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    2007 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 3, 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21
  22 /* Define default target values.  */
  23
  24 #undef MACHINE_TYPE
  25 #if TARGET_ENDIAN_DEFAULT != 0
  26 #define MACHINE_TYPE "NetBSD/mipseb ELF"
  27 #else
  28 #define MACHINE_TYPE "NetBSD/mipsel ELF"
  29 #endif
  30
  31 #define TARGET_OS_CPP_BUILTINS()                        \
  32   do                                                    \
  33     {                                                   \
  34       NETBSD_OS_CPP_BUILTINS_ELF();                     \
  35       builtin_define ("__NO_LEADING_UNDERSCORES__");    \
  36       builtin_define ("__GP_SUPPORT__");                \
  37       if (TARGET_LONG64)                                \
  38         builtin_define ("__LONG64");                    \
  39                                                         \
  40       if (TARGET_ABICALLS)                              \
  41         builtin_define ("__ABICALLS__");                \
  42                                                         \
  43       if (mips_abi == ABI_EABI)                         \
  44         builtin_define ("__mips_eabi");                 \
  45       else if (mips_abi == ABI_N32)                     \
  46         builtin_define ("__mips_n32");                  \
  47       else if (mips_abi == ABI_64)                      \
  48         builtin_define ("__mips_n64");                  \
  49       else if (mips_abi == ABI_O64)                     \
  50         builtin_define ("__mips_o64");                  \
  51     }                                                   \
  52   while (0)
  53
  54 /* The generic MIPS TARGET_CPU_CPP_BUILTINS are incorrect for NetBSD.
  55    Specifically, they define too many namespace-invasive macros.  Override
  56    them here.  Note this is structured for easy comparison to the version
  57    in mips.h.
  58
  59    FIXME: This probably isn't the best solution.  But in the absence
  60    of something better, it will have to do, for now.  */
  61
  62 #undef TARGET_CPU_CPP_BUILTINS
  63 #define TARGET_CPU_CPP_BUILTINS()                               \
  64   do                                                            \
  65     {                                                           \
  66       builtin_assert ("cpu=mips");                              \
  67       builtin_define ("__mips__");                              \
  68       builtin_define ("_mips");                                 \
  69                                                                 \
  70       /* No _R3000 or _R4000.  */                               \
  71       if (TARGET_64BIT)                                         \
  72         builtin_define ("__mips64");                            \
  73                                                                 \
  74       if (TARGET_FLOAT64)                                       \
  75         builtin_define ("__mips_fpr=64");                       \
  76       else                                                      \
  77         builtin_define ("__mips_fpr=32");                       \
  78                                                                 \
  79       if (TARGET_MIPS16)                                        \
  80         builtin_define ("__mips16");                            \
  81                                                                 \
  82       MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info);    \
  83       MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info);    \
  84                                                                 \
  85       if (ISA_MIPS1)                                            \
  86         builtin_define ("__mips=1");                            \
  87       else if (ISA_MIPS2)                                       \
  88         builtin_define ("__mips=2");                            \
  89       else if (ISA_MIPS3)                                       \
  90         builtin_define ("__mips=3");                            \
  91       else if (ISA_MIPS4)                                       \
  92         builtin_define ("__mips=4");                            \
  93       else if (ISA_MIPS32)                                      \
  94         {                                                       \
  95           builtin_define ("__mips=32");                         \
  96           builtin_define ("__mips_isa_rev=1");                  \
