darwin.h

Mac OS X 10.4.9 for x86 Source Code gcc 实现源代码

#undef VECTOR_SAVE_INLINE
#define VECTOR_SAVE_INLINE(FIRST_REG) \
  (((FIRST_REG) >= LAST_ALTIVEC_REGNO - 1 && (FIRST_REG) <= LAST_ALTIVEC_REGNO) \
   || TARGET_LONG_BRANCH)
/* APPLE LOCAL end long-branch */

/* Darwin uses a function call if everything needs to be saved/restored.  */
#undef WORLD_SAVE_P
#define WORLD_SAVE_P(INFO) ((INFO)->world_save_p)

/* The assembler wants the alternate register names, but without
   leading percent sign.  */
#undef REGISTER_NAMES
#define REGISTER_NAMES							\
{									\
     "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",		\
     "r8",  "r9", "r10", "r11", "r12", "r13", "r14", "r15",		\
    "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",		\
    "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",		\
     "f0",  "f1",  "f2",  "f3",  "f4",  "f5",  "f6",  "f7",		\
     "f8",  "f9", "f10", "f11", "f12", "f13", "f14", "f15",		\
    "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",		\
    "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",		\
     "mq",  "lr", "ctr",  "ap",						\
    "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7",		\
    "xer",								\
     "v0",  "v1",  "v2",  "v3",  "v4",  "v5",  "v6",  "v7",             \
     "v8",  "v9", "v10", "v11", "v12", "v13", "v14", "v15",             \
    "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23",             \
    "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31",             \
    "vrsave", "vscr",							\
    "spe_acc", "spefscr"                                                \
}

/* This outputs NAME to FILE.  */

#undef  RS6000_OUTPUT_BASENAME
#define RS6000_OUTPUT_BASENAME(FILE, NAME)	\
    assemble_name (FILE, NAME)

/* Globalizing directive for a label.  */
#undef GLOBAL_ASM_OP
#define GLOBAL_ASM_OP "\t.globl "
#undef TARGET_ASM_GLOBALIZE_LABEL

/* This is how to output an internal label prefix.  rs6000.c uses this
   when generating traceback tables.  */
/* Not really used for Darwin?  */

#undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
#define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX)	\
  fprintf (FILE, "%s", PREFIX)

/* This says how to output an assembler line to define a global common
   symbol.  */
/* ? */
#undef  ASM_OUTPUT_ALIGNED_COMMON
#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)			\
  do {									\
    unsigned HOST_WIDE_INT _new_size = SIZE;				\
    fputs (".comm ", (FILE));						\
    RS6000_OUTPUT_BASENAME ((FILE), (NAME));				\
    if (_new_size == 0) _new_size = 1;					\
    fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", _new_size);	\
  } while (0)

/* Override the standard rs6000 definition.  */

#undef ASM_COMMENT_START
#define ASM_COMMENT_START ";"

/* APPLE LOCAL reduce code size */
/* Don't define SAVE_FP_PREFIX and friends */

/* This is how to output an assembler line that says to advance
   the location counter to a multiple of 2**LOG bytes using the
   "nop" instruction as padding.  */

#define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG)                   \
  do                                                          \
    {                                                         \
      if ((LOG) < 3)                                          \
        {                                                     \
          ASM_OUTPUT_ALIGN (FILE,LOG);                        \
        }                                                     \
      else /* nop == ori r0,r0,0 */                           \
        fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG));  \
    } while (0)


/* APPLE LOCAL begin -falign-loops-max-skip mainline 2005-04-22  */
#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
/* This is supported in cctools 465 and later.  The macro test
   above prevents using it in earlier build environments.  */
#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)          \
  if ((LOG) != 0)                                             \
    {                                                         \
      if ((MAX_SKIP) == 0)                                    \
        fprintf ((FILE), "\t.p2align %d\n", (LOG));           \
      else                                                    \
        fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
    }
#endif
/* APPLE LOCAL end -falign-loops-max-skip mainline 2005-04-22  */

/* Generate insns to call the profiler.  */

#define PROFILE_HOOK(LABEL)   output_profile_hook (LABEL)

/* Function name to call to do profiling.  */

#define RS6000_MCOUNT "*mcount"

/* APPLE LOCAL begin 4298879.  */
/* Default processor (for -mtune): G5 when not optimizing for size othwerise G4. 
   It is G5 by default for 64-bit in all cases.  */
/* APPLE LOCAL end 4298879.  */
#undef PROCESSOR_DEFAULT
/* APPLE LOCAL 4298879.  */
#define PROCESSOR_DEFAULT  (optimize_size ? PROCESSOR_PPC7400 : PROCESSOR_POWER4)
#undef PROCESSOR_DEFAULT64
#define PROCESSOR_DEFAULT64  PROCESSOR_POWER4

/* Default target flag settings.  Despite the fact that STMW/LMW
   serializes, it's still a big code size win to use them.  Use FSEL by
   default as well.  */

#undef  TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_POWERPC | MASK_MULTIPLE | MASK_NEW_MNEMONICS \
                      | MASK_PPC_GFXOPT)

/* Darwin only runs on PowerPC, so short-circuit POWER patterns.  */
#undef  TARGET_POWER
#define TARGET_POWER 0

/* Since Darwin doesn't do TOCs, stub this out.  */

#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE)  0

/* Unlike most other PowerPC targets, chars are signed, for
   consistency with other Darwin architectures.  */

#undef DEFAULT_SIGNED_CHAR
#define DEFAULT_SIGNED_CHAR (1)

/* Given an rtx X being reloaded into a reg required to be      
   in class CLASS, return the class of reg to actually use.     
   In general this is just CLASS; but on some machines
   in some cases it is preferable to use a more restrictive class.
  
