symbol_ref' rtx which contains the name of
2430 the function, as a string. LIBNAME is 0 when an ordinary C function call is
2431 being processed. Thus, each time this macro is called, either LIBNAME or
2432 FNTYPE is nonzero, but never both of them at once. */
2434 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
2435 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, INDIRECT, FALSE)
2437 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
2438 arguments for the function being compiled. If this macro is undefined,
2439 `INIT_CUMULATIVE_ARGS' is used instead.
2441 The value passed for LIBNAME is always 0, since library routines with
2442 special calling conventions are never compiled with GNU CC. The argument
2443 LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */
2445 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
2446 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, FALSE, TRUE)
2448 /* A C statement (sans semicolon) to update the summarizer variable CUM to
2449 advance past an argument in the argument list. The values MODE, TYPE and
2450 NAMED describe that argument. Once this is done, the variable CUM is
2451 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
2453 This macro need not do anything if the argument in question was passed on
2454 the stack. The compiler knows how to track the amount of stack space used
2455 for arguments without any special help. */
2457 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
2458 d30v_function_arg_advance (&CUM, (int) MODE, TYPE, NAMED)
2460 /* If defined, a C expression which determines whether, and in which direction,
2461 to pad out an argument with extra space. The value should be of type `enum
2462 direction': either `upward' to pad above the argument, `downward' to pad
2463 below, or `none' to inhibit padding.
2465 The *amount* of padding is always just enough to reach the next multiple of
2466 `FUNCTION_ARG_BOUNDARY'; this macro does not control it.
2468 This macro has a default definition which is right for most systems. For
2469 little-endian machines, the default is to pad upward. For big-endian
2470 machines, the default is to pad downward for an argument of constant size
2471 shorter than an `int', and upward otherwise. */
2472 /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */
2474 /* If defined, a C expression that gives the alignment boundary, in bits, of an
2475 argument with the specified mode and type. If it is not defined,
2476 `PARM_BOUNDARY' is used for all arguments. */
2478 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
2479 d30v_function_arg_boundary ((int) MODE, TYPE)
2481 /* A C expression that is nonzero if REGNO is the number of a hard register in
2482 which function arguments are sometimes passed. This does *not* include
2483 implicit arguments such as the static chain and the structure-value address.
2484 On many machines, no registers can be used for this purpose since all
2485 function arguments are pushed on the stack. */
2487 #define FUNCTION_ARG_REGNO_P(REGNO) \
2488 IN_RANGE_P (REGNO, GPR_ARG_FIRST, GPR_ARG_LAST)
2491 /* How Scalar Function Values are Returned */
2493 /* Define this macro if `-traditional' should not cause functions declared to
2494 return `float' to convert the value to `double'. */ /* #define
2495 TRADITIONAL_RETURN_FLOAT */
2497 /* A C expression to create an RTX representing the place where a function
2498 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
2499 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
2500 represent that type. On many machines, only the mode is relevant.
2501 (Actually, on most machines, scalar values are returned in the same place
2502 regardless of mode).
2504 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
2505 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
2507 If the precise function being called is known, FUNC is a tree node
2508 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
2509 possible to use a different value-returning convention for specific
2510 functions when all their calls are known.
2512 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
2513 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
2514 related macros, below. */
2516 #define FUNCTION_VALUE(VALTYPE, FUNC) \
2517 gen_rtx (REG, TYPE_MODE (VALTYPE), GPR_RET_VALUE)
2519 /* Define this macro if the target machine has "register windows" so that the
2520 register in which a function returns its value is not the same as the one in
2521 which the caller sees the value.
2523 For such machines, `FUNCTION_VALUE' computes the register in which the
2524 caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a
2525 similar fashion to tell the function where to put the value.
2527 If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both
2530 `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data
2531 types, because these are returned in another way. See `STRUCT_VALUE_REGNUM'
2532 and related macros, below. */
2533 /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */
2535 /* A C expression to create an RTX representing the place where a library
2536 function returns a value of mode MODE. If the precise function being called
2537 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a
2538 null pointer. This makes it possible to use a different value-returning
2539 convention for specific functions when all their calls are known.
2541 Note that "library function" in this context means a compiler support
2542 routine, used to perform arithmetic, whose name is known specially by the
2543 compiler and was not mentioned in the C code being compiled.
2545 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
2546 types, because none of the library functions returns such types. */
2548 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, GPR_RET_VALUE)
2550 /* A C expression that is nonzero if REGNO is the number of a hard register in
2551 which the values of called function may come back.
2553 A register whose use for returning values is limited to serving as the
2554 second of a pair (for a value of type `double', say) need not be recognized
2555 by this macro. So for most machines, this definition suffices:
2557 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
2559 If the machine has register windows, so that the caller and the called
2560 function use different registers for the return value, this macro should
2561 recognize only the caller's register numbers. */
2563 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == GPR_RET_VALUE)
2565 /* Define this macro if `untyped_call' and `untyped_return' need more space
2566 than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an
2567 arbitrary return value. */
2568 /* #define APPLY_RESULT_SIZE */
2571 /* How Large Values are Returned */
2573 /* A C expression which can inhibit the returning of certain function values in
2574 registers, based on the type of value. A nonzero value says to return the
2575 function value in memory, just as large structures are always returned.
2576 Here TYPE will be a C expression of type `tree', representing the data type
2579 Note that values of mode `BLKmode' must be explicitly handled by this macro.
2580 Also, the option `-fpcc-struct-return' takes effect regardless of this
2581 macro. On most systems, it is possible to leave the macro undefined; this
2582 causes a default definition to be used, whose value is the constant 1 for
2583 `BLKmode' values, and 0 otherwise.
2585 Do not use this macro to indicate that structures and unions should always
2586 be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN'
2587 to indicate this. */
2588 /* #define RETURN_IN_MEMORY(TYPE) */
2590 /* Define this macro to be 1 if all structure and union return values must be
2591 in memory. Since this results in slower code, this should be defined only
2592 if needed for compatibility with other compilers or with an ABI. If you
2593 define this macro to be 0, then the conventions used for structure and union
2594 return values are decided by the `RETURN_IN_MEMORY' macro.
2596 If not defined, this defaults to the value 1. */
2597 /* #define DEFAULT_PCC_STRUCT_RETURN */
2599 /* If the structure value address is passed in a register, then
2600 `STRUCT_VALUE_REGNUM' should be the number of that register. */
2602 #define STRUCT_VALUE_REGNUM GPR_ARG_FIRST
2604 /* If the structure value address is not passed in a register, define
2605 `STRUCT_VALUE' as an expression returning an RTX for the place where the
2606 address is passed. If it returns 0, the address is passed as an "invisible"
2609 #define STRUCT_VALUE 0
2611 /* On some architectures the place where the structure value address is found
2612 by the called function is not the same place that the caller put it. This
2613 can be due to register windows, or it could be because the function prologue
2614 moves it to a different place.
2616 If the incoming location of the structure value address is in a register,
2617 define this macro as the register number. */
2618 /* #define STRUCT_VALUE_INCOMING_REGNUM */
2620 /* If the incoming location is not a register, then you should define
2621 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called
2622 function should find the value. If it should find the value on the stack,
2623 define this to create a `mem' which refers to the frame pointer. A
2624 definition of 0 means that the address is passed as an "invisible" first
2626 /* #define STRUCT_VALUE_INCOMING */
2628 /* Define this macro if the usual system convention on the target machine for
2629 returning structures and unions is for the called function to return the
2630 address of a static variable containing the value.
2632 Do not define this if the usual system convention is for the caller to pass
2633 an address to the subroutine.
2635 This macro has effect in `-fpcc-struct-return' mode, but it does nothing
2636 when you use `-freg-struct-return' mode. */
2637 /* #define PCC_STATIC_STRUCT_RETURN */
2640 /* Caller-Saves Register Allocation */
2642 /* Define this macro if function calls on the target machine do not preserve
2643 any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all
2644 registers. This macro enables `-fcaller-saves' by default. Eventually that
2645 option will be enabled by default on all machines and both the option and
2646 this macro will be eliminated. */
2647 /* #define DEFAULT_CALLER_SAVES */
2649 /* A C expression to determine whether it is worthwhile to consider placing a
2650 pseudo-register in a call-clobbered hard register and saving and restoring
2651 it around each function call. The expression should be 1 when this is worth
2652 doing, and 0 otherwise.
2654 If you don't define this macro, a default is used which is good on most
2655 machines: `4 * CALLS < REFS'. */
2656 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
2659 /* Function Entry and Exit */
2661 /* A C compound statement that outputs the assembler code for entry to a
2662 function. The prologue is responsible for setting up the stack frame,
2663 initializing the frame pointer register, saving registers that must be
2664 saved, and allocating SIZE additional bytes of storage for the local
2665 variables. SIZE is an integer. FILE is a stdio stream to which the
2666 assembler code should be output.
2668 The label for the beginning of the function need not be output by this
2669 macro. That has already been done when the macro is run.
2671 To determine which registers to save, the macro can refer to the array
2672 `regs_ever_live': element R is nonzero if hard register R is used anywhere
2673 within the function. This implies the function prologue should save
2674 register R, provided it is not one of the call-used registers.
2675 (`FUNCTION_EPILOGUE' must likewise use `regs_ever_live'.)
2677 On machines that have "register windows", the function entry code does not
2678 save on the stack the registers that are in the windows, even if they are
2679 supposed to be preserved by function calls; instead it takes appropriate
2680 steps to "push" the register stack, if any non-call-used registers are used
2683 On machines where functions may or may not have frame-pointers, the function
2684 entry code must vary accordingly; it must set up the frame pointer if one is
2685 wanted, and not otherwise. To determine whether a frame pointer is in
2686 wanted, the macro can refer to the variable `frame_pointer_needed'. The
2687 variable's value will be 1 at run time in a function that needs a frame
2688 pointer. *Note Elimination::.
2690 The function entry code is responsible for allocating any stack space
2691 required for the function. This stack space consists of the regions listed
2692 below. In most cases, these regions are allocated in the order listed, with
2693 the last listed region closest to the top of the stack (the lowest address
2694 if `STACK_GROWS_DOWNWARD' is defined, and the highest address if it is not
2695 defined). You can use a different order for a machine if doing so is more
2696 convenient or required for compatibility reasons. Except in cases where
2697 required by standard or by a debugger, there is no reason why the stack
2698 layout used by GCC need agree with that used by other compilers for a
2701 * A region of `current_function_pretend_args_size' bytes of
2702 uninitialized space just underneath the first argument
2703 arriving on the stack. (This may not be at the very start of
2704 the allocated stack region if the calling sequence has pushed
2705 anything else since pushing the stack arguments. But
2706 usually, on such machines, nothing else has been pushed yet,
2707 because the function prologue itself does all the pushing.)
2708 This region is used on machines where an argument may be
2709 passed partly in registers and partly in memory, and, in some
2710 cases to support the features in `varargs.h' and `stdargs.h'.
2712 * An area of memory used to save certain registers used by the
2713 function. The size of this area, which may also include
2714 space for such things as the return address and pointers to
2715 previous stack frames, is machine-specific and usually
2716 depends on which registers have been used in the function.
2717 Machines with register windows often do not require a save
2720 * A region of at least SIZE bytes, possibly rounded up to an
2721 allocation boundary, to contain the local variables of the
2722 function. On some machines, this region and the save area
2723 may occur in the opposite order, with the save area closer to
2724 the top of the stack.
2726 * Optionally, when `ACCUMULATE_OUTGOING_ARGS' is defined, a
2727 region of `current_function_outgoing_args_size' bytes to be
2728 used for outgoing argument lists of the function. *Note
2731 Normally, it is necessary for the macros `FUNCTION_PROLOGUE' and
2732 `FUNCTION_EPILOGUE' to treat leaf functions specially. The C variable
2733 `leaf_function' is nonzero for such a function. */
2735 #define FUNCTION_PROLOGUE(FILE, SIZE) d30v_function_prologue (FILE, SIZE)
2737 /* Define this macro as a C expression that is nonzero if the return
2738 instruction or the function epilogue ignores the value of the stack pointer;
2739 in other words, if it is safe to delete an instruction to adjust the stack
2740 pointer before a return from the function.
2742 Note that this macro's value is relevant only for functions for which frame
2743 pointers are maintained. It is never safe to delete a final stack
2744 adjustment in a function that has no frame pointer, and the compiler knows
2745 this regardless of `EXIT_IGNORE_STACK'. */
2746 /* #define EXIT_IGNORE_STACK */
2748 /* Define this macro as a C expression that is nonzero for registers
2749 are used by the epilogue or the `return' pattern. The stack and
2750 frame pointer registers are already be assumed to be used as
2752 #define EPILOGUE_USES(REGNO) ((REGNO) == GPR_LINK)
2754 /* A C compound statement that outputs the assembler code for exit from a
2755 function. The epilogue is responsible for restoring the saved registers and
2756 stack pointer to their values when the function was called, and returning
2757 control to the caller. This macro takes the same arguments as the macro
2758 `FUNCTION_PROLOGUE', and the registers to restore are determined from
2759 `regs_ever_live' and `CALL_USED_REGISTERS' in the same way.
2761 On some machines, there is a single instruction that does all the work of
2762 returning from the function. On these machines, give that instruction the
2763 name `return' and do not define the macro `FUNCTION_EPILOGUE' at all.
2765 Do not define a pattern named `return' if you want the `FUNCTION_EPILOGUE'
2766 to be used. If you want the target switches to control whether return
2767 instructions or epilogues are used, define a `return' pattern with a
2768 validity condition that tests the target switches appropriately. If the
2769 `return' pattern's validity condition is false, epilogues will be used.
2771 On machines where functions may or may not have frame-pointers, the function
2772 exit code must vary accordingly. Sometimes the code for these two cases is
2773 completely different. To determine whether a frame pointer is wanted, the
2774 macro can refer to the variable `frame_pointer_needed'. The variable's
2775 value will be 1 when compiling a function that needs a frame pointer.
2777 Normally, `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE' must treat leaf
2778 functions specially. The C variable `leaf_function' is nonzero for such a
2779 function. *Note Leaf Functions::.
2781 On some machines, some functions pop their arguments on exit while others
2782 leave that for the caller to do. For example, the 68020 when given `-mrtd'
2783 pops arguments in functions that take a fixed number of arguments.
2785 Your definition of the macro `RETURN_POPS_ARGS' decides which functions pop
2786 their own arguments. `FUNCTION_EPILOGUE' needs to know what was decided.
2787 The variable that is called `current_function_pops_args' is the number of
2788 bytes of its arguments that a function should pop. *Note Scalar Return::. */
2790 #define FUNCTION_EPILOGUE(FILE, SIZE) d30v_function_epilogue (FILE, SIZE)
2792 /* Define this macro if the function epilogue contains delay slots to which
2793 instructions from the rest of the function can be "moved". The definition
2794 should be a C expression whose value is an integer representing the number
2795 of delay slots there. */
2796 /* #define DELAY_SLOTS_FOR_EPILOGUE */
2798 /* A C expression that returns 1 if INSN can be placed in delay slot number N
2801 The argument N is an integer which identifies the delay slot now being
2802 considered (since different slots may have different rules of eligibility).
2803 It is never negative and is always less than the number of epilogue delay
2804 slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular
2805 insn for a given delay slot, in principle, it may be reconsidered for a
2806 subsequent delay slot. Also, other insns may (at least in principle) be
2807 considered for the so far unfilled delay slot.
2809 The insns accepted to fill the epilogue delay slots are put in an
2810 RTL list made with `insn_list' objects, stored in the variable
2811 `current_function_epilogue_delay_list'. The insn for the first
2812 delay slot comes first in the list. Your definition of the macro
2813 `FUNCTION_EPILOGUE' should fill the delay slots by outputting the
2814 insns in this list, usually by calling `final_scan_insn'.
2816 You need not define this macro if you did not define
2817 `DELAY_SLOTS_FOR_EPILOGUE'. */
2818 /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */
2820 /* A C compound statement that outputs the assembler code for a thunk function,
2821 used to implement C++ virtual function calls with multiple inheritance. The
2822 thunk acts as a wrapper around a virtual function, adjusting the implicit
2823 object parameter before handing control off to the real function.
2825 First, emit code to add the integer DELTA to the location that contains the
2826 incoming first argument. Assume that this argument contains a pointer, and
2827 is the one used to pass the `this' pointer in C++. This is the incoming
2828 argument *before* the function prologue, e.g. `%o0' on a sparc. The
2829 addition must preserve the values of all other incoming arguments.
2831 After the addition, emit code to jump to FUNCTION, which is a
2832 `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch
2833 the return address. Hence returning from FUNCTION will return to whoever
2834 called the current `thunk'.
2836 The effect must be as if FUNCTION had been called directly with the adjusted
2837 first argument. This macro is responsible for emitting all of the code for
2838 a thunk function; `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE' are not
2841 The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been
2842 extracted from it.) It might possibly be useful on some targets, but
2845 If you do not define this macro, the target-independent code in the C++
2846 frontend will generate a less efficient heavyweight thunk that calls
2847 FUNCTION instead of jumping to it. The generic approach does not support
2849 /* #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) */
2851 /* A C structure for machine-specific, per-function data.
