tm-mips.h

这是完整的gcc源代码

/* Definitions of target machine for GNU compiler.  MIPS version.
   Contributed by   A. Lichnewsky, [e-mail]
   Changes by	    Michael Meissner, [e-mail]
   Copyright (C) 1989, 1990 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.

GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* ??? This file needs to be reformatted so that it looks like the
   rest of GCC. ???  */

/*----------------------------------------------------------------------

SWITCHES:

    -O    optimization. Implies -mgpOPT
    -O1	  Same as -O, mips compatibility
    -O2   Implies -O -fomit-frame-pointer -fstrength-reduce
    -O3   Implies -O2 + -finline-functions

    -mG0 -mG1 -mG2
          Construct a size to be passed to GCC for Data / Sdata selection.

          Value is ( (i=G0 + 2 G1 + 4 G2) , (i < 6) ? ( 1<<i) :(1 <<(i+3)))
          Same value should be passed to as + ld using -G.  Use -G instead
	  since it is now supported.

	  Default = -mG1 -mG0 (Value = 8).

    -G32  Implies -G 32 -mG2 -mnG1 -mG0.


    -bestGnum
          Pass -bestGnum flag to ld. This helps setting best value for
          the -G parameter.

    -ZSYSV  for RISC-OS: use the System V environment
    -ZBSD43 for RISC-OS: use the BSD 4.3  environment
----------------------------------------------------------------------*/



/* Suppression of libg.a when debugging */
#define NO_LIBG


/* Switch  Recognition by gcc.c   */

#ifdef SWITCH_TAKES_ARG
#undef SWITCH_TAKES_ARG
#endif

#define SWITCH_TAKES_ARG(CHAR)      \
  ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o' \
   || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u' \
   || (CHAR) == 'I' || (CHAR) == 'Y' || (CHAR) == 'm' \
   || (CHAR) == 'L' || (CHAR) == 'i' || (CHAR) == 'A' \
   || (CHAR) == 'G')

/* Process -mGxx switches  */

extern void overide_options ();

#define OVERRIDE_OPTIONS overide_options ()


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

#ifndef CPP_PREDEFINES
#define CPP_PREDEFINES "-Dmips -Dunix -Dhost_mips -DMIPSEB -DR3000 -DLANGUAGE_C"
#endif

/* Extra switches sometimes passed to the assembler.  */

#ifndef ASM_SPEC
#ifndef OSF_OS			/* normal MIPS system */
#ifndef DECSTATION		/* big endian MIPS (MIPS, SGI) */
#ifndef SGI_TARGET		/* not Silicon Graphics (ie, MIPSco) */

#define ASM_SPEC	"%{!mrnames:-nocpp}				\
			 %{!mgas:					\
				%{pipe: %e-pipe is not supported.}	\
				%{EB} %{!EB:-EB}			\
				%{EL: %e-EL not supported}		\
				%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}	\
				%{g} %{g1} %{g2} %{g3} %{g0}}		\
			 %{G*}						\
			 %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{mgas:-G 0}			\
					%{!pic:%{!mpic:%{!mgas:-G 8}}}}	\
				%{G32: -G 32}}				\
			 %{v} %{K}"

#else				/* Silicon Graphics */
#define ASM_SPEC	"%{!mrnames:-nocpp}				\
			 %{!mgas:					\
				%{pipe: %e-pipe is not supported.}	\
				%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}	\
				%{g} %{g1} %{g2} %{g3} %{g0}}		\
			 %{G*}						\
			 %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{mgas:-G 0}			\
					%{!pic:%{!mpic:%{!mgas:-G 8}}}}	\
				%{G32: -G 32}}				\
			 %{v} %{K}"

