libffi/include/ffi_mips.h

   1 /* -----------------------------------------------------------------------
   2    ffi-mips.h - Copyright (c) 1996 Cygnus Support
   3
   4    MIPS FFI Definitions
   5
   6    Permission is hereby granted, free of charge, to any person obtaining
   7    a copy of this software and associated documentation files (the
   8    ``Software''), to deal in the Software without restriction, including
   9    without limitation the rights to use, copy, modify, merge, publish,
  10    distribute, sublicense, and/or sell copies of the Software, and to
  11    permit persons to whom the Software is furnished to do so, subject to
  12    the following conditions:
  13
  14    The above copyright notice and this permission notice shall be included
  15    in all copies or substantial portions of the Software.
  16
  17    THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20    IN NO EVENT SHALL CYGNUS SUPPORT BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21    OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23    OTHER DEALINGS IN THE SOFTWARE.
  24    ----------------------------------------------------------------------- */
  25
  26 #ifndef FFI_MIPS_H
  27
  28 #include <ffi.h>
  29
  30 #if !defined(_MIPS_SIM)
  31 -- something is very wrong --
  32 #else
  33 #  if _MIPS_SIM==_ABIN32 && defined(_ABIN32)
  34 #    define FFI_MIPS_N32
  35 #  else
  36 #    if defined(__GNUC__)
  37 #      define FFI_MIPS_O32
  38 #    else
  39 #      if _MIPS_SIM==_ABIO32
  40 #        define FFI_MIPS_O32
  41 #      else
  42 -- this is an unsupported platform --
  43 #      endif
  44 #    endif
  45 #  endif
  46 #endif
  47
  48 #define v0 $2
  49 #define v1 $3
  50 #define a0 $4
  51 #define a1 $5
  52 #define a2 $6
  53 #define a3 $7
  54 #define a4 $8
  55 #define a5 $9
  56 #define a6 $10
  57 #define a7 $11
  58 #define t0 $8
  59 #define t1 $9
  60 #define t2 $10
  61 #define t3 $11
  62 #define t4 $12
  63 #define t5 $13
  64 #define t6 $14
  65 #define t7 $15
  66 #define t8 $24
  67 #define t9 $25
  68 #define ra $31
  69
  70 #if defined(FFI_MIPS_O32)
  71
  72 #define FFI_DEFAULT_ABI FFI_O32
  73
  74 /* O32 stack frames have 32bit integer args */
  75 #define SLOT_TYPE_UNSIGNED UINT32
  76 #define SLOT_TYPE_SIGNED   SINT32
  77 #define SIZEOF_ARG         4
  78
  79 #define REG_L   lw
  80 #define REG_S   sw
  81 #define SUBU    subu
  82 #define ADDU    addu
  83 #define SRL     srl
  84 #define LI      li
  85
  86 #else
  87
  88 #define FFI_DEFAULT_ABI FFI_N32
  89
  90 /* N32 and N64 frames have 64bit integer args */
  91 #define SLOT_TYPE_UNSIGNED UINT64
  92 #define SLOT_TYPE_SIGNED   SINT64
  93 #define SIZEOF_ARG         8
  94
  95 #define REG_L   ld
  96 #define REG_S   sd
  97 #define SUBU    dsubu
  98 #define ADDU    daddu
  99 #define SRL     dsrl
 100 #define LI      dli
 101
 102 #endif
 103
 104 #define FFI_FLAG_BITS 2
 105
 106 /* SGI's strange assembler requires that we multiply by 4 rather
 107    than shift left by FFI_FLAG_BITS */
 108
 109 #define FFI_ARGS_D   FFI_TYPE_DOUBLE
 110 #define FFI_ARGS_F   FFI_TYPE_FLOAT
 111 #define FFI_ARGS_DD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_DOUBLE
 112 #define FFI_ARGS_FF  FFI_TYPE_FLOAT * 4 +  FFI_TYPE_FLOAT
 113 #define FFI_ARGS_FD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_FLOAT
 114 #define FFI_ARGS_DF  FFI_TYPE_FLOAT * 4 + FFI_TYPE_DOUBLE
 115
 116 /* Needed for N32 structure returns */
 117 #define FFI_TYPE_SMALLSTRUCT  FFI_TYPE_UINT8
 118 #define FFI_TYPE_SMALLSTRUCT2 FFI_TYPE_SINT8
 119
 120 #if 0
 121
 122 /* The SGI assembler can't handle this.. */
 123
 124 #define FFI_TYPE_STRUCT_DD (( FFI_ARGS_DD ) << 4) + FFI_TYPE_STRUCT
 125
 126 #else
 127
 128 /* ...so we calculate these by hand! */
 129
 130 #define FFI_TYPE_STRUCT_D      61
 131 #define FFI_TYPE_STRUCT_F      45
 132 #define FFI_TYPE_STRUCT_DD     253
 133 #define FFI_TYPE_STRUCT_FF     173
 134 #define FFI_TYPE_STRUCT_FD     237
 135 #define FFI_TYPE_STRUCT_DF     189
 136 #define FFI_TYPE_STRUCT_SMALL  93
 137 #define FFI_TYPE_STRUCT_SMALL2 109
 138
 139 #endif
 140
 141 #endif