1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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 / BITS_PER_UNIT, 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 /* Number of hardware registers that go into the DWARF-2 unwind info.
309 If not defined, equals FIRST_PSEUDO_REGISTER */
311 #ifndef DWARF_FRAME_REGISTERS
312 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
315 /* How to renumber registers for dbx and gdb. If not defined, assume
316 no renumbering is necessary. */
318 #ifndef DBX_REGISTER_NUMBER
319 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
322 /* Default sizes for base C types. If the sizes are different for
323 your target, you should override these values by defining the
324 appropriate symbols in your tm.h file. */
326 #ifndef BITS_PER_UNIT
327 #define BITS_PER_UNIT 8
330 #ifndef BITS_PER_WORD
331 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
334 #ifndef CHAR_TYPE_SIZE
335 #define CHAR_TYPE_SIZE BITS_PER_UNIT
338 #ifndef BOOL_TYPE_SIZE
339 /* `bool' has size and alignment `1', on almost all platforms. */
340 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
343 #ifndef SHORT_TYPE_SIZE
344 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
347 #ifndef INT_TYPE_SIZE
348 #define INT_TYPE_SIZE BITS_PER_WORD
351 #ifndef LONG_TYPE_SIZE
352 #define LONG_TYPE_SIZE BITS_PER_WORD
355 #ifndef LONG_LONG_TYPE_SIZE
356 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
359 #ifndef WCHAR_TYPE_SIZE
360 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
363 #ifndef FLOAT_TYPE_SIZE
364 #define FLOAT_TYPE_SIZE BITS_PER_WORD
367 #ifndef DOUBLE_TYPE_SIZE
368 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
371 #ifndef LONG_DOUBLE_TYPE_SIZE
372 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
375 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
377 #define POINTER_SIZE BITS_PER_WORD
380 #ifndef PIC_OFFSET_TABLE_REGNUM
381 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
384 /* By default, the preprocessor should be invoked the same way in C++
386 #ifndef CPLUSPLUS_CPP_SPEC
388 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
392 #ifndef ACCUMULATE_OUTGOING_ARGS
393 #define ACCUMULATE_OUTGOING_ARGS 0
396 /* Supply a default definition for PUSH_ARGS. */
399 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
405 /* Decide whether a function's arguments should be processed
406 from first to last or from last to first.
408 They should if the stack and args grow in opposite directions, but
409 only if we have push insns. */
413 #ifndef PUSH_ARGS_REVERSED
414 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
415 #define PUSH_ARGS_REVERSED PUSH_ARGS
421 #ifndef PUSH_ARGS_REVERSED
422 #define PUSH_ARGS_REVERSED 0
425 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
426 STACK_BOUNDARY is required. */
427 #ifndef PREFERRED_STACK_BOUNDARY
428 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
431 /* By default, the C++ compiler will use function addresses in the
432 vtable entries. Setting this nonzero tells the compiler to use
433 function descriptors instead. The value of this macro says how
434 many words wide the descriptor is (normally 2). It is assumed
435 that the address of a function descriptor may be treated as a
436 pointer to a function. */
437 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
438 #define TARGET_VTABLE_USES_DESCRIPTORS 0
441 /* By default, the vtable entries are void pointers, the so the alignment
442 is the same as pointer alignment. The value of this macro specifies
443 the alignment of the vtable entry in bits. It should be defined only
444 when special alignment is necessary. */
445 #ifndef TARGET_VTABLE_ENTRY_ALIGN
446 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
449 /* There are a few non-descriptor entries in the vtable at offsets below
450 zero. If these entries must be padded (say, to preserve the alignment
451 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
452 words in each data entry. */
453 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
454 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
457 /* Select a format to encode pointers in exception handling data. We
458 prefer those that result in fewer dynamic relocations. Assume no
459 special support here and encode direct references. */
460 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
461 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
464 /* By default, the C++ compiler will use the lowest bit of the pointer
465 to function to indicate a pointer-to-member-function points to a
466 virtual member function. However, if FUNCTION_BOUNDARY indicates
467 function addresses aren't always even, the lowest bit of the delta
468 field will be used. */
469 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
470 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
471 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
472 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
475 #ifndef DEFAULT_GDB_EXTENSIONS
476 #define DEFAULT_GDB_EXTENSIONS 1
479 /* If more than one debugging type is supported, you must define
480 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
482 This is one long line cause VAXC can't handle a \-newline. */
483 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) + defined (VMS_DEBUGGING_INFO))
484 #ifndef PREFERRED_DEBUGGING_TYPE
485 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
486 #endif /* no PREFERRED_DEBUGGING_TYPE */
487 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
488 so other code needn't care. */
489 #ifdef DBX_DEBUGGING_INFO
490 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
492 #ifdef SDB_DEBUGGING_INFO
493 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
495 #ifdef DWARF_DEBUGGING_INFO
496 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