2852 This is added to the cfun structure. */
2853 typedef struct machine_function
2855 /* Additionsl stack adjustment in __builtin_eh_throw. */
2856 struct rtx_def * eh_epilogue_sp_ofs;
2860 /* Generating Code for Profiling. */
2862 /* A C statement or compound statement to output to FILE some assembler code to
2863 call the profiling subroutine `mcount'. Before calling, the assembler code
2864 must load the address of a counter variable into a register where `mcount'
2865 expects to find the address. The name of this variable is `LP' followed by
2866 the number LABELNO, so you would generate the name using `LP%d' in a
2869 The details of how the address should be passed to `mcount' are determined
2870 by your operating system environment, not by GNU CC. To figure them out,
2871 compile a small program for profiling using the system's installed C
2872 compiler and look at the assembler code that results. */
2874 #define FUNCTION_PROFILER(FILE, LABELNO) d30v_function_profiler (FILE, LABELNO)
2876 /* Define this macro if the code for function profiling should come before the
2877 function prologue. Normally, the profiling code comes after. */
2878 /* #define PROFILE_BEFORE_PROLOGUE */
2880 /* A C statement or compound statement to output to FILE some assembler code to
2881 initialize basic-block profiling for the current object module. The global
2882 compile flag `profile_block_flag' distingishes two profile modes.
2884 profile_block_flag != 2'
2885 Output code to call the subroutine `__bb_init_func' once per
2886 object module, passing it as its sole argument the address of
2887 a block allocated in the object module.
2889 The name of the block is a local symbol made with this
2892 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2894 Of course, since you are writing the definition of
2895 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2896 you can take a short cut in the definition of this macro and
2897 use the name that you know will result.
2899 The first word of this block is a flag which will be nonzero
2900 if the object module has already been initialized. So test
2901 this word first, and do not call `__bb_init_func' if the flag
2902 is nonzero. BLOCK_OR_LABEL contains a unique number which
2903 may be used to generate a label as a branch destination when
2904 `__bb_init_func' will not be called.
2906 Described in assembler language, the code to be output looks
2915 profile_block_flag == 2'
2916 Output code to call the subroutine `__bb_init_trace_func' and
2917 pass two parameters to it. The first parameter is the same as
2918 for `__bb_init_func'. The second parameter is the number of
2919 the first basic block of the function as given by
2920 BLOCK_OR_LABEL. Note that `__bb_init_trace_func' has to be
2921 called, even if the object module has been initialized
2924 Described in assembler language, the code to be output looks
2927 parameter2 <- BLOCK_OR_LABEL
2928 call __bb_init_trace_func */
2929 /* #define FUNCTION_BLOCK_PROFILER (FILE, LABELNO) */
2931 /* A C statement or compound statement to output to FILE some assembler code to
2932 increment the count associated with the basic block number BLOCKNO. The
2933 global compile flag `profile_block_flag' distingishes two profile modes.
2935 profile_block_flag != 2'
2936 Output code to increment the counter directly. Basic blocks
2937 are numbered separately from zero within each compilation.
2938 The count associated with block number BLOCKNO is at index
2939 BLOCKNO in a vector of words; the name of this array is a
2940 local symbol made with this statement:
2942 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 2);
2944 Of course, since you are writing the definition of
2945 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2946 you can take a short cut in the definition of this macro and
2947 use the name that you know will result.
2949 Described in assembler language, the code to be output looks
2952 inc (LPBX2+4*BLOCKNO)
2954 profile_block_flag == 2'
2955 Output code to initialize the global structure `__bb' and
2956 call the function `__bb_trace_func', which will increment the
2959 `__bb' consists of two words. In the first word, the current
2960 basic block number, as given by BLOCKNO, has to be stored. In
2961 the second word, the address of a block allocated in the
2962 object module has to be stored. The address is given by the
2963 label created with this statement:
2965 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2967 Described in assembler language, the code to be output looks
2969 move BLOCKNO -> (__bb)
2970 move LPBX0 -> (__bb+4)
2971 call __bb_trace_func */
2972 /* #define BLOCK_PROFILER(FILE, BLOCKNO) */
2974 /* A C statement or compound statement to output to FILE assembler
2975 code to call function `__bb_trace_ret'. The assembler code should
2976 only be output if the global compile flag `profile_block_flag' ==
2977 2. This macro has to be used at every place where code for
2978 returning from a function is generated (e.g. `FUNCTION_EPILOGUE').
2979 Although you have to write the definition of `FUNCTION_EPILOGUE'
2980 as well, you have to define this macro to tell the compiler, that
2981 the proper call to `__bb_trace_ret' is produced. */
2982 /* #define FUNCTION_BLOCK_PROFILER_EXIT(FILE) */
2984 /* A C statement or compound statement to save all registers, which may be
2985 clobbered by a function call, including condition codes. The `asm'
2986 statement will be mostly likely needed to handle this task. Local labels in
2987 the assembler code can be concatenated with the string ID, to obtain a
2990 Registers or condition codes clobbered by `FUNCTION_PROLOGUE' or
2991 `FUNCTION_EPILOGUE' must be saved in the macros `FUNCTION_BLOCK_PROFILER',
2992 `FUNCTION_BLOCK_PROFILER_EXIT' and `BLOCK_PROFILER' prior calling
2993 `__bb_init_trace_func', `__bb_trace_ret' and `__bb_trace_func' respectively. */
2994 /* #define MACHINE_STATE_SAVE(ID) */
2996 /* A C statement or compound statement to restore all registers, including
2997 condition codes, saved by `MACHINE_STATE_SAVE'.
2999 Registers or condition codes clobbered by `FUNCTION_PROLOGUE' or
3000 `FUNCTION_EPILOGUE' must be restored in the macros
3001 `FUNCTION_BLOCK_PROFILER', `FUNCTION_BLOCK_PROFILER_EXIT' and
3002 `BLOCK_PROFILER' after calling `__bb_init_trace_func', `__bb_trace_ret' and
3003 `__bb_trace_func' respectively. */
3004 /* #define MACHINE_STATE_RESTORE(ID) */
3006 /* A C function or functions which are needed in the library to support block
3008 /* #define BLOCK_PROFILER_CODE */
3011 /* Implementing the Varargs Macros. */
3013 /* If defined, is a C expression that produces the machine-specific code for a
3014 call to `__builtin_saveregs'. This code will be moved to the very beginning
3015 of the function, before any parameter access are made. The return value of
3016 this function should be an RTX that contains the value to use as the return
3017 of `__builtin_saveregs'.
3019 If this macro is not defined, the compiler will output an ordinary call to
3020 the library function `__builtin_saveregs'. */
3022 #define EXPAND_BUILTIN_SAVEREGS() d30v_expand_builtin_saveregs ()
3024 /* This macro offers an alternative to using `__builtin_saveregs' and defining
3025 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
3026 arguments into the stack so that all the arguments appear to have been
3027 passed consecutively on the stack. Once this is done, you can use the
3028 standard implementation of varargs that works for machines that pass all
3029 their arguments on the stack.
3031 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
3032 the values that obtain after processing of the named arguments. The
3033 arguments MODE and TYPE describe the last named argument--its machine mode
3034 and its data type as a tree node.
3036 The macro implementation should do two things: first, push onto the stack
3037 all the argument registers *not* used for the named arguments, and second,
3038 store the size of the data thus pushed into the `int'-valued variable whose
3039 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
3040 store here will serve as additional offset for setting up the stack frame.
3042 Because you must generate code to push the anonymous arguments at compile
3043 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
3044 useful on machines that have just a single category of argument register and
3045 use it uniformly for all data types.
3047 If the argument SECOND_TIME is nonzero, it means that the arguments of the
3048 function are being analyzed for the second time. This happens for an inline
3049 function, which is not actually compiled until the end of the source file.
3050 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
3053 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
3054 d30v_setup_incoming_varargs (&ARGS_SO_FAR, (int) MODE, TYPE, \
3055 &PRETEND_ARGS_SIZE, SECOND_TIME)
3057 /* Define this macro if the location where a function argument is passed
3058 depends on whether or not it is a named argument.
3060 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
3061 varargs and stdarg functions. With this macro defined, the NAMED argument
3062 is always true for named arguments, and false for unnamed arguments. If
3063 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
3064 arguments are treated as named. Otherwise, all named arguments except the
3065 last are treated as named. */
3066 /* #define STRICT_ARGUMENT_NAMING */
3068 /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not
3069 defined, it is assumed that va_list is a void * pointer. */
3071 #define BUILD_VA_LIST_TYPE(VALIST) \
3072 (VALIST) = d30v_build_va_list ()
3075 /* Implement the stdarg/varargs va_start macro. STDARG_P is non-zero if this
3076 is stdarg.h instead of varargs.h. VALIST is the tree of the va_list
3077 variable to initialize. NEXTARG is the machine independent notion of the
3078 'next' argument after the variable arguments. If not defined, a standard
3079 implementation will be defined that works for arguments passed on the stack. */
3081 #define EXPAND_BUILTIN_VA_START(STDARG_P, VALIST, NEXTARG) \
3082 (d30v_expand_builtin_va_start(STDARG_P, VALIST, NEXTARG))
3084 /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type
3085 va_list as a tree, TYPE is the type passed to va_arg. */
3087 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
3088 (d30v_expand_builtin_va_arg (VALIST, TYPE))
3090 /* Implement the stdarg/varargs va_end macro.
3091 VALIST is the variable of type va_list as a tree. */
3093 /* #define EXPAND_BUILTIN_VA_END(VALIST) */
3097 /* Trampolines for Nested Functions. */
3099 /* A C statement to output, on the stream FILE, assembler code for a block of
3100 data that contains the constant parts of a trampoline. This code should not
3101 include a label--the label is taken care of automatically. */
3102 /* #define TRAMPOLINE_TEMPLATE(FILE) d30v_trampoline_template (FILE) */
3104 /* The name of a subroutine to switch to the section in which the trampoline
3105 template is to be placed (*note Sections::.). The default is a value of
3106 `readonly_data_section', which places the trampoline in the section
3107 containing read-only data. */
3108 /* #define TRAMPOLINE_SECTION */
3110 /* A C expression for the size in bytes of the trampoline, as an integer. */
3111 #define TRAMPOLINE_SIZE (d30v_trampoline_size ())
3113 /* Alignment required for trampolines, in bits.
3115 If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for
3116 aligning trampolines. */
3117 #define TRAMPOLINE_ALIGNMENT 64
3119 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
3120 RTX for the address of the trampoline; FNADDR is an RTX for the address of
3121 the nested function; STATIC_CHAIN is an RTX for the static chain value that
3122 should be passed to the function when it is called. */
3123 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
3124 d30v_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
3126 /* A C expression to allocate run-time space for a trampoline. The expression
3127 value should be an RTX representing a memory reference to the space for the
3130 If this macro is not defined, by default the trampoline is allocated as a
3131 stack slot. This default is right for most machines. The exceptions are
3132 machines where it is impossible to execute instructions in the stack area.
3133 On such machines, you may have to implement a separate stack, using this
3134 macro in conjunction with `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE'.
3136 FP points to a data structure, a `struct function', which describes the
3137 compilation status of the immediate containing function of the function
3138 which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not
3139 defined), the stack slot for the trampoline is in the stack frame of this
3140 containing function. Other allocation strategies probably must do something
3141 analogous with this information. */
3142 /* #define ALLOCATE_TRAMPOLINE(FP) */
3144 /* Implementing trampolines is difficult on many machines because they have
3145 separate instruction and data caches. Writing into a stack location fails
3146 to clear the memory in the instruction cache, so when the program jumps to
3147 that location, it executes the old contents.
3149 Here are two possible solutions. One is to clear the relevant parts of the
3150 instruction cache whenever a trampoline is set up. The other is to make all
3151 trampolines identical, by having them jump to a standard subroutine. The
3152 former technique makes trampoline execution faster; the latter makes
3153 initialization faster.
3155 To clear the instruction cache when a trampoline is initialized, define the
3156 following macros which describe the shape of the cache. */
3158 /* The total size in bytes of the cache. */
3159 /* #define INSN_CACHE_SIZE */
3161 /* The length in bytes of each cache line. The cache is divided into cache
3162 lines which are disjoint slots, each holding a contiguous chunk of data
3163 fetched from memory. Each time data is brought into the cache, an entire
3164 line is read at once. The data loaded into a cache line is always aligned
3165 on a boundary equal to the line size. */
3166 /* #define INSN_CACHE_LINE_WIDTH */
3168 /* The number of alternative cache lines that can hold any particular memory
3170 /* #define INSN_CACHE_DEPTH */
3172 /* Alternatively, if the machine has system calls or instructions to clear the
3173 instruction cache directly, you can define the following macro. */
3175 /* If defined, expands to a C expression clearing the *instruction cache* in
3176 the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE
3177 is defined, some generic code is generated to clear the cache. The
3178 definition of this macro would typically be a series of `asm' statements.
3179 Both BEG and END are both pointer expressions. */
3180 /* #define CLEAR_INSN_CACHE (BEG, END) */
3182 /* To use a standard subroutine, define the following macro. In addition, you
3183 must make sure that the instructions in a trampoline fill an entire cache
3184 line with identical instructions, or else ensure that the beginning of the
3185 trampoline code is always aligned at the same point in its cache line. Look
3186 in `m68k.h' as a guide. */
3188 /* Define this macro if trampolines need a special subroutine to do their work.
3189 The macro should expand to a series of `asm' statements which will be
3190 compiled with GNU CC. They go in a library function named
3191 `__transfer_from_trampoline'.
3193 If you need to avoid executing the ordinary prologue code of a compiled C
3194 function when you jump to the subroutine, you can do so by placing a special
3195 label of your own in the assembler code. Use one `asm' statement to
3196 generate an assembler label, and another to make the label global. Then
3197 trampolines can use that label to jump directly to your special assembler
3199 /* #define TRANSFER_FROM_TRAMPOLINE */
3202 /* Implicit Calls to Library Routines */
3204 /* A C string constant giving the name of the function to call for
3205 multiplication of one signed full-word by another. If you do not define
3206 this macro, the default name is used, which is `__mulsi3', a function
3207 defined in `libgcc.a'. */
3208 /* #define MULSI3_LIBCALL */
3210 /* A C string constant giving the name of the function to call for division of
3211 one signed full-word by another. If you do not define this macro, the
3212 default name is used, which is `__divsi3', a function defined in `libgcc.a'. */
3213 /* #define DIVSI3_LIBCALL */
3215 /* A C string constant giving the name of the function to call for division of
3216 one unsigned full-word by another. If you do not define this macro, the
3217 default name is used, which is `__udivsi3', a function defined in
3219 /* #define UDIVSI3_LIBCALL */
3221 /* A C string constant giving the name of the function to call for the
3222 remainder in division of one signed full-word by another. If you do not
3223 define this macro, the default name is used, which is `__modsi3', a function
3224 defined in `libgcc.a'. */
3225 /* #define MODSI3_LIBCALL */
3227 /* A C string constant giving the name of the function to call for the
3228 remainder in division of one unsigned full-word by another. If you do not
3229 define this macro, the default name is used, which is `__umodsi3', a
3230 function defined in `libgcc.a'. */
3231 /* #define UMODSI3_LIBCALL */
3233 /* A C string constant giving the name of the function to call for
3234 multiplication of one signed double-word by another. If you do not define
3235 this macro, the default name is used, which is `__muldi3', a function
3236 defined in `libgcc.a'. */
3237 /* #define MULDI3_LIBCALL */
3239 /* A C string constant giving the name of the function to call for division of
3240 one signed double-word by another. If you do not define this macro, the
3241 default name is used, which is `__divdi3', a function defined in `libgcc.a'. */
3242 /* #define DIVDI3_LIBCALL */
3244 /* A C string constant giving the name of the function to call for division of
3245 one unsigned full-word by another. If you do not define this macro, the
3246 default name is used, which is `__udivdi3', a function defined in
3248 /* #define UDIVDI3_LIBCALL */
3250 /* A C string constant giving the name of the function to call for the
3251 remainder in division of one signed double-word by another. If you do not
3252 define this macro, the default name is used, which is `__moddi3', a function
3253 defined in `libgcc.a'. */
3254 /* #define MODDI3_LIBCALL */
3256 /* A C string constant giving the name of the function to call for the
3257 remainder in division of one unsigned full-word by another. If you do not
3258 define this macro, the default name is used, which is `__umoddi3', a
3259 function defined in `libgcc.a'. */
3260 /* #define UMODDI3_LIBCALL */
3262 /* Define this macro as a C statement that declares additional library routines
3263 renames existing ones. `init_optabs' calls this macro after initializing all
3264 the normal library routines. */
3265 /* #define INIT_TARGET_OPTABS */
3267 /* The value of `EDOM' on the target machine, as a C integer constant
3268 expression. If you don't define this macro, GNU CC does not attempt to
3269 deposit the value of `EDOM' into `errno' directly. Look in
3270 `/usr/include/errno.h' to find the value of `EDOM' on your system.
3272 If you do not define `TARGET_EDOM', then compiled code reports domain errors
3273 by calling the library function and letting it report the error. If
3274 mathematical functions on your system use `matherr' when there is an error,
3275 then you should leave `TARGET_EDOM' undefined so that `matherr' is used
3277 /* #define TARGET_EDOM */
3279 /* Define this macro as a C expression to create an rtl expression that refers
3280 to the global "variable" `errno'. (On certain systems, `errno' may not
3281 actually be a variable.) If you don't define this macro, a reasonable
3283 /* #define GEN_ERRNO_RTX */
3285 /* Define this macro if GNU CC should generate calls to the System V (and ANSI
3286 C) library functions `memcpy' and `memset' rather than the BSD functions
3287 `bcopy' and `bzero'.
3289 Defined in svr4.h. */
3290 /* #define TARGET_MEM_FUNCTIONS */
3292 /* Define this macro to generate code for Objective C message sending using the
3293 calling convention of the NeXT system. This calling convention involves
3294 passing the object, the selector and the method arguments all at once to the
3295 method-lookup library function.
