contrib/gcc/config/mips/netbsd.h

   1 /* Definitions of target machine for GNU compiler, for MIPS NetBSD systems.
   2    Copyright (C) 1993, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, 2004
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC 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 GCC 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 GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22
  23 /* Define default target values.  */
  24
  25 #undef MACHINE_TYPE
  26 #if TARGET_ENDIAN_DEFAULT != 0
  27 #define MACHINE_TYPE "NetBSD/mipseb ELF"
  28 #else
  29 #define MACHINE_TYPE "NetBSD/mipsel ELF"
  30 #endif
  31
  32 #define TARGET_OS_CPP_BUILTINS()                        \
  33   do                                                    \
  34     {                                                   \
  35       NETBSD_OS_CPP_BUILTINS_ELF();                     \
  36       builtin_define ("__NO_LEADING_UNDERSCORES__");    \
  37       builtin_define ("__GP_SUPPORT__");                \
  38       if (TARGET_LONG64)                                \
  39         builtin_define ("__LONG64");                    \
  40                                                         \
  41       if (TARGET_ABICALLS)                              \
  42         builtin_define ("__ABICALLS__");                \
  43                                                         \
  44       if (mips_abi == ABI_EABI)                         \
  45         builtin_define ("__mips_eabi");                 \
  46       else if (mips_abi == ABI_N32)                     \
  47         builtin_define ("__mips_n32");                  \
  48       else if (mips_abi == ABI_64)                      \
  49         builtin_define ("__mips_n64");                  \
  50       else if (mips_abi == ABI_O64)                     \
  51         builtin_define ("__mips_o64");                  \
  52     }                                                   \
  53   while (0)
  54
  55 /* The generic MIPS TARGET_CPU_CPP_BUILTINS are incorrect for NetBSD.
  56    Specifically, they define too many namespace-invasive macros.  Override
  57    them here.  Note this is structured for easy comparison to the version
  58    in mips.h.
  59
  60    FIXME: This probably isn't the best solution.  But in the absence
  61    of something better, it will have to do, for now.  */
  62
  63 #undef TARGET_CPU_CPP_BUILTINS
  64 #define TARGET_CPU_CPP_BUILTINS()                               \
  65   do                                                            \
  66     {                                                           \
  67       builtin_assert ("cpu=mips");                              \
  68       builtin_define ("__mips__");                              \
  69       builtin_define ("_mips");                                 \
  70                                                                 \
  71       /* No _R3000 or _R4000.  */                               \
  72       if (TARGET_64BIT)                                         \
  73         builtin_define ("__mips64");                            \
  74                                                                 \
  75       if (TARGET_FLOAT64)                                       \
  76         builtin_define ("__mips_fpr=64");                       \
  77       else                                                      \
  78         builtin_define ("__mips_fpr=32");                       \
  79                                                                 \
  80       if (TARGET_MIPS16)                                        \
  81         builtin_define ("__mips16");                            \
  82                                                                 \
  83       MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info);    \
  84       MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info);    \
  85                                                                 \
  86       if (ISA_MIPS1)                                            \
  87         builtin_define ("__mips=1");                            \
  88       else if (ISA_MIPS2)                                       \
  89         builtin_define ("__mips=2");                            \
  90       else if (ISA_MIPS3)                                       \
  91         builtin_define ("__mips=3");                            \
  92       else if (ISA_MIPS4)                                       \
  93         builtin_define ("__mips=4");                            \
  94       else if (ISA_MIPS32)                                      \
  95         {                                                       \