#endif				/* Silicon Graphics */
#else				/* Ultrix Decstation (little endian) */
#define ASM_SPEC	"%{!mrnames:-nocpp}				\
			 %{!mgas:					\
				%{pipe:%e:-pipe not supported}		\
				%{EL} %{!EL:-EL}			\
				%{EB: %e-EB not supported}		\
				%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}	\
				%{g} %{g1} %{g2} %{g3} %{g0}}		\
			 %{G*}						\
			 %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{mgas:-G 0}			\
					%{!pic:%{!mpic:%{!mgas:-G 8}}}}	\
				%{G32: -G 32}}				\
			 %{v} %{K}"
#endif				/* DECstation running Ultrix */
#else				/* OSF/1 of some sort */
#ifndef DECSTATION
				/* Big endian MIPS running OSF/1 */
#define ASM_SPEC	"%{mmips-as:					\
				%{pipe:%e:-pipe not supported}		\
				%{EB} %{!EB:-EB}			\
				%{EL: %e-EL not supported}		\
				%{!mrnames:-nocpp}			\
				%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}	\
				%{g} %{g1} %{g2} %{g3} %{g0}		\
				%{v} %{K}}				\
			 %{G*}						\
			 %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{!mmips-as:-G 0}		\
					%{!pic:%{!mpic:%{mmips-as:-G 8}}}} \
				%{G32: -G 32}}"
#else
				/* Little endian OSF/1 Decstation */
#define ASM_SPEC	"%{mmips-as:					\
				%{pipe:%e:-pipe not supported}		\
				%{EL} %{!EL:-EL}			\
				%{EB: %e-EB not supported}		\
				%{!mrnames:-nocpp}			\
				%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}	\
				%{g} %{g1} %{g2} %{g3} %{g0}		\
				%{v} %{K}}				\
			 %{G*}						\
			 %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{!mmips-as:-G 0}		\
					%{!pic:%{!mpic:%{mmips-as:-G 8}}}} \
				%{G32: -G 32}}"

#endif				/* little endian OSF/1 DECstation */
#endif				/* OSF/1 */
#endif				/* ASM_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:%e-pg is not supported on the MIPS}%{p:-lprof1} -lc"
#endif

/* Inhibit use of -lg.  */
#define LIBG_SPEC ""

/* Extra switches sometimes passed to the loader.  */


#ifndef LINK_SPEC
#ifdef MIPS_SYSV		/* RISC-OS SYSTEM V */

#ifndef STARTFILE_SPEC
#define STARTFILE_SPEC						\
  "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt1.o%s crtn.o%s}}"
#endif

#define LINK_SPEC  "%{G*}						\
		    %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{mgas:-G 0}			\
					%{!pic:%{!mpic:%{!mgas:-G 8}}}}	\
			%{G32:-G 32}}					\
		    %{!G:%{!G32:					\
			%{mG0:%eYou should include ld/as option -G}	\
			%{mG1:%eYou should include ld/as option -G}	\
			%{mG2:%eYou should include ld/as option -G}}}	\
		    %{bestGnum}						\
		    %{!ZBSD43:-systype /sysv/}%{ZBSD43:-systype /bsd43/} \
		    %{EB} %{!EB:-EB} %{EL:%e-EL not supported}"

#else				/* RISC-OS SYSTEM V */
#ifdef MIPS_BSD43		/* RISC-OS BSD */

#ifndef STARTFILE_SPEC
#define STARTFILE_SPEC							\
  "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt1.o%s crtn.o%s}}"
#endif

#define LINK_SPEC  "%{G*}						\
		    %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{mgas:-G 0}			\
					%{!pic:%{!mpic:%{!mgas:-G 8}}}}	\
			%{G32:-G 32}}					\
		    %{!G:%{!G32:					\
			%{mG0:%eYou should include ld/as option -G}	\
			%{mG1:%eYou should include ld/as option -G}	\
			%{mG2:%eYou should include ld/as option -G}}}	\
		    %{bestGnum}						\
		    %{!ZSYSV:-systype /bsd43/}%{ZSYSV:-systype /sysv/}	\
		    %{EB} %{!EB:-EB} %{EL:%e-EL not supported}"

