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Annotation of gcc/config/m68k/mot3300g.h, revision 1.1.1.2

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
1.1.1.2 ! root       19: the Free Software Foundation, 59 Temple Place - Suite 330,
        !            20: Boston, MA 02111-1307, USA.  */
1.1       root       21: 
                     22: 
                     23: /* Just in case someone asks */
                     24: #define USE_GAS
                     25: 
                     26: #include "m68k/m68k.h"
                     27: 
                     28: /* See m68k.h.  7 means 68020 with 68881,
                     29:    7 & 01400 means optimize for 68040 but allow execution on 68020. */
                     30: #undef TARGET_DEFAULT
                     31: #define        TARGET_DEFAULT (7 & 01400)
                     32: 
                     33: /* NYI: FP= is equivalent to -msoft-float
                     34:    We use /lib/libp/lib* when profiling.
                     35:    
                     36:    NYI: if FP=M68881U library is -lc881u
                     37:    NYI: if FP= library is -lc.
                     38:    Default for us: FP=M68881 library is -lc881  */
                     39: #undef LIB_SPEC
                     40: #define LIB_SPEC "%{!shlib:%{p:-L/usr/lib/libp} %{pg:-L/usr/lib/libp} -lc881}"
                     41: 
                     42: #undef CPP_SPEC
                     43: #define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
                     44: 
                     45: /* Shared libraries need to use crt0s.o  */
                     46: #undef STARTFILE_SPEC
                     47: #define STARTFILE_SPEC \
                     48:   "%{!shlib:%{pg:mcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}\
                     49:    %{shlib:crt0s.o%s shlib.ifile%s} "
                     50: 
                     51:   /* -m68000 requires special flags to the assembler.  */
                     52: #define ASM_SPEC \
                     53:  "%{m68000:-mc68000}%{mc68000:-mc68000}%{!mc68000:%{!m68000:-mc68020}}"
                     54: 
                     55: /* Generate calls to memcpy, memcmp and memset.  */
                     56: #define TARGET_MEM_FUNCTIONS
                     57: 
                     58: /* size_t is unsigned int.  */
                     59: #define SIZE_TYPE "unsigned int"
                     60: 
                     61: /* Every structure or union's size must be a multiple of 2 bytes.  */
                     62: #define STRUCTURE_SIZE_BOUNDARY 16
                     63: 
                     64: /* man cpp on the Delta says pcc predefines "m68k", "unix", and "sysV68",
                     65:    and experimentation validates this.   -jla */
                     66: #define CPP_PREDEFINES "-Dm68k -Dunix -DsysV68"
                     67: 
                     68: /* cpp has to support a #sccs directive for the /usr/include files */
                     69: #define SCCS_DIRECTIVE
                     70: 
                     71: /* Make sure to use MIT syntax, not Motorola */
                     72: #undef MOTOROLA
                     73: 
                     74: /* Use SDB style because gdb on the delta doesn't understand stabs. */
                     75: #define SDB_DEBUGGING_INFO
                     76: 
                     77: /* Use a register prefix to avoid clashes with external symbols (classic
                     78:    example: `extern char PC;' in termcap).  */
                     79: #undef REGISTER_PREFIX
                     80: #define REGISTER_PREFIX "%"
                     81: 
                     82: /* In the machine description we can't use %R, because it will not be seen
                     83:    by ASM_FPRINTF.  (Isn't that a design bug?).  */
                     84: #undef REGISTER_PREFIX_MD
                     85: #define REGISTER_PREFIX_MD "%%"
                     86: 
                     87: /* The file command should always begin the output.  */
                     88: #undef ASM_FILE_START
                     89: #define ASM_FILE_START(FILE) \
                     90:     { \
                     91:        fprintf (FILE, "%s", ASM_APP_OFF); \
                     92:        output_file_directive ((FILE), main_input_filename); \
                     93:     }
                     94: 
                     95: /* Undefining these will allow `output_file_directive' (in toplev.c)
                     96:    to default to the right thing. */
                     97: #undef ASM_OUTPUT_SOURCE_FILENAME
                     98: #undef ASM_OUTPUT_MAIN_SOURCE_FILENAME
                     99: 
                    100: #undef REGISTER_NAMES
                    101: #define REGISTER_NAMES \
                    102: {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
                    103:  "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp", \
                    104:  "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7" }
                    105: 
                    106: /* Define how to jump to variable address from dispatch table of
                    107:    relative addresses, for m68k.md insn.  Note the use of 2 '%'
                    108:    chars to output one. */
                    109: #define ASM_RETURN_CASE_JUMP return "jmp %%pc@(2,%0:w)"

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