1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@monkeys.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 #ifndef GCC_DEFAULTS_H
24 #define GCC_DEFAULTS_H
26 #ifndef GET_ENVIRONMENT
27 #define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
30 #define obstack_chunk_alloc ((void *(*) (long)) xmalloc)
31 #define obstack_chunk_free ((void (*) (void *)) free)
32 #define OBSTACK_CHUNK_SIZE 0
33 #define gcc_obstack_init(OBSTACK) \
34 _obstack_begin ((OBSTACK), OBSTACK_CHUNK_SIZE, 0, \
35 obstack_chunk_alloc, \
38 /* Define default standard character escape sequences. */
40 # define TARGET_BELL 007
41 # define TARGET_BS 010
42 # define TARGET_TAB 011
43 # define TARGET_NEWLINE 012
44 # define TARGET_VT 013
45 # define TARGET_FF 014
46 # define TARGET_CR 015
47 # define TARGET_ESC 033
50 /* Store in OUTPUT a string (made with alloca) containing an
51 assembler-name for a local static variable or function named NAME.
52 LABELNO is an integer which is different for each call. */
55 # ifndef NO_DOT_IN_LABEL
56 # define ASM_PN_FORMAT "%s.%lu"
58 # ifndef NO_DOLLAR_IN_LABEL
59 # define ASM_PN_FORMAT "%s$%lu"
61 # define ASM_PN_FORMAT "__%s_%lu"
64 #endif /* ! ASM_PN_FORMAT */
66 #ifndef ASM_FORMAT_PRIVATE_NAME
67 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
68 do { const char *const name_ = (NAME); \
69 char *const output_ = (OUTPUT) = alloca (strlen (name_) + 32);\
70 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
75 #define ASM_STABD_OP "\t.stabd\t"
78 /* This is how to output an element of a case-vector that is absolute.
79 Some targets don't use this, but we have to define it anyway. */
81 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
82 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
83 do { fputs (integer_asm_op (POINTER_SIZE / UNITS_PER_WORD, TRUE), FILE); \
84 (*targetm.asm_out.internal_label) (FILE, "L", (VALUE)); \
89 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */
91 #ifndef ASM_OUTPUT_ASCII
92 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
94 FILE *_hide_asm_out_file = (MYFILE); \
95 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
96 int _hide_thissize = (MYLENGTH); \
98 FILE *asm_out_file = _hide_asm_out_file; \
99 const unsigned char *p = _hide_p; \
100 int thissize = _hide_thissize; \
102 fprintf (asm_out_file, "\t.ascii \""); \
104 for (i = 0; i < thissize; i++) \
107 if (c == '\"' || c == '\\') \
108 putc ('\\', asm_out_file); \
110 putc (c, asm_out_file); \
113 fprintf (asm_out_file, "\\%o", c); \
114 /* After an octal-escape, if a digit follows, \
115 terminate one string constant and start another. \
116 The VAX assembler fails to stop reading the escape \
117 after three digits, so this is the only way we \
118 can get it to parse the data properly. */ \
119 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
120 fprintf (asm_out_file, "\"\n\t.ascii \""); \
123 fprintf (asm_out_file, "\"\n"); \
129 /* This is how we tell the assembler to equate two values. */
131 #ifndef ASM_OUTPUT_DEF
132 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
133 do { fprintf ((FILE), "%s", SET_ASM_OP); \
134 assemble_name (FILE, LABEL1); \
135 fprintf (FILE, ","); \
136 assemble_name (FILE, LABEL2); \
137 fprintf (FILE, "\n"); \
142 /* This is how to output the definition of a user-level label named
143 NAME, such as the label on a static function or variable NAME. */
145 #ifndef ASM_OUTPUT_LABEL
146 #define ASM_OUTPUT_LABEL(FILE,NAME) \
147 do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
150 /* This is how to output a reference to a user-level label named NAME. */
152 #ifndef ASM_OUTPUT_LABELREF
153 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
156 /* Allow target to print debug info labels specially. This is useful for
157 VLIW targets, since debug info labels should go into the middle of
158 instruction bundles instead of breaking them. */
160 #ifndef ASM_OUTPUT_DEBUG_LABEL
161 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
162 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
165 /* This is how we tell the assembler that a symbol is weak. */
166 #ifndef ASM_OUTPUT_WEAK_ALIAS
