1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 Free Software Foundation, Inc.
5 Contributed by Ron Guilmette (rfg@monkeys.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 2, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING. If not, write to the Free
21 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
24 #ifndef GCC_DEFAULTS_H
25 #define GCC_DEFAULTS_H
27 #ifndef GET_ENVIRONMENT
28 #define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
31 #define obstack_chunk_alloc ((void *(*) (long)) xmalloc)
32 #define obstack_chunk_free ((void (*) (void *)) free)
33 #define OBSTACK_CHUNK_SIZE 0
34 #define gcc_obstack_init(OBSTACK) \
35 _obstack_begin ((OBSTACK), OBSTACK_CHUNK_SIZE, 0, \
36 obstack_chunk_alloc, \
39 /* Store in OUTPUT a string (made with alloca) containing an
40 assembler-name for a local static variable or function named NAME.
41 LABELNO is an integer which is different for each call. */
44 # ifndef NO_DOT_IN_LABEL
45 # define ASM_PN_FORMAT "%s.%lu"
47 # ifndef NO_DOLLAR_IN_LABEL
48 # define ASM_PN_FORMAT "%s$%lu"
50 # define ASM_PN_FORMAT "__%s_%lu"
53 #endif /* ! ASM_PN_FORMAT */
55 #ifndef ASM_FORMAT_PRIVATE_NAME
56 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
57 do { const char *const name_ = (NAME); \
58 char *const output_ = (OUTPUT) = \
59 (char *) alloca (strlen (name_) + 32); \
60 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
64 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */
66 #ifndef ASM_OUTPUT_ASCII
67 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
69 FILE *_hide_asm_out_file = (MYFILE); \
70 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
71 int _hide_thissize = (MYLENGTH); \
73 FILE *asm_out_file = _hide_asm_out_file; \
74 const unsigned char *p = _hide_p; \
75 int thissize = _hide_thissize; \
77 fprintf (asm_out_file, "\t.ascii \""); \
79 for (i = 0; i < thissize; i++) \
82 if (c == '\"' || c == '\\') \
83 putc ('\\', asm_out_file); \
85 putc (c, asm_out_file); \
88 fprintf (asm_out_file, "\\%o", c); \
89 /* After an octal-escape, if a digit follows, \
90 terminate one string constant and start another. \
91 The VAX assembler fails to stop reading the escape \
92 after three digits, so this is the only way we \
93 can get it to parse the data properly. */ \
94 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
95 fprintf (asm_out_file, "\"\n\t.ascii \""); \
98 fprintf (asm_out_file, "\"\n"); \
104 /* This is how we tell the assembler to equate two values. */
106 #ifndef ASM_OUTPUT_DEF
107 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
108 do { fprintf ((FILE), "%s", SET_ASM_OP); \
109 assemble_name (FILE, LABEL1); \
110 fprintf (FILE, ","); \
111 assemble_name (FILE, LABEL2); \
112 fprintf (FILE, "\n"); \
117 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
118 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \
121 fprintf ((FILE), "\t.tls_common\t"); \
122 assemble_name ((FILE), (NAME)); \
123 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \
124 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \
129 /* Decide whether to defer emitting the assembler output for an equate
130 of two values. The default is to not defer output. */
131 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
132 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
135 /* This is how to output the definition of a user-level label named
136 NAME, such as the label on a static function or variable NAME. */
138 #ifndef ASM_OUTPUT_LABEL
139 #define ASM_OUTPUT_LABEL(FILE,NAME) \
140 do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
143 /* Output the definition of a compiler-generated label named NAME. */
144 #ifndef ASM_OUTPUT_INTERNAL_LABEL
145 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \
147 assemble_name_raw ((FILE), (NAME)); \
148 fputs (":\n", (FILE)); \
152 /* This is how to output a reference to a user-level label named NAME. */
154 #ifndef ASM_OUTPUT_LABELREF
155 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
158 /* Allow target to print debug info labels specially. This is useful for
159 VLIW targets, since debug info labels should go into the middle of
160 instruction bundles instead of breaking them. */
162 #ifndef ASM_OUTPUT_DEBUG_LABEL
163 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
164 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
167 /* This is how we tell the assembler that a symbol is weak. */
168 #ifndef ASM_OUTPUT_WEAK_ALIAS
169 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
170 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
173 ASM_WEAKEN_LABEL (STREAM, NAME); \
175 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
181 /* This is how we tell the assembler that a symbol is a weak alias to
182 another symbol that doesn't require the other symbol to be defined.
