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- /* Definitions of target machine for GNU compiler. Amiga 68000/68020 version.
- Copyright (C) 1987, 1988 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. */
-
- #include "tm-m68k.h"
-
- /* See tm-m68k.h. 7 means 68020 with 68881. */
-
- #ifndef TARGET_DEFAULT
- #define TARGET_DEFAULT 0
- #endif
-
- /* Define __HAVE_FPA__ or __HAVE_68881__ in preprocessor,
- according to the -m flags.
- This will control the use of inline 68881 insns in certain macros.
- Also inform the program which CPU this is for. */
-
- #if TARGET_DEFAULT & 02
-
- /* -m68881 is the default */
- #define CPP_SPEC \
- "%{!msoft-float:-D__HAVE_68881__ }\
- %{!ansi:%{m68000:-Dmc68010}%{mc68000:-Dmc68010}%{!mc68000:%{!m68000:-Dmc68020}}}"
-
- #else
- /* -msoft-float is the default, assume -mc68000 as well */
- #define CPP_SPEC \
- "%{m68881:-D__HAVE_68881__ }\
- %{!ansi:%{m68020:-Dmc68020}%{mc68020:-Dmc68020}%{!mc68020:%{!m68020:-Dmc68010}}}"
-
- #endif
-
- /* These compiler options take an argument. We ignore -target for now. */
-
- /* #define WORD_SWITCH_TAKES_ARG(STR) (!strcmp (STR, "target")) */
-
- /* -m68000 requires special flags to the assembler. */
-
- #if TARGET_DEFAULT & 01
-
- #define ASM_SPEC \
- "%{m68000:-mc68010}%{mc68000:-mc68010}%{!mc68000:%{!m68000:-mc68020}}"
-
- #else
-
- #define ASM_SPEC \
- "%{m68020:-mc68020}%{mc68020:-mc68020}%{!mc68020:%{!m68020:-mc68010}}"
-
- #endif
-
- /* Names to predefine in the preprocessor for this target machine. */
-
- /* amiga/amigados are the new "standard" defines for the Amiga, MCH_AMIGA
- * was used before and is included for compatibility reasons */
-
- #define CPP_PREDEFINES "-Dmc68000 -Damiga -Damigados -DMCH_AMIGA -DAMIGA"
-
- /* STARTFILE_SPEC to include sun floating point initialization
- This is necessary (tr: Sun does it) for both the m68881 and the fpa
- routines.
- Note that includes knowledge of the default specs for gcc, ie. no
- args translates to the same effect as -m68881
- I'm not sure what would happen below if people gave contradictory
- arguments (eg. -msoft-float -mfpa) */
-
- #define STARTFILE_SPEC \
- "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}"
-
- /* Specify library to handle `-a' basic block profiling.
- Control choice of libm.a (if user says -lm)
- based on fp arith default and options. */
-
- /* for now, no different math libraries exist, there probably *will*
- * be some in the future. */
- #define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}"
-
- /* if debugging, tell the linker to output amiga-hunk symbols *and*
- * a BSD compatible debug hunk */
-
- #define LINK_SPEC "%{g:-amiga-debug-hunk} "
-
- /* Every structure or union's size must be a multiple of 2 bytes. */
-
- #define STRUCTURE_SIZE_BOUNDARY 16
-
- /* This is BSD, so it wants DBX format. */
-
- #define DBX_DEBUGGING_INFO
-
- /* This is how to output an assembler line defining a `double' constant. */
-
- #undef ASM_OUTPUT_DOUBLE
- #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
- (isinf ((VALUE)) \
- ? fprintf (FILE, "\t.double 0r%s99e999\n", ((VALUE) > 0 ? "" : "-")) \
- : fprintf (FILE, "\t.double 0r%.20e\n", (VALUE)))
-
- /* This is how to output an assembler line defining a `float' constant. */
-
- #undef ASM_OUTPUT_FLOAT
- #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
- (isinf ((VALUE)) \
- ? fprintf (FILE, "\t.single 0r%s99e999\n", ((VALUE) > 0 ? "" : "-")) \
- : fprintf (FILE, "\t.single 0r%.20e\n", (VALUE)))
-
- #undef ASM_OUTPUT_FLOAT_OPERAND
- #define ASM_OUTPUT_FLOAT_OPERAND(FILE,VALUE) \
- (isinf ((VALUE)) \
- ? fprintf (FILE, "#0r%s99e999", ((VALUE) > 0 ? "" : "-")) \
- : fprintf (FILE, "#0r%.9g", (VALUE)))
-
- #undef ASM_OUTPUT_DOUBLE_OPERAND
- #define ASM_OUTPUT_DOUBLE_OPERAND(FILE,VALUE) \
- (isinf ((VALUE)) \
- ? fprintf (FILE, "#0r%s99e999", ((VALUE) > 0 ? "" : "-")) \
- : fprintf (FILE, "#0r%.20g", (VALUE)))
-
- /* use A5 as framepointer instead of A6, this makes A6 available as a
- * general purpose register, and can thus be used without problems in
- * direct library calls. */
- #undef FRAME_POINTER_REGNUM
- #define FRAME_POINTER_REGNUM 13
