gcc/config/m68k/apollo68.h

   1 /* Definitions of target machine for GNU compiler.  Apollo 680X0 version.
   2    Copyright (C) 1989, 1992, 1996, 1997, 1999 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #include "m68k/m68k.h"
  22
  23 /* This symbol may be tested in other files for special Apollo handling */
  24
  25 #define TM_APOLLO
  26
  27 /* See m68k.h.  7 means 68020 with 68881.  */
  28
  29 #ifndef TARGET_DEFAULT
  30 #define TARGET_DEFAULT (MASK_BITFIELD|MASK_68881|MASK_68020)
  31 #endif
  32
  33 /* Target switches for the Apollo is the same as in m68k.h, except
  34    there is no Sun FPA. */
  35
  36 #undef TARGET_SWITCHES
  37 #define TARGET_SWITCHES  \
  38   { { "68020", 5},                              \
  39     { "c68020", 5},                             \
  40     { "68881", 2},                              \
  41     { "bitfield", 4},                           \
  42     { "68000", -5},                             \
  43     { "c68000", -5},                            \
  44     { "soft-float", -0102},                     \
  45     { "nobitfield", -4},                        \
  46     { "rtd", 8},                                \
  47     { "nortd", -8},                             \
  48     { "short", 040},                            \
  49     { "noshort", -040},                         \
  50     { "", TARGET_DEFAULT}}
  51
  52 /* Define __HAVE_68881__ in preprocessor,
  53    according to the -m flags.
  54    This will control the use of inline 68881 insns in certain macros.
  55    Also inform the program which CPU this is for.  */
  56
  57 #if TARGET_DEFAULT & MASK_68881
  58
  59 /* -m68881 is the default */
  60 #define CPP_SPEC \
  61 "%{!msoft-float:%{mfpa:-D__HAVE_FPA__ }%{!mfpa:-D__HAVE_68881__ }}\
  62 %{!ansi:%{m68000:-Dmc68010 }%{mc68000:-Dmc68010 }%{!mc68000:%{!m68000:-Dmc68020 }}\
  63 %{!ansi:-D_APOLLO_SOURCE}}"
  64
  65 #else
  66
  67 /* -msoft-float is the default */
  68 #define CPP_SPEC \
  69 "%{m68881:-D__HAVE_68881__ }%{mfpa:-D__HAVE_FPA__ }\
  70 %{!ansi:%{m68000:-Dmc68010 }%{mc68000:-Dmc68010 }%{!mc68000:%{!m68000:-Dmc68020 }}\
  71 %{!ansi:-D_APOLLO_SOURCE}}"
  72
  73 #endif
  74
  75 /* Names to predefine in the preprocessor for this target machine.  */
  76 /* These are the ones defined by Apollo, plus mc68000 for uniformity with
  77    GCC on other 68000 systems.  */
  78
  79 #define CPP_PREDEFINES "-Dapollo -Daegis -Dunix -Asystem(unix)  -Acpu(m68k) -Amachine(m68k)"
  80
  81 /* cpp has to support a #sccs directive for the /usr/include files */
  82
  83 #define SCCS_DIRECTIVE
  84
  85 /* Allow #ident but output nothing for it.  */
  86
  87 #define IDENT_DIRECTIVE
  88 #define ASM_OUTPUT_IDENT(FILE, NAME)
  89
  90 /* -m68000 requires special flags to the assembler.  */
  91
  92 #define ASM_SPEC \
  93  "%{m68000:-mc68010}%{mc68000:-mc68010}%{!mc68000:%{!m68000:-mc68020}}"
  94
  95 /* STARTFILE_SPEC
  96    Note that includes knowledge of the default specs for gcc, ie. no
  97    args translates to the same effect as -m68881 */
  98
  99 #if TARGET_DEFAULT & MASK_68881
 100 /* -m68881 is the default */
 101 #define STARTFILE_SPEC                                  \
 102   "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}"
 103 #else
 104 /* -msoft-float is the default */
 105 #define STARTFILE_SPEC                                  \
 106   "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}"
 107 #endif
 108
 109 /* Specify library to handle `-a' basic block profiling.  */
 110
 111 #define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} \
 112 %{a:/usr/lib/bb_link.o} "
 113
 114 /* Debugging is not supported yet */
 115
 116 #undef DBX_DEBUGGING_INFO
 117 #undef SDB_DEBUGGING_INFO
 118
 119 /* troy@cbme.unsw.edu.au says people are still using sr10.2
 120    and it does not support atexit.  */
 121 #define NEED_ATEXIT
 122
 123 /* Every structure or union's size must be a multiple of 2 bytes.  */
 124
 125 #define STRUCTURE_SIZE_BOUNDARY 16
 126
 127 /* Boundary (in *bits*) on which stack pointer should be aligned.  */
 128 #undef STACK_BOUNDARY
 129 #define STACK_BOUNDARY 32
 130
 131 /* Functions which return large structures get the address
 132    to place the wanted value from a hidden parameter.  */
 133
 134 #undef  PCC_STATIC_STRUCT_RETURN
 135 #undef  STRUCT_VALUE_REGNUM
 136 #define STRUCT_VALUE 0
 137 #define STRUCT_VALUE_INCOMING 0
 138
 139 /* Specify how to pad function arguments.