183 Uses of the former will turn into weak uses of the latter, i.e.,
184 uses that, in case the latter is undefined, will not cause errors,
185 and will add it to the symbol table as weak undefined. However, if
186 the latter is referenced directly, a strong reference prevails. */
187 #ifndef ASM_OUTPUT_WEAKREF
188 #if defined HAVE_GAS_WEAKREF
189 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \
192 fprintf ((FILE), "\t.weakref\t"); \
193 assemble_name ((FILE), (NAME)); \
194 fprintf ((FILE), ","); \
195 assemble_name ((FILE), (VALUE)); \
196 fprintf ((FILE), "\n"); \
202 /* How to emit a .type directive. */
203 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
204 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
205 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
208 fputs (TYPE_ASM_OP, STREAM); \
209 assemble_name (STREAM, NAME); \
210 fputs (", ", STREAM); \
211 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
212 putc ('\n', STREAM); \
218 /* How to emit a .size directive. */
219 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
221 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
224 HOST_WIDE_INT size_ = (SIZE); \
225 fputs (SIZE_ASM_OP, STREAM); \
226 assemble_name (STREAM, NAME); \
227 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
231 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
234 fputs (SIZE_ASM_OP, STREAM); \
235 assemble_name (STREAM, NAME); \
236 fputs (", .-", STREAM); \
237 assemble_name (STREAM, NAME); \
238 putc ('\n', STREAM); \
245 /* This determines whether or not we support weak symbols. */
246 #ifndef SUPPORTS_WEAK
247 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
248 #define SUPPORTS_WEAK 1
250 #define SUPPORTS_WEAK 0
254 /* This determines whether or not we support link-once semantics. */
255 #ifndef SUPPORTS_ONE_ONLY
256 #ifdef MAKE_DECL_ONE_ONLY
257 #define SUPPORTS_ONE_ONLY 1
259 #define SUPPORTS_ONE_ONLY 0
263 /* This determines whether weak symbols must be left out of a static
264 archive's table of contents. Defining this macro to be nonzero has
265 the consequence that certain symbols will not be made weak that
266 otherwise would be. The C++ ABI requires this macro to be zero;
267 see the documentation. */
268 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
269 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
272 /* This determines whether or not we need linkonce unwind information. */
273 #ifndef TARGET_USES_WEAK_UNWIND_INFO
274 #define TARGET_USES_WEAK_UNWIND_INFO 0
277 /* By default, there is no prefix on user-defined symbols. */
278 #ifndef USER_LABEL_PREFIX
279 #define USER_LABEL_PREFIX ""
282 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
283 provide a weak attribute. Else define it to nothing.
285 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
286 not available at that time.