3297 The default calling convention passes just the object and the selector to
3298 the lookup function, which returns a pointer to the method. */
3299 /* #define NEXT_OBJC_RUNTIME */
3302 /* Addressing Modes */
3304 /* Define this macro if the machine supports post-increment addressing. */
3305 #define HAVE_POST_INCREMENT 1
3307 /* Similar for other kinds of addressing. */
3308 /* #define HAVE_PRE_INCREMENT 0 */
3309 #define HAVE_POST_DECREMENT 1
3310 /* #define HAVE_PRE_DECREMENT 0 */
3312 /* A C expression that is 1 if the RTX X is a constant which is a valid
3313 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
3314 few machines are more restrictive in which constant addresses are supported.
3316 `CONSTANT_P' accepts integer-values expressions whose values are not
3317 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
3318 and `const' arithmetic expressions, in addition to `const_int' and
3319 `const_double' expressions. */
3320 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
3322 /* A number, the maximum number of registers that can appear in a valid memory
3323 address. Note that it is up to you to specify a value equal to the maximum
3324 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
3325 #define MAX_REGS_PER_ADDRESS 2
3327 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
3328 RTX) is a legitimate memory address on the target machine for a memory
3329 operand of mode MODE.
3331 It usually pays to define several simpler macros to serve as subroutines for
3332 this one. Otherwise it may be too complicated to understand.
3334 This macro must exist in two variants: a strict variant and a non-strict
3335 one. The strict variant is used in the reload pass. It must be defined so
3336 that any pseudo-register that has not been allocated a hard register is
3337 considered a memory reference. In contexts where some kind of register is
3338 required, a pseudo-register with no hard register must be rejected.
3340 The non-strict variant is used in other passes. It must be defined to
3341 accept all pseudo-registers in every context where some kind of register is
3344 Compiler source files that want to use the strict variant of this macro
3345 define the macro `REG_OK_STRICT'. You should use an `#ifdef REG_OK_STRICT'
3346 conditional to define the strict variant in that case and the non-strict
3349 Subroutines to check for acceptable registers for various purposes (one for
3350 base registers, one for index registers, and so on) are typically among the
3351 subroutines used to define `GO_IF_LEGITIMATE_ADDRESS'. Then only these
3352 subroutine macros need have two variants; the higher levels of macros may be
3353 the same whether strict or not.
3355 Normally, constant addresses which are the sum of a `symbol_ref' and an
3356 integer are stored inside a `const' RTX to mark them as constant.
3357 Therefore, there is no need to recognize such sums specifically as
3358 legitimate addresses. Normally you would simply recognize any `const' as
3361 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant sums that
3362 are not marked with `const'. It assumes that a naked `plus' indicates
3363 indexing. If so, then you *must* reject such naked constant sums as
3364 illegitimate addresses, so that none of them will be given to
3365 `PRINT_OPERAND_ADDRESS'.
3367 On some machines, whether a symbolic address is legitimate depends on the
3368 section that the address refers to. On these machines, define the macro
3369 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
3370 then check for it here. When you see a `const', you will have to look
3371 inside it to find the `symbol_ref' in order to determine the section. *Note
3374 The best way to modify the name string is by adding text to the beginning,
3375 with suitable punctuation to prevent any ambiguity. Allocate the new name
3376 in `saveable_obstack'. You will have to modify `ASM_OUTPUT_LABELREF' to
3377 remove and decode the added text and output the name accordingly, and define
3378 `STRIP_NAME_ENCODING' to access the original name string.
3380 You can check the information stored here into the `symbol_ref' in the
3381 definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
3382 `PRINT_OPERAND_ADDRESS'. */
3384 #ifdef REG_OK_STRICT
3385 #define REG_OK_STRICT_P 1
3387 #define REG_OK_STRICT_P 0
3390 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
3392 if (d30v_legitimate_address_p ((int)MODE, X, REG_OK_STRICT_P)) \
3396 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3397 use as a base register. For hard registers, it should always accept those
3398 which the hardware permits and reject the others. Whether the macro accepts
3399 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
3400 described above. This usually requires two variant definitions, of which
3401 `REG_OK_STRICT' controls the one actually used. */
3403 #ifdef REG_OK_STRICT
3404 #define REG_OK_FOR_BASE_P(X) (GPR_P (REGNO (X)))
3406 #define REG_OK_FOR_BASE_P(X) (GPR_OR_PSEUDO_P (REGNO (X)))
3409 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3410 use as an index register.
3412 The difference between an index register and a base register is that the
3413 index register may be scaled. If an address involves the sum of two
3414 registers, neither one of them scaled, then either one may be labeled the
3415 "base" and the other the "index"; but whichever labeling is used must fit
3416 the machine's constraints of which registers may serve in each capacity.
3417 The compiler will try both labelings, looking for one that is valid, and
3418 will reload one or both registers only if neither labeling works. */
3420 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
3422 /* A C compound statement that attempts to replace X with a valid memory
3423 address for an operand of mode MODE. WIN will be a C statement label
3424 elsewhere in the code; the macro definition may use
3426 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
3428 to avoid further processing if the address has become legitimate.
3430 X will always be the result of a call to `break_out_memory_refs', and OLDX
3431 will be the operand that was given to that function to produce X.
3433 The code generated by this macro should not alter the substructure of X. If
3434 it transforms X into a more legitimate form, it should assign X (which will
3435 always be a C variable) a new value.
3437 It is not necessary for this macro to come up with a legitimate address.
3438 The compiler has standard ways of doing so in all cases. In fact, it is
3439 safe for this macro to do nothing. But often a machine-dependent strategy
3440 can generate better code. */
3442 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
3444 rtx y = d30v_legitimize_address (X, OLDX, (int)MODE, REG_OK_STRICT_P); \
3448 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); \
3452 /* A C statement or compound statement with a conditional `goto LABEL;'
3453 executed if memory address X (an RTX) can have different meanings depending
3454 on the machine mode of the memory reference it is used for or if the address
3455 is valid for some modes but not others.
3457 Autoincrement and autodecrement addresses typically have mode-dependent
3458 effects because the amount of the increment or decrement is the size of the
3459 operand being addressed. Some machines have other mode-dependent addresses.
3460 Many RISC machines have no mode-dependent addresses.
3462 You may assume that ADDR is a valid address for the machine. */
3464 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
3466 if (d30v_mode_dependent_address_p (ADDR)) \
3470 /* A C expression that is nonzero if X is a legitimate constant for an
3471 immediate operand on the target machine. You can assume that X satisfies
3472 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
3473 definition for this macro on machines where anything `CONSTANT_P' is valid. */
3474 #define LEGITIMATE_CONSTANT_P(X) 1
3477 /* Condition Code Status */
3479 /* C code for a data type which is used for declaring the `mdep' component of
3480 `cc_status'. It defaults to `int'.
3482 This macro is not used on machines that do not use `cc0'. */
3483 /* #define CC_STATUS_MDEP */
3485 /* A C expression to initialize the `mdep' field to "empty". The default
3486 definition does nothing, since most machines don't use the field anyway. If
3487 you want to use the field, you should probably define this macro to
3490 This macro is not used on machines that do not use `cc0'. */
3491 /* #define CC_STATUS_MDEP_INIT */
3493 /* A C compound statement to set the components of `cc_status' appropriately
3494 for an insn INSN whose body is EXP. It is this macro's responsibility to
3495 recognize insns that set the condition code as a byproduct of other activity
3496 as well as those that explicitly set `(cc0)'.
3498 This macro is not used on machines that do not use `cc0'.
3500 If there are insns that do not set the condition code but do alter other
3501 machine registers, this macro must check to see whether they invalidate the
3502 expressions that the condition code is recorded as reflecting. For example,
3503 on the 68000, insns that store in address registers do not set the condition
3504 code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status'
3505 unaltered for such insns. But suppose that the previous insn set the
3506 condition code based on location `a4@(102)' and the current insn stores a
3507 new value in `a4'. Although the condition code is not changed by this, it
3508 will no longer be true that it reflects the contents of `a4@(102)'.
3509 Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say
3510 that nothing is known about the condition code value.
3512 The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the
3513 results of peephole optimization: insns whose patterns are `parallel' RTXs
3514 containing various `reg', `mem' or constants which are just the operands.
3515 The RTL structure of these insns is not sufficient to indicate what the
3516 insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is
3517 just to run `CC_STATUS_INIT'.
3519 A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks
3520 at an attribute (*note Insn Attributes::.) named, for example, `cc'. This
3521 avoids having detailed information about patterns in two places, the `md'
3522 file and in `NOTICE_UPDATE_CC'. */
3523 /* #define NOTICE_UPDATE_CC(EXP, INSN) */
3525 /* A list of names to be used for additional modes for condition code values in
3526 registers (*note Jump Patterns::.). These names are added to `enum
3527 machine_mode' and all have class `MODE_CC'. By convention, they should
3528 start with `CC' and end with `mode'.
3530 You should only define this macro if your machine does not use `cc0' and
3531 only if additional modes are required. */
3532 /* #define EXTRA_CC_MODES */
3534 /* Returns a mode from class `MODE_CC' to be used when comparison operation
3535 code OP is applied to rtx X and Y. For example, on the Sparc,
3536 `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a
3537 description of the reason for this definition)
3539 #define SELECT_CC_MODE(OP,X,Y) \
3540 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
3541 ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \
3542 : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \
3543 || GET_CODE (X) == NEG) \
3544 ? CC_NOOVmode : CCmode))
3546 You need not define this macro if `EXTRA_CC_MODES' is not defined. */
3547 /* #define SELECT_CC_MODE(OP, X, Y) */
3549 /* One some machines not all possible comparisons are defined, but you can
3550 convert an invalid comparison into a valid one. For example, the Alpha does
3551 not have a `GT' comparison, but you can use an `LT' comparison instead and
3552 swap the order of the operands.
3554 On such machines, define this macro to be a C statement to do any required
3555 conversions. CODE is the initial comparison code and OP0 and OP1 are the
3556 left and right operands of the comparison, respectively. You should modify
3557 CODE, OP0, and OP1 as required.
3559 GNU CC will not assume that the comparison resulting from this macro is
3560 valid but will see if the resulting insn matches a pattern in the `md' file.
3562 You need not define this macro if it would never change the comparison code
3564 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
3566 /* A C expression whose value is one if it is always safe to reverse a
3567 comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for
3568 a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)'
3571 You need not define this macro if it would always returns zero or if the
3572 floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For
3573 example, here is the definition used on the Sparc, where floating-point
3574 inequality comparisons are always given `CCFPEmode':
3576 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */
3577 /* #define REVERSIBLE_CC_MODE(MODE) */
3580 /* Describing Relative Costs of Operations */
3582 /* A part of a C `switch' statement that describes the relative costs of
3583 constant RTL expressions. It must contain `case' labels for expression
3584 codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'.
3585 Each case must ultimately reach a `return' statement to return the relative
3586 cost of the use of that kind of constant value in an expression. The cost
3587 may depend on the precise value of the constant, which is available for
3588 examination in X, and the rtx code of the expression in which it is
3589 contained, found in OUTER_CODE.
3591 CODE is the expression code--redundant, since it can be obtained with
3594 /* On the d30v, consider operatnds that fit in a short instruction very
3595 cheap. However, at this time, it causes cse to generate incorrect
3596 code, so disable it for now. */
3598 #define CONST_COSTS(X, CODE, OUTER_CODE) \
3600 if (IN_RANGE_P (INTVAL (X), 0, 31)) \
3602 else if ((OUTER_CODE) == LEU && (OUTER_CODE) == LTU \
3603 && (OUTER_CODE) == GEU && (OUTER_CODE) == GTU) \
3604 return IN_RANGE_P (INTVAL (X), 32, 63) ? 0 : COSTS_N_INSNS (2); \
3606 return IN_RANGE_P (INTVAL (X), -31, -1) ? 0 : COSTS_N_INSNS (2); \
3610 return COSTS_N_INSNS (2); \
3611 case CONST_DOUBLE: \
3612 return COSTS_N_INSNS ((GET_MODE (X) == SFmode) ? 2 : 4);
3614 #define CONST_COSTS(X, CODE, OUTER_CODE)
3617 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be
3618 used, for example, to indicate how costly a multiply instruction is. In
3619 writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify
3620 a cost equal to N fast instructions. OUTER_CODE is the code of the
3621 expression in which X is contained.
3623 This macro is optional; do not define it if the default cost assumptions are
3624 adequate for the target machine. */
3625 #define RTX_COSTS(X, CODE, OUTER_CODE) \
3627 return COSTS_N_INSNS ((GET_CODE (XEXP (x, 1)) == CONST_INT \
3628 && exact_log2 (INTVAL (XEXP (x, 1))) >= 0) \
3631 /* An expression giving the cost of an addressing mode that contains ADDRESS.
3632 If not defined, the cost is computed from the ADDRESS expression and the
3633 `CONST_COSTS' values.
3635 For most CISC machines, the default cost is a good approximation of the true
3636 cost of the addressing mode. However, on RISC machines, all instructions
3637 normally have the same length and execution time. Hence all addresses will
3640 In cases where more than one form of an address is known, the form with the
3641 lowest cost will be used. If multiple forms have the same, lowest, cost,
3642 the one that is the most complex will be used.
3644 For example, suppose an address that is equal to the sum of a register and a
3645 constant is used twice in the same basic block. When this macro is not
3646 defined, the address will be computed in a register and memory references
3647 will be indirect through that register. On machines where the cost of the
3648 addressing mode containing the sum is no higher than that of a simple
3649 indirect reference, this will produce an additional instruction and possibly
3650 require an additional register. Proper specification of this macro
3651 eliminates this overhead for such machines.
3653 Similar use of this macro is made in strength reduction of loops.
3655 ADDRESS need not be valid as an address. In such a case, the cost is not
3656 relevant and can be any value; invalid addresses need not be assigned a
3659 On machines where an address involving more than one register is as cheap as
3660 an address computation involving only one register, defining `ADDRESS_COST'
3661 to reflect this can cause two registers to be live over a region of code
3662 where only one would have been if `ADDRESS_COST' were not defined in that
3663 manner. This effect should be considered in the definition of this macro.
3664 Equivalent costs should probably only be given to addresses with different
3665 numbers of registers on machines with lots of registers.
3667 This macro will normally either not be defined or be defined as a constant. */
3668 #define ADDRESS_COST(ADDRESS) 0
3670 /* A C expression for the cost of moving data from a register in class FROM to
3671 one in class TO. The classes are expressed using the enumeration values
3672 such as `GENERAL_REGS'. A value of 4 is the default; other values are
3673 interpreted relative to that.
3675 It is not required that the cost always equal 2 when FROM is the same as TO;
3676 on some machines it is expensive to move between registers if they are not
3679 If reload sees an insn consisting of a single `set' between two hard
3680 registers, and if `REGISTER_MOVE_COST' applied to their classes returns a
3681 value of 2, reload does not check to ensure that the constraints of the insn
3682 are met. Setting a cost of other than 2 will allow reload to verify that
3683 the constraints are met. You should do this if the `movM' pattern's
3684 constraints do not allow such copying. */
3686 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
3687 (((FROM) != GPR_REGS && (FROM) != EVEN_REGS \
3688 && (TO) != GPR_REGS && (TO) != EVEN_REGS) ? 4 : 2)
3690 /* A C expression for the cost of moving data of mode M between a register and
3691 memory. A value of 2 is the default; this cost is relative to those in
3692 `REGISTER_MOVE_COST'.
3694 If moving between registers and memory is more expensive than between two
3695 registers, you should define this macro to express the relative cost. */
3696 #define MEMORY_MOVE_COST(M,C,I) 4
3698 /* A C expression for the cost of a branch instruction. A value of 1 is the
3699 default; other values are interpreted relative to that. */
3701 #define BRANCH_COST d30v_branch_cost
3703 #define D30V_DEFAULT_BRANCH_COST 2
3705 /* Values of the -mbranch-cost=n string. */
3706 extern int d30v_branch_cost;
3707 extern const char *d30v_branch_cost_string;
3709 /* Here are additional macros which do not specify precise relative costs, but
3710 only that certain actions are more expensive than GNU CC would ordinarily
3713 /* Define this macro as a C expression which is nonzero if accessing less than
3714 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
3715 word of memory, i.e., if such access require more than one instruction or if
3716 there is no difference in cost between byte and (aligned) word loads.
3718 When this macro is not defined, the compiler will access a field by finding
3719 the smallest containing object; when it is defined, a fullword load will be
3720 used if alignment permits. Unless bytes accesses are faster than word
3721 accesses, using word accesses is preferable since it may eliminate
3722 subsequent memory access if subsequent accesses occur to other fields in the
3723 same word of the structure, but to different bytes. */
3724 #define SLOW_BYTE_ACCESS 1
3726 /* Define this macro if zero-extension (of a `char' or `short' to an `int') can
3727 be done faster if the destination is a register that is known to be zero.
3729 If you define this macro, you must have instruction patterns that recognize
3730 RTL structures like this:
3732 (set (strict_low_part (subreg:QI (reg:SI ...) 0)) ...)
3734 and likewise for `HImode'. */
3735 #define SLOW_ZERO_EXTEND 0
3737 /* Define this macro to be the value 1 if unaligned accesses have a cost many
3738 times greater than aligned accesses, for example if they are emulated in a
3741 When this macro is non-zero, the compiler will act as if `STRICT_ALIGNMENT'
3742 were non-zero when generating code for block moves. This can cause
3743 significantly more instructions to be produced. Therefore, do not set this
3744 macro non-zero if unaligned accesses only add a cycle or two to the time for
3747 If the value of this macro is always zero, it need not be defined. */
3748 /* #define SLOW_UNALIGNED_ACCESS */
3750 /* Define this macro to inhibit strength reduction of memory addresses. (On
3751 some machines, such strength reduction seems to do harm rather than good.) */
3752 /* #define DONT_REDUCE_ADDR */
3754 /* The number of scalar move insns which should be generated instead of a
3755 string move insn or a library call. Increasing the value will always make
3756 code faster, but eventually incurs high cost in increased code size.
