mips.h

GCC编译器源代码

/* ASM_SPEC is the set of arguments to pass to the assembler.  */

#define ASM_SPEC "\
%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
%(subtarget_asm_optimizing_spec) \
%(subtarget_asm_debugging_spec) \
%{membedded-pic} \
%{mabi=32:-32}%{mabi=o32:-32}%{mabi=n32:-n32}%{mabi=64:-64}%{mabi=n64:-64} \
%(target_asm_spec) \
%(subtarget_asm_spec)"

/* Specify to run a post-processor, mips-tfile after the assembler
   has run to stuff the mips debug information into the object file.
   This is needed because the $#!%^ MIPS assembler provides no way
   of specifying such information in the assembly file.  If we are
   cross compiling, disable mips-tfile unless the user specifies
   -mmips-tfile.  */

#ifndef ASM_FINAL_SPEC
#if ((TARGET_CPU_DEFAULT | TARGET_DEFAULT) & MASK_GAS) != 0
/* GAS */
#define ASM_FINAL_SPEC "\
%{mmips-as: %{!mno-mips-tfile: \
	\n mips-tfile %{v*: -v} \
		%{K: -I %b.o~} \
		%{!K: %{save-temps: -I %b.o~}} \
		%{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
		%{.s:%i} %{!.s:%g.s}}}"

#else
/* not GAS */
#define ASM_FINAL_SPEC "\
%{!mgas: %{!mno-mips-tfile: \
	\n mips-tfile %{v*: -v} \
		%{K: -I %b.o~} \
		%{!K: %{save-temps: -I %b.o~}} \
		%{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
		%{.s:%i} %{!.s:%g.s}}}"

#endif
#endif	/* ASM_FINAL_SPEC */

/* Redefinition of libraries used.  Mips doesn't support normal
   UNIX style profiling via calling _mcount.  It does offer
   profiling that samples the PC, so do what we can... */

#ifndef LIB_SPEC
#define LIB_SPEC "%{pg:-lprof1} %{p:-lprof1} -lc"
#endif

/* Extra switches sometimes passed to the linker.  */
/* ??? The bestGnum will never be passed to the linker, because the gcc driver
  will interpret it as a -b option.  */

#ifndef LINK_SPEC
#define LINK_SPEC "\
%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
%{bestGnum} %{shared} %{non_shared} \
%(linker_endian_spec)"
#endif	/* LINK_SPEC defined */

/* Specs for the compiler proper */

/* SUBTARGET_CC1_SPEC is passed to the compiler proper.  It may be
   overridden by subtargets.  */
#ifndef SUBTARGET_CC1_SPEC
#define SUBTARGET_CC1_SPEC ""
#endif

/* CC1_SPEC is the set of arguments to pass to the compiler proper.  */

#ifndef CC1_SPEC
#define CC1_SPEC "\
%{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \
%{mips1:-mfp32 -mgp32} %{mips2:-mfp32 -mgp32}\
%{mips3:%{!msingle-float:%{!m4650:-mfp64}} -mgp64} \
%{mips4:%{!msingle-float:%{!m4650:-mfp64}} -mgp64} \
%{mfp64:%{msingle-float:%emay not use both -mfp64 and -msingle-float}} \
%{mfp64:%{m4650:%emay not use both -mfp64 and -m4650}} \
%{m4650:-mcpu=r4650} \
%{m3900:-mips1 -mcpu=r3900 -mfp32 -mgp32} \
%{G*} %{EB:-meb} %{EL:-mel} %{EB:%{EL:%emay not use both -EB and -EL}} \
%{pic-none:   -mno-half-pic} \
%{pic-lib:    -mhalf-pic} \
%{pic-extern: -mhalf-pic} \
%{pic-calls:  -mhalf-pic} \
%{save-temps: } \
%(subtarget_cc1_spec) "
#endif

/* Preprocessor specs.  */

/* SUBTARGET_CPP_SIZE_SPEC defines SIZE_TYPE and PTRDIFF_TYPE.  It may
   be overridden by subtargets.  */

#ifndef SUBTARGET_CPP_SIZE_SPEC
#define SUBTARGET_CPP_SIZE_SPEC "\
%{mlong64:-D__SIZE_TYPE__=long\\ unsigned\\ int -D__PTRDIFF_TYPE__=long\\ int} \
%{!mlong64:-D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int}"
#endif

/* SUBTARGET_CPP_SPEC is passed to the preprocessor.  It may be
   overridden by subtargets.  */
#ifndef SUBTARGET_CPP_SPEC
#define SUBTARGET_CPP_SPEC ""
#endif

/* If we're using 64bit longs, then we have to define __LONG_MAX__
   correctly.  Similarly for 64bit ints and __INT_MAX__.  */
#ifndef LONG_MAX_SPEC
#if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_LONG64)
#define LONG_MAX_SPEC "%{!mno-long64:-D__LONG_MAX__=9223372036854775807L}"
#else
#define LONG_MAX_SPEC "%{mlong64:-D__LONG_MAX__=9223372036854775807L}"
#endif
#endif