288 Note, this is only for use by target files which we know are to be
290 #ifndef TARGET_ATTRIBUTE_WEAK
292 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
294 # define TARGET_ATTRIBUTE_WEAK
298 /* Determines whether we may use common symbols to represent one-only
299 semantics (a.k.a. "vague linkage"). */
300 #ifndef USE_COMMON_FOR_ONE_ONLY
301 # define USE_COMMON_FOR_ONE_ONLY 1
304 /* By default we can assume that all global symbols are in one namespace,
305 across all shared libraries. */
306 #ifndef MULTIPLE_SYMBOL_SPACES
307 # define MULTIPLE_SYMBOL_SPACES 0
310 /* If the target supports init_priority C++ attribute, give
311 SUPPORTS_INIT_PRIORITY a nonzero value. */
312 #ifndef SUPPORTS_INIT_PRIORITY
313 #define SUPPORTS_INIT_PRIORITY 1
314 #endif /* SUPPORTS_INIT_PRIORITY */
316 /* If duplicate library search directories can be removed from a
317 linker command without changing the linker's semantics, give this
319 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
320 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
321 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
323 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
324 the rest of the DWARF 2 frame unwind support is also provided. */
325 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
326 #define DWARF2_UNWIND_INFO 1
329 /* If we have named sections, and we're using crtstuff to run ctors,
330 use them for registering eh frame information. */
331 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
332 && !defined(EH_FRAME_IN_DATA_SECTION)
333 #ifndef EH_FRAME_SECTION_NAME
334 #define EH_FRAME_SECTION_NAME ".eh_frame"
338 /* On many systems, different EH table encodings are used under
339 difference circumstances. Some will require runtime relocations;
340 some will not. For those that do not require runtime relocations,
341 we would like to make the table read-only. However, since the
342 read-only tables may need to be combined with read-write tables
343 that do require runtime relocation, it is not safe to make the
344 tables read-only unless the linker will merge read-only and
345 read-write sections into a single read-write section. If your
346 linker does not have this ability, but your system is such that no
347 encoding used with non-PIC code will ever require a runtime
348 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
349 your target configuration file. */
350 #ifndef EH_TABLES_CAN_BE_READ_ONLY
351 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
352 #define EH_TABLES_CAN_BE_READ_ONLY 1
354 #define EH_TABLES_CAN_BE_READ_ONLY 0
358 /* If we have named section and we support weak symbols, then use the
359 .jcr section for recording java classes which need to be registered
360 at program start-up time. */
361 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
362 #ifndef JCR_SECTION_NAME
363 #define JCR_SECTION_NAME ".jcr"
367 /* This decision to use a .jcr section can be overridden by defining
368 USE_JCR_SECTION to 0 in target file. This is necessary if target
369 can define JCR_SECTION_NAME but does not have crtstuff or
370 linker support for .jcr section. */
371 #ifndef TARGET_USE_JCR_SECTION
372 #ifdef JCR_SECTION_NAME
373 #define TARGET_USE_JCR_SECTION 1
375 #define TARGET_USE_JCR_SECTION 0
379 /* Number of hardware registers that go into the DWARF-2 unwind info.
380 If not defined, equals FIRST_PSEUDO_REGISTER */
382 #ifndef DWARF_FRAME_REGISTERS
383 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
386 /* How to renumber registers for dbx and gdb. If not defined, assume
387 no renumbering is necessary. */
389 #ifndef DBX_REGISTER_NUMBER
390 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
393 /* Default sizes for base C types. If the sizes are different for
394 your target, you should override these values by defining the
395 appropriate symbols in your tm.h file. */
397 #ifndef BITS_PER_UNIT
398 #define BITS_PER_UNIT 8
401 #ifndef BITS_PER_WORD
402 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
405 #ifndef CHAR_TYPE_SIZE
406 #define CHAR_TYPE_SIZE BITS_PER_UNIT
409 #ifndef BOOL_TYPE_SIZE
410 /* `bool' has size and alignment `1', on almost all platforms. */
411 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
414 #ifndef SHORT_TYPE_SIZE
415 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
418 #ifndef INT_TYPE_SIZE
419 #define INT_TYPE_SIZE BITS_PER_WORD
422 #ifndef LONG_TYPE_SIZE
423 #define LONG_TYPE_SIZE BITS_PER_WORD
426 #ifndef LONG_LONG_TYPE_SIZE
427 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
430 #ifndef WCHAR_TYPE_SIZE
431 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
434 #ifndef FLOAT_TYPE_SIZE
435 #define FLOAT_TYPE_SIZE BITS_PER_WORD
438 #ifndef DOUBLE_TYPE_SIZE
439 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
442 #ifndef LONG_DOUBLE_TYPE_SIZE
443 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
446 #ifndef DECIMAL32_TYPE_SIZE
447 #define DECIMAL32_TYPE_SIZE 32
450 #ifndef DECIMAL64_TYPE_SIZE
451 #define DECIMAL64_TYPE_SIZE 64
454 #ifndef DECIMAL128_TYPE_SIZE
455 #define DECIMAL128_TYPE_SIZE 128
458 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
460 #define POINTER_SIZE BITS_PER_WORD
463 #ifndef PIC_OFFSET_TABLE_REGNUM
464 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
467 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
468 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
471 #ifndef TARGET_DECLSPEC
472 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
473 /* If the target supports the "dllimport" attribute, users are
474 probably used to the "__declspec" syntax. */
475 #define TARGET_DECLSPEC 1
477 #define TARGET_DECLSPEC 0
481 /* By default, the preprocessor should be invoked the same way in C++
483 #ifndef CPLUSPLUS_CPP_SPEC
485 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
489 #ifndef ACCUMULATE_OUTGOING_ARGS
490 #define ACCUMULATE_OUTGOING_ARGS 0
493 /* Supply a default definition for PUSH_ARGS. */
496 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
502 /* Decide whether a function's arguments should be processed
503 from first to last or from last to first.