 140    Arguments are not padded at all; the stack is kept aligned on long
 141    boundaries. */
 142
 143 #define FUNCTION_ARG_PADDING(mode, size) none
 144
 145 /* The definition of this macro imposes a limit on the size of
 146    an aggregate object which can be treated as if it were a scalar
 147    object.  */
 148
 149 #define MAX_FIXED_MODE_SIZE    BITS_PER_WORD
 150
 151 /* The definition of this macro implies that there are cases where
 152    a scalar value cannot be returned in registers.
 153    For Apollo, anything larger than one integer register is returned
 154    using the structure-value mechanism, i.e. objects of DFmode are
 155    returned that way. */
 156
 157 #define RETURN_IN_MEMORY(type) \
 158   (TYPE_MODE (type) == BLKmode \
 159    || GET_MODE_SIZE (TYPE_MODE (type)) > UNITS_PER_WORD)
 160
 161 /* In order to link with Apollo libraries, we can't prefix external
 162    symbols with an underscore.  */
 163
 164 #undef  USER_LABEL_PREFIX
 165
 166 /* Use a prefix for local labels, just to be on the save side.  */
 167
 168 #undef LOCAL_LABEL_PREFIX
 169 #define LOCAL_LABEL_PREFIX "."
 170
 171 /* Use a register prefix to avoid clashes with external symbols (classic
 172    example: `extern char PC;' in termcap).  */
 173
 174 #undef REGISTER_PREFIX
 175 #define REGISTER_PREFIX "%"
 176
 177 /* config/m68k.md has an explicit reference to the program counter,
 178    prefix this by the register prefix.  */
 179
 180 #define ASM_RETURN_CASE_JUMP                    \
 181   do {                                          \
 182     if (TARGET_5200)                            \
 183       return "ext%.l %0\n\tjmp %%pc@(2,%0:l)";  \
 184     else                                        \
 185       return "jmp %%pc@(2,%0:w)"                \
 186   } while (0)
 187
 188 /* Here are the new register names.  */
 189
 190 #undef REGISTER_NAMES
 191 #ifndef SUPPORT_SUN_FPA
 192 #define REGISTER_NAMES \
 193 {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",        \
 194  "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp",        \
 195  "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7" }
 196 #else /* SUPPORTED_SUN_FPA */
 197 #define REGISTER_NAMES \
 198 {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",        \
 199  "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp",        \
 200  "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7", \
 201  "%fpa0", "%fpa1", "%fpa2", "%fpa3", "%fpa4", "%fpa5", "%fpa6", "%fpa7", \
 202  "%fpa8", "%fpa9", "%fpa10", "%fpa11", "%fpa12", "%fpa13", "%fpa14", "%fpa15", \
 203  "%fpa16", "%fpa17", "%fpa18", "%fpa19", "%fpa20", "%fpa21", "%fpa22", "%fpa23", \
 204  "%fpa24", "%fpa25", "%fpa26", "%fpa27", "%fpa28", "%fpa29", "%fpa30", "%fpa31" }
 205 #endif /* defined SUPPORT_SUN_FPA */