/* CPP_SPEC is the set of arguments to pass to the preprocessor.  */

#ifndef CPP_SPEC
#define CPP_SPEC "\
%{.cc:	-D__LANGUAGE_C_PLUS_PLUS -D_LANGUAGE_C_PLUS_PLUS} \
%{.cxx:	-D__LANGUAGE_C_PLUS_PLUS -D_LANGUAGE_C_PLUS_PLUS} \
%{.C:	-D__LANGUAGE_C_PLUS_PLUS -D_LANGUAGE_C_PLUS_PLUS} \
%{.m:	-D__LANGUAGE_OBJECTIVE_C -D_LANGUAGE_OBJECTIVE_C -D__LANGUAGE_C -D_LANGUAGE_C} \
%{.S:	-D__LANGUAGE_ASSEMBLY -D_LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
%{.s:	-D__LANGUAGE_ASSEMBLY -D_LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
%{!.S: %{!.s: %{!.cc: %{!.cxx: %{!.C: %{!.m: -D__LANGUAGE_C -D_LANGUAGE_C %{!ansi:-DLANGUAGE_C}}}}}}} \
%(subtarget_cpp_size_spec) \
%{mips3:-U__mips -D__mips=3 -D__mips64} \
%{mips4:-U__mips -D__mips=4 -D__mips64} \
%{mgp32:-U__mips64} %{mgp64:-D__mips64} \
%{msingle-float:%{!msoft-float:-D__mips_single_float}} \
%{m4650:%{!msoft-float:-D__mips_single_float}} \
%{msoft-float:-D__mips_soft_float} \
%{mabi=eabi:-D__mips_eabi} \
%{EB:-UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__ -D_MIPSEB -D__MIPSEB -D__MIPSEB__ %{!ansi:-DMIPSEB}} \
%{EL:-UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__ -D_MIPSEL -D__MIPSEL -D__MIPSEL__ %{!ansi:-DMIPSEL}} \
%(long_max_spec) \
%(subtarget_cpp_spec) "
#endif

/* This macro defines names of additional specifications to put in the specs
   that can be used in various specifications like CC1_SPEC.  Its definition
   is an initializer with a subgrouping for each command option.

   Each subgrouping contains a string constant, that defines the
   specification name, and a string constant that used by the GNU CC driver
   program.

   Do not define this macro if it does not need to do anything.  */

#define EXTRA_SPECS							\
  { "subtarget_cc1_spec", SUBTARGET_CC1_SPEC },				\
  { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC },				\
  { "subtarget_cpp_size_spec", SUBTARGET_CPP_SIZE_SPEC },		\
  { "long_max_spec", LONG_MAX_SPEC },					\
  { "mips_as_asm_spec", MIPS_AS_ASM_SPEC },				\
  { "gas_asm_spec", GAS_ASM_SPEC },					\
  { "target_asm_spec", TARGET_ASM_SPEC },				\
  { "subtarget_mips_as_asm_spec", SUBTARGET_MIPS_AS_ASM_SPEC },		\
  { "subtarget_asm_optimizing_spec", SUBTARGET_ASM_OPTIMIZING_SPEC },	\
  { "subtarget_asm_debugging_spec", SUBTARGET_ASM_DEBUGGING_SPEC },	\
  { "subtarget_asm_spec", SUBTARGET_ASM_SPEC },				\
  { "linker_endian_spec", LINKER_ENDIAN_SPEC },				\
  SUBTARGET_EXTRA_SPECS

#ifndef SUBTARGET_EXTRA_SPECS
#define SUBTARGET_EXTRA_SPECS
#endif

/* If defined, this macro is an additional prefix to try after
   `STANDARD_EXEC_PREFIX'.  */

#ifndef MD_EXEC_PREFIX
#define MD_EXEC_PREFIX "/usr/lib/cmplrs/cc/"
#endif

#ifndef MD_STARTFILE_PREFIX
#define MD_STARTFILE_PREFIX "/usr/lib/cmplrs/cc/"
#endif


/* Print subsidiary information on the compiler version in use.  */

#define MIPS_VERSION "[AL 1.1, MM 40]"

#ifndef MACHINE_TYPE
#define MACHINE_TYPE "BSD Mips"
#endif

#ifndef TARGET_VERSION_INTERNAL
#define TARGET_VERSION_INTERNAL(STREAM)					\
  fprintf (STREAM, " %s %s", MIPS_VERSION, MACHINE_TYPE)
#endif

#ifndef TARGET_VERSION
#define TARGET_VERSION TARGET_VERSION_INTERNAL (stderr)
#endif


#define SDB_DEBUGGING_INFO		/* generate info for mips-tfile */
#define DBX_DEBUGGING_INFO		/* generate stabs (OSF/rose) */
#define MIPS_DEBUGGING_INFO		/* MIPS specific debugging info */