167 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
168 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
171 ASM_WEAKEN_LABEL (STREAM, NAME); \
173 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
179 /* How to emit a .type directive. */
180 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
181 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
182 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
185 fputs (TYPE_ASM_OP, STREAM); \
186 assemble_name (STREAM, NAME); \
187 fputs (", ", STREAM); \
188 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
189 putc ('\n', STREAM); \
195 /* How to emit a .size directive. */
196 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
198 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
201 HOST_WIDE_INT size_ = (SIZE); \
202 fputs (SIZE_ASM_OP, STREAM); \
203 assemble_name (STREAM, NAME); \
204 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
208 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
211 fputs (SIZE_ASM_OP, STREAM); \
212 assemble_name (STREAM, NAME); \
213 fputs (", .-", STREAM); \
214 assemble_name (STREAM, NAME); \
215 putc ('\n', STREAM); \
222 /* This determines whether or not we support weak symbols. */
223 #ifndef SUPPORTS_WEAK
224 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
225 #define SUPPORTS_WEAK 1
227 #define SUPPORTS_WEAK 0
231 /* This determines whether or not we support link-once semantics. */
232 #ifndef SUPPORTS_ONE_ONLY
233 #ifdef MAKE_DECL_ONE_ONLY
234 #define SUPPORTS_ONE_ONLY 1
236 #define SUPPORTS_ONE_ONLY 0
240 /* By default, there is no prefix on user-defined symbols. */
241 #ifndef USER_LABEL_PREFIX
242 #define USER_LABEL_PREFIX ""
245 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
246 provide a weak attribute. Else define it to nothing.
248 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
249 not available at that time.
251 Note, this is only for use by target files which we know are to be
253 #ifndef TARGET_ATTRIBUTE_WEAK
255 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
257 # define TARGET_ATTRIBUTE_WEAK
261 /* If the target supports init_priority C++ attribute, give
262 SUPPORTS_INIT_PRIORITY a nonzero value. */
263 #ifndef SUPPORTS_INIT_PRIORITY
264 #define SUPPORTS_INIT_PRIORITY 1
265 #endif /* SUPPORTS_INIT_PRIORITY */
267 /* If duplicate library search directories can be removed from a
268 linker command without changing the linker's semantics, give this
270 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
271 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
272 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
274 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
275 the rest of the DWARF 2 frame unwind support is also provided. */
276 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
277 #define DWARF2_UNWIND_INFO 1
280 /* If we have named sections, and we're using crtstuff to run ctors,
281 use them for registering eh frame information. */
282 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
283 && !defined(EH_FRAME_IN_DATA_SECTION)
284 #ifndef EH_FRAME_SECTION_NAME
285 #define EH_FRAME_SECTION_NAME ".eh_frame"
289 /* If we have named section and we support weak symbols, then use the
290 .jcr section for recording java classes which need to be registered
291 at program start-up time. */
292 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
293 #ifndef JCR_SECTION_NAME
294 #define JCR_SECTION_NAME ".jcr"
298 /* By default, we generate a label at the beginning and end of the
299 text section, and compute the size of the text section by
300 subtracting the two. However, on some platforms that doesn't
301 work, and we use the section itself, rather than a label at the
302 beginning of it, to indicate the start of the section. On such
303 platforms, define this to zero. */
304 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
305 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
308 /* Supply a default definition for PROMOTE_PROTOTYPES. */
309 #ifndef PROMOTE_PROTOTYPES
310 #define PROMOTE_PROTOTYPES 0
313 /* Number of hardware registers that go into the DWARF-2 unwind info.