#else

#ifndef DECSTATION		/* Big endian BSD or OSF/1 system */
#ifndef OSF_OS			/* Big endian BSD system */
#ifndef SGI_TARGET		/* Big endian non Silicon Graphics system */

#define LINK_SPEC  "%{G*}						\
		    %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{mgas:-G 0}			\
					%{!pic:%{!mpic:%{!mgas:-G 8}}}}	\
			%{G32:-G 32}}					\
		    %{!G:%{!G32:					\
			%{mG0:%eYou should include ld/as option -G}	\
			%{mG1:%eYou should include ld/as option -G}	\
			%{mG2:%eYou should include ld/as option -G}}}	\
		    %{!mgas: %{EB} %{!EB:-EB} %{EL:%e-EL not supported}	\
			     %{bestGnum}}"

#else				/* Silicon graphics system */
#define LINK_SPEC  "%{G*}						\
		    %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{mgas:-G 0}			\
					%{!pic:%{!mpic:%{!mgas:-G 8}}}}	\
			%{G32:-G 32}}					\
		    %{!G:%{!G32:					\
			%{mG0:%eYou should include ld/as option -G}	\
			%{mG1:%eYou should include ld/as option -G}	\
			%{mG2:%eYou should include ld/as option -G}}}	\
		    %{!mgas: %{bestGnum}}"

#endif				/* Silicon Graphics system */
#else				/* Big endian OSF/1 system */
#define LINK_SPEC  "%{G*}						\
		    %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{!mmips-as:-G 0}		\
					%{!pic:%{!mpic:%{mmips-as:-G 8}}}} \
			%{G32:-G 32}}					\
		    %{!G:%{!G32:					\
			%{mG0:%eYou should include ld/as option -G}	\
			%{mG1:%eYou should include ld/as option -G}	\
			%{mG2:%eYou should include ld/as option -G}}}	\
		    %{mmips-as: %{EB} %{!EB:-EB} %{EL:%e-EL not supported} \
			%{bestGnum}}					\
		    %{nostdlib}"
#endif				/* Big endian BSD or OSF/1 system */

#else				/* Little endian Ultrix or OSF/1 */
#ifndef OSF_OS			/* Little endian Ultrix system */
#define LINK_SPEC  "%{G*}						\
		    %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{mgas:-G 0}			\
					%{!pic:%{!mpic:%{!mgas:-G 8}}}}	\
			%{G32:-G 32}}					\
		    %{!G:%{!G32:					\
			%{mG0:%eYou should include ld/as option -G}	\
			%{mG1:%eYou should include ld/as option -G}	\
			%{mG2:%eYou should include ld/as option -G}}}	\
		    %{!mgas: %{EL} %{!EL:-EL} %{EB:%e-EB not supported}	\
			     %{bestGnum}}"

#else				/* Little endian OSF/1 system */
#define LINK_SPEC  "%{G*}						\
		    %{!G:%{!G32:	%{mpic:-G 0} %{pic:-G 0}	\
					%{!mmips-as:-G 0}		\
					%{!pic:%{!mpic:%{mmips-as:-G 8}}}} \
			%{G32:-G 32}}					\
		    %{!G:%{!G32:					\
			%{mG0:%eYou should include ld/as option -G}	\
			%{mG1:%eYou should include ld/as option -G}	\
			%{mG2:%eYou should include ld/as option -G}}}	\
		    %{mmips-as: %{EL} %{!EL:-EL} %{EB:%e-EB not supported} \
			%{bestGnum}}					\
		    %{nostdlib}"

#endif				/* Little endian OSF/1 system */
#endif				/* Little endian BSD or OSF/1 system */
#endif				/* RISC-OS BSD */
#endif				/* RISC-OS SYSTEM V */
#endif				/* LINK_SPEC defined */

