libffi/src/mips/ffitarget.h

   1 /* -----------------------------------------------------------------*-C-*-
   2    ffitarget.h - Copyright (c) 1996-2003  Red Hat, Inc.
   3    Target configuration macros for MIPS.
   4
   5    Permission is hereby granted, free of charge, to any person obtaining
   6    a copy of this software and associated documentation files (the
   7    ``Software''), to deal in the Software without restriction, including
   8    without limitation the rights to use, copy, modify, merge, publish,
   9    distribute, sublicense, and/or sell copies of the Software, and to
  10    permit persons to whom the Software is furnished to do so, subject to
  11    the following conditions:
  12
  13    The above copyright notice and this permission notice shall be included
  14    in all copies or substantial portions of the Software.
  15
  16    THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
  17    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19    NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  20    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23    DEALINGS IN THE SOFTWARE.
  24
  25    ----------------------------------------------------------------------- */
  26
  27 #ifndef LIBFFI_TARGET_H
  28 #define LIBFFI_TARGET_H
  29
  30 #ifdef linux
  31 # include <asm/sgidefs.h>
  32 #elif defined(__rtems__)
  33 /*
  34  * Subprogram calling convention - copied from sgidefs.h
  35  */
  36 #define _MIPS_SIM_ABI32         1
  37 #define _MIPS_SIM_NABI32        2
  38 #define _MIPS_SIM_ABI64         3
  39 #else
  40 # include <sgidefs.h>
  41 #endif
  42
  43 #  ifndef _ABIN32
  44 #    define _ABIN32 _MIPS_SIM_NABI32
  45 #  endif
  46 #  ifndef _ABI64
  47 #    define _ABI64 _MIPS_SIM_ABI64
  48 #  endif
  49 #  ifndef _ABIO32
  50 #    define _ABIO32 _MIPS_SIM_ABI32
  51 #  endif
  52
  53 #if !defined(_MIPS_SIM)
  54 -- something is very wrong --
  55 #else
  56 #  if (_MIPS_SIM==_ABIN32 && defined(_ABIN32)) || (_MIPS_SIM==_ABI64 && defined(_ABI64))
  57 #    define FFI_MIPS_N32
  58 #  else
  59 #    if (_MIPS_SIM==_ABIO32 && defined(_ABIO32))
  60 #      define FFI_MIPS_O32
  61 #    else
  62 -- this is an unsupported platform --
  63 #    endif
  64 #  endif
  65 #endif
  66
  67 #ifdef FFI_MIPS_O32
  68 /* O32 stack frames have 32bit integer args */
  69 #  define FFI_SIZEOF_ARG    4
  70 #else
  71 /* N32 and N64 frames have 64bit integer args */
  72 #  define FFI_SIZEOF_ARG    8
  73 #  if _MIPS_SIM == _ABIN32
  74 #    define FFI_SIZEOF_JAVA_RAW  4
  75 #  endif
  76 #endif
  77
  78 #define FFI_FLAG_BITS 2
  79
  80 /* SGI's strange assembler requires that we multiply by 4 rather
  81    than shift left by FFI_FLAG_BITS */
  82
  83 #define FFI_ARGS_D   FFI_TYPE_DOUBLE
  84 #define FFI_ARGS_F   FFI_TYPE_FLOAT
  85 #define FFI_ARGS_DD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_DOUBLE
  86 #define FFI_ARGS_FF  FFI_TYPE_FLOAT * 4 +  FFI_TYPE_FLOAT
  87 #define FFI_ARGS_FD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_FLOAT
  88 #define FFI_ARGS_DF  FFI_TYPE_FLOAT * 4 + FFI_TYPE_DOUBLE
  89
  90 /* Needed for N32 structure returns */
  91 #define FFI_TYPE_SMALLSTRUCT  FFI_TYPE_UINT8
  92 #define FFI_TYPE_SMALLSTRUCT2 FFI_TYPE_SINT8
  93
  94 #if 0
  95 /* The SGI assembler can't handle this.. */
  96 #define FFI_TYPE_STRUCT_DD (( FFI_ARGS_DD ) << 4) + FFI_TYPE_STRUCT
  97 /* (and so on) */
  98 #else
  99 /* ...so we calculate these by hand! */
 100 #define FFI_TYPE_STRUCT_D      61
 101 #define FFI_TYPE_STRUCT_F      45
 102 #define FFI_TYPE_STRUCT_DD     253
 103 #define FFI_TYPE_STRUCT_FF     173
 104 #define FFI_TYPE_STRUCT_FD     237
 105 #define FFI_TYPE_STRUCT_DF     189