505 They should if the stack and args grow in opposite directions, but
506 only if we have push insns. */
510 #ifndef PUSH_ARGS_REVERSED
511 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
512 #define PUSH_ARGS_REVERSED PUSH_ARGS
518 #ifndef PUSH_ARGS_REVERSED
519 #define PUSH_ARGS_REVERSED 0
522 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
523 STACK_BOUNDARY is required. */
524 #ifndef PREFERRED_STACK_BOUNDARY
525 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
528 #ifndef TARGET_DEFAULT_PACK_STRUCT
529 #define TARGET_DEFAULT_PACK_STRUCT 0
532 /* By default, the C++ compiler will use function addresses in the
533 vtable entries. Setting this nonzero tells the compiler to use
534 function descriptors instead. The value of this macro says how
535 many words wide the descriptor is (normally 2). It is assumed
536 that the address of a function descriptor may be treated as a
537 pointer to a function. */
538 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
539 #define TARGET_VTABLE_USES_DESCRIPTORS 0
542 /* By default, the vtable entries are void pointers, the so the alignment
543 is the same as pointer alignment. The value of this macro specifies
544 the alignment of the vtable entry in bits. It should be defined only
545 when special alignment is necessary. */
546 #ifndef TARGET_VTABLE_ENTRY_ALIGN
547 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
550 /* There are a few non-descriptor entries in the vtable at offsets below
551 zero. If these entries must be padded (say, to preserve the alignment
552 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
553 words in each data entry. */
554 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
555 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
558 /* Decide whether it is safe to use a local alias for a virtual function
559 when constructing thunks. */
560 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
561 #ifdef ASM_OUTPUT_DEF
562 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
564 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
568 /* Select a format to encode pointers in exception handling data. We
569 prefer those that result in fewer dynamic relocations. Assume no
570 special support here and encode direct references. */
571 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
572 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
575 /* By default, the C++ compiler will use the lowest bit of the pointer
576 to function to indicate a pointer-to-member-function points to a
577 virtual member function. However, if FUNCTION_BOUNDARY indicates
578 function addresses aren't always even, the lowest bit of the delta
579 field will be used. */
580 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
581 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
582 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
583 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
586 #ifndef DEFAULT_GDB_EXTENSIONS
587 #define DEFAULT_GDB_EXTENSIONS 1
590 /* If more than one debugging type is supported, you must define
591 PREFERRED_DEBUGGING_TYPE to choose the default. */
593 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
594 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
595 + defined (VMS_DEBUGGING_INFO))
596 #ifndef PREFERRED_DEBUGGING_TYPE
597 #error You must define PREFERRED_DEBUGGING_TYPE
598 #endif /* no PREFERRED_DEBUGGING_TYPE */
600 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
601 here so other code needn't care. */
602 #elif defined DBX_DEBUGGING_INFO
603 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
605 #elif defined SDB_DEBUGGING_INFO
606 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
608 #elif defined DWARF2_DEBUGGING_INFO
609 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
611 #elif defined VMS_DEBUGGING_INFO
612 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
614 #elif defined XCOFF_DEBUGGING_INFO
615 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
618 /* No debugging format is supported by this target. */
619 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
622 /* Define codes for all the float formats that we know of. */
623 #define UNKNOWN_FLOAT_FORMAT 0
624 #define IEEE_FLOAT_FORMAT 1
625 #define VAX_FLOAT_FORMAT 2
626 #define IBM_FLOAT_FORMAT 3
627 #define C4X_FLOAT_FORMAT 4
629 /* Default to IEEE float if not specified. Nearly all machines use it. */
630 #ifndef TARGET_FLOAT_FORMAT
631 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
634 /* Some macros can be defined by the backend in either a mode-dependent
635 or mode-independent form. The compiler proper should only use the
636 mode-dependent form, providing VOIDmode when the mode is unknown.