#ifndef PREFERRED_DEBUGGING_TYPE	/* assume SDB_DEBUGGING_INFO */
#define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
#endif

/* By default, turn on GDB extensions.  */
#define DEFAULT_GDB_EXTENSIONS 1

/* If we are passing smuggling stabs through the MIPS ECOFF object
   format, put a comment in front of the .stab<x> operation so
   that the MIPS assembler does not choke.  The mips-tfile program
   will correctly put the stab into the object file.  */

#define ASM_STABS_OP	((TARGET_GAS) ? ".stabs" : " #.stabs")
#define ASM_STABN_OP	((TARGET_GAS) ? ".stabn" : " #.stabn")
#define ASM_STABD_OP	((TARGET_GAS) ? ".stabd" : " #.stabd")

/* Local compiler-generated symbols must have a prefix that the assembler
   understands.   By default, this is $, although some targets (e.g.,
   NetBSD-ELF) need to override this. */

#ifndef LOCAL_LABEL_PREFIX
#define LOCAL_LABEL_PREFIX	"$"
#endif

/* By default on the mips, external symbols do not have an underscore
   prepended, but some targets (e.g., NetBSD) require this. */

#ifndef USER_LABEL_PREFIX
#define USER_LABEL_PREFIX	""
#endif

/* Forward references to tags are allowed.  */
#define SDB_ALLOW_FORWARD_REFERENCES

/* Unknown tags are also allowed.  */
#define SDB_ALLOW_UNKNOWN_REFERENCES

/* On Sun 4, this limit is 2048.  We use 1500 to be safe,
   since the length can run past this up to a continuation point.  */
#define DBX_CONTIN_LENGTH 1500

/* How to renumber registers for dbx and gdb. */
#define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[ (REGNO) ]

/* The mapping from gcc register number to DWARF 2 CFA column number.
   This mapping does not allow for tracking register 0, since SGI's broken
   dwarf reader thinks column 0 is used for the frame address, but since
   register 0 is fixed this is not a problem.  */
#define DWARF_FRAME_REGNUM(REG)				\
  (REG == GP_REG_FIRST + 31 ? DWARF_FRAME_RETURN_COLUMN : REG)

/* The DWARF 2 CFA column which tracks the return address.  */
#define DWARF_FRAME_RETURN_COLUMN (FP_REG_LAST + 1)

/* Before the prologue, RA lives in r31.  */
#define INCOMING_RETURN_ADDR_RTX  gen_rtx (REG, VOIDmode, GP_REG_FIRST + 31)

/* Overrides for the COFF debug format.  */
#define PUT_SDB_SCL(a)					\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t.scl\t%d;", (a));	\
} while (0)

#define PUT_SDB_INT_VAL(a)				\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t.val\t%d;", (a));	\
} while (0)

#define PUT_SDB_VAL(a)					\
do {							\
  extern FILE *asm_out_text_file;			\
  fputs ("\t.val\t", asm_out_text_file);		\
  output_addr_const (asm_out_text_file, (a));		\
  fputc (';', asm_out_text_file);			\
} while (0)

#define PUT_SDB_DEF(a)					\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t%s.def\t",		\
	   (TARGET_GAS) ? "" : "#");			\
  ASM_OUTPUT_LABELREF (asm_out_text_file, a); 		\
  fputc (';', asm_out_text_file);			\
} while (0)

#define PUT_SDB_PLAIN_DEF(a)				\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t%s.def\t.%s;",		\
	   (TARGET_GAS) ? "" : "#", (a));		\
} while (0)

#define PUT_SDB_ENDEF					\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t.endef\n");		\
} while (0)

#define PUT_SDB_TYPE(a)					\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t.type\t0x%x;", (a));	\
} while (0)

#define PUT_SDB_SIZE(a)					\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t.size\t%d;", (a));	\
} while (0)

#define PUT_SDB_DIM(a)					\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t.dim\t%d;", (a));	\
} while (0)

#ifndef PUT_SDB_START_DIM
#define PUT_SDB_START_DIM				\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t.dim\t");		\
} while (0)
#endif

#ifndef PUT_SDB_NEXT_DIM
#define PUT_SDB_NEXT_DIM(a)				\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "%d,", a);		\
} while (0)
#endif

#ifndef PUT_SDB_LAST_DIM
#define PUT_SDB_LAST_DIM(a)				\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "%d;", a);		\
} while (0)
#endif

#define PUT_SDB_TAG(a)					\
do {							\
  extern FILE *asm_out_text_file;			\
  fprintf (asm_out_text_file, "\t.tag\t");		\
  ASM_OUTPUT_LABELREF (asm_out_text_file, a); 		\
  fputc (';', asm_out_text_file);			\
} while (0)

/* For block start and end, we create labels, so that
   later we can figure out where the correct offset is.
   The normal .ent/.end serve well enough for functions,