314 If not defined, equals FIRST_PSEUDO_REGISTER */
316 #ifndef DWARF_FRAME_REGISTERS
317 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
320 /* How to renumber registers for dbx and gdb. If not defined, assume
321 no renumbering is necessary. */
323 #ifndef DBX_REGISTER_NUMBER
324 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
327 /* Default sizes for base C types. If the sizes are different for
328 your target, you should override these values by defining the
329 appropriate symbols in your tm.h file. */
331 #ifndef BITS_PER_UNIT
332 #define BITS_PER_UNIT 8
335 #ifndef BITS_PER_WORD
336 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
339 #ifndef CHAR_TYPE_SIZE
340 #define CHAR_TYPE_SIZE BITS_PER_UNIT
343 #ifndef BOOL_TYPE_SIZE
344 /* `bool' has size and alignment `1', on almost all platforms. */
345 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
348 #ifndef SHORT_TYPE_SIZE
349 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
352 #ifndef INT_TYPE_SIZE
353 #define INT_TYPE_SIZE BITS_PER_WORD
356 #ifndef LONG_TYPE_SIZE
357 #define LONG_TYPE_SIZE BITS_PER_WORD
360 #ifndef LONG_LONG_TYPE_SIZE
361 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
364 #ifndef WCHAR_TYPE_SIZE
365 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
368 #ifndef FLOAT_TYPE_SIZE
369 #define FLOAT_TYPE_SIZE BITS_PER_WORD
372 #ifndef DOUBLE_TYPE_SIZE
373 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
376 #ifndef LONG_DOUBLE_TYPE_SIZE
377 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
380 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
382 #define POINTER_SIZE BITS_PER_WORD
385 #ifndef PIC_OFFSET_TABLE_REGNUM
386 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
389 /* By default, the preprocessor should be invoked the same way in C++
391 #ifndef CPLUSPLUS_CPP_SPEC
393 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
397 #ifndef ACCUMULATE_OUTGOING_ARGS
398 #define ACCUMULATE_OUTGOING_ARGS 0
401 /* Supply a default definition for PUSH_ARGS. */
404 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
410 /* Decide whether a function's arguments should be processed
411 from first to last or from last to first.
413 They should if the stack and args grow in opposite directions, but
414 only if we have push insns. */
418 #ifndef PUSH_ARGS_REVERSED
419 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
420 #define PUSH_ARGS_REVERSED PUSH_ARGS
426 #ifndef PUSH_ARGS_REVERSED
427 #define PUSH_ARGS_REVERSED 0
430 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
431 STACK_BOUNDARY is required. */
432 #ifndef PREFERRED_STACK_BOUNDARY
433 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
436 /* By default, the C++ compiler will use function addresses in the
437 vtable entries. Setting this nonzero tells the compiler to use
438 function descriptors instead. The value of this macro says how
439 many words wide the descriptor is (normally 2). It is assumed
440 that the address of a function descriptor may be treated as a
441 pointer to a function. */
442 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
443 #define TARGET_VTABLE_USES_DESCRIPTORS 0
446 /* By default, the vtable entries are void pointers, the so the alignment
447 is the same as pointer alignment. The value of this macro specifies
448 the alignment of the vtable entry in bits. It should be defined only
449 when special alignment is necessary. */
450 #ifndef TARGET_VTABLE_ENTRY_ALIGN
451 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
454 /* There are a few non-descriptor entries in the vtable at offsets below
455 zero. If these entries must be padded (say, to preserve the alignment
456 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
457 words in each data entry. */
458 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
459 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
462 /* Select a format to encode pointers in exception handling data. We
463 prefer those that result in fewer dynamic relocations. Assume no
464 special support here and encode direct references. */
465 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
466 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
469 /* By default, the C++ compiler will use the lowest bit of the pointer
470 to function to indicate a pointer-to-member-function points to a
471 virtual member function. However, if FUNCTION_BOUNDARY indicates
472 function addresses aren't always even, the lowest bit of the delta
473 field will be used. */
474 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
475 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
476 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
477 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
480 #ifndef DEFAULT_GDB_EXTENSIONS
481 #define DEFAULT_GDB_EXTENSIONS 1
484 /* If more than one debugging type is supported, you must define
485 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
487 This is one long line cause VAXC can't handle a \-newline. */
488 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) + defined (VMS_DEBUGGING_INFO))
489 #ifndef PREFERRED_DEBUGGING_TYPE
490 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
491 #endif /* no PREFERRED_DEBUGGING_TYPE */
492 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
493 so other code needn't care. */
494 #ifdef DBX_DEBUGGING_INFO
495 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
497 #ifdef SDB_DEBUGGING_INFO
498 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
500 #ifdef DWARF_DEBUGGING_INFO
501 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
503 #ifdef DWARF2_DEBUGGING_INFO