498 #ifdef DWARF2_DEBUGGING_INFO
499 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
501 #ifdef VMS_DEBUGGING_INFO
502 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
504 #ifdef XCOFF_DEBUGGING_INFO
505 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
507 #endif /* More than one debugger format enabled. */
509 /* If still not defined, must have been because no debugging formats
511 #ifndef PREFERRED_DEBUGGING_TYPE
512 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
515 /* Define codes for all the float formats that we know of. */
516 #define UNKNOWN_FLOAT_FORMAT 0
517 #define IEEE_FLOAT_FORMAT 1
518 #define VAX_FLOAT_FORMAT 2
519 #define IBM_FLOAT_FORMAT 3
520 #define C4X_FLOAT_FORMAT 4
522 /* Default to IEEE float if not specified. Nearly all machines use it. */
523 #ifndef TARGET_FLOAT_FORMAT
524 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
527 /* Determine the register class for registers suitable to be the base
528 address register in a MEM. Allow the choice to be dependent upon
529 the mode of the memory access. */
530 #ifndef MODE_BASE_REG_CLASS
531 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
534 #ifndef LARGEST_EXPONENT_IS_NORMAL
535 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
538 #ifndef ROUND_TOWARDS_ZERO
539 #define ROUND_TOWARDS_ZERO 0
542 #ifndef MODE_HAS_NANS
543 #define MODE_HAS_NANS(MODE) \
544 (FLOAT_MODE_P (MODE) \
545 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
546 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
549 #ifndef MODE_HAS_INFINITIES
550 #define MODE_HAS_INFINITIES(MODE) \
551 (FLOAT_MODE_P (MODE) \
552 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
553 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
556 #ifndef MODE_HAS_SIGNED_ZEROS
557 #define MODE_HAS_SIGNED_ZEROS(MODE) \
558 (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
561 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
562 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
563 (FLOAT_MODE_P (MODE) \
564 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
565 && !ROUND_TOWARDS_ZERO)
568 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
569 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
572 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
573 then the word-endianness is the same as for integers. */
574 #ifndef FLOAT_WORDS_BIG_ENDIAN
575 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
578 #ifndef TARGET_FLT_EVAL_METHOD
579 #define TARGET_FLT_EVAL_METHOD 0
582 #ifndef HOT_TEXT_SECTION_NAME
583 #define HOT_TEXT_SECTION_NAME "text.hot"
586 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
587 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME "text.unlikely"
590 #ifndef VECTOR_MODE_SUPPORTED_P
591 #define VECTOR_MODE_SUPPORTED_P(MODE) 0
594 /* Determine whether __cxa_atexit, rather than atexit, is used to
595 register C++ destructors for local statics and global objects. */
596 #ifndef DEFAULT_USE_CXA_ATEXIT
597 #define DEFAULT_USE_CXA_ATEXIT 0
600 /* Determine whether extra constraint letter should be handled
601 via address reload (like 'o'). */
602 #ifndef EXTRA_MEMORY_CONSTRAINT
603 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
606 /* Determine whether extra constraint letter should be handled
607 as an address (like 'p'). */
608 #ifndef EXTRA_ADDRESS_CONSTRAINT
609 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
612 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
613 for all the characters that it does not want to change, so things like the
614 'length' of a digit in a matching constraint is an implementation detail,
615 and not part of the interface. */
616 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
618 #ifndef CONSTRAINT_LEN
619 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
622 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
623 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
626 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
627 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
628 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
631 #ifndef REG_CLASS_FROM_CONSTRAINT
632 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
635 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
636 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
639 #ifndef REGISTER_MOVE_COST
640 #define REGISTER_MOVE_COST(m, x, y) 2
643 /* Determine whether the the entire c99 runtime
644 is present in the runtime library. */
645 #ifndef TARGET_C99_FUNCTIONS
646 #define TARGET_C99_FUNCTIONS 0
649 /* Indicate that CLZ and CTZ are undefined at zero. */
650 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
651 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
653 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
654 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
657 /* Provide a default value for STORE_FLAG_VALUE. */
658 #ifndef STORE_FLAG_VALUE
659 #define STORE_FLAG_VALUE 1
662 /* This macro is used to determine what the largest unit size that
663 move_by_pieces can use is. */
665 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
666 move efficiently, as opposed to MOVE_MAX which is the maximum
667 number of bytes we can move with a single instruction. */
669 #ifndef MOVE_MAX_PIECES
670 #define MOVE_MAX_PIECES MOVE_MAX
673 #ifndef STACK_POINTER_OFFSET
674 #define STACK_POINTER_OFFSET 0
678 #define LOCAL_REGNO(REGNO) 0
681 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
682 the stack pointer does not matter. The value is tested only in
683 functions that have frame pointers. */
684 #ifndef EXIT_IGNORE_STACK
685 #define EXIT_IGNORE_STACK 0
688 /* Assume that case vectors are not pc-relative. */
689 #ifndef CASE_VECTOR_PC_RELATIVE
690 #define CASE_VECTOR_PC_RELATIVE 0
693 #endif /* ! GCC_DEFAULTS_H */