637 We can't poison the macros because the backend may reference them. */
639 #ifndef REGNO_MODE_OK_FOR_BASE_P
640 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) REGNO_OK_FOR_BASE_P (REGNO)
643 #ifndef REG_MODE_OK_FOR_BASE_P
644 #define REG_MODE_OK_FOR_BASE_P(REG, MODE) REG_OK_FOR_BASE_P (REG)
647 /* Determine the register class for registers suitable to be the base
648 address register in a MEM. Allow the choice to be dependent upon
649 the mode of the memory access. */
650 #ifndef MODE_BASE_REG_CLASS
651 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
654 /* Some machines require a different base register class if the index
655 is a register. By default, assume that a base register is acceptable. */
656 #ifndef MODE_BASE_REG_REG_CLASS
657 #define MODE_BASE_REG_REG_CLASS(MODE) MODE_BASE_REG_CLASS(MODE)
660 #ifndef REGNO_MODE_OK_FOR_REG_BASE_P
661 #define REGNO_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE)
664 #ifndef REG_MODE_OK_FOR_REG_BASE_P
665 #define REG_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REG_MODE_OK_FOR_BASE_P (REGNO, MODE)
668 #ifndef LARGEST_EXPONENT_IS_NORMAL
669 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
672 #ifndef ROUND_TOWARDS_ZERO
673 #define ROUND_TOWARDS_ZERO 0
676 #ifndef MODE_HAS_NANS
677 #define MODE_HAS_NANS(MODE) \
678 (FLOAT_MODE_P (MODE) \
679 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
680 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
683 #ifndef MODE_HAS_INFINITIES
684 #define MODE_HAS_INFINITIES(MODE) \
685 (FLOAT_MODE_P (MODE) \
686 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
687 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
690 #ifndef MODE_HAS_SIGNED_ZEROS
691 #define MODE_HAS_SIGNED_ZEROS(MODE) \
692 (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
695 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
696 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
697 (FLOAT_MODE_P (MODE) \
698 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
699 && !ROUND_TOWARDS_ZERO)
702 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
703 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
706 /* True if the targets integer-comparison functions return { 0, 1, 2
707 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
708 instead. The libgcc routines are biased. */
709 #ifndef TARGET_LIB_INT_CMP_BIASED
710 #define TARGET_LIB_INT_CMP_BIASED (true)
713 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
714 then the word-endianness is the same as for integers. */
715 #ifndef FLOAT_WORDS_BIG_ENDIAN
716 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
719 #ifndef TARGET_FLT_EVAL_METHOD
720 #define TARGET_FLT_EVAL_METHOD 0
723 #ifndef TARGET_DEC_EVAL_METHOD
724 #define TARGET_DEC_EVAL_METHOD 2
727 #ifndef HOT_TEXT_SECTION_NAME
728 #define HOT_TEXT_SECTION_NAME ".text.hot"
731 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
732 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
735 #ifndef HAS_LONG_COND_BRANCH
736 #define HAS_LONG_COND_BRANCH 0
739 #ifndef HAS_LONG_UNCOND_BRANCH
740 #define HAS_LONG_UNCOND_BRANCH 0
743 /* By default, only attempt to parallelize bitwise operations, and
744 possibly adds/subtracts using bit-twiddling. */
745 #ifndef UNITS_PER_SIMD_WORD
746 #define UNITS_PER_SIMD_WORD UNITS_PER_WORD
749 /* Determine whether __cxa_atexit, rather than atexit, is used to
750 register C++ destructors for local statics and global objects. */
751 #ifndef DEFAULT_USE_CXA_ATEXIT
752 #define DEFAULT_USE_CXA_ATEXIT 0
755 /* Determine whether extra constraint letter should be handled
756 via address reload (like 'o'). */
757 #ifndef EXTRA_MEMORY_CONSTRAINT
758 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
761 /* Determine whether extra constraint letter should be handled