  96           builtin_define ("__mips=32");                         \
  97           builtin_define ("__mips_isa_rev=1");                  \
  98         }                                                       \
  99       else if (ISA_MIPS32R2)                                    \
 100         {                                                       \
 101           builtin_define ("__mips=32");                         \
 102           builtin_define ("__mips_isa_rev=2");                  \
 103         }                                                       \
 104       else if (ISA_MIPS64)                                      \
 105         {                                                       \
 106           builtin_define ("__mips=64");                         \
 107           builtin_define ("__mips_isa_rev=1");                  \
 108         }                                                       \
 109                                                                 \
 110       if (TARGET_HARD_FLOAT)                                    \
 111         builtin_define ("__mips_hard_float");                   \
 112       else if (TARGET_SOFT_FLOAT)                               \
 113         builtin_define ("__mips_soft_float");                   \
 114                                                                 \
 115       if (TARGET_SINGLE_FLOAT)                                  \
 116         builtin_define ("__mips_single_float");                 \
 117                                                                 \
 118       if (TARGET_BIG_ENDIAN)                                    \
 119         builtin_define ("__MIPSEB__");                          \
 120       else                                                      \
 121         builtin_define ("__MIPSEL__");                          \
 122                                                                 \
 123       /* No language dialect defines.  */                       \
 124                                                                 \
 125       /* ABIs handled in TARGET_OS_CPP_BUILTINS.  */            \
 126     }                                                           \
 127   while (0)
 128
 129
 130 /* Clean up after the generic MIPS/ELF configuration.  */
 131 #undef MD_EXEC_PREFIX
 132 #undef MD_STARTFILE_PREFIX
 133
 134 /* Extra specs we need.  */
 135 #undef SUBTARGET_EXTRA_SPECS
 136 #define SUBTARGET_EXTRA_SPECS                                           \
 137   { "netbsd_cpp_spec",          NETBSD_CPP_SPEC },                      \
 138   { "netbsd_link_spec",         NETBSD_LINK_SPEC_ELF },                 \
 139   { "netbsd_entry_point",       NETBSD_ENTRY_POINT },
 140
 141 /* Provide a SUBTARGET_CPP_SPEC appropriate for NetBSD.  */
 142
 143 #undef SUBTARGET_CPP_SPEC
 144 #define SUBTARGET_CPP_SPEC "%(netbsd_cpp_spec)"
 145
 146 /* Provide a LINK_SPEC appropriate for a NetBSD/mips target.
 147    This is a copy of LINK_SPEC from <netbsd-elf.h> tweaked for
 148    the MIPS target.  */
 149
 150 #undef LINK_SPEC
 151 #define LINK_SPEC \
 152   "%{EL:-m elf32lmip} \
 153    %{EB:-m elf32bmip} \
 154    %(endian_spec) \
 155    %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32} %{mips32r2} %{mips64} \
 156    %{bestGnum} %{call_shared} %{no_archive} %{exact_version} \
 157    %(netbsd_link_spec)"
 158
 159 #define NETBSD_ENTRY_POINT "__start"
 160
 161 #undef SUBTARGET_ASM_SPEC
 162 #define SUBTARGET_ASM_SPEC \
 163   "%{!mno-abicalls: \
 164      %{!fno-PIC:%{!fno-pic:-KPIC}}}"
 165
 166
 167 /* -G is incompatible with -KPIC which is the default, so only allow objects
 168    in the small data section if the user explicitly asks for it.  */
 169
 170 #undef MIPS_DEFAULT_GVALUE
 171 #define MIPS_DEFAULT_GVALUE 0
 172
 173
 174 /* This defines which switch letters take arguments.  -G is a MIPS
 175    special.  */
 176
 177 #undef SWITCH_TAKES_ARG
 178 #define SWITCH_TAKES_ARG(CHAR)                                          \
 179   (DEFAULT_SWITCH_TAKES_ARG (CHAR)                                      \
 180    || (CHAR) == 'R'                                                     \
 181    || (CHAR) == 'G')
 182
 183
 184 #undef ASM_FINAL_SPEC
 185 #undef SET_ASM_OP
 186
 187
 188 /* NetBSD hasn't historically provided _flush_cache(), but rather
 189    _cacheflush(), which takes the same arguments as the former.  */
 190 #undef CACHE_FLUSH_FUNC
 191 #define CACHE_FLUSH_FUNC "_cacheflush"
 192
 193
 194 /* Make gcc agree with <machine/ansi.h> */
 195
 196 #undef WCHAR_TYPE
 197 #define WCHAR_TYPE "int"
 198
 199 #undef WCHAR_TYPE_SIZE
 200 #define WCHAR_TYPE_SIZE 32
 201
 202 #undef WINT_TYPE
 203 #define WINT_TYPE "int"