504 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
506 #ifdef VMS_DEBUGGING_INFO
507 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
509 #ifdef XCOFF_DEBUGGING_INFO
510 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
512 #endif /* More than one debugger format enabled. */
514 /* If still not defined, must have been because no debugging formats
516 #ifndef PREFERRED_DEBUGGING_TYPE
517 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
520 /* Define codes for all the float formats that we know of. */
521 #define UNKNOWN_FLOAT_FORMAT 0
522 #define IEEE_FLOAT_FORMAT 1
523 #define VAX_FLOAT_FORMAT 2
524 #define IBM_FLOAT_FORMAT 3
525 #define C4X_FLOAT_FORMAT 4
527 /* Default to IEEE float if not specified. Nearly all machines use it. */
528 #ifndef TARGET_FLOAT_FORMAT
529 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
532 /* Determine the register class for registers suitable to be the base
533 address register in a MEM. Allow the choice to be dependent upon
534 the mode of the memory access. */
535 #ifndef MODE_BASE_REG_CLASS
536 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
539 #ifndef LARGEST_EXPONENT_IS_NORMAL
540 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
543 #ifndef ROUND_TOWARDS_ZERO
544 #define ROUND_TOWARDS_ZERO 0
547 #ifndef MODE_HAS_NANS
548 #define MODE_HAS_NANS(MODE) \
549 (FLOAT_MODE_P (MODE) \
550 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
551 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
554 #ifndef MODE_HAS_INFINITIES
555 #define MODE_HAS_INFINITIES(MODE) \
556 (FLOAT_MODE_P (MODE) \
557 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
558 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
561 #ifndef MODE_HAS_SIGNED_ZEROS
562 #define MODE_HAS_SIGNED_ZEROS(MODE) \
563 (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
566 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
567 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
568 (FLOAT_MODE_P (MODE) \
569 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
570 && !ROUND_TOWARDS_ZERO)
573 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
574 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
577 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
578 then the word-endianness is the same as for integers. */
579 #ifndef FLOAT_WORDS_BIG_ENDIAN
580 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
583 #ifndef TARGET_FLT_EVAL_METHOD
584 #define TARGET_FLT_EVAL_METHOD 0
587 #ifndef HOT_TEXT_SECTION_NAME
588 #define HOT_TEXT_SECTION_NAME "text.hot"
591 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
592 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME "text.unlikely"
595 #ifndef VECTOR_MODE_SUPPORTED_P
596 #define VECTOR_MODE_SUPPORTED_P(MODE) 0
599 /* Determine whether __cxa_atexit, rather than atexit, is used to
600 register C++ destructors for local statics and global objects. */
601 #ifndef DEFAULT_USE_CXA_ATEXIT
602 #define DEFAULT_USE_CXA_ATEXIT 0
605 /* Determine whether extra constraint letter should be handled
606 via address reload (like 'o'). */
607 #ifndef EXTRA_MEMORY_CONSTRAINT
608 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
611 /* Determine whether extra constraint letter should be handled
612 as an address (like 'p'). */
613 #ifndef EXTRA_ADDRESS_CONSTRAINT
614 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
617 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
618 for all the characters that it does not want to change, so things like the
619 'length' of a digit in a matching constraint is an implementation detail,
620 and not part of the interface. */
621 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
623 #ifndef CONSTRAINT_LEN
624 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
627 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
628 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
631 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
632 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
633 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
636 #ifndef REG_CLASS_FROM_CONSTRAINT
637 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
640 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
641 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
644 #ifndef REGISTER_MOVE_COST
645 #define REGISTER_MOVE_COST(m, x, y) 2
648 /* Determine whether the the entire c99 runtime
649 is present in the runtime library. */
650 #ifndef TARGET_C99_FUNCTIONS
651 #define TARGET_C99_FUNCTIONS 0
654 /* Indicate that CLZ and CTZ are undefined at zero. */
655 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
656 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
658 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
659 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
662 /* Provide a default value for STORE_FLAG_VALUE. */
663 #ifndef STORE_FLAG_VALUE
664 #define STORE_FLAG_VALUE 1
667 /* This macro is used to determine what the largest unit size that
668 move_by_pieces can use is. */
670 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
671 move efficiently, as opposed to MOVE_MAX which is the maximum
672 number of bytes we can move with a single instruction. */
674 #ifndef MOVE_MAX_PIECES
675 #define MOVE_MAX_PIECES MOVE_MAX
678 #ifndef STACK_POINTER_OFFSET
679 #define STACK_POINTER_OFFSET 0
683 #define LOCAL_REGNO(REGNO) 0
686 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
687 the stack pointer does not matter. The value is tested only in
688 functions that have frame pointers. */
689 #ifndef EXIT_IGNORE_STACK
690 #define EXIT_IGNORE_STACK 0
693 #endif /* ! GCC_DEFAULTS_H */