3758 If you don't define this, a reasonable default is used. */
3759 /* #define MOVE_RATIO */
3761 /* Define this macro if it is as good or better to call a constant function
3762 address than to call an address kept in a register. */
3763 #define NO_FUNCTION_CSE
3765 /* Define this macro if it is as good or better for a function to call itself
3766 with an explicit address than to call an address kept in a register. */
3767 /* #define NO_RECURSIVE_FUNCTION_CSE */
3769 /* A C statement (sans semicolon) to update the integer variable COST based on
3770 the relationship between INSN that is dependent on DEP_INSN through the
3771 dependence LINK. The default is to make no adjustment to COST. This can be
3772 used for example to specify to the scheduler that an output- or
3773 anti-dependence does not incur the same cost as a data-dependence. */
3775 #define ADJUST_COST(INSN,LINK,DEP_INSN,COST) \
3776 (COST) = d30v_adjust_cost (INSN, LINK, DEP_INSN, COST)
3778 /* A C statement (sans semicolon) to update the integer scheduling
3779 priority `INSN_PRIORITY(INSN)'. Reduce the priority to execute
3780 the INSN earlier, increase the priority to execute INSN later.
3781 Do not define this macro if you do not need to adjust the
3782 scheduling priorities of insns. */
3783 /* #define ADJUST_PRIORITY (INSN) */
3785 /* Macro to determine whether the Haifa scheduler is used. */
3793 /* Dividing the output into sections. */
3795 /* A C expression whose value is a string containing the assembler operation
3796 that should precede instructions and read-only data. Normally `".text"' is
3798 #define TEXT_SECTION_ASM_OP "\t.text"
3800 /* A C expression whose value is a string containing the assembler operation to
3801 identify the following data as writable initialized data. Normally
3802 `".data"' is right. */
3803 #define DATA_SECTION_ASM_OP "\t.data"
3805 /* if defined, a C expression whose value is a string containing the assembler
3806 operation to identify the following data as shared data. If not defined,
3807 `DATA_SECTION_ASM_OP' will be used. */
3808 /* #define SHARED_SECTION_ASM_OP */
3810 /* If defined, a C expression whose value is a string containing the
3811 assembler operation to identify the following data as
3812 uninitialized global data. If not defined, and neither
3813 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
3814 uninitialized global data will be output in the data section if
3815 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
3817 #define BSS_SECTION_ASM_OP "\t.bss"
3819 /* If defined, a C expression whose value is a string containing the
3820 assembler operation to identify the following data as
3821 uninitialized global shared data. If not defined, and
3822 `BSS_SECTION_ASM_OP' is, the latter will be used. */
3823 /* #define SHARED_BSS_SECTION_ASM_OP */
3825 /* A list of names for sections other than the standard two, which are
3826 `in_text' and `in_data'. You need not define this macro on a system with no
3827 other sections (that GCC needs to use).
3829 Defined in svr4.h. */
3830 /* #define EXTRA_SECTIONS */
3832 /* One or more functions to be defined in `varasm.c'. These functions should
3833 do jobs analogous to those of `text_section' and `data_section', for your
3834 additional sections. Do not define this macro if you do not define
3837 Defined in svr4.h. */
3838 /* #define EXTRA_SECTION_FUNCTIONS */
3840 /* On most machines, read-only variables, constants, and jump tables are placed
3841 in the text section. If this is not the case on your machine, this macro
3842 should be defined to be the name of a function (either `data_section' or a
3843 function defined in `EXTRA_SECTIONS') that switches to the section to be
3844 used for read-only items.
3846 If these items should be placed in the text section, this macro should not
3848 /* #define READONLY_DATA_SECTION */
3850 /* A C statement or statements to switch to the appropriate section for output
3851 of EXP. You can assume that EXP is either a `VAR_DECL' node or a constant
3852 of some sort. RELOC indicates whether the initial value of EXP requires
3853 link-time relocations. Select the section by calling `text_section' or one
3854 of the alternatives for other sections.
3856 Do not define this macro if you put all read-only variables and constants in
3857 the read-only data section (usually the text section).
3859 Defined in svr4.h. */
3860 /* #define SELECT_SECTION(EXP, RELOC) */
3862 /* A C statement or statements to switch to the appropriate section for output
3863 of RTX in mode MODE. You can assume that RTX is some kind of constant in
3864 RTL. The argument MODE is redundant except in the case of a `const_int'
3865 rtx. Select the section by calling `text_section' or one of the
3866 alternatives for other sections.
3868 Do not define this macro if you put all constants in the read-only data
3871 Defined in svr4.h. */
3872 /* #define SELECT_RTX_SECTION(MODE, RTX) */
3874 /* Define this macro if jump tables (for `tablejump' insns) should be output in
3875 the text section, along with the assembler instructions. Otherwise, the
3876 readonly data section is used.
3878 This macro is irrelevant if there is no separate readonly data section. */
3879 /* #define JUMP_TABLES_IN_TEXT_SECTION */
3881 /* Define this macro if references to a symbol must be treated differently
3882 depending on something about the variable or function named by the symbol
3883 (such as what section it is in).
3885 The macro definition, if any, is executed immediately after the rtl for DECL
3886 has been created and stored in `DECL_RTL (DECL)'. The value of the rtl will
3887 be a `mem' whose address is a `symbol_ref'.
3889 The usual thing for this macro to do is to record a flag in the `symbol_ref'
3890 (such as `SYMBOL_REF_FLAG') or to store a modified name string in the
3891 `symbol_ref' (if one bit is not enough information). */
3892 /* #define ENCODE_SECTION_INFO(DECL) */
3894 /* Decode SYM_NAME and store the real name part in VAR, sans the characters
3895 that encode section info. Define this macro if `ENCODE_SECTION_INFO' alters
3896 the symbol's name string. */
3897 /* #define STRIP_NAME_ENCODING(VAR, SYM_NAME) */
3899 /* A C expression which evaluates to true if DECL should be placed
3900 into a unique section for some target-specific reason. If you do
3901 not define this macro, the default is `0'. Note that the flag
3902 `-ffunction-sections' will also cause functions to be placed into
3905 Defined in svr4.h. */
3906 /* #define UNIQUE_SECTION_P(DECL) */
3908 /* A C statement to build up a unique section name, expressed as a
3909 STRING_CST node, and assign it to `DECL_SECTION_NAME (DECL)'.
3910 RELOC indicates whether the initial value of EXP requires
3911 link-time relocations. If you do not define this macro, GNU CC
3912 will use the symbol name prefixed by `.' as the section name.
3914 Defined in svr4.h. */
3915 /* #define UNIQUE_SECTION(DECL, RELOC) */
3918 /* Position Independent Code. */
3920 /* The register number of the register used to address a table of static data
3921 addresses in memory. In some cases this register is defined by a
3922 processor's "application binary interface" (ABI). When this macro is
3923 defined, RTL is generated for this register once, as with the stack pointer
3924 and frame pointer registers. If this macro is not defined, it is up to the
3925 machine-dependent files to allocate such a register (if necessary). */
3926 /* #define PIC_OFFSET_TABLE_REGNUM */
3928 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
3929 clobbered by calls. Do not define this macro if `PIC_OFFSET_TABLE_REGNUM'
3931 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */
3933 /* By generating position-independent code, when two different programs (A and
3934 B) share a common library (libC.a), the text of the library can be shared
3935 whether or not the library is linked at the same address for both programs.
3936 In some of these environments, position-independent code requires not only
3937 the use of different addressing modes, but also special code to enable the
3938 use of these addressing modes.
3940 The `FINALIZE_PIC' macro serves as a hook to emit these special codes once
3941 the function is being compiled into assembly code, but not before. (It is
3942 not done before, because in the case of compiling an inline function, it
3943 would lead to multiple PIC prologues being included in functions which used
3944 inline functions and were compiled to assembly language.) */
3945 /* #define FINALIZE_PIC */
3947 /* A C expression that is nonzero if X is a legitimate immediate operand on the
3948 target machine when generating position independent code. You can assume
3949 that X satisfies `CONSTANT_P', so you need not check this. You can also
3950 assume FLAG_PIC is true, so you need not check it either. You need not
3951 define this macro if all constants (including `SYMBOL_REF') can be immediate
3952 operands when generating position independent code. */
3953 /* #define LEGITIMATE_PIC_OPERAND_P(X) */
3956 /* The Overall Framework of an Assembler File. */
3958 /* A C expression which outputs to the stdio stream STREAM some appropriate
3959 text to go at the start of an assembler file.
3961 Normally this macro is defined to output a line containing `#NO_APP', which
3962 is a comment that has no effect on most assemblers but tells the GNU
3963 assembler that it can save time by not checking for certain assembler
3966 On systems that use SDB, it is necessary to output certain commands; see
3969 Defined in svr4.h. */
3971 /* #define ASM_FILE_START(STREAM) \
3972 output_file_directive ((STREAM), main_input_filename) */
3974 /* A C expression which outputs to the stdio stream STREAM some appropriate
3975 text to go at the end of an assembler file.
3977 If this macro is not defined, the default is to output nothing special at
3978 the end of the file. Most systems don't require any definition.
3980 On systems that use SDB, it is necessary to output certain commands; see
3983 Defined in svr4.h. */
3984 /* #define ASM_FILE_END(STREAM) */
3986 /* A C string constant describing how to begin a comment in the target
3987 assembler language. The compiler assumes that the comment will end at the
3989 #define ASM_COMMENT_START ";"
3991 /* A C string constant for text to be output before each `asm' statement or
3992 group of consecutive ones. Normally this is `"#APP"', which is a comment
3993 that has no effect on most assemblers but tells the GNU assembler that it
3994 must check the lines that follow for all valid assembler constructs. */
3995 #define ASM_APP_ON "#APP\n"
3997 /* A C string constant for text to be output after each `asm' statement or
3998 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
3999 GNU assembler to resume making the time-saving assumptions that are valid
4000 for ordinary compiler output. */
4001 #define ASM_APP_OFF "#NO_APP\n"
4003 /* A C statement to output COFF information or DWARF debugging information
4004 which indicates that filename NAME is the current source file to the stdio
4007 This macro need not be defined if the standard form of output for the file
4008 format in use is appropriate. */
4009 /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
4011 /* A C statement to output DBX or SDB debugging information before code for
4012 line number LINE of the current source file to the stdio stream STREAM.
4014 This macro need not be defined if the standard form of debugging information
4015 for the debugger in use is appropriate.
4017 Defined in svr4.h. */
4018 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */
4020 /* A C statement to output something to the assembler file to handle a `#ident'
4021 directive containing the text STRING. If this macro is not defined, nothing
4022 is output for a `#ident' directive.
4024 Defined in svr4.h. */
4025 /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */
4027 /* A C statement to output something to the assembler file to switch to section
4028 NAME for object DECL which is either a `FUNCTION_DECL', a `VAR_DECL' or
4029 `NULL_TREE'. Some target formats do not support arbitrary sections. Do not
4030 define this macro in such cases.
4032 At present this macro is only used to support section attributes. When this
4033 macro is undefined, section attributes are disabled.
4035 Defined in svr4.h. */
4036 /* #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME) */
4038 /* A C statement to output any assembler statements which are required to
4039 precede any Objective C object definitions or message sending. The
4040 statement is executed only when compiling an Objective C program. */
4041 /* #define OBJC_PROLOGUE */
4044 /* Output of Data. */
4046 /* A C statement to output to the stdio stream STREAM an assembler instruction
4047 to assemble a floating-point constant of `TFmode', `DFmode', `SFmode',
4048 `TQFmode', `HFmode', or `QFmode', respectively, whose value is VALUE. VALUE
4049 will be a C expression of type `REAL_VALUE_TYPE'. Macros such as
4050 `REAL_VALUE_TO_TARGET_DOUBLE' are useful for writing these definitions. */
4052 /* #define ASM_OUTPUT_LONG_DOUBLE(STREAM, VALUE) */
4054 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
4056 if (REAL_VALUE_ISINF (VALUE) \
4057 || REAL_VALUE_ISNAN (VALUE) \
4058 || REAL_VALUE_MINUS_ZERO (VALUE)) \
4061 REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \
4062 fprintf (FILE, "\t.long 0x%lx\n\t.long 0x%lx\n", \
4063 t[0] & 0xffffffff, t[1] & 0xffffffff); \
4068 REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", str); \
4069 fprintf (FILE, "\t.double 0d%s\n", str); \
4073 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
4075 if (REAL_VALUE_ISINF (VALUE) \
4076 || REAL_VALUE_ISNAN (VALUE) \
4077 || REAL_VALUE_MINUS_ZERO (VALUE)) \
4080 REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
4081 fprintf (FILE, "\t.long 0x%lx\n", t & 0xffffffff); \
4086 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \
4087 fprintf (FILE, "\t.float 0d%s\n", str); \
4091 /* #define ASM_OUTPUT_THREE_QUARTER_FLOAT(STREAM, VALUE) */
4092 /* #define ASM_OUTPUT_SHORT_FLOAT(STREAM, VALUE) */
4093 /* #define ASM_OUTPUT_BYTE_FLOAT(STREAM, VALUE) */
4095 /* A C statement to output to the stdio stream STREAM an assembler instruction
4096 to assemble an integer of 16, 8, 4, 2 or 1 bytes, respectively, whose value
4097 is VALUE. The argument EXP will be an RTL expression which represents a
4098 constant value. Use `output_addr_const (STREAM, EXP)' to output this value
4099 as an assembler expression.
4101 For sizes larger than `UNITS_PER_WORD', if the action of a macro would be
4102 identical to repeatedly calling the macro corresponding to a size of
4103 `UNITS_PER_WORD', once for each word, you need not define the macro. */
4105 /* #define ASM_OUTPUT_QUADRUPLE_INT(STREAM, EXP) */
4106 /* #define ASM_OUTPUT_DOUBLE_INT(STREAM, EXP) */
4108 #define ASM_OUTPUT_INT(STREAM, EXP) \
4110 fputs ("\t.word ", STREAM); \
4111 output_addr_const (STREAM, EXP); \
4112 putc ('\n', STREAM); \
4115 #define ASM_OUTPUT_SHORT(STREAM, EXP) \
4117 fputs ("\t.hword ", STREAM); \
4118 output_addr_const (STREAM, EXP); \
4119 putc ('\n', STREAM); \
4122 #define ASM_OUTPUT_CHAR(STREAM, EXP) \
4124 fputs ("\t.byte ", STREAM); \
4125 output_addr_const (STREAM, EXP); \
4126 putc ('\n', STREAM); \
4129 /* A C statement to output to the stdio stream STREAM an assembler instruction
4130 to assemble a single byte containing the number VALUE. */
4132 #define ASM_OUTPUT_BYTE(STREAM, VALUE) \
4133 fprintf (STREAM, "%s%d\n", ASM_BYTE_OP, (int)(VALUE))
4135 /* A C string constant giving the pseudo-op to use for a sequence of
4136 single-byte constants. If this macro is not defined, the default
4139 Defined in svr4.h. */
4140 /* #define ASM_BYTE_OP */
4142 /* A C statement to output to the stdio stream STREAM an assembler instruction
4143 to assemble a string constant containing the LEN bytes at PTR. PTR will be
4144 a C expression of type `char *' and LEN a C expression of type `int'.
4146 If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix
4147 assembler, do not define the macro `ASM_OUTPUT_ASCII'.
4149 Defined in svr4.h. */
4150 /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */
4152 /* You may define this macro as a C expression. You should define the
4153 expression to have a non-zero value if GNU CC should output the
4154 constant pool for a function before the code for the function, or
4155 a zero value if GNU CC should output the constant pool after the
4156 function. If you do not define this macro, the usual case, GNU CC
4157 will output the constant pool before the function. */
4158 /* #define CONSTANT_POOL_BEFORE_FUNCTION */
4160 /* A C statement to output assembler commands to define the start of the
4161 constant pool for a function. FUNNAME is a string giving the name of the
4162 function. Should the return type of the function be required, it can be
4163 obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that
4164 will be written immediately after this call.
4166 If no constant-pool prefix is required, the usual case, this macro need not
4168 /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */
4170 /* A C statement (with or without semicolon) to output a constant in the
4171 constant pool, if it needs special treatment. (This macro need not do
4172 anything for RTL expressions that can be output normally.)
4174 The argument FILE is the standard I/O stream to output the assembler code
4175 on. X is the RTL expression for the constant to output, and MODE is the
4176 machine mode (in case X is a `const_int'). ALIGN is the required alignment
4177 for the value X; you should output an assembler directive to force this much
4180 The argument LABELNO is a number to use in an internal label for the address
4181 of this pool entry. The definition of this macro is responsible for
4182 outputting the label definition at the proper place. Here is how to do
4185 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO);
4187 When you output a pool entry specially, you should end with a `goto' to the
4188 label JUMPTO. This will prevent the same pool entry from being output a
4189 second time in the usual manner.
4191 You need not define this macro if it would do nothing. */
4192 /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */
4194 /* Define this macro as a C expression which is nonzero if the constant EXP, of
4195 type `tree', should be output after the code for a function. The compiler
4196 will normally output all constants before the function; you need not define
4197 this macro if this is OK. */
4198 /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */
4200 /* A C statement to output assembler commands to at the end of the constant
4201 pool for a function. FUNNAME is a string giving the name of the function.
4202 Should the return type of the function be required, you can obtain it via
4203 FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote
4204 immediately before this call.
4206 If no constant-pool epilogue is required, the usual case, you need not
4207 define this macro. */
4208 /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */
4210 /* Define this macro as a C expression which is nonzero if C is used as a
4211 logical line separator by the assembler.
