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 #if !defined(_MIPS_SIM)
  31 -- something is very wrong --
  32 #else
  33 #  if (_MIPS_SIM==_ABIN32 && defined(_ABIN32)) || (_MIPS_SIM==_ABI64 && defined(_ABI64))
  34 #    define FFI_MIPS_N32
  35 #  else
  36 #    if (_MIPS_SIM==_ABIO32 && defined(_ABIO32))
  37 #      define FFI_MIPS_O32
  38 #    else
  39 -- this is an unsupported platform --
  40 #    endif
  41 #  endif
  42 #endif
  43
  44 #ifdef FFI_MIPS_O32
  45 /* O32 stack frames have 32bit integer args */
  46 #  define FFI_SIZEOF_ARG    4
  47 #else
  48 /* N32 and N64 frames have 64bit integer args */
  49 #  define FFI_SIZEOF_ARG    8
  50 #  if _MIPS_SIM == _ABIN32
  51 #    define FFI_SIZEOF_JAVA_RAW  4
  52 #  endif
  53 #endif
  54
  55 #define FFI_FLAG_BITS 2
  56
  57 /* SGI's strange assembler requires that we multiply by 4 rather
  58    than shift left by FFI_FLAG_BITS */
  59
  60 #define FFI_ARGS_D   FFI_TYPE_DOUBLE
  61 #define FFI_ARGS_F   FFI_TYPE_FLOAT
  62 #define FFI_ARGS_DD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_DOUBLE
  63 #define FFI_ARGS_FF  FFI_TYPE_FLOAT * 4 +  FFI_TYPE_FLOAT
  64 #define FFI_ARGS_FD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_FLOAT
  65 #define FFI_ARGS_DF  FFI_TYPE_FLOAT * 4 + FFI_TYPE_DOUBLE
  66
  67 /* Needed for N32 structure returns */
  68 #define FFI_TYPE_SMALLSTRUCT  FFI_TYPE_UINT8
  69 #define FFI_TYPE_SMALLSTRUCT2 FFI_TYPE_SINT8
  70
  71 #if 0
  72 /* The SGI assembler can't handle this.. */
  73 #define FFI_TYPE_STRUCT_DD (( FFI_ARGS_DD ) << 4) + FFI_TYPE_STRUCT
  74 /* (and so on) */
  75 #else
  76 /* ...so we calculate these by hand! */
  77 #define FFI_TYPE_STRUCT_D      61
  78 #define FFI_TYPE_STRUCT_F      45
  79 #define FFI_TYPE_STRUCT_DD     253
  80 #define FFI_TYPE_STRUCT_FF     173
  81 #define FFI_TYPE_STRUCT_FD     237
  82 #define FFI_TYPE_STRUCT_DF     189
  83 #define FFI_TYPE_STRUCT_SMALL  93
  84 #define FFI_TYPE_STRUCT_SMALL2 109
  85 #endif
  86
  87 #ifdef LIBFFI_ASM
  88 #define v0 $2
  89 #define v1 $3
  90 #define a0 $4
  91 #define a1 $5
  92 #define a2 $6
  93 #define a3 $7
  94 #define a4 $8
  95 #define a5 $9
  96 #define a6 $10
  97 #define a7 $11
  98 #define t0 $8
  99 #define t1 $9
 100 #define t2 $10
 101 #define t3 $11
 102 #define t4 $12
 103 #define t5 $13
 104 #define t6 $14
 105 #define t7 $15
 106 #define t8 $24
 107 #define t9 $25
 108 #define ra $31
 109
 110 #ifdef FFI_MIPS_O32
 111 # define REG_L  lw
 112 # define REG_S  sw
 113 # define SUBU   subu
 114 # define ADDU   addu
 115 # define SRL    srl
 116 # define LI     li
 117 #else /* !FFI_MIPS_O32 */
 118 # define REG_L  ld
 119 # define REG_S  sd
 120 # define SUBU   dsubu
 121 # define ADDU   daddu
 122 # define SRL    dsrl
 123 # define LI     dli
 124 # if (_MIPS_SIM==_ABI64)
 125 #  define LA dla
 126 #  define EH_FRAME_ALIGN 3
 127 #  define FDE_ADDR_BYTES .8byte
 128 # else
 129 #  define LA la
 130 #  define EH_FRAME_ALIGN 2
 131 #  define FDE_ADDR_BYTES .4byte
 132 # endif /* _MIPS_SIM==_ABI64 */
 133 #endif /* !FFI_MIPS_O32 */
 134 #else /* !LIBFFI_ASM */
 135 #ifdef FFI_MIPS_O32
 136 /* O32 stack frames have 32bit integer args */
 137 typedef unsigned int     ffi_arg __attribute__((__mode__(__SI__)));
 138 typedef signed   int     ffi_sarg __attribute__((__mode__(__SI__)));
 139 #else
 140 /* N32 and N64 frames have 64bit integer args */
 141 typedef unsigned int     ffi_arg __attribute__((__mode__(__DI__)));
 142 typedef signed   int     ffi_sarg __attribute__((__mode__(__DI__)));
 143 #endif
 144
 145 typedef enum ffi_abi {
 146   FFI_FIRST_ABI = 0,
 147   FFI_O32,
 148   FFI_N32,
 149   FFI_N64,
 150   FFI_O32_SOFT_FLOAT,
 151
 152 #ifdef FFI_MIPS_O32
 153 #ifdef __mips_soft_float
 154   FFI_DEFAULT_ABI = FFI_O32_SOFT_FLOAT,
 155 #else
 156   FFI_DEFAULT_ABI = FFI_O32,
 157 #endif
 158 #else
 159 # if _MIPS_SIM==_ABI64
 160   FFI_DEFAULT_ABI = FFI_N64,
 161 # else
 162   FFI_DEFAULT_ABI = FFI_N32,
 163 # endif
 164 #endif
 165
 166   FFI_LAST_ABI = FFI_DEFAULT_ABI + 1
 167 } ffi_abi;
 168
 169 #define FFI_EXTRA_CIF_FIELDS unsigned rstruct_flag
 170 #endif /* !LIBFFI_ASM */
 171
 172 /* ---- Definitions for closures ----------------------------------------- */
 173
 174 #if defined(FFI_MIPS_O32)
 175 #define FFI_CLOSURES 1
 176 #define FFI_TRAMPOLINE_SIZE 20
 177 #else
 178 /* N32/N64. */
 179 # define FFI_CLOSURES 1
 180 #if _MIPS_SIM==_ABI64
 181 #define FFI_TRAMPOLINE_SIZE 52
 182 #else
 183 #define FFI_TRAMPOLINE_SIZE 20
 184 #endif
 185 #endif /* FFI_MIPS_O32 */
 186 #define FFI_NATIVE_RAW_API 0
 187
 188 #endif
 189