  97         }                                                       \
  98       else if (ISA_MIPS32R2)                                    \
  99         {                                                       \
 100           builtin_define ("__mips=32");                         \
 101           builtin_define ("__mips_isa_rev=2");                  \
 102         }                                                       \
 103       else if (ISA_MIPS64)                                      \
 104         {                                                       \
 105           builtin_define ("__mips=64");                         \
 106           builtin_define ("__mips_isa_rev=1");                  \
 107         }                                                       \
 108                                                                 \
 109       if (TARGET_HARD_FLOAT)                                    \
 110         builtin_define ("__mips_hard_float");                   \
 111       else if (TARGET_SOFT_FLOAT)                               \
 112         builtin_define ("__mips_soft_float");                   \
 113                                                                 \
 114       if (TARGET_SINGLE_FLOAT)                                  \
 115         builtin_define ("__mips_single_float");                 \
 116                                                                 \
 117       if (TARGET_BIG_ENDIAN)                                    \
 118         builtin_define ("__MIPSEB__");                          \
 119       else                                                      \
 120         builtin_define ("__MIPSEL__");                          \
 121                                                                 \
 122       /* No language dialect defines.  */                       \
 123                                                                 \
 124       /* ABIs handled in TARGET_OS_CPP_BUILTINS.  */            \
 125     }                                                           \
 126   while (0)
 127
 128
 129 /* Clean up after the generic MIPS/ELF configuration.  */
 130 #undef MD_EXEC_PREFIX
 131 #undef MD_STARTFILE_PREFIX
 132
 133 /* Extra specs we need.  */
 134 #undef SUBTARGET_EXTRA_SPECS
 135 #define SUBTARGET_EXTRA_SPECS                                           \
 136   { "netbsd_cpp_spec",          NETBSD_CPP_SPEC },                      \
 137   { "netbsd_link_spec",         NETBSD_LINK_SPEC_ELF },                 \
 138   { "netbsd_entry_point",       NETBSD_ENTRY_POINT },
 139
 140 /* Provide a SUBTARGET_CPP_SPEC appropriate for NetBSD.  */
 141
 142 #undef SUBTARGET_CPP_SPEC
 143 #define SUBTARGET_CPP_SPEC "%(netbsd_cpp_spec)"
 144
 145 /* Provide a LINK_SPEC appropriate for a NetBSD/mips target.
 146    This is a copy of LINK_SPEC from <netbsd-elf.h> tweaked for
 147    the MIPS target.  */
 148
 149 #undef LINK_SPEC
 150 #define LINK_SPEC \
 151   "%{EL:-m elf32lmip} \
 152    %{EB:-m elf32bmip} \
 153    %(endian_spec) \
 154    %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32} %{mips32r2} %{mips64} \
 155    %{bestGnum} %{call_shared} %{no_archive} %{exact_version} \
 156    %(netbsd_link_spec)"
 157
 158 #define NETBSD_ENTRY_POINT "__start"
 159
 160 #undef SUBTARGET_ASM_SPEC
 161 #define SUBTARGET_ASM_SPEC \
 162   "%{!mno-abicalls: \
 163      %{!fno-PIC:%{!fno-pic:-KPIC}}}"
 164
 165
 166 /* -G is incompatible with -KPIC which is the default, so only allow objects
 167    in the small data section if the user explicitly asks for it.  */
 168
 169 #undef MIPS_DEFAULT_GVALUE
 170 #define MIPS_DEFAULT_GVALUE 0
 171
 172
 173 /* This defines which switch letters take arguments.  -G is a MIPS
 174    special.  */
 175
 176 #undef SWITCH_TAKES_ARG
 177 #define SWITCH_TAKES_ARG(CHAR)                                          \
 178   (DEFAULT_SWITCH_TAKES_ARG (CHAR)                                      \
 179    || (CHAR) == 'R'                                                     \
 180    || (CHAR) == 'G')
 181
 182
 183 #undef ASM_FINAL_SPEC
 184 #undef SET_ASM_OP
 185
 186
 187 /* NetBSD hasn't historically provided _flush_cache(), but rather
 188    _cacheflush(), which takes the same arguments as the former.  */
 189 #undef CACHE_FLUSH_FUNC
 190 #define CACHE_FLUSH_FUNC "_cacheflush"
 191
 192
 193 /* Make gcc agree with <machine/ansi.h> */
 194
 195 #undef WCHAR_TYPE
 196 #define WCHAR_TYPE "int"
 197
 198 #undef WCHAR_TYPE_SIZE
 199 #define WCHAR_TYPE_SIZE 32
 200
 201 #undef WINT_TYPE
 202 #define WINT_TYPE "int"