4213 If you do not define this macro, the default is that only the character `;'
4214 is treated as a logical line separator. */
4215 /* #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) */
4217 /* These macros are defined as C string constant, describing the syntax in the
4218 assembler for grouping arithmetic expressions. The following definitions
4219 are correct for most assemblers:
4221 #define ASM_OPEN_PAREN "("
4222 #define ASM_CLOSE_PAREN ")" */
4223 #define ASM_OPEN_PAREN "("
4224 #define ASM_CLOSE_PAREN ")"
4226 /* These macros are provided by `real.h' for writing the definitions of
4227 `ASM_OUTPUT_DOUBLE' and the like: */
4229 /* These translate X, of type `REAL_VALUE_TYPE', to the target's floating point
4230 representation, and store its bit pattern in the array of `long int' whose
4231 address is L. The number of elements in the output array is determined by
4232 the size of the desired target floating point data type: 32 bits of it go in
4233 each `long int' array element. Each array element holds 32 bits of the
4234 result, even if `long int' is wider than 32 bits on the host machine.
4236 The array element values are designed so that you can print them out using
4237 `fprintf' in the order they should appear in the target machine's memory. */
4238 /* #define REAL_VALUE_TO_TARGET_SINGLE(X, L) */
4239 /* #define REAL_VALUE_TO_TARGET_DOUBLE(X, L) */
4240 /* #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(X, L) */
4242 /* This macro converts X, of type `REAL_VALUE_TYPE', to a decimal number and
4243 stores it as a string into STRING. You must pass, as STRING, the address of
4244 a long enough block of space to hold the result.
4246 The argument FORMAT is a `printf'-specification that serves as a suggestion
4247 for how to format the output string. */
4248 /* #define REAL_VALUE_TO_DECIMAL(X, FORMAT, STRING) */
4251 /* Output of Uninitialized Variables. */
4253 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4254 assembler definition of a common-label named NAME whose size is SIZE bytes.
4255 The variable ROUNDED is the size rounded up to whatever alignment the caller
4258 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
4259 before and after that, output the additional assembler syntax for defining
4260 the name, and a newline.
4262 This macro controls how the assembler definitions of uninitialized global
4263 variables are output. */
4264 /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */
4266 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate,
4267 explicit argument. If you define this macro, it is used in place of
4268 `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required
4269 alignment of the variable. The alignment is specified as the number of
4272 Defined in svr4.h. */
4273 /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */
4275 /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument -
4276 the DECL of the variable to be output, if there is one. This macro can be
4277 called with DECL == NULL_TREE. If you define this macro, it is used in
4278 place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you
4279 more flexibility in handling the destination of the variable. */
4280 /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4282 /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used
4283 when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */
4284 /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */
4286 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4287 assembler definition of uninitialized global DECL named NAME whose size is
4288 SIZE bytes. The variable ROUNDED is the size rounded up to whatever
4289 alignment the caller wants.
4291 Try to use function `asm_output_bss' defined in `varasm.c' when defining
4292 this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to
4293 output the name itself; before and after that, output the additional
4294 assembler syntax for defining the name, and a newline.
4296 This macro controls how the assembler definitions of uninitialized global
4297 variables are output. This macro exists to properly support languages like
4298 `c++' which do not have `common' data. However, this macro currently is not
4299 defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not
4300 defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or
4301 `ASM_OUTPUT_DECL_COMMON' is used. */
4302 /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
4304 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate,
4305 explicit argument. If you define this macro, it is used in place of
4306 `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required
4307 alignment of the variable. The alignment is specified as the number of
4310 Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when
4311 defining this macro. */
4312 /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4314 /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when
4315 NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */
4316 /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
4318 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4319 assembler definition of a local-common-label named NAME whose size is SIZE
4320 bytes. The variable ROUNDED is the size rounded up to whatever alignment
4323 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
4324 before and after that, output the additional assembler syntax for defining
4325 the name, and a newline.
4327 This macro controls how the assembler definitions of uninitialized static
4328 variables are output. */
4329 /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */
4331 /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate,
4332 explicit argument. If you define this macro, it is used in place of
4333 `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required
4334 alignment of the variable. The alignment is specified as the number of
4337 Defined in svr4.h. */
4338 /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */
4340 /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional
4341 parameter - the DECL of variable to be output, if there is one.
4342 This macro can be called with DECL == NULL_TREE. If you define
4343 this macro, it is used in place of `ASM_OUTPUT_LOCAL' and
4344 `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in
4345 handling the destination of the variable. */
4346 /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
4348 /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when
4349 NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */
4350 /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */
4353 /* Output and Generation of Labels. */
4355 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
4356 assembler definition of a label named NAME. Use the expression
4357 `assemble_name (STREAM, NAME)' to output the name itself; before and after
4358 that, output the additional assembler syntax for defining the name, and a
4361 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
4363 assemble_name (STREAM, NAME); \
4364 fputs (":\n", STREAM); \
4367 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4368 necessary for declaring the name NAME of a function which is being defined.
4369 This macro is responsible for outputting the label definition (perhaps using
4370 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node
4371 representing the function.
4373 If this macro is not defined, then the function name is defined in the usual
4374 manner as a label (by means of `ASM_OUTPUT_LABEL').
4376 Defined in svr4.h. */
4377 /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */
4379 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4380 necessary for declaring the size of a function which is being defined. The
4381 argument NAME is the name of the function. The argument DECL is the
4382 `FUNCTION_DECL' tree node representing the function.
4384 If this macro is not defined, then the function size is not defined.
4386 Defined in svr4.h. */
4387 /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */
4389 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4390 necessary for declaring the name NAME of an initialized variable which is
4391 being defined. This macro must output the label definition (perhaps using
4392 `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node
4393 representing the variable.
4395 If this macro is not defined, then the variable name is defined in the usual
4396 manner as a label (by means of `ASM_OUTPUT_LABEL').
4398 Defined in svr4.h. */
4399 /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */
4401 /* A C statement (sans semicolon) to finish up declaring a variable name once
4402 the compiler has processed its initializer fully and thus has had a chance
4403 to determine the size of an array when controlled by an initializer. This
4404 is used on systems where it's necessary to declare something about the size
4407 If you don't define this macro, that is equivalent to defining it to do
4410 Defined in svr4.h. */
4411 /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */
4413 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4414 commands that will make the label NAME global; that is, available for
4415 reference from other files. Use the expression `assemble_name (STREAM,
4416 NAME)' to output the name itself; before and after that, output the
4417 additional assembler syntax for making that name global, and a newline. */
4419 #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \
4421 fputs ("\t.globl ", STREAM); \
4422 assemble_name (STREAM, NAME); \
4423 fputs ("\n", STREAM); \
4426 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4427 commands that will make the label NAME weak; that is, available for
4428 reference from other files but only used if no other definition is
4429 available. Use the expression `assemble_name (STREAM, NAME)' to output the
4430 name itself; before and after that, output the additional assembler syntax
4431 for making that name weak, and a newline.
4433 If you don't define this macro, GNU CC will not support weak symbols and you
4434 should not define the `SUPPORTS_WEAK' macro.
4436 Defined in svr4.h. */
4437 /* #define ASM_WEAKEN_LABEL */
4439 /* A C expression which evaluates to true if the target supports weak symbols.
4441 If you don't define this macro, `defaults.h' provides a default definition.
4442 If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise,
4443 it is `0'. Define this macro if you want to control weak symbol support
4444 with a compiler flag such as `-melf'. */
4445 /* #define SUPPORTS_WEAK */
4447 /* A C statement (sans semicolon) to mark DECL to be emitted as a
4448 public symbol such that extra copies in multiple translation units
4449 will be discarded by the linker. Define this macro if your object
4450 file format provides support for this concept, such as the `COMDAT'
4451 section flags in the Microsoft Windows PE/COFF format, and this
4452 support requires changes to DECL, such as putting it in a separate
4455 Defined in svr4.h. */
4456 /* #define MAKE_DECL_ONE_ONLY */
4458 /* A C expression which evaluates to true if the target supports one-only
4461 If you don't define this macro, `varasm.c' provides a default definition.
4462 If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1';
4463 otherwise, it is `0'. Define this macro if you want to control one-only
4464 symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag
4465 is enough to mark a declaration to be emitted as one-only. */
4466 /* #define SUPPORTS_ONE_ONLY */
4468 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4469 necessary for declaring the name of an external symbol named NAME which is
4470 referenced in this compilation but not defined. The value of DECL is the
4471 tree node for the declaration.
4473 This macro need not be defined if it does not need to output anything. The
4474 GNU assembler and most Unix assemblers don't require anything. */
4475 /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */
4477 /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to
4478 declare a library function name external. The name of the library function
4479 is given by SYMREF, which has type `rtx' and is a `symbol_ref'.
4481 This macro need not be defined if it does not need to output anything. The
4482 GNU assembler and most Unix assemblers don't require anything.
4484 Defined in svr4.h. */
4485 /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */
4487 /* A C statement (sans semicolon) to output to the stdio stream STREAM a
4488 reference in assembler syntax to a label named NAME. This should add `_' to
4489 the front of the name, if that is customary on your operating system, as it
4490 is in most Berkeley Unix systems. This macro is used in `assemble_name'. */
4491 /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */
4493 /* A C statement to output to the stdio stream STREAM a label whose name is
4494 made from the string PREFIX and the number NUM.
4496 It is absolutely essential that these labels be distinct from the labels
4497 used for user-level functions and variables. Otherwise, certain programs
4498 will have name conflicts with internal labels.
4500 It is desirable to exclude internal labels from the symbol table of the
4501 object file. Most assemblers have a naming convention for labels that
4502 should be excluded; on many systems, the letter `L' at the beginning of a
4503 label has this effect. You should find out what convention your system
4504 uses, and follow it.
4506 The usual definition of this macro is as follows:
4508 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM)
4510 Defined in svr4.h. */
4511 /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */
4513 /* A C statement to store into the string STRING a label whose name is made
4514 from the string PREFIX and the number NUM.
4516 This string, when output subsequently by `assemble_name', should produce the
4517 output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX
4520 If the string begins with `*', then `assemble_name' will output the rest of
4521 the string unchanged. It is often convenient for
4522 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't
4523 start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and
4524 may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your
4525 machine description, so you should know what it does on your machine.)
4527 Defined in svr4.h. */
4530 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
4532 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
4536 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
4537 newly allocated string made from the string NAME and the number NUMBER, with
4538 some suitable punctuation added. Use `alloca' to get space for the string.
4540 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
4541 an assembler label for an internal static variable whose name is NAME.
4542 Therefore, the string must be such as to result in valid assembler code.
4543 The argument NUMBER is different each time this macro is executed; it
4544 prevents conflicts between similarly-named internal static variables in
4547 Ideally this string should not be a valid C identifier, to prevent any
4548 conflict with the user's own symbols. Most assemblers allow periods or
4549 percent signs in assembler symbols; putting at least one of these between
4550 the name and the number will suffice. */
4552 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
4554 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
4555 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
4558 /* A C statement to output to the stdio stream STREAM assembler code which
4559 defines (equates) the symbol NAME to have the value VALUE.
4561 If SET_ASM_OP is defined, a default definition is provided which is correct
4564 Defined in svr4.h. */
4565 /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */
4567 /* A C statement to output to the stdio stream STREAM assembler code which
4568 defines (equates) the weak symbol NAME to have the value VALUE.
4570 Define this macro if the target only supports weak aliases; define
4571 ASM_OUTPUT_DEF instead if possible. */
4572 /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */
4574 /* Define this macro to override the default assembler names used for Objective
4577 The default name is a unique method number followed by the name of the class
4578 (e.g. `_1_Foo'). For methods in categories, the name of the category is
4579 also included in the assembler name (e.g. `_1_Foo_Bar').
4581 These names are safe on most systems, but make debugging difficult since the
4582 method's selector is not present in the name. Therefore, particular systems
4583 define other ways of computing names.
4585 BUF is an expression of type `char *' which gives you a buffer in which to
4586 store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME
4587 put together, plus 50 characters extra.
4589 The argument IS_INST specifies whether the method is an instance method or a
4590 class method; CLASS_NAME is the name of the class; CAT_NAME is the name of
4591 the category (or NULL if the method is not in a category); and SEL_NAME is
4592 the name of the selector.
4594 On systems where the assembler can handle quoted names, you can use this
4595 macro to provide more human-readable names. */
4596 /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */
4599 /* Macros Controlling Initialization Routines. */
4601 /* If defined, a C string constant for the assembler operation to identify the
4602 following data as initialization code. If not defined, GNU CC will assume
4603 such a section does not exist. When you are using special sections for
4604 initialization and termination functions, this macro also controls how
4605 `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions.
4607 Defined in svr4.h. */
4608 /* #define INIT_SECTION_ASM_OP */
4609 #undef INIT_SECTION_ASM_OP
4611 /* If defined, `main' will not call `__main' as described above. This macro
4612 should be defined for systems that control the contents of the init section
4613 on a symbol-by-symbol basis, such as OSF/1, and should not be defined
4614 explicitly for systems that support `INIT_SECTION_ASM_OP'. */
4615 /* #define HAS_INIT_SECTION */
4617 /* If defined, a C string constant for a switch that tells the linker that the
4618 following symbol is an initialization routine. */
4619 /* #define LD_INIT_SWITCH */
4621 /* If defined, a C string constant for a switch that tells the linker that the
4622 following symbol is a finalization routine. */
4623 /* #define LD_FINI_SWITCH */
4625 /* If defined, `main' will call `__main' despite the presence of
4626 `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the
4627 init section is not actually run automatically, but is still useful for
4628 collecting the lists of constructors and destructors. */
4629 #define INVOKE__main
4631 /* Define this macro as a C statement to output on the stream STREAM the
4632 assembler code to arrange to call the function named NAME at initialization
4635 Assume that NAME is the name of a C function generated automatically by the
4636 compiler. This function takes no arguments. Use the function
4637 `assemble_name' to output the name NAME; this performs any system-specific
4638 syntactic transformations such as adding an underscore.
4640 If you don't define this macro, nothing special is output to arrange to call
4641 the function. This is correct when the function will be called in some
4642 other manner--for example, by means of the `collect2' program, which looks
4643 through the symbol table to find these functions by their names.
4645 Defined in svr4.h. */
4646 /* #define ASM_OUTPUT_CONSTRUCTOR(STREAM, NAME) */
4648 /* This is like `ASM_OUTPUT_CONSTRUCTOR' but used for termination functions
4649 rather than initialization functions.
4651 Defined in svr4.h. */
4652 /* #define ASM_OUTPUT_DESTRUCTOR(STREAM, NAME) */
4654 /* If your system uses `collect2' as the means of processing constructors, then
4655 that program normally uses `nm' to scan an object file for constructor
4656 functions to be called. On certain kinds of systems, you can define these
4657 macros to make `collect2' work faster (and, in some cases, make it work at
4660 /* Define this macro if the system uses COFF (Common Object File Format) object
4661 files, so that `collect2' can assume this format and scan object files
4662 directly for dynamic constructor/destructor functions. */
4663 /* #define OBJECT_FORMAT_COFF */
4665 /* Define this macro if the system uses ROSE format object files, so that
4666 `collect2' can assume this format and scan object files directly for dynamic
4667 constructor/destructor functions.
4669 These macros are effective only in a native compiler; `collect2' as
4670 part of a cross compiler always uses `nm' for the target machine. */
4671 /* #define OBJECT_FORMAT_ROSE */
4673 /* Define this macro if the system uses ELF format object files.
4675 Defined in svr4.h. */
4676 /* #define OBJECT_FORMAT_ELF */
4678 /* Define this macro as a C string constant containing the file name to use to
4679 execute `nm'. The default is to search the path normally for `nm'.
4681 If your system supports shared libraries and has a program to list the
4682 dynamic dependencies of a given library or executable, you can define these
4683 macros to enable support for running initialization and termination
4684 functions in shared libraries: */
4685 /* #define REAL_NM_FILE_NAME */
4687 /* Define this macro to a C string constant containing the name of the program
4688 which lists dynamic dependencies, like `"ldd"' under SunOS 4. */
4689 /* #define LDD_SUFFIX */
4691 /* Define this macro to be C code that extracts filenames from the output of
4692 the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *'
4693 that points to the beginning of a line of output from `LDD_SUFFIX'. If the
4694 line lists a dynamic dependency, the code must advance PTR to the beginning
4695 of the filename on that line. Otherwise, it must set PTR to `NULL'. */
4696 /* #define PARSE_LDD_OUTPUT (PTR) */
4699 /* Output of Assembler Instructions. */
4701 /* A C initializer containing the assembler's names for the machine registers,
4702 each one as a C string constant. This is what translates register numbers
4703 in the compiler into assembler language. */
4704 #define REGISTER_NAMES \
4706 "r0", "r1", "r2", "r3", \
4707 "r4", "r5", "r6", "r7", \
4708 "r8", "r9", "r10", "r11", \
4709 "r12", "r13", "r14", "r15", \
4710 "r16", "r17", "r18", "r19", \
4711 "r20", "r21", "r22", "r23", \
4712 "r24", "r25", "r26", "r27", \
4713 "r28", "r29", "r30", "r31", \
4714 "r32", "r33", "r34", "r35", \
4715 "r36", "r37", "r38", "r39", \
4716 "r40", "r41", "r42", "r43", \
4717 "r44", "r45", "r46", "r47", \
4718 "r48", "r49", "r50", "r51", \
4719 "r52", "r53", "r54", "r55", \
4720 "r56", "r57", "r58", "r59", \
4721 "r60", "r61", "link", "sp", \
4723 "f0", "f1", "f2", "f3", \
4724 "s", "v", "va", "c", \
4726 "psw", "bpsw", "pc", "bpc", \
4727 "dpsw", "dpc", "rpt_c", "rpt_s", \
4728 "rpt_e", "mod_s", "mod_e", "iba", \
4729 "eit_vb", "int_s", "int_m", \
4732 /* If defined, a C initializer for an array of structures containing a name and
4733 a register number. This macro defines additional names for hard registers,
4734 thus allowing the `asm' option in declarations to refer to registers using
4736 #define ADDITIONAL_REGISTER_NAMES \
4738 {"r62", GPR_LINK}, \
4741 {"f5", FLAG_OVERFLOW}, \
4742 {"f6", FLAG_ACC_OVER}, \
4743 {"f7", FLAG_CARRY}, \
4744 {"carry", FLAG_CARRY}, \
4745 {"borrow", FLAG_BORROW}, \
4746 {"b", FLAG_BORROW}, \
4753 {"cr7", CR_RPT_C}, \
4754 {"cr8", CR_RPT_S}, \
4755 {"cr9", CR_RPT_E}, \
4756 {"cr10", CR_MOD_S}, \
4757 {"cr11", CR_MOD_E}, \
4759 {"cr15", CR_EIT_VB}, \
4760 {"cr16", CR_INT_S}, \
4761 {"cr17", CR_INT_M} \
4764 /* Define this macro if you are using an unusual assembler that requires
4765 different names for the machine instructions.