- #undef ARG_POINTER_REGNUM
- #define ARG_POINTER_REGNUM 13
-
-
- #define CC_INCLUDE_DIR "gcc:include"
-
-
- #undef FUNCTION_PROLOGUE
- #define FUNCTION_PROLOGUE(FILE, SIZE) \
- { register int regno; \
- register int mask = 0; \
- extern char call_used_regs[]; \
- int fsize = ((SIZE) + 3) & -4; \
- if (frame_pointer_needed) \
- { if (TARGET_68020 || fsize < 0x8000) \
- fprintf (FILE, "\tlink a5,#%d\n", -fsize); \
- else \
- fprintf (FILE, "\tlink a5,#0\n\tsubl #%d,sp\n", fsize); } \
- for (regno = 24; regno < 56; regno++) \
- if (regs_ever_live[regno] && ! call_used_regs[regno]) \
- fprintf(FILE, "\tfpmoved %s, sp@-\n", \
- reg_names[regno]); \
- for (regno = 16; regno < 24; regno++) \
- if (regs_ever_live[regno] && ! call_used_regs[regno]) \
- mask |= 1 << (regno - 16); \
- if ((mask & 0xff) != 0) \
- fprintf (FILE, "\tfmovem #0x%x,sp@-\n", mask & 0xff); \
- mask = 0; \
- for (regno = 0; regno < 16; regno++) \
- if (regs_ever_live[regno] && ! call_used_regs[regno]) \
- mask |= 1 << (15 - regno); \
- if (frame_pointer_needed) \
- mask &= ~ (1 << (15-FRAME_POINTER_REGNUM)); \
- if (exact_log2 (mask) >= 0) \
- fprintf (FILE, "\tmovel %s,sp@-\n", reg_names[15 - exact_log2 (mask)]); \
- else if (mask) fprintf (FILE, "\tmoveml #0x%x,sp@-\n", mask); }
-
-
- #undef FUNCTION_EPILOGUE
- #define FUNCTION_EPILOGUE(FILE, SIZE) \
- { register int regno; \
- register int mask, fmask; \
- register int nregs; \
- int offset, foffset, fpoffset; \
- extern char call_used_regs[]; \
- extern int current_function_pops_args; \
- extern int current_function_args_size; \
- int fsize = ((SIZE) + 3) & -4; \
- int big = 0; \
- FUNCTION_EXTRA_EPILOGUE (FILE, SIZE); \
- nregs = 0; fmask = 0; fpoffset = 0; \
- for (regno = 24 ; regno < 56 ; regno++) \
- if (regs_ever_live[regno] && ! call_used_regs[regno]) \
- nregs++; \
- fpoffset = nregs*8; \
- nregs = 0; \
- for (regno = 16; regno < 24; regno++) \
- if (regs_ever_live[regno] && ! call_used_regs[regno]) \
- { nregs++; fmask |= 1 << (23 - regno); } \
- foffset = fpoffset + nregs * 12; \
- nregs = 0; mask = 0; \
- if (frame_pointer_needed) regs_ever_live[FRAME_POINTER_REGNUM] = 0; \
- for (regno = 0; regno < 16; regno++) \
- if (regs_ever_live[regno] && ! call_used_regs[regno]) \
- { nregs++; mask |= 1 << regno; } \
- offset = foffset + nregs * 4; \
- if (offset + fsize >= 0x8000 \
- && frame_pointer_needed \
- && (mask || fmask || fpoffset)) \
- { fprintf (FILE, "\tmovel #%d,a0\n", -fsize); \
- fsize = 0, big = 1; } \
- if (exact_log2 (mask) >= 0) { \
- if (big) \
- fprintf (FILE, "\tmovel a5@(-%d,a0:l),%s\n", \
- offset + fsize, reg_names[exact_log2 (mask)]); \
- else if (! frame_pointer_needed) \
- fprintf (FILE, "\tmovel sp@+,%s\n", \
- reg_names[exact_log2 (mask)]); \
- else \
- fprintf (FILE, "\tmovel a5@(-%d),%s\n", \
- offset + fsize, reg_names[exact_log2 (mask)]); } \
- else if (mask) { \
- if (big) \
- fprintf (FILE, "\tmoveml a5@(-%d,a0:l),#0x%x\n", \
- offset + fsize, mask); \
- else if (! frame_pointer_needed) \
- fprintf (FILE, "\tmoveml sp@+,#0x%x\n", mask); \
- else \
- fprintf (FILE, "\tmoveml a5@(-%d),#0x%x\n", \
- offset + fsize, mask); } \
- if (fmask) { \
- if (big) \
- fprintf (FILE, "\tfmovem a5@(-%d,a0:l),#0x%x\n", \
- foffset + fsize, fmask); \
- else if (! frame_pointer_needed) \
- fprintf (FILE, "\tfmovem sp@+,#0x%x\n", fmask); \
- else \
- fprintf (FILE, "\tfmovem a5@(-%d),#0x%x\n", \
- foffset + fsize, fmask); } \
- if (fpoffset != 0) \
- for (regno = 55; regno >= 24; regno--) \
- if (regs_ever_live[regno] && ! call_used_regs[regno]) { \
- if (big) \
- fprintf(FILE, "\tfpmoved a5@(-%d,a0:l), %s\n", \
- fpoffset + fsize, reg_names[regno]); \
- else if (! frame_pointer_needed) \
- fprintf(FILE, "\tfpmoved sp@+, %s\n", \
- reg_names[regno]); \
- else \
- fprintf(FILE, "\tfpmoved a5@(-%d), %s\n", \
- fpoffset + fsize, reg_names[regno]); \
- fpoffset -= 8; \
- } \
- if (frame_pointer_needed) \
- fprintf (FILE, "\tunlk a5\n"); \
- if (current_function_pops_args && current_function_args_size) \
- fprintf (FILE, "\trtd #%d\n", current_function_args_size); \
- else fprintf (FILE, "\trts\n"); }
-
-