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Annotation of gcc/config/m68k/mot3300g.h, revision 1.1

1.1     ! root        1: /* Definitions of target machine Motorola Delta 68k using GAS
        !             2:    for GNU Compiler.
        !             3:    Copyright (C) 1994 Free Software Foundation, Inc.
        !             4: 
        !             5: This file is part of GNU CC.
        !             6: 
        !             7: GNU CC is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU General Public License as published by
        !             9: the Free Software Foundation; either version 2, or (at your option)
        !            10: any later version.
        !            11: 
        !            12: GNU CC is distributed in the hope that it will be useful,
        !            13: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            15: GNU General Public License for more details.
        !            16: 
        !            17: You should have received a copy of the GNU General Public License
        !            18: along with GNU CC; see the file COPYING.  If not, write to
        !            19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            20: 
        !            21: 
        !            22: /* Just in case someone asks */
        !            23: #define USE_GAS
        !            24: 
        !            25: #include "m68k/m68k.h"
        !            26: 
        !            27: /* See m68k.h.  7 means 68020 with 68881,
        !            28:    7 & 01400 means optimize for 68040 but allow execution on 68020. */
        !            29: #undef TARGET_DEFAULT
        !            30: #define        TARGET_DEFAULT (7 & 01400)
        !            31: 
        !            32: /* NYI: FP= is equivalent to -msoft-float
        !            33:    We use /lib/libp/lib* when profiling.
        !            34:    
        !            35:    NYI: if FP=M68881U library is -lc881u
        !            36:    NYI: if FP= library is -lc.
        !            37:    Default for us: FP=M68881 library is -lc881  */
        !            38: #undef LIB_SPEC
        !            39: #define LIB_SPEC "%{!shlib:%{p:-L/usr/lib/libp} %{pg:-L/usr/lib/libp} -lc881}"
        !            40: 
        !            41: #undef CPP_SPEC
        !            42: #define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
        !            43: 
        !            44: /* Shared libraries need to use crt0s.o  */
        !            45: #undef STARTFILE_SPEC
        !            46: #define STARTFILE_SPEC \
        !            47:   "%{!shlib:%{pg:mcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}\
        !            48:    %{shlib:crt0s.o%s shlib.ifile%s} "
        !            49: 
        !            50:   /* -m68000 requires special flags to the assembler.  */
        !            51: #define ASM_SPEC \
        !            52:  "%{m68000:-mc68000}%{mc68000:-mc68000}%{!mc68000:%{!m68000:-mc68020}}"
        !            53: 
        !            54: /* Generate calls to memcpy, memcmp and memset.  */
        !            55: #define TARGET_MEM_FUNCTIONS
        !            56: 
        !            57: /* size_t is unsigned int.  */
        !            58: #define SIZE_TYPE "unsigned int"
        !            59: 
        !            60: /* Every structure or union's size must be a multiple of 2 bytes.  */
        !            61: #define STRUCTURE_SIZE_BOUNDARY 16
        !            62: 
        !            63: /* man cpp on the Delta says pcc predefines "m68k", "unix", and "sysV68",
        !            64:    and experimentation validates this.   -jla */
        !            65: #define CPP_PREDEFINES "-Dm68k -Dunix -DsysV68"
        !            66: 
        !            67: /* cpp has to support a #sccs directive for the /usr/include files */
        !            68: #define SCCS_DIRECTIVE
        !            69: 
        !            70: /* Make sure to use MIT syntax, not Motorola */
        !            71: #undef MOTOROLA
        !            72: 
        !            73: /* Use SDB style because gdb on the delta doesn't understand stabs. */
        !            74: #define SDB_DEBUGGING_INFO
        !            75: 
        !            76: /* Use a register prefix to avoid clashes with external symbols (classic
        !            77:    example: `extern char PC;' in termcap).  */
        !            78: #undef REGISTER_PREFIX
        !            79: #define REGISTER_PREFIX "%"
        !            80: 
        !            81: /* In the machine description we can't use %R, because it will not be seen
        !            82:    by ASM_FPRINTF.  (Isn't that a design bug?).  */
        !            83: #undef REGISTER_PREFIX_MD
        !            84: #define REGISTER_PREFIX_MD "%%"
        !            85: 
        !            86: /* The file command should always begin the output.  */
        !            87: #undef ASM_FILE_START
        !            88: #define ASM_FILE_START(FILE) \
        !            89:     { \
        !            90:        fprintf (FILE, "%s", ASM_APP_OFF); \
        !            91:        output_file_directive ((FILE), main_input_filename); \
        !            92:     }
        !            93: 
        !            94: /* Undefining these will allow `output_file_directive' (in toplev.c)
        !            95:    to default to the right thing. */
        !            96: #undef ASM_OUTPUT_SOURCE_FILENAME
        !            97: #undef ASM_OUTPUT_MAIN_SOURCE_FILENAME
        !            98: 
        !            99: #undef REGISTER_NAMES
        !           100: #define REGISTER_NAMES \
        !           101: {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
        !           102:  "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp", \
        !           103:  "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7" }
        !           104: 
        !           105: /* Define how to jump to variable address from dispatch table of
        !           106:    relative addresses, for m68k.md insn.  Note the use of 2 '%'
        !           107:    chars to output one. */
        !           108: #define ASM_RETURN_CASE_JUMP return "jmp %%pc@(2,%0:w)"

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