4767 The definition is a C statement or statements which output an assembler
4768 instruction opcode to the stdio stream STREAM. The macro-operand PTR is a
4769 variable of type `char *' which points to the opcode name in its "internal"
4770 form--the form that is written in the machine description. The definition
4771 should output the opcode name to STREAM, performing any translation you
4772 desire, and increment the variable PTR to point at the end of the opcode so
4773 that it will not be output twice.
4775 In fact, your macro definition may process less than the entire opcode name,
4776 or more than the opcode name; but if you want to process text that includes
4777 `%'-sequences to substitute operands, you must take care of the substitution
4778 yourself. Just be sure to increment PTR over whatever text should not be
4781 If you need to look at the operand values, they can be found as the elements
4782 of `recog_data.operand'.
4784 If the macro definition does nothing, the instruction is output in the usual
4786 /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */
4788 /* If defined, a C statement to be executed just prior to the output of
4789 assembler code for INSN, to modify the extracted operands so they will be
4792 Here the argument OPVEC is the vector containing the operands extracted from
4793 INSN, and NOPERANDS is the number of elements of the vector which contain
4794 meaningful data for this insn. The contents of this vector are what will be
4795 used to convert the insn template into assembler code, so you can change the
4796 assembler output by changing the contents of the vector.
4798 This macro is useful when various assembler syntaxes share a single file of
4799 instruction patterns; by defining this macro differently, you can cause a
4800 large class of instructions to be output differently (such as with
4801 rearranged operands). Naturally, variations in assembler syntax affecting
4802 individual insn patterns ought to be handled by writing conditional output
4803 routines in those patterns.
4805 If this macro is not defined, it is equivalent to a null statement. */
4806 /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */
4808 /* If defined, `FINAL_PRESCAN_INSN' will be called on each
4809 `CODE_LABEL'. In that case, OPVEC will be a null pointer and
4810 NOPERANDS will be zero. */
4811 /* #define FINAL_PRESCAN_LABEL */
4813 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4814 for an instruction operand X. X is an RTL expression.
4816 CODE is a value that can be used to specify one of several ways of printing
4817 the operand. It is used when identical operands must be printed differently
4818 depending on the context. CODE comes from the `%' specification that was
4819 used to request printing of the operand. If the specification was just
4820 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
4821 the ASCII code for LTR.
4823 If X is a register, this macro should print the register's name. The names
4824 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
4825 is initialized from `REGISTER_NAMES'.
4827 When the machine description has a specification `%PUNCT' (a `%' followed by
4828 a punctuation character), this macro is called with a null pointer for X and
4829 the punctuation character for CODE.
4831 Standard operand flags that are handled elsewhere:
4832 `=' Output a number unique to each instruction in the compilation.
4833 `a' Substitute an operand as if it were a memory reference.
4834 `c' Omit the syntax that indicates an immediate operand.
4835 `l' Substitute a LABEL_REF into a jump instruction.
4836 `n' Like %cDIGIT, except negate the value before printing.
4838 The d30v specific operand flags are:
4840 `f' Print a SF constant as an int.
4841 `s' Subtract 32 and negate.
4842 `A' Print accumulator number without an `a' in front of it.
4843 `B' Print bit offset for BSET, etc. instructions.
4844 `E' Print u if this is zero extend, nothing if this is sign extend.
4845 `F' Emit /{f,t,x}{f,t,x} for executing a false condition.
4846 `L' Print the lower half of a 64 bit item.
4847 `M' Print a memory reference for ld/st instructions.
4848 `R' Return appropriate cmp instruction for relational test.
4850 `T' Emit /{f,t,x}{f,t,x} for executing a true condition.
4851 `U' Print the upper half of a 64 bit item. */
4853 #define PRINT_OPERAND(STREAM, X, CODE) d30v_print_operand (STREAM, X, CODE)
4855 /* A C expression which evaluates to true if CODE is a valid punctuation
4856 character for use in the `PRINT_OPERAND' macro. If
4857 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
4858 characters (except for the standard one, `%') are used in this way. */
4860 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.' || (CODE) == ':')
4862 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4863 for an instruction operand that is a memory reference whose address is X. X
4864 is an RTL expression.
4866 On some machines, the syntax for a symbolic address depends on the section
4867 that the address refers to. On these machines, define the macro
4868 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
4869 then check for it here. *Note Assembler Format::. */
4871 #define PRINT_OPERAND_ADDRESS(STREAM, X) d30v_print_operand_address (STREAM, X)
4873 /* A C statement, to be executed after all slot-filler instructions have been
4874 output. If necessary, call `dbr_sequence_length' to determine the number of
4875 slots filled in a sequence (zero if not currently outputting a sequence), to
4876 decide how many no-ops to output, or whatever.
4878 Don't define this macro if it has nothing to do, but it is helpful in
4879 reading assembly output if the extent of the delay sequence is made explicit
4880 (e.g. with white space).
4882 Note that output routines for instructions with delay slots must be prepared
4883 to deal with not being output as part of a sequence (i.e. when the
4884 scheduling pass is not run, or when no slot fillers could be found.) The
4885 variable `final_sequence' is null when not processing a sequence, otherwise
4886 it contains the `sequence' rtx being output. */
4887 /* #define DBR_OUTPUT_SEQEND(FILE) */
4889 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
4890 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
4891 single `md' file must support multiple assembler formats. In that case, the
4892 various `tm.h' files can define these macros differently.
4894 USER_LABEL_PREFIX is defined in svr4.h. */
4896 #define REGISTER_PREFIX "%"
4897 #define LOCAL_LABEL_PREFIX "."
4898 #define USER_LABEL_PREFIX ""
4899 #define IMMEDIATE_PREFIX ""
4901 /* If your target supports multiple dialects of assembler language (such as
4902 different opcodes), define this macro as a C expression that gives the
4903 numeric index of the assembler language dialect to use, with zero as the
4906 If this macro is defined, you may use `{option0|option1|option2...}'
4907 constructs in the output templates of patterns (*note Output Template::.) or
4908 in the first argument of `asm_fprintf'. This construct outputs `option0',
4909 `option1' or `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero,
4910 one or two, etc. Any special characters within these strings retain their
4913 If you do not define this macro, the characters `{', `|' and `}' do not have
4914 any special meaning when used in templates or operands to `asm_fprintf'.
4916 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
4917 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations
4918 in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT'
4919 and use the `{option0|option1}' syntax if the syntax variant are larger and
4920 involve such things as different opcodes or operand order. */
4921 /* #define ASSEMBLER_DIALECT */
4923 /* A C expression to output to STREAM some assembler code which will push hard
4924 register number REGNO onto the stack. The code need not be optimal, since
4925 this macro is used only when profiling. */
4926 /* #define ASM_OUTPUT_REG_PUSH (STREAM, REGNO) */
4928 /* A C expression to output to STREAM some assembler code which will pop hard
4929 register number REGNO off of the stack. The code need not be optimal, since
4930 this macro is used only when profiling. */
4931 /* #define ASM_OUTPUT_REG_POP (STREAM, REGNO) */
4934 /* Output of dispatch tables. */
4936 /* This macro should be provided on machines where the addresses in a dispatch
4937 table are relative to the table's own address.
4939 The definition should be a C statement to output to the stdio stream STREAM
4940 an assembler pseudo-instruction to generate a difference between two labels.
4941 VALUE and REL are the numbers of two internal labels. The definitions of
4942 these labels are output using `ASM_OUTPUT_INTERNAL_LABEL', and they must be
4943 printed in the same way here. For example,
4945 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */
4947 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
4948 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
4950 /* This macro should be provided on machines where the addresses in a dispatch
4953 The definition should be a C statement to output to the stdio stream STREAM
4954 an assembler pseudo-instruction to generate a reference to a label. VALUE
4955 is the number of an internal label whose definition is output using
4956 `ASM_OUTPUT_INTERNAL_LABEL'. For example,
4958 fprintf (STREAM, "\t.word L%d\n", VALUE) */
4960 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
4961 fprintf (STREAM, "\t.word .L%d\n", VALUE)
4963 /* Define this if the label before a jump-table needs to be output specially.
4964 The first three arguments are the same as for `ASM_OUTPUT_INTERNAL_LABEL';
4965 the fourth argument is the jump-table which follows (a `jump_insn'
4966 containing an `addr_vec' or `addr_diff_vec').
4968 This feature is used on system V to output a `swbeg' statement for the
4971 If this macro is not defined, these labels are output with
4972 `ASM_OUTPUT_INTERNAL_LABEL'.
4974 Defined in svr4.h. */
4975 /* #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) */
4977 /* Define this if something special must be output at the end of a jump-table.
4978 The definition should be a C statement to be executed after the assembler
4979 code for the table is written. It should write the appropriate code to
4980 stdio stream STREAM. The argument TABLE is the jump-table insn, and NUM is
4981 the label-number of the preceding label.
4983 If this macro is not defined, nothing special is output at the end of the
4985 /* #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) */
4988 /* Assembler Commands for Exception Regions. */
4990 /* A C expression to output text to mark the start of an exception region.
4992 This macro need not be defined on most platforms. */
4993 /* #define ASM_OUTPUT_EH_REGION_BEG() */
4995 /* A C expression to output text to mark the end of an exception region.
4997 This macro need not be defined on most platforms. */
4998 /* #define ASM_OUTPUT_EH_REGION_END() */
5000 /* A C expression to switch to the section in which the main exception table is
5001 to be placed (*note Sections::.). The default is a section named
5002 `.gcc_except_table' on machines that support named sections via
5003 `ASM_OUTPUT_SECTION_NAME', otherwise if `-fpic' or `-fPIC' is in effect, the
5004 `data_section', otherwise the `readonly_data_section'. */
5005 /* #define EXCEPTION_SECTION() */
5007 /* If defined, a C string constant for the assembler operation to switch to the
5008 section for exception handling frame unwind information. If not defined,
5009 GNU CC will provide a default definition if the target supports named
5010 sections. `crtstuff.c' uses this macro to switch to the appropriate
5013 You should define this symbol if your target supports DWARF 2 frame unwind
5014 information and the default definition does not work. */
5015 /* #define EH_FRAME_SECTION_ASM_OP */
5017 /* A C expression that is nonzero if the normal exception table output should
5020 This macro need not be defined on most platforms. */
5021 /* #define OMIT_EH_TABLE() */
5023 /* Alternate runtime support for looking up an exception at runtime and finding
5024 the associated handler, if the default method won't work.
5026 This macro need not be defined on most platforms. */
5027 /* #define EH_TABLE_LOOKUP() */
5029 /* A C expression that decides whether or not the current function needs to
5030 have a function unwinder generated for it. See the file `except.c' for
5031 details on when to define this, and how. */
5032 /* #define DOESNT_NEED_UNWINDER */
5034 /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it
5035 does not contain any extraneous set bits in it. */
5036 /* #define MASK_RETURN_ADDR */
5038 /* Define this macro to 0 if your target supports DWARF 2 frame unwind
5039 information, but it does not yet work with exception handling. Otherwise,
5040 if your target supports this information (if it defines
5041 `INCOMING_RETURN_ADDR_RTX' and either `UNALIGNED_INT_ASM_OP' or
5042 `OBJECT_FORMAT_ELF'), GCC will provide a default definition of 1.
5044 If this macro is defined to 1, the DWARF 2 unwinder will be the default
5045 exception handling mechanism; otherwise, setjmp/longjmp will be used by
5048 If this macro is defined to anything, the DWARF 2 unwinder will be used
5049 instead of inline unwinders and __unwind_function in the non-setjmp case. */
5050 /* #define DWARF2_UNWIND_INFO */
5053 /* Assembler Commands for Alignment. */
5055 /* The alignment (log base 2) to put in front of LABEL, which follows
5058 This macro need not be defined if you don't want any special alignment to be
5059 done at such a time. Most machine descriptions do not currently define the
5061 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
5063 /* The desired alignment for the location counter at the beginning
5066 This macro need not be defined if you don't want any special alignment to be
5067 done at such a time. Most machine descriptions do not currently define the
5069 /* #define LOOP_ALIGN(LABEL) */
5071 /* A C statement to output to the stdio stream STREAM an assembler instruction
5072 to advance the location counter by NBYTES bytes. Those bytes should be zero
5073 when loaded. NBYTES will be a C expression of type `int'.
5075 Defined in svr4.h. */
5076 /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
5077 fprintf (STREAM, "\t.zero\t%u\n", (NBYTES)) */
5079 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
5080 section because it fails put zeros in the bytes that are skipped. This is
5081 true on many Unix systems, where the pseudo-op to skip bytes produces no-op
5082 instructions rather than zeros when used in the text section. */
5083 /* #define ASM_NO_SKIP_IN_TEXT */
5085 /* A C statement to output to the stdio stream STREAM an assembler command to
5086 advance the location counter to a multiple of 2 to the POWER bytes. POWER
5087 will be a C expression of type `int'. */
5088 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
5089 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
5092 /* Macros Affecting all Debug Formats. */
5094 /* A C expression that returns the DBX register number for the compiler
5095 register number REGNO. In simple cases, the value of this expression may be
5096 REGNO itself. But sometimes there are some registers that the compiler
5097 knows about and DBX does not, or vice versa. In such cases, some register
5098 may need to have one number in the compiler and another for DBX.
5100 If two registers have consecutive numbers inside GNU CC, and they can be
5101 used as a pair to hold a multiword value, then they *must* have consecutive
5102 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers
5103 will be unable to access such a pair, because they expect register pairs to
5104 be consecutive in their own numbering scheme.
5106 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not
5107 preserve register pairs, then what you must do instead is redefine the
5108 actual register numbering scheme. */
5109 #define DBX_REGISTER_NUMBER(REGNO) \
5110 (GPR_P (REGNO) ? ((REGNO) - GPR_FIRST) \
5111 : ACCUM_P (REGNO) ? ((REGNO) - ACCUM_FIRST + 84) \
5112 : FLAG_P (REGNO) ? 66 /* return psw for all flags */ \
5113 : (REGNO) == ARG_POINTER_REGNUM ? (GPR_SP - GPR_FIRST) \
5114 : (REGNO) == CR_PSW ? (66 + 0) \
5115 : (REGNO) == CR_BPSW ? (66 + 1) \
5116 : (REGNO) == CR_PC ? (66 + 2) \
5117 : (REGNO) == CR_BPC ? (66 + 3) \
5118 : (REGNO) == CR_DPSW ? (66 + 4) \
5119 : (REGNO) == CR_DPC ? (66 + 5) \
5120 : (REGNO) == CR_RPT_C ? (66 + 7) \
5121 : (REGNO) == CR_RPT_S ? (66 + 8) \
5122 : (REGNO) == CR_RPT_E ? (66 + 9) \
5123 : (REGNO) == CR_MOD_S ? (66 + 10) \
5124 : (REGNO) == CR_MOD_E ? (66 + 11) \
5125 : (REGNO) == CR_IBA ? (66 + 14) \
5126 : (REGNO) == CR_EIT_VB ? (66 + 15) \
5127 : (REGNO) == CR_INT_S ? (66 + 16) \
5128 : (REGNO) == CR_INT_M ? (66 + 17) \
5131 /* A C expression that returns the integer offset value for an automatic
5132 variable having address X (an RTL expression). The default computation
5133 assumes that X is based on the frame-pointer and gives the offset from the
5134 frame-pointer. This is required for targets that produce debugging output
5135 for DBX or COFF-style debugging output for SDB and allow the frame-pointer
5136 to be eliminated when the `-g' options is used. */
5137 /* #define DEBUGGER_AUTO_OFFSET(X) */
5139 /* A C expression that returns the integer offset value for an argument having
5140 address X (an RTL expression). The nominal offset is OFFSET. */
5141 /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */
5143 /* A C expression that returns the type of debugging output GNU CC produces
5144 when the user specifies `-g' or `-ggdb'. Define this if you have arranged
5145 for GNU CC to support more than one format of debugging output. Currently,
5146 the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG',
5147 `DWARF2_DEBUG', and `XCOFF_DEBUG'.
5149 The value of this macro only affects the default debugging output; the user
5150 can always get a specific type of output by using `-gstabs', `-gcoff',
5151 `-gdwarf-1', `-gdwarf-2', or `-gxcoff'.
5153 Defined in svr4.h. */
5155 #undef PREFERRED_DEBUGGING_TYPE
5156 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
5159 /* Specific Options for DBX Output. */
5161 /* Define this macro if GNU CC should produce debugging output for DBX in
5162 response to the `-g' option.
