gcc/config/m68k/altos3068.h

   1 /* Definitions of target machine for GNU compiler.  Altos 3068 68020 version.
   2    Copyright (C) 1988, 1989, 1993, 1996 Free Software Foundation, Inc.
   3    Contributed by Jyrki Kuoppala <jkp@cs.hut.fi>
   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, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22
  23 #include "m68k/m68k.h"
  24
  25 /* See m68k.h.  7 means 68020 with 68881.  */
  26 /* 5 is without 68881.  Change to 7 if you have 68881 */
  27
  28 #ifndef TARGET_DEFAULT
  29 #define TARGET_DEFAULT (MASK_BITFIELD|MASK_68020)
  30
  31 /* Don't try using XFmode.  */
  32 #undef LONG_DOUBLE_TYPE_SIZE
  33 #define LONG_DOUBLE_TYPE_SIZE 64
  34 #endif
  35
  36 /* Define __HAVE_68881__ in preprocessor,
  37    according to the -m flags.
  38    This will control the use of inline 68881 insns in certain macros.
  39    Also inform the program which CPU this is for.  */
  40
  41 #if TARGET_DEFAULT & MASK_68881
  42
  43 /* -m68881 is the default */
  44 #define CPP_SPEC \
  45 "%{!msoft-float:-D__HAVE_68881__ }\
  46 %{!ansi:%{m68000:-Dmc68010}%{mc68000:-Dmc68010}%{!mc68000:%{!m68000:-Dmc68020}}}"
  47
  48 #else
  49
  50 /* -msoft-float is the default */
  51 #define CPP_SPEC \
  52 "%{m68881:-D__HAVE_68881__ }\
  53 %{!ansi:%{m68000:-Dmc68010}%{mc68000:-Dmc68010}%{!mc68000:%{!m68000:-Dmc68020}}}"
  54
  55 #endif
  56
  57 /* -m68000 requires special flags to the assembler.  */
  58
  59 #define ASM_SPEC \
  60  "%{m68000:-mc68010}%{mc68000:-mc68010}%{!mc68000:%{!m68000:-mc68020}}"
  61
  62 /* Names to predefine in the preprocessor for this target machine.  */
  63
  64 #define CPP_PREDEFINES "-Dmc68000 -DPORTAR -Dmc68k32 -Uvax -Dm68k -Dunix -Asystem(unix)  -Acpu(m68k) -Amachine(m68k)"
  65
  66 /* Every structure or union's size must be a multiple of 2 bytes.  */
  67
  68 #define STRUCTURE_SIZE_BOUNDARY 16
  69
  70 /* Generate calls to memcpy, memcmp and memset.  */
  71 #define TARGET_MEM_FUNCTIONS
  72
  73 /* We use gnu assembler, linker and gdb, so we want DBX format.  */
  74
  75 #define DBX_DEBUGGING_INFO
  76
  77 /* Tell some conditionals we will use GAS.  Is this really used?  */
  78
  79 #define USE_GAS
  80
  81 /* This is how to output an assembler line defining a `double' constant.  */
  82
  83 #undef ASM_OUTPUT_DOUBLE
  84 #define ASM_OUTPUT_DOUBLE(FILE,VALUE)                   \
  85   do { char dstr[30];                                   \
  86        REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", dstr);    \
  87        fprintf (FILE, "\t.double 0r%s\n", dstr);        \
  88      } while (0)
  89
  90 /* This is how to output an assembler line defining a `float' constant.  */
  91
  92 #undef ASM_OUTPUT_FLOAT
  93 #define ASM_OUTPUT_FLOAT(FILE,VALUE)                    \
  94   do { char dstr[30];                                   \
  95        REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", dstr);    \
  96        fprintf (FILE, "\t.single 0r%s\n", dstr);        \
  97      } while (0)
  98
  99 #undef ASM_OUTPUT_FLOAT_OPERAND
 100 #define ASM_OUTPUT_FLOAT_OPERAND(CODE,FILE,VALUE)               \
 101  do {                                                           \
 102       if (CODE == 'f')                                          \
 103         {                                                       \
 104           char dstr[30];                                        \
 105           REAL_VALUE_TO_DECIMAL (VALUE, "%.9g", dstr);          \
 106           fprintf (FILE, "#0r%s", dstr);                        \
 107         }                                                       \
 108       else                                                      \
 109         {                                                       \
 110           long l;                                               \
 111           REAL_VALUE_TO_TARGET_SINGLE (VALUE, l);               \
 112           if (sizeof (int) == sizeof (long))                    \
 113             asm_fprintf ((FILE), "%I0x%x", l);                  \
 114           else                                                  \
 115             asm_fprintf ((FILE), "%I0x%lx", l);                 \
 116         }                                                       \
 117      } while (0)
 118
 119 #undef ASM_OUTPUT_DOUBLE_OPERAND
 120 #define ASM_OUTPUT_DOUBLE_OPERAND(FILE,VALUE)           \
 121   do { char dstr[30];                                   \
 122        REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr);    \
 123        fprintf (FILE, "#0r%s", dstr);                   \
 124      } while (0)
 125
 126 /* Return pointer values in both d0 and a0.  */
 127
 128 #undef FUNCTION_EXTRA_EPILOGUE
 129 #define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE)                             \
 130 {                                                                       \
 131   if (current_function_returns_pointer                                  \
 132       && ! find_equiv_reg (0, get_last_insn (), 0, 0, 0, 8, Pmode))     \
 133     fprintf (FILE, "\tmovel d0,a0\n");                                  \
 134 }