   On the RS/6000, we have to return NO_REGS when we want to reload a
   floating-point CONST_DOUBLE to force it to be copied to memory.

   Don't allow R0 when loading the address of, or otherwise furtling with,
   a SYMBOL_REF.  */

#undef PREFERRED_RELOAD_CLASS
#define PREFERRED_RELOAD_CLASS(X,CLASS)				\
  ((CONSTANT_P (X)						\
    && reg_classes_intersect_p ((CLASS), FLOAT_REGS))		\
   ? NO_REGS							\
   : ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH)	\
      && reg_class_subset_p (BASE_REGS, (CLASS)))		\
   ? BASE_REGS							\
   : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT			\
      && (CLASS) == NON_SPECIAL_REGS)				\
   ? GENERAL_REGS						\
   : (CLASS))

/* APPLE LOCAL begin Macintosh alignment 2002-2-26 --ff */
/* This now supports the Macintosh power, mac68k, and natural 
   alignment modes.  It now has one more parameter than the standard 
   version of the ADJUST_FIELD_ALIGN macro.  
   
   The macro works as follows: We use the computed alignment of the 
   field if we are in the natural alignment mode or if the field is 
   a vector.  Otherwise, if we are in the mac68k alignment mode, we
   use the minimum of the computed alignment and 16 (pegging at
   2-byte alignment).  If we are in the power mode, we peg at 32
   (word alignment) unless it is the first field of the struct, in 
   which case we use the computed alignment.  */
#undef ADJUST_FIELD_ALIGN
#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED, FIRST_FIELD_P)	\
  (TARGET_ALIGN_NATURAL ? (COMPUTED) :				\
   (((COMPUTED) == RS6000_VECTOR_ALIGNMENT)			\
    ? RS6000_VECTOR_ALIGNMENT					\
    : (MIN ((COMPUTED), 					\
    	    (TARGET_ALIGN_MAC68K ? 16 				\
    	    			 : ((FIRST_FIELD_P) ? (COMPUTED) \
    	    			 		    : 32))))))

#undef ROUND_TYPE_ALIGN
/* Macintosh alignment modes require more complicated handling
   of alignment, so we replace the macro with a call to a
   out-of-line function.  */
union tree_node;
extern unsigned round_type_align (union tree_node*, unsigned, unsigned); /* rs6000.c  */
#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED)	\
  round_type_align(STRUCT, COMPUTED, SPECIFIED)
/* APPLE LOCAL end Macintosh alignment 2002-2-26 --ff */

/* APPLE LOCAL begin alignment */
/* Make sure local alignments come from the type node, not the mode;
   mode-based alignments are wrong for vectors.  */
#undef LOCAL_ALIGNMENT
#define LOCAL_ALIGNMENT(TYPE, ALIGN)			\
  (MIN (BIGGEST_ALIGNMENT,				\
	MAX ((unsigned) ALIGN, TYPE_ALIGN (TYPE))))
/* APPLE LOCAL end alignment */

/* Specify padding for the last element of a block move between
   registers and memory.  FIRST is nonzero if this is the only
   element.  */
#define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
  (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))

/* XXX: Darwin supports neither .quad, or .llong, but it also doesn't
   support 64 bit PowerPC either, so this just keeps things happy.  */
#define DOUBLE_INT_ASM_OP "\t.quad\t"

/* APPLE LOCAL begin branch cost */
#undef BRANCH_COST
/* Better code is generated by saying conditional branches take 1 tick.  */
#define BRANCH_COST	1
/* APPLE LOCAL end branch cost */

/* APPLE LOCAL begin indirect calls in R12 */
/* Address of indirect call must be computed here */
#define MAGIC_INDIRECT_CALL_REG 12
/* APPLE LOCAL end indirect calls in R12 */

/* For binary compatibility with 2.95; Darwin C APIs use bool from
   stdbool.h, which was an int-sized enum in 2.95.  Users can explicitly
   choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */
extern const char *darwin_one_byte_bool;
#define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE)

#undef REGISTER_TARGET_PRAGMAS
#define REGISTER_TARGET_PRAGMAS DARWIN_REGISTER_TARGET_PRAGMAS

#ifdef IN_LIBGCC2
#include <stdbool.h>
#endif

#define MD_UNWIND_SUPPORT "config/rs6000/darwin-unwind.h"

#define HAS_MD_FALLBACK_FRAME_STATE_FOR 1

/* APPLE LOCAL begin mainline to be accessed, 5 nops */
/* True, iff we're generating fast turn around debugging code.  When
   true, we arrange for function prologues to start with 5 nops so
   that gdb may insert code to redirect them, and for data to be
   accessed indirectly.  The runtime uses this indirection to forward
   references for data to the original instance of that data.  */
/* APPLE LOCAL end mainline to be accessed, 5 nops */

#define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue)
/* APPLE LOCAL begin mainline 2005-09-01 3449986 */

/* Old versions of Mac OS/Darwin don't have C99 functions available.  */
#undef TARGET_C99_FUNCTIONS
#define TARGET_C99_FUNCTIONS					\
  (TARGET_64BIT							\
   || (darwin_macosx_version_min				\
       && strverscmp (darwin_macosx_version_min, "10.3") >= 0))
/* APPLE LOCAL end mainline 2005-09-01 3449986 */

/* APPLE LOCAL begin x86_64 */
#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)	\
  if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1))       \
    {				                                         \
	  darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);            \
	  goto DONE;                                             \
    }
/* APPLE LOCAL end x86_64 */