5164 Defined in svr4.h. */
5165 /* #define DBX_DEBUGGING_INFO */
5167 /* Define this macro if GNU CC should produce XCOFF format debugging output in
5168 response to the `-g' option. This is a variant of DBX format. */
5169 /* #define XCOFF_DEBUGGING_INFO */
5171 /* Define this macro to control whether GNU CC should by default generate GDB's
5172 extended version of DBX debugging information (assuming DBX-format debugging
5173 information is enabled at all). If you don't define the macro, the default
5174 is 1: always generate the extended information if there is any occasion to. */
5175 /* #define DEFAULT_GDB_EXTENSIONS */
5177 /* Define this macro if all `.stabs' commands should be output while in the
5179 /* #define DEBUG_SYMS_TEXT */
5181 /* A C string constant naming the assembler pseudo op to use instead of
5182 `.stabs' to define an ordinary debugging symbol. If you don't define this
5183 macro, `.stabs' is used. This macro applies only to DBX debugging
5184 information format. */
5185 /* #define ASM_STABS_OP */
5187 /* A C string constant naming the assembler pseudo op to use instead of
5188 `.stabd' to define a debugging symbol whose value is the current location.
5189 If you don't define this macro, `.stabd' is used. This macro applies only
5190 to DBX debugging information format. */
5191 /* #define ASM_STABD_OP */
5193 /* A C string constant naming the assembler pseudo op to use instead of
5194 `.stabn' to define a debugging symbol with no name. If you don't define
5195 this macro, `.stabn' is used. This macro applies only to DBX debugging
5196 information format. */
5197 /* #define ASM_STABN_OP */
5199 /* Define this macro if DBX on your system does not support the construct
5200 `xsTAGNAME'. On some systems, this construct is used to describe a forward
5201 reference to a structure named TAGNAME. On other systems, this construct is
5202 not supported at all. */
5203 /* #define DBX_NO_XREFS */
5205 /* A symbol name in DBX-format debugging information is normally continued
5206 (split into two separate `.stabs' directives) when it exceeds a certain
5207 length (by default, 80 characters). On some operating systems, DBX requires
5208 this splitting; on others, splitting must not be done. You can inhibit
5209 splitting by defining this macro with the value zero. You can override the
5210 default splitting-length by defining this macro as an expression for the
5211 length you desire. */
5212 /* #define DBX_CONTIN_LENGTH */
5214 /* Normally continuation is indicated by adding a `\' character to the end of a
5215 `.stabs' string when a continuation follows. To use a different character
5216 instead, define this macro as a character constant for the character you
5217 want to use. Do not define this macro if backslash is correct for your
5219 /* #define DBX_CONTIN_CHAR */
5221 /* Define this macro if it is necessary to go to the data section before
5222 outputting the `.stabs' pseudo-op for a non-global static variable. */
5223 /* #define DBX_STATIC_STAB_DATA_SECTION */
5225 /* The value to use in the "code" field of the `.stabs' directive for a
5226 typedef. The default is `N_LSYM'. */
5227 /* #define DBX_TYPE_DECL_STABS_CODE */
5229 /* The value to use in the "code" field of the `.stabs' directive for a static
5230 variable located in the text section. DBX format does not provide any
5231 "right" way to do this. The default is `N_FUN'. */
5232 /* #define DBX_STATIC_CONST_VAR_CODE */
5234 /* The value to use in the "code" field of the `.stabs' directive for a
5235 parameter passed in registers. DBX format does not provide any "right" way
5236 to do this. The default is `N_RSYM'. */
5237 /* #define DBX_REGPARM_STABS_CODE */
5239 /* The letter to use in DBX symbol data to identify a symbol as a parameter
5240 passed in registers. DBX format does not customarily provide any way to do
5241 this. The default is `'P''. */
5242 /* #define DBX_REGPARM_STABS_LETTER */
5244 /* The letter to use in DBX symbol data to identify a symbol as a stack
5245 parameter. The default is `'p''. */
5246 /* #define DBX_MEMPARM_STABS_LETTER */
5248 /* Define this macro if the DBX information for a function and its arguments
5249 should precede the assembler code for the function. Normally, in DBX
5250 format, the debugging information entirely follows the assembler code.
5252 Defined in svr4.h. */
5253 /* #define DBX_FUNCTION_FIRST */
5255 /* Define this macro if the `N_LBRAC' symbol for a block should precede the
5256 debugging information for variables and functions defined in that block.
5257 Normally, in DBX format, the `N_LBRAC' symbol comes first. */
5258 /* #define DBX_LBRAC_FIRST */
5260 /* Define this macro if the value of a symbol describing the scope of a block
5261 (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing
5262 function. Normally, GNU C uses an absolute address.
5264 Defined in svr4.h. */
5265 /* #define DBX_BLOCKS_FUNCTION_RELATIVE */
5267 /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL'
5268 stabs for included header files, as on Sun systems. This macro
5269 also directs GNU C to output a type number as a pair of a file
5270 number and a type number within the file. Normally, GNU C does not
5271 generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single
5272 number for a type number. */
5273 /* #define DBX_USE_BINCL */
5276 /* Open ended Hooks for DBX Output. */
5278 /* Define this macro to say how to output to STREAM the debugging information
5279 for the start of a scope level for variable names. The argument NAME is the
5280 name of an assembler symbol (for use with `assemble_name') whose value is
5281 the address where the scope begins. */
5282 /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */
5284 /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */
5285 /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */
5287 /* Define this macro if the target machine requires special handling to output
5288 an enumeration type. The definition should be a C statement (sans
5289 semicolon) to output the appropriate information to STREAM for the type
5291 /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */
5293 /* Define this macro if the target machine requires special output at the end
5294 of the debugging information for a function. The definition should be a C
5295 statement (sans semicolon) to output the appropriate information to STREAM.
5296 FUNCTION is the `FUNCTION_DECL' node for the function. */
5297 /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */
5299 /* Define this macro if you need to control the order of output of the standard
5300 data types at the beginning of compilation. The argument SYMS is a `tree'
5301 which is a chain of all the predefined global symbols, including names of
5304 Normally, DBX output starts with definitions of the types for integers and
5305 characters, followed by all the other predefined types of the particular
5306 language in no particular order.
5308 On some machines, it is necessary to output different particular types
5309 first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those
5310 symbols in the necessary order. Any predefined types that you don't
5311 explicitly output will be output afterward in no particular order.
5313 Be careful not to define this macro so that it works only for C. There are
5314 no global variables to access most of the built-in types, because another
5315 language may have another set of types. The way to output a particular type
5316 is to look through SYMS to see if you can find it. Here is an example:
5320 for (decl = syms; decl; decl = TREE_CHAIN (decl))
5321 if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
5323 dbxout_symbol (decl);
5327 This does nothing if the expected type does not exist.
5329 See the function `init_decl_processing' in `c-decl.c' to find the names to
5330 use for all the built-in C types. */
5331 /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */
5333 /* Some stabs encapsulation formats (in particular ECOFF), cannot
5334 handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx
5335 extention construct. On those machines, define this macro to turn
5336 this feature off without disturbing the rest of the gdb extensions. */
5337 /* #define NO_DBX_FUNCTION_END */
5340 /* File names in DBX format. */
5342 /* Define this if DBX wants to have the current directory recorded in each
5345 Note that the working directory is always recorded if GDB extensions are
5347 /* #define DBX_WORKING_DIRECTORY */
5349 /* A C statement to output DBX debugging information to the stdio stream STREAM
5350 which indicates that file NAME is the main source file--the file specified
5351 as the input file for compilation. This macro is called only once, at the
5352 beginning of compilation.
5354 This macro need not be defined if the standard form of output for DBX
5355 debugging information is appropriate.
5357 Defined in svr4.h. */
5358 /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */
5360 /* A C statement to output DBX debugging information to the stdio stream STREAM
5361 which indicates that the current directory during compilation is named NAME.
5363 This macro need not be defined if the standard form of output for DBX
5364 debugging information is appropriate. */
5365 /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */
5367 /* A C statement to output DBX debugging information at the end of compilation
5368 of the main source file NAME.
5370 If you don't define this macro, nothing special is output at the end of
5371 compilation, which is correct for most machines. */
5372 /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */
5374 /* A C statement to output DBX debugging information to the stdio stream STREAM
5375 which indicates that file NAME is the current source file. This output is
5376 generated each time input shifts to a different source file as a result of
5377 `#include', the end of an included file, or a `#line' command.
5379 This macro need not be defined if the standard form of output for DBX
5380 debugging information is appropriate. */
5381 /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
5384 /* Macros for SDB and Dwarf Output. */
5386 /* Define this macro if GNU CC should produce COFF-style debugging output for
5387 SDB in response to the `-g' option. */
5388 /* #define SDB_DEBUGGING_INFO */
5390 /* Define this macro if GNU CC should produce dwarf format debugging output in
5391 response to the `-g' option.
5393 Defined in svr4.h. */
5394 /* #define DWARF_DEBUGGING_INFO */
5396 /* Define this macro if GNU CC should produce dwarf version 2 format debugging
5397 output in response to the `-g' option.
5399 To support optional call frame debugging information, you must also define
5400 `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the
5401 prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa'
5402 and `dwarf2out_reg_save' as appropriate from `FUNCTION_PROLOGUE' if you
5405 Defined in svr4.h. */
5406 /* #define DWARF2_DEBUGGING_INFO */
5408 /* Define these macros to override the assembler syntax for the special SDB
5409 assembler directives. See `sdbout.c' for a list of these macros and their
5410 arguments. If the standard syntax is used, you need not define them
5412 /* #define PUT_SDB_... */
5414 /* Some assemblers do not support a semicolon as a delimiter, even between SDB
5415 assembler directives. In that case, define this macro to be the delimiter
5416 to use (usually `\n'). It is not necessary to define a new set of
5417 `PUT_SDB_OP' macros if this is the only change required. */
5418 /* #define SDB_DELIM */
5420 /* Define this macro to override the usual method of constructing a dummy name
5421 for anonymous structure and union types. See `sdbout.c' for more
5423 /* #define SDB_GENERATE_FAKE */
5425 /* Define this macro to allow references to unknown structure, union, or
5426 enumeration tags to be emitted. Standard COFF does not allow handling of
5427 unknown references, MIPS ECOFF has support for it. */
5428 /* #define SDB_ALLOW_UNKNOWN_REFERENCES */
5430 /* Define this macro to allow references to structure, union, or enumeration
5431 tags that have not yet been seen to be handled. Some assemblers choke if
5432 forward tags are used, while some require it. */
5433 /* #define SDB_ALLOW_FORWARD_REFERENCES */
5436 /* Cross Compilation and Floating Point. */
5438 /* While all modern machines use 2's complement representation for integers,
5439 there are a variety of representations for floating point numbers. This
5440 means that in a cross-compiler the representation of floating point numbers
5441 in the compiled program may be different from that used in the machine doing
5444 Because different representation systems may offer different amounts of
5445 range and precision, the cross compiler cannot safely use the host machine's
5446 floating point arithmetic. Therefore, floating point constants must be
5447 represented in the target machine's format. This means that the cross
5448 compiler cannot use `atof' to parse a floating point constant; it must have
5449 its own special routine to use instead. Also, constant folding must emulate
5450 the target machine's arithmetic (or must not be done at all).
5452 The macros in the following table should be defined only if you are cross
5453 compiling between different floating point formats.
5455 Otherwise, don't define them. Then default definitions will be set up which
5456 use `double' as the data type, `==' to test for equality, etc.
5458 You don't need to worry about how many times you use an operand of any of
5459 these macros. The compiler never uses operands which have side effects. */
5461 /* A macro for the C data type to be used to hold a floating point value in the
5462 target machine's format. Typically this would be a `struct' containing an
5464 /* #define REAL_VALUE_TYPE */
5466 /* A macro for a C expression which compares for equality the two values, X and
5467 Y, both of type `REAL_VALUE_TYPE'. */
5468 /* #define REAL_VALUES_EQUAL(X, Y) */
5470 /* A macro for a C expression which tests whether X is less than Y, both values
5471 being of type `REAL_VALUE_TYPE' and interpreted as floating point numbers in
5472 the target machine's representation. */
5473 /* #define REAL_VALUES_LESS(X, Y) */
5475 /* A macro for a C expression which performs the standard library function
5476 `ldexp', but using the target machine's floating point representation. Both
5477 X and the value of the expression have type `REAL_VALUE_TYPE'. The second
5478 argument, SCALE, is an integer. */
5479 /* #define REAL_VALUE_LDEXP(X, SCALE) */
5481 /* A macro whose definition is a C expression to convert the target-machine
5482 floating point value X to a signed integer. X has type `REAL_VALUE_TYPE'. */
5483 /* #define REAL_VALUE_FIX(X) */
5485 /* A macro whose definition is a C expression to convert the target-machine
5486 floating point value X to an unsigned integer. X has type
5487 `REAL_VALUE_TYPE'. */
5488 /* #define REAL_VALUE_UNSIGNED_FIX(X) */
5490 /* A macro whose definition is a C expression to round the target-machine
5491 floating point value X towards zero to an integer value (but still as a
5492 floating point number). X has type `REAL_VALUE_TYPE', and so does the
5494 /* #define REAL_VALUE_RNDZINT(X) */
5496 /* A macro whose definition is a C expression to round the target-machine
5497 floating point value X towards zero to an unsigned integer value (but still
5498 represented as a floating point number). X has type `REAL_VALUE_TYPE', and
5499 so does the value. */
5500 /* #define REAL_VALUE_UNSIGNED_RNDZINT(X) */
5502 /* A macro for a C expression which converts STRING, an expression of type
5503 `char *', into a floating point number in the target machine's
5504 representation for mode MODE. The value has type `REAL_VALUE_TYPE'. */
5505 /* #define REAL_VALUE_ATOF(STRING, MODE) */
5507 /* Define this macro if infinity is a possible floating point value, and
5508 therefore division by 0 is legitimate. */
5509 /* #define REAL_INFINITY */
5511 /* A macro for a C expression which determines whether X, a floating point
5512 value, is infinity. The value has type `int'. By default, this is defined
5514 /* #define REAL_VALUE_ISINF(X) */
5516 /* A macro for a C expression which determines whether X, a floating point
5517 value, is a "nan" (not-a-number). The value has type `int'. By default,
5518 this is defined to call `isnan'. */
5519 /* #define REAL_VALUE_ISNAN(X) */
5521 /* Define the following additional macros if you want to make floating point
5522 constant folding work while cross compiling. If you don't define them,
5523 cross compilation is still possible, but constant folding will not happen
5524 for floating point values. */
5526 /* A macro for a C statement which calculates an arithmetic operation of the
5527 two floating point values X and Y, both of type `REAL_VALUE_TYPE' in the
5528 target machine's representation, to produce a result of the same type and
5529 representation which is stored in OUTPUT (which will be a variable).
5531 The operation to be performed is specified by CODE, a tree code which will
5532 always be one of the following: `PLUS_EXPR', `MINUS_EXPR', `MULT_EXPR',
5533 `RDIV_EXPR', `MAX_EXPR', `MIN_EXPR'.
5535 The expansion of this macro is responsible for checking for overflow. If
5536 overflow happens, the macro expansion should execute the statement `return
5537 0;', which indicates the inability to perform the arithmetic operation
5539 /* #define REAL_ARITHMETIC(OUTPUT, CODE, X, Y) */
5541 /* The real.h file actually defines REAL_ARITHMETIC appropriately if it was
5542 defined at all before entering into the code, by using #undef first. */
5543 #define REAL_ARITHMETIC
5545 /* A macro for a C expression which returns the negative of the floating point
5546 value X. Both X and the value of the expression have type `REAL_VALUE_TYPE'
5547 and are in the target machine's floating point representation.
5549 There is no way for this macro to report overflow, since overflow can't
5550 happen in the negation operation. */
5551 /* #define REAL_VALUE_NEGATE(X) */
5553 /* A macro for a C expression which converts the floating point value X to mode
5556 Both X and the value of the expression are in the target machine's floating
5557 point representation and have type `REAL_VALUE_TYPE'. However, the value
5558 should have an appropriate bit pattern to be output properly as a floating
5559 constant whose precision accords with mode MODE.
5561 There is no way for this macro to report overflow. */
5562 /* #define REAL_VALUE_TRUNCATE(MODE, X) */
5564 /* A macro for a C expression which converts a floating point value X into a
5565 double-precision integer which is then stored into LOW and HIGH, two
5566 variables of type INT. */
5567 /* #define REAL_VALUE_TO_INT(LOW, HIGH, X) */
5569 /* A macro for a C expression which converts a double-precision integer found
5570 in LOW and HIGH, two variables of type INT, into a floating point value
5571 which is then stored into X. */
5572 /* #define REAL_VALUE_FROM_INT(X, LOW, HIGH) */
5575 /* Miscellaneous Parameters. */
5577 /* Define this if you have defined special-purpose predicates in the file
5578 `MACHINE.c'. This macro is called within an initializer of an array of
5579 structures. The first field in the structure is the name of a predicate and
5580 the second field is an array of rtl codes. For each predicate, list all rtl
5581 codes that can be in expressions matched by the predicate. The list should
5582 have a trailing comma. Here is an example of two entries in the list for a
5583 typical RISC machine:
5585 #define PREDICATE_CODES \
5586 {"gen_reg_rtx_operand", {SUBREG, REG}}, \
5587 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
5589 Defining this macro does not affect the generated code (however, incorrect
5590 definitions that omit an rtl code that may be matched by the predicate can
5591 cause the compiler to malfunction). Instead, it allows the table built by
5592 `genrecog' to be more compact and efficient, thus speeding up the compiler.
