mips.h

gcc-2.95.3 Linux下最常用的C编译器

#define CONDITIONAL_REGISTER_USAGE					\
do									\
  {									\
    if (!TARGET_HARD_FLOAT)						\
      {									\
	int regno;							\
									\
	for (regno = FP_REG_FIRST; regno <= FP_REG_LAST; regno++)	\
	  fixed_regs[regno] = call_used_regs[regno] = 1;		\
	for (regno = ST_REG_FIRST; regno <= ST_REG_LAST; regno++)	\
	  fixed_regs[regno] = call_used_regs[regno] = 1;		\
      }									\
    else if (mips_isa < 4)						\
      {									\
	int regno;							\
									\
	/* We only have a single condition code register.  We		\
           implement this by hiding all the condition code registers,	\
           and generating RTL that refers directly to ST_REG_FIRST.  */	\
	for (regno = ST_REG_FIRST; regno <= ST_REG_LAST; regno++)	\
	  fixed_regs[regno] = call_used_regs[regno] = 1;		\
      }									\
    /* In mips16 mode, we permit the $t temporary registers to be used	\
       for reload.  We prohibit the unused $s registers, since they	\
       are caller saved, and saving them via a mips16 register would	\
       probably waste more time than just reloading the value.  */	\
    if (TARGET_MIPS16)							\
      {									\
	fixed_regs[18] = call_used_regs[18] = 1;                        \
	fixed_regs[19] = call_used_regs[19] = 1;                        \
	fixed_regs[20] = call_used_regs[20] = 1;                        \
	fixed_regs[21] = call_used_regs[21] = 1;                        \
	fixed_regs[22] = call_used_regs[22] = 1;                        \
	fixed_regs[23] = call_used_regs[23] = 1;                        \
	fixed_regs[26] = call_used_regs[26] = 1;                        \
	fixed_regs[27] = call_used_regs[27] = 1;                        \
	fixed_regs[30] = call_used_regs[30] = 1;                        \
      }									\
    SUBTARGET_CONDITIONAL_REGISTER_USAGE				\
  }									\
while (0)

/* This is meant to be redefined in the host dependent files.  */
#define SUBTARGET_CONDITIONAL_REGISTER_USAGE

/* Show we can debug even without a frame pointer.  */
#define CAN_DEBUG_WITHOUT_FP

/* Complain about missing specs and predefines that should be defined in each
   of the target tm files to override the defaults.  This is mostly a place-
   holder until I can get each of the files updated [mm].  */

#if defined(OSF_OS) \
    || defined(DECSTATION) \
    || defined(SGI_TARGET) \
    || defined(MIPS_NEWS) \
    || defined(MIPS_SYSV) \
    || defined(MIPS_SVR4) \
    || defined(MIPS_BSD43)

#ifndef CPP_PREDEFINES
	#error "Define CPP_PREDEFINES in the appropriate tm.h file"
#endif

#ifndef LIB_SPEC
	#error "Define LIB_SPEC in the appropriate tm.h file"
#endif

#ifndef STARTFILE_SPEC
	#error "Define STARTFILE_SPEC in the appropriate tm.h file"
#endif

#ifndef MACHINE_TYPE
	#error "Define MACHINE_TYPE in the appropriate tm.h file"
#endif
#endif

/* Tell collect what flags to pass to nm.  */
#ifndef NM_FLAGS
#define NM_FLAGS "-Bn"
#endif


/* Names to predefine in the preprocessor for this target machine.  */

#ifndef CPP_PREDEFINES
#define CPP_PREDEFINES "-Dmips -Dunix -Dhost_mips -DMIPSEB -DR3000 -DSYSTYPE_BSD43 \
-D_mips -D_unix -D_host_mips -D_MIPSEB -D_R3000 -D_SYSTYPE_BSD43 \
-Asystem(unix) -Asystem(bsd) -Acpu(mips) -Amachine(mips)"
#endif

/* Assembler specs.  */

/* MIPS_AS_ASM_SPEC is passed when using the MIPS assembler rather
   than gas.  */

#define MIPS_AS_ASM_SPEC "\
%{!.s:-nocpp} %{.s: %{cpp} %{nocpp}} \
%{pipe: %e-pipe is not supported.} \
%{K} %(subtarget_mips_as_asm_spec)"

/* SUBTARGET_MIPS_AS_ASM_SPEC is passed when using the MIPS assembler
   rather than gas.  It may be overridden by subtargets.  */

#ifndef SUBTARGET_MIPS_AS_ASM_SPEC
#define SUBTARGET_MIPS_AS_ASM_SPEC "%{v}"
#endif

/* GAS_ASM_SPEC is passed when using gas, rather than the MIPS
   assembler.  */

#define GAS_ASM_SPEC "%{mcpu=*} %{m4650} %{mmad:-m4650} %{m3900} %{v}"

/* TARGET_ASM_SPEC is used to select either MIPS_AS_ASM_SPEC or
   GAS_ASM_SPEC as the default, depending upon the value of
   TARGET_DEFAULT.  */

#if ((TARGET_CPU_DEFAULT | TARGET_DEFAULT) & MASK_GAS) != 0
/* GAS */

#define TARGET_ASM_SPEC "\
%{mmips-as: %(mips_as_asm_spec)} \
%{!mmips-as: %(gas_asm_spec)}"

#else /* not GAS */

#define TARGET_ASM_SPEC "\
%{!mgas: %(mips_as_asm_spec)} \
%{mgas: %(gas_asm_spec)}"

#endif /* not GAS */

/* SUBTARGET_ASM_OPTIMIZING_SPEC handles passing optimization options
   to the assembler.  It may be overridden by subtargets.  */
#ifndef SUBTARGET_ASM_OPTIMIZING_SPEC
#define SUBTARGET_ASM_OPTIMIZING_SPEC "\
%{noasmopt:-O0} \
%{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}}"
#endif

/* SUBTARGET_ASM_DEBUGGING_SPEC handles passing debugging options to
   the assembler.  It may be overridden by subtargets.  */
#ifndef SUBTARGET_ASM_DEBUGGING_SPEC
#define SUBTARGET_ASM_DEBUGGING_SPEC "\
%{g} %{g0} %{g1} %{g2} %{g3} \
%{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \
%{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \
%{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \
%{gcoff:-g} %{gcoff0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3}"
#endif

/* SUBTARGET_ASM_SPEC is always passed to the assembler.  It may be
   overridden by subtargets.  */

#ifndef SUBTARGET_ASM_SPEC
#define SUBTARGET_ASM_SPEC ""
#endif

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

#define ASM_SPEC "\
%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
%{mips16:%{!mno-mips16:-mips16}} %{mno-mips16:-no-mips16} \
%(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}} \
%{mint64|mlong64|mlong32:-mexplicit-type-size }\
%{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:%{!mips1:%{!mips2:-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 "%{!mlong32:-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} \
%{mips16:%{!mno-mips16:-D__mips16}} \
%{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