/* CC1 SPECS */

#define CC1_SPEC   "%{O: %{!mngpOPT:-mgpOPT}}				\
                    %{O1:-O %{!mngpOPT:-mgpOPT}}			\
		    %{O2:-O %{!fnostrength-reduce:-fstrength-reduce}	\
			    %{!fnoomit-frame-pointer:-fomit-frame-pointer} \
			    %{!mngpOPT:-mgpOPT}}			\
		    %{O3:-O %{!fnostrength-reduce:-fstrength-reduce}	\
			    %{!fnoomit-frame-pointer:-fomit-frame-pointer} \
			    %{!fnoinline-functions:-finline-functions}	\
			    %{!mngpOPT:-mgpOPT}}			\
                    %{O4:%eGCC does not support -O4}			\
		    %{!g: %{g1:-g} %{g2:-g} %{g3:-g}}			\
		    %{G32: -mG2 -mnG1 }"

/* CPP SPECS */

#ifndef DECSTATION

#ifdef SGI_TARGET		/* Silicon Graphics */
#define CPP_SPEC " %{!ansi:-D__EXTENSIONS__}				\
		   -D_MIPSEB -D_SYSTYPE_SYSV -D_LANGUAGE_C		\
		   %{O1:-D__OPTIMIZE__}					\
		   %{O2:-D__OPTIMIZE__}					\
		   %{O3:-D__OPTIMIZE__}"

#else
#if defined(MIPS_SYSV) || defined(MIPS_BSD43)
				/* MIPS RISC-OS environments */

#ifdef MIPS_SYSV
#define CPP_SPEC " %{!ansi:%{!ZBSD43:-DSYSTYPE_SYSV}%{ZBSD43:-DSYSTYPE_BSD43}}\
		   %{!ZBSD43:-D__SYSTYPE_SYSV__}%{ZBSD43:-D__SYSTYPE_BSD43__} \
		   %{O1:-D__OPTIMIZE__}					\
		   %{O2:-D__OPTIMIZE__}					\
		   %{O3:-D__OPTIMIZE__}"
#else /* not MIPS_SYSV */

/* Use this instead of a conditional -I in CPP_SPEC
   because -I adds the dir in the wrongplace in the search path.  */
#define CC_INCLUDE_DIR "/bsd43/usr/include"

#define CPP_SPEC " %{!ansi:%{!ZSYSV:-DSYSTYPE_BSD43}%{ZSYSV:-DSYSTYPE_SYSV}}\
		   %{!ZSYSV:-D__SYSTYPE_BSD43__}%{ZSYSV:-D__SYSTYPE_SYSV__}\
		   %{O1:-D__OPTIMIZE__}					\
		   %{O2:-D__OPTIMIZE__}					\
		   %{O3:-D__OPTIMIZE__}"

#endif /* not MIPS_SYSV */

#else /* not MIPS_SYSV and not MIPS_BSD43 */
				/* default MIPS Bsd environment */
#define CPP_SPEC "%{!ansi:-DSYSTYPE_BSD} -D__SYSTYPE_BSD__		\
		   %{O1:-D__OPTIMIZE__}					\
		   %{O2:-D__OPTIMIZE__}					\
		   %{O3:-D__OPTIMIZE__}"

#endif /* not MIPS_SYSV and not MIPS_BSD43 */
#endif /* not Silicon Graphics */

#else	/* DECSTATION */
#define CPP_SPEC  "%{O1:-D__OPTIMIZE__}					\
		   %{O2:-D__OPTIMIZE__}					\
		   %{O3:-D__OPTIMIZE__}"

#endif /* not DECSTATION */

/* Print subsidiary information on the compiler version in use.  */

#ifndef __DATE__
#define __DATE__ "[unknown date]"
#endif

#define MIPS_VERSION "AL-MIPS 1.1"

#ifdef DECSTATION
#ifdef OSF_OS
#define MACHINE_TYPE "OSF/1 Dec Mips"
#else
#define MACHINE_TYPE "Ultrix Dec Mips"
#endif

#else
#ifdef SGI_TARGET