5593 The most important predicates to include in the list specified by this macro
5594 are thoses used in the most insn patterns. */
5596 #define PREDICATE_CODES \
5597 { "short_memory_operand", { MEM }}, \
5598 { "long_memory_operand", { MEM }}, \
5599 { "d30v_memory_operand", { MEM }}, \
5600 { "single_reg_memory_operand", { MEM }}, \
5601 { "const_addr_memory_operand", { MEM }}, \
5602 { "call_operand", { MEM }}, \
5603 { "gpr_operand", { REG, SUBREG }}, \
5604 { "accum_operand", { REG, SUBREG }}, \
5605 { "gpr_or_accum_operand", { REG, SUBREG }}, \
5606 { "cr_operand", { REG, SUBREG }}, \
5607 { "repeat_operand", { REG, SUBREG }}, \
5608 { "flag_operand", { REG, SUBREG }}, \
5609 { "br_flag_operand", { REG, SUBREG }}, \
5610 { "br_flag_or_constant_operand", { REG, SUBREG, CONST_INT }}, \
5611 { "gpr_or_br_flag_operand", { REG, SUBREG }}, \
5612 { "f0_operand", { REG, SUBREG }}, \
5613 { "f1_operand", { REG, SUBREG }}, \
5614 { "carry_operand", { REG, SUBREG }}, \
5615 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, \
5617 { "gpr_or_signed6_operand", { REG, SUBREG, CONST_INT }}, \
5618 { "gpr_or_unsigned5_operand", { REG, SUBREG, CONST_INT }}, \
5619 { "gpr_or_unsigned6_operand", { REG, SUBREG, CONST_INT }}, \
5620 { "gpr_or_constant_operand", { REG, SUBREG, CONST_INT, \
5621 CONST, SYMBOL_REF, \
5623 { "gpr_or_dbl_const_operand", { REG, SUBREG, CONST_INT, \
5624 CONST, SYMBOL_REF, \
5625 LABEL_REF, CONST_DOUBLE }}, \
5626 { "gpr_or_memory_operand", { REG, SUBREG, MEM }}, \
5627 { "move_input_operand", { REG, SUBREG, MEM, CONST_INT, \
5628 CONST, SYMBOL_REF, \
5629 LABEL_REF, CONST_DOUBLE }}, \
5630 { "move_output_operand", { REG, SUBREG, MEM }}, \
5631 { "signed6_operand", { CONST_INT }}, \
5632 { "unsigned5_operand", { CONST_INT }}, \
5633 { "unsigned6_operand", { CONST_INT }}, \
5634 { "bitset_operand", { CONST_INT }}, \
5635 { "condexec_test_operator", { EQ, NE }}, \
5636 { "condexec_branch_operator", { EQ, NE }}, \
5637 { "condexec_unary_operator", { ABS, NEG, NOT, ZERO_EXTEND }}, \
5638 { "condexec_addsub_operator", { PLUS, MINUS }}, \
5639 { "condexec_binary_operator", { MULT, AND, IOR, XOR, \
5640 ASHIFT, ASHIFTRT, LSHIFTRT, \
5641 ROTATE, ROTATERT }}, \
5642 { "condexec_shiftl_operator", { ASHIFT, ROTATE }}, \
5643 { "condexec_extend_operator", { SIGN_EXTEND, ZERO_EXTEND }}, \
5644 { "branch_zero_operator", { EQ, NE }}, \
5645 { "cond_move_dest_operand", { REG, SUBREG, MEM }}, \
5646 { "cond_move_operand", { REG, SUBREG, CONST_INT, \
5647 CONST, SYMBOL_REF, \
5648 LABEL_REF, MEM }}, \
5649 { "cond_exec_operand", { REG, SUBREG, CONST_INT, \
5650 CONST, SYMBOL_REF, \
5651 LABEL_REF, MEM }}, \
5652 { "srelational_si_operator", { EQ, NE, LT, LE, GT, GE }}, \
5653 { "urelational_si_operator", { LTU, LEU, GTU, GEU }}, \
5654 { "relational_di_operator", { EQ, NE, LT, LE, GT, GE, \
5655 LTU, LEU, GTU, GEU }},
5657 /* An alias for a machine mode name. This is the machine mode that elements of
5658 a jump-table should have. */
5659 #define CASE_VECTOR_MODE SImode
5661 /* Define as C expression which evaluates to nonzero if the tablejump
5662 instruction expects the table to contain offsets from the address of the
5664 Do not define this if the table should contain absolute addresses. */
5665 /* #define CASE_VECTOR_PC_RELATIVE 1 */
5667 /* Define this if control falls through a `case' insn when the index value is
5668 out of range. This means the specified default-label is actually ignored by
5669 the `case' insn proper. */
5670 /* #define CASE_DROPS_THROUGH */
5672 /* Define this to be the smallest number of different values for which it is
5673 best to use a jump-table instead of a tree of conditional branches. The
5674 default is four for machines with a `casesi' instruction and five otherwise.
5675 This is best for most machines. */
5676 /* #define CASE_VALUES_THRESHOLD */
5678 /* Define this macro if operations between registers with integral mode smaller
5679 than a word are always performed on the entire register. Most RISC machines
5680 have this property and most CISC machines do not. */
5681 #define WORD_REGISTER_OPERATIONS 1
5683 /* Define this macro to be a C expression indicating when insns that read
5684 memory in MODE, an integral mode narrower than a word, set the bits outside
5685 of MODE to be either the sign-extension or the zero-extension of the data
5686 read. Return `SIGN_EXTEND' for values of MODE for which the insn
5687 sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other
5690 This macro is not called with MODE non-integral or with a width greater than
5691 or equal to `BITS_PER_WORD', so you may return any value in this case. Do
5692 not define this macro if it would always return `NIL'. On machines where
5693 this macro is defined, you will normally define it as the constant
5694 `SIGN_EXTEND' or `ZERO_EXTEND'. */
5696 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
5698 /* Define if loading short immediate values into registers sign extends. */
5699 #define SHORT_IMMEDIATES_SIGN_EXTEND
5701 /* An alias for a tree code that should be used by default for conversion of
5702 floating point values to fixed point. Normally, `FIX_ROUND_EXPR' is used. */
5703 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
5705 /* Define this macro if the same instructions that convert a floating point
5706 number to a signed fixed point number also convert validly to an unsigned
5708 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
5710 /* An alias for a tree code that is the easiest kind of division to compile
5711 code for in the general case. It may be `TRUNC_DIV_EXPR', `FLOOR_DIV_EXPR',
5712 `CEIL_DIV_EXPR' or `ROUND_DIV_EXPR'. These four division operators differ
5713 in how they round the result to an integer. `EASY_DIV_EXPR' is used when it
5714 is permissible to use any of those kinds of division and the choice should
5715 be made on the basis of efficiency. */
5716 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
5718 /* The maximum number of bytes that a single instruction can move quickly from
5719 memory to memory. */
5722 /* The maximum number of bytes that a single instruction can move quickly from
5723 memory to memory. If this is undefined, the default is `MOVE_MAX'.
5724 Otherwise, it is the constant value that is the largest value that
5725 `MOVE_MAX' can have at run-time. */
5726 /* #define MAX_MOVE_MAX */
5728 /* A C expression that is nonzero if on this machine the number of bits
5729 actually used for the count of a shift operation is equal to the number of
5730 bits needed to represent the size of the object being shifted. When this
5731 macro is non-zero, the compiler will assume that it is safe to omit a
5732 sign-extend, zero-extend, and certain bitwise `and' instructions that
5733 truncates the count of a shift operation. On machines that have
5734 instructions that act on bitfields at variable positions, which may include
5735 `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables
5736 deletion of truncations of the values that serve as arguments to bitfield
5739 If both types of instructions truncate the count (for shifts) and position
5740 (for bitfield operations), or if no variable-position bitfield instructions
5741 exist, you should define this macro.
5743 However, on some machines, such as the 80386 and the 680x0, truncation only
5744 applies to shift operations and not the (real or pretended) bitfield
5745 operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines.
5746 Instead, add patterns to the `md' file that include the implied truncation
5747 of the shift instructions.
5749 You need not define this macro if it would always have the value of zero. */
5750 /* #define SHIFT_COUNT_TRUNCATED */
5752 /* A C expression which is nonzero if on this machine it is safe to "convert"
5753 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
5754 than INPREC) by merely operating on it as if it had only OUTPREC bits.
5756 On many machines, this expression can be 1.
5758 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
5759 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
5760 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
5762 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
5764 /* A C expression describing the value returned by a comparison operator with
5765 an integral mode and stored by a store-flag instruction (`sCOND') when the
5766 condition is true. This description must apply to *all* the `sCOND'
5767 patterns and all the comparison operators whose results have a `MODE_INT'
5770 A value of 1 or -1 means that the instruction implementing the comparison
5771 operator returns exactly 1 or -1 when the comparison is true and 0 when the
5772 comparison is false. Otherwise, the value indicates which bits of the
5773 result are guaranteed to be 1 when the comparison is true. This value is
5774 interpreted in the mode of the comparison operation, which is given by the
5775 mode of the first operand in the `sCOND' pattern. Either the low bit or the
5776 sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used
5779 If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code
5780 that depends only on the specified bits. It can also replace comparison
5781 operators with equivalent operations if they cause the required bits to be
5782 set, even if the remaining bits are undefined. For example, on a machine
5783 whose comparison operators return an `SImode' value and where
5784 `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit
5785 is relevant, the expression
5787 (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0))
5791 (ashift:SI X (const_int N))
5793 where N is the appropriate shift count to move the bit being tested into the
5796 There is no way to describe a machine that always sets the low-order bit for
5797 a true value, but does not guarantee the value of any other bits, but we do
5798 not know of any machine that has such an instruction. If you are trying to
5799 port GNU CC to such a machine, include an instruction to perform a
5800 logical-and of the result with 1 in the pattern for the comparison operators
5801 and let us know (*note How to Report Bugs: Bug Reporting.).
5803 Often, a machine will have multiple instructions that obtain a value from a
5804 comparison (or the condition codes). Here are rules to guide the choice of
5805 value for `STORE_FLAG_VALUE', and hence the instructions to be used:
5807 * Use the shortest sequence that yields a valid definition for
5808 `STORE_FLAG_VALUE'. It is more efficient for the compiler to
5809 "normalize" the value (convert it to, e.g., 1 or 0) than for
5810 the comparison operators to do so because there may be
5811 opportunities to combine the normalization with other
5814 * For equal-length sequences, use a value of 1 or -1, with -1
5815 being slightly preferred on machines with expensive jumps and
5816 1 preferred on other machines.
5818 * As a second choice, choose a value of `0x80000001' if
5819 instructions exist that set both the sign and low-order bits
5820 but do not define the others.
5822 * Otherwise, use a value of `0x80000000'.
5824 Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and
5825 its negation in the same number of instructions. On those machines, you
5826 should also define a pattern for those cases, e.g., one matching
5828 (set A (neg:M (ne:M B C)))
5830 Some machines can also perform `and' or `plus' operations on condition code
5831 values with less instructions than the corresponding `sCOND' insn followed
5832 by `and' or `plus'. On those machines, define the appropriate patterns.
5833 Use the names `incscc' and `decscc', respectively, for the the patterns
5834 which perform `plus' or `minus' operations on condition code values. See
5835 `rs6000.md' for some examples. The GNU Superoptizer can be used to find
5836 such instruction sequences on other machines.
5838 You need not define `STORE_FLAG_VALUE' if the machine has no store-flag
5840 /* #define STORE_FLAG_VALUE */
5842 /* A C expression that gives a non-zero floating point value that is returned
5843 when comparison operators with floating-point results are true. Define this
5844 macro on machine that have comparison operations that return floating-point
5845 values. If there are no such operations, do not define this macro. */
5846 /* #define FLOAT_STORE_FLAG_VALUE */
5848 /* An alias for the machine mode for pointers. On most machines, define this
5849 to be the integer mode corresponding to the width of a hardware pointer;
5850 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
5851 you must define this to be one of the partial integer modes, such as
5854 The width of `Pmode' must be at least as large as the value of
5855 `POINTER_SIZE'. If it is not equal, you must define the macro
5856 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
5857 #define Pmode SImode
5859 /* An alias for the machine mode used for memory references to functions being
5860 called, in `call' RTL expressions. On most machines this should be
5862 #define FUNCTION_MODE QImode
5864 /* A C expression for the maximum number of instructions above which the
5865 function DECL should not be inlined. DECL is a `FUNCTION_DECL' node.
5867 The default definition of this macro is 64 plus 8 times the number of
5868 arguments that the function accepts. Some people think a larger threshold
5869 should be used on RISC machines. */
5870 /* #define INTEGRATE_THRESHOLD(DECL) */
5872 /* Define this if the preprocessor should ignore `#sccs' directives and print
5875 Defined in svr4.h. */
5876 /* #define SCCS_DIRECTIVE */
5878 /* Define this macro if the system header files support C++ as well as C. This
5879 macro inhibits the usual method of using system header files in C++, which
5880 is to pretend that the file's contents are enclosed in `extern "C" {...}'. */
5881 /* #define NO_IMPLICIT_EXTERN_C */
5883 /* Define this macro to handle System V style pragmas (particularly #pack).
5885 Defined in svr4.h. */
5886 #define HANDLE_SYSV_PRAGMA
5888 /* Define this macro if you want to handle #pragma weak (HANDLE_SYSV_PRAGMA
5889 must also be defined). */
5890 /* #define HANDLE_WEAK_PRAGMA */
5892 /* If defined, a C expression whose value is zero if the attributes on TYPE1
5893 and TYPE2 are incompatible, one if they are compatible, and two if they are
5894 nearly compatible (which causes a warning to be generated). */
5895 /* #define COMP_TYPE_ATTRIBUTES(TYPE1, TYPE2) */
5897 /* If defined, a C statement that assigns default attributes to newly defined
5899 /* #define SET_DEFAULT_TYPE_ATTRIBUTES(TYPE) */
5901 /* Define this macro to control use of the character `$' in identifier names.
5902 The value should be 0, 1, or 2. 0 means `$' is not allowed by default; 1
5903 means it is allowed by default if `-traditional' is used; 2 means it is
5904 allowed by default provided `-ansi' is not used. 1 is the default; there is
5905 no need to define this macro in that case. */
5906 /* #define DOLLARS_IN_IDENTIFIERS */
5908 /* Define this macro if the assembler does not accept the character `$' in
5909 label names. By default constructors and destructors in G++ have `$' in the
5910 identifiers. If this macro is defined, `.' is used instead.
5912 Defined in svr4.h. */
5913 /* #define NO_DOLLAR_IN_LABEL */
5915 /* Define this macro if the assembler does not accept the character `.' in
5916 label names. By default constructors and destructors in G++ have names that
5917 use `.'. If this macro is defined, these names are rewritten to avoid `.'. */
5918 /* #define NO_DOT_IN_LABEL */
5920 /* Define this macro if the target system expects every program's `main'
5921 function to return a standard "success" value by default (if no other value
5922 is explicitly returned).
5924 The definition should be a C statement (sans semicolon) to generate the
5925 appropriate rtl instructions. It is used only when compiling the end of
5927 /* #define DEFAULT_MAIN_RETURN */
5929 /* Define this if your `exit' function needs to do something besides calling an
5930 external function `_cleanup' before terminating with `_exit'. The
5931 `EXIT_BODY' macro is only needed if `NEED_ATEXIT' is defined and
5932 `ON_EXIT' is not defined. */
5933 /* #define EXIT_BODY */
5935 /* Define this macro as a C expression that is nonzero if it is safe for the
5936 delay slot scheduler to place instructions in the delay slot of INSN, even
5937 if they appear to use a resource set or clobbered in INSN. INSN is always a
5938 `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this
5939 behavior. On machines where some `insn' or `jump_insn' is really a function
5940 call and hence has this behavior, you should define this macro.
5942 You need not define this macro if it would always return zero. */
5943 /* #define INSN_SETS_ARE_DELAYED(INSN) */
5945 /* Define this macro as a C expression that is nonzero if it is safe for the
5946 delay slot scheduler to place instructions in the delay slot of INSN, even
5947 if they appear to set or clobber a resource referenced in INSN. INSN is
5948 always a `jump_insn' or an `insn'. On machines where some `insn' or
5949 `jump_insn' is really a function call and its operands are registers whose
5950 use is actually in the subroutine it calls, you should define this macro.
5951 Doing so allows the delay slot scheduler to move instructions which copy
5952 arguments into the argument registers into the delay slot of INSN.
5954 You need not define this macro if it would always return zero. */
5955 /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */
5957 /* In rare cases, correct code generation requires extra machine dependent
5958 processing between the second jump optimization pass and delayed branch
5959 scheduling. On those machines, define this macro as a C statement to act on
5960 the code starting at INSN. */
5961 #define MACHINE_DEPENDENT_REORG(INSN) d30v_machine_dependent_reorg (INSN)
5963 /* Define this macro if in some cases global symbols from one translation unit
5964 may not be bound to undefined symbols in another translation unit without
5965 user intervention. For instance, under Microsoft Windows symbols must be
5966 explicitly imported from shared libraries (DLLs). */
5967 /* #define MULTIPLE_SYMBOL_SPACES */
5969 /* A C expression for the maximum number of instructions to execute via
5970 conditional execution instructions instead of a branch. A value of
5971 BRANCH_COST+1 is the default if the machine does not use cc0, and 1 if it
5973 #define MAX_CONDITIONAL_EXECUTE d30v_cond_exec
5975 #define D30V_DEFAULT_MAX_CONDITIONAL_EXECUTE 4
5977 /* Values of the -mcond-exec=n string. */
5978 extern int d30v_cond_exec;
5979 extern const char *d30v_cond_exec_string;
5981 /* Indicate how many instructions can be issued at the same time. */
5982 #define ISSUE_RATE 2
5984 #endif /* GCC_D30V_H */
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