762 as an address (like 'p'). */
763 #ifndef EXTRA_ADDRESS_CONSTRAINT
764 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
767 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
768 for all the characters that it does not want to change, so things like the
769 'length' of a digit in a matching constraint is an implementation detail,
770 and not part of the interface. */
771 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
773 #ifndef CONSTRAINT_LEN
774 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
777 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
778 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
781 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
782 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
783 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
786 #ifndef REG_CLASS_FROM_CONSTRAINT
787 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
790 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
791 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
794 #ifndef REGISTER_MOVE_COST
795 #define REGISTER_MOVE_COST(m, x, y) 2
798 /* Determine whether the entire c99 runtime
799 is present in the runtime library. */
800 #ifndef TARGET_C99_FUNCTIONS
801 #define TARGET_C99_FUNCTIONS 0
804 /* Indicate that CLZ and CTZ are undefined at zero. */
805 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
806 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
808 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
809 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
812 /* Provide a default value for STORE_FLAG_VALUE. */
813 #ifndef STORE_FLAG_VALUE
814 #define STORE_FLAG_VALUE 1
817 /* This macro is used to determine what the largest unit size that
818 move_by_pieces can use is. */
820 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
821 move efficiently, as opposed to MOVE_MAX which is the maximum
822 number of bytes we can move with a single instruction. */
824 #ifndef MOVE_MAX_PIECES
825 #define MOVE_MAX_PIECES MOVE_MAX
828 #ifndef STACK_POINTER_OFFSET
829 #define STACK_POINTER_OFFSET 0
833 #define LOCAL_REGNO(REGNO) 0
836 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
837 the stack pointer does not matter. The value is tested only in
838 functions that have frame pointers. */
839 #ifndef EXIT_IGNORE_STACK
840 #define EXIT_IGNORE_STACK 0
843 /* Assume that case vectors are not pc-relative. */
844 #ifndef CASE_VECTOR_PC_RELATIVE
845 #define CASE_VECTOR_PC_RELATIVE 0
848 /* Assume that trampolines need function alignment. */
849 #ifndef TRAMPOLINE_ALIGNMENT
850 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
853 /* Register mappings for target machines without register windows. */
854 #ifndef INCOMING_REGNO
855 #define INCOMING_REGNO(N) (N)
858 #ifndef OUTGOING_REGNO
859 #define OUTGOING_REGNO(N) (N)
862 #ifndef SHIFT_COUNT_TRUNCATED
863 #define SHIFT_COUNT_TRUNCATED 0
866 #ifndef LEGITIMIZE_ADDRESS
867 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
870 #ifndef LEGITIMATE_PIC_OPERAND_P
871 #define LEGITIMATE_PIC_OPERAND_P(X) 1
874 #ifndef REVERSIBLE_CC_MODE
875 #define REVERSIBLE_CC_MODE(MODE) 0
878 /* Biggest alignment supported by the object file format of this machine. */
879 #ifndef MAX_OFILE_ALIGNMENT
880 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
883 #ifndef FRAME_GROWS_DOWNWARD
884 #define FRAME_GROWS_DOWNWARD 0
887 /* On most machines, the CFA coincides with the first incoming parm. */
888 #ifndef ARG_POINTER_CFA_OFFSET
889 #define ARG_POINTER_CFA_OFFSET(FNDECL) FIRST_PARM_OFFSET (FNDECL)
892 /* The offset from the incoming value of %sp to the top of the stack frame
893 for the current function. */
894 #ifndef INCOMING_FRAME_SP_OFFSET
895 #define INCOMING_FRAME_SP_OFFSET 0
898 #endif /* ! GCC_DEFAULTS_H */