 106 #define FFI_TYPE_STRUCT_SMALL  93
 107 #define FFI_TYPE_STRUCT_SMALL2 109
 108
 109 /* and for n32 soft float, add 16 * 2^4 */
 110 #define FFI_TYPE_STRUCT_D_SOFT      317
 111 #define FFI_TYPE_STRUCT_F_SOFT      301
 112 #define FFI_TYPE_STRUCT_DD_SOFT     509
 113 #define FFI_TYPE_STRUCT_FF_SOFT     429
 114 #define FFI_TYPE_STRUCT_FD_SOFT     493
 115 #define FFI_TYPE_STRUCT_DF_SOFT     445
 116 #define FFI_TYPE_STRUCT_SOFT        16
 117 #endif
 118
 119 #ifdef LIBFFI_ASM
 120 #define v0 $2
 121 #define v1 $3
 122 #define a0 $4
 123 #define a1 $5
 124 #define a2 $6
 125 #define a3 $7
 126 #define a4 $8
 127 #define a5 $9
 128 #define a6 $10
 129 #define a7 $11
 130 #define t0 $8
 131 #define t1 $9
 132 #define t2 $10
 133 #define t3 $11
 134 #define t4 $12
 135 #define t5 $13
 136 #define t6 $14
 137 #define t7 $15
 138 #define t8 $24
 139 #define t9 $25
 140 #define ra $31
 141
 142 #ifdef FFI_MIPS_O32
 143 # define REG_L  lw
 144 # define REG_S  sw
 145 # define SUBU   subu
 146 # define ADDU   addu
 147 # define SRL    srl
 148 # define LI     li
 149 #else /* !FFI_MIPS_O32 */
 150 # define REG_L  ld
 151 # define REG_S  sd
 152 # define SUBU   dsubu
 153 # define ADDU   daddu
 154 # define SRL    dsrl
 155 # define LI     dli
 156 # if (_MIPS_SIM==_ABI64)
 157 #  define LA dla
 158 #  define EH_FRAME_ALIGN 3
 159 #  define FDE_ADDR_BYTES .8byte
 160 # else
 161 #  define LA la
 162 #  define EH_FRAME_ALIGN 2
 163 #  define FDE_ADDR_BYTES .4byte
 164 # endif /* _MIPS_SIM==_ABI64 */
 165 #endif /* !FFI_MIPS_O32 */
 166 #else /* !LIBFFI_ASM */
 167 # ifdef __GNUC__
 168 #  ifdef FFI_MIPS_O32
 169 /* O32 stack frames have 32bit integer args */
 170 typedef unsigned int     ffi_arg __attribute__((__mode__(__SI__)));
 171 typedef signed   int     ffi_sarg __attribute__((__mode__(__SI__)));
 172 #else
 173 /* N32 and N64 frames have 64bit integer args */
 174 typedef unsigned int     ffi_arg __attribute__((__mode__(__DI__)));
 175 typedef signed   int     ffi_sarg __attribute__((__mode__(__DI__)));
 176 #  endif
 177 # else
 178 #  ifdef FFI_MIPS_O32
 179 /* O32 stack frames have 32bit integer args */
 180 typedef __uint32_t ffi_arg;
 181 typedef __int32_t ffi_sarg;
 182 #  else
 183 /* N32 and N64 frames have 64bit integer args */
 184 typedef __uint64_t ffi_arg;
 185 typedef __int64_t ffi_sarg;
 186 #  endif
 187 # endif /* __GNUC__ */
 188
 189 typedef enum ffi_abi {
 190   FFI_FIRST_ABI = 0,
 191   FFI_O32,
 192   FFI_N32,
 193   FFI_N64,
 194   FFI_O32_SOFT_FLOAT,
 195   FFI_N32_SOFT_FLOAT,
 196   FFI_N64_SOFT_FLOAT,
 197
 198 #ifdef FFI_MIPS_O32
 199 #ifdef __mips_soft_float
 200   FFI_DEFAULT_ABI = FFI_O32_SOFT_FLOAT,
 201 #else
 202   FFI_DEFAULT_ABI = FFI_O32,
 203 #endif
 204 #else
 205 # if _MIPS_SIM==_ABI64
 206 #  ifdef __mips_soft_float
 207   FFI_DEFAULT_ABI = FFI_N64_SOFT_FLOAT,
 208 #  else
 209   FFI_DEFAULT_ABI = FFI_N64,
 210 #  endif
 211 # else
 212 #  ifdef __mips_soft_float
 213   FFI_DEFAULT_ABI = FFI_N32_SOFT_FLOAT,
 214 #  else
 215   FFI_DEFAULT_ABI = FFI_N32,
 216 #  endif
 217 # endif
 218 #endif
 219
 220   FFI_LAST_ABI = FFI_DEFAULT_ABI + 1
 221 } ffi_abi;
 222
 223 #define FFI_EXTRA_CIF_FIELDS unsigned rstruct_flag
 224 #endif /* !LIBFFI_ASM */
 225
 226 /* ---- Definitions for closures ----------------------------------------- */
 227
 228 #if defined(FFI_MIPS_O32)
 229 #define FFI_CLOSURES 1
 230 #define FFI_TRAMPOLINE_SIZE 20
 231 #else
 232 /* N32/N64. */
 233 # define FFI_CLOSURES 1
 234 #if _MIPS_SIM==_ABI64
 235 #define FFI_TRAMPOLINE_SIZE 52
 236 #else
 237 #define FFI_TRAMPOLINE_SIZE 20
 238 #endif
 239 #endif /* FFI_MIPS_O32 */
 240 #define FFI_NATIVE_RAW_API 0
 241
 242 #endif
 243