libffi/include/ffi_mips.h

   1 /* -----------------------------------------------------------------------
   2    ffi-mips.h - Copyright (c) 1996 Cygnus Support
   3
   4    MIPS FFI Definitions
   5
   6    $Id: ffi_mips.h,v 1.1.1.1 1998/11/29 16:48:16 green Exp $
   7
   8    Permission is hereby granted, free of charge, to any person obtaining
   9    a copy of this software and associated documentation files (the
  10    ``Software''), to deal in the Software without restriction, including
  11    without limitation the rights to use, copy, modify, merge, publish,
  12    distribute, sublicense, and/or sell copies of the Software, and to
  13    permit persons to whom the Software is furnished to do so, subject to
  14    the following conditions:
  15
  16    The above copyright notice and this permission notice shall be included
  17    in all copies or substantial portions of the Software.
  18
  19    THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  22    IN NO EVENT SHALL CYGNUS SUPPORT BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23    OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25    OTHER DEALINGS IN THE SOFTWARE.
  26    ----------------------------------------------------------------------- */
  27
  28 #ifndef FFI_MIPS_H
  29
  30 #include <ffi.h>
  31
  32 #if !defined(_MIPS_SIM)
  33 -- something is very wrong --
  34 #else
  35 #  if _MIPS_SIM==_ABIN32 && defined(_ABIN32)
  36 #    define FFI_MIPS_N32
  37 #  else
  38 #    if defined(__GNUC__)
  39 #      define FFI_MIPS_O32
  40 #    else
  41 #      if _MIPS_SIM==_ABIO32
  42 #        define FFI_MIPS_O32
  43 #      else
  44 -- this is an unsupported platform --
  45 #      endif
  46 #    endif
  47 #  endif
  48 #endif
  49
  50 #define v0 $2
  51 #define v1 $3
  52 #define a0 $4
  53 #define a1 $5
  54 #define a2 $6
  55 #define a3 $7
  56 #define a4 $8
  57 #define a5 $9
  58 #define a6 $10
  59 #define a7 $11
  60 #define t0 $8
  61 #define t1 $9
  62 #define t2 $10
  63 #define t3 $11
  64 #define t4 $12
  65 #define t5 $13
  66 #define t6 $14
  67 #define t7 $15
  68 #define t8 $24
  69 #define t9 $25
  70 #define ra $31
  71
  72 #if defined(FFI_MIPS_O32)
  73
  74 #define FFI_DEFAULT_ABI FFI_O32
  75
  76 /* O32 stack frames have 32bit integer args */
  77 #define SLOT_TYPE_UNSIGNED UINT32
  78 #define SLOT_TYPE_SIGNED   SINT32
  79 #define SIZEOF_ARG         4
  80
  81 #define REG_L   lw
  82 #define REG_S   sw
  83 #define SUBU    subu
  84 #define ADDU    addu
  85 #define SRL     srl
  86 #define LI      li
  87
  88 #else
  89
  90 #define FFI_DEFAULT_ABI FFI_N32
  91
  92 /* N32 and N64 frames have 64bit integer args */
  93 #define SLOT_TYPE_UNSIGNED UINT64
  94 #define SLOT_TYPE_SIGNED   SINT64
  95 #define SIZEOF_ARG         8
  96
  97 #define REG_L   ld
  98 #define REG_S   sd
  99 #define SUBU    dsubu
 100 #define ADDU    daddu
 101 #define SRL     dsrl
 102 #define LI      dli
 103
 104 #endif
 105
 106 #define FFI_FLAG_BITS 2
 107
 108 /* SGI's strange assembler requires that we multiply by 4 rather
 109    than shift left by FFI_FLAG_BITS */
 110
 111 #define FFI_ARGS_D   FFI_TYPE_DOUBLE
 112 #define FFI_ARGS_F   FFI_TYPE_FLOAT
 113 #define FFI_ARGS_DD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_DOUBLE
 114 #define FFI_ARGS_FF  FFI_TYPE_FLOAT * 4 +  FFI_TYPE_FLOAT
 115 #define FFI_ARGS_FD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_FLOAT
 116 #define FFI_ARGS_DF  FFI_TYPE_FLOAT * 4 + FFI_TYPE_DOUBLE
 117
 118 /* Needed for N32 structure returns */
 119 #define FFI_TYPE_SMALLSTRUCT  FFI_TYPE_UINT8
 120 #define FFI_TYPE_SMALLSTRUCT2 FFI_TYPE_SINT8
 121
 122 #if 0
 123
 124 /* The SGI assembler can't handle this.. */
 125
 126 #define FFI_TYPE_STRUCT_DD (( FFI_ARGS_DD ) << 4) + FFI_TYPE_STRUCT
 127
 128 #else
 129
 130 /* ...so we calculate these by hand! */
 131
 132 #define FFI_TYPE_STRUCT_D      61
 133 #define FFI_TYPE_STRUCT_F      45
 134 #define FFI_TYPE_STRUCT_DD     253
 135 #define FFI_TYPE_STRUCT_FF     173
 136 #define FFI_TYPE_STRUCT_FD     237
 137 #define FFI_TYPE_STRUCT_DF     189
 138 #define FFI_TYPE_STRUCT_SMALL  93
 139 #define FFI_TYPE_STRUCT_SMALL2 109
 140
 141 #endif
 142
 143 #endif