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, EXPRESS
  17    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  19    IN NO EVENT SHALL CYGNUS SOLUTIONS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20    OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22    OTHER DEALINGS IN THE SOFTWARE.
  23
  24    ----------------------------------------------------------------------- */
  25
  26 #ifndef LIBFFI_TARGET_H
  27 #define LIBFFI_TARGET_H
  28
  29 #if !defined(_MIPS_SIM)
  30 -- something is very wrong --
  31 #else
  32 #  if (_MIPS_SIM==_ABIN32 && defined(_ABIN32)) || (_MIPS_SIM==_ABI64 && defined(_ABI64))
  33 #    define FFI_MIPS_N32
  34 #  else
  35 #    if (_MIPS_SIM==_ABIO32 && defined(_ABIO32))
  36 #      define FFI_MIPS_O32
  37 #    else
  38 -- this is an unsupported platform --
  39 #    endif
  40 #  endif
  41 #endif
  42
  43 #ifdef FFI_MIPS_O32
  44 /* O32 stack frames have 32bit integer args */
  45 #define FFI_SIZEOF_ARG         4
  46 #else
  47 /* N32 and N64 frames have 64bit integer args */
  48 #define FFI_SIZEOF_ARG         8
  49 #endif
  50
  51 #define FFI_FLAG_BITS 2
  52
  53 /* SGI's strange assembler requires that we multiply by 4 rather
  54    than shift left by FFI_FLAG_BITS */
  55
  56 #define FFI_ARGS_D   FFI_TYPE_DOUBLE
  57 #define FFI_ARGS_F   FFI_TYPE_FLOAT
  58 #define FFI_ARGS_DD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_DOUBLE
  59 #define FFI_ARGS_FF  FFI_TYPE_FLOAT * 4 +  FFI_TYPE_FLOAT
  60 #define FFI_ARGS_FD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_FLOAT
  61 #define FFI_ARGS_DF  FFI_TYPE_FLOAT * 4 + FFI_TYPE_DOUBLE
  62
  63 /* Needed for N32 structure returns */
  64 #define FFI_TYPE_SMALLSTRUCT  FFI_TYPE_UINT8
  65 #define FFI_TYPE_SMALLSTRUCT2 FFI_TYPE_SINT8
  66
  67 #if 0
  68 /* The SGI assembler can't handle this.. */
  69 #define FFI_TYPE_STRUCT_DD (( FFI_ARGS_DD ) << 4) + FFI_TYPE_STRUCT
  70 /* (and so on) */
  71 #else
  72 /* ...so we calculate these by hand! */
  73 #define FFI_TYPE_STRUCT_D      61
  74 #define FFI_TYPE_STRUCT_F      45
  75 #define FFI_TYPE_STRUCT_DD     253
  76 #define FFI_TYPE_STRUCT_FF     173
  77 #define FFI_TYPE_STRUCT_FD     237
  78 #define FFI_TYPE_STRUCT_DF     189
  79 #define FFI_TYPE_STRUCT_SMALL  93
  80 #define FFI_TYPE_STRUCT_SMALL2 109
  81 #endif
  82
  83 #ifdef LIBFFI_ASM
  84 #define v0 $2
  85 #define v1 $3
  86 #define a0 $4
  87 #define a1 $5
  88 #define a2 $6
  89 #define a3 $7
  90 #define a4 $8
  91 #define a5 $9
  92 #define a6 $10
  93 #define a7 $11
  94 #define t0 $8
  95 #define t1 $9
  96 #define t2 $10
  97 #define t3 $11
  98 #define t4 $12
  99 #define t5 $13
 100 #define t6 $14
 101 #define t7 $15
 102 #define t8 $24
 103 #define t9 $25
 104 #define ra $31
 105
 106 #ifdef FFI_MIPS_O32
 107 #define REG_L   lw
 108 #define REG_S   sw
 109 #define SUBU    subu
 110 #define ADDU    addu
 111 #define SRL     srl
 112 #define LI      li
 113 #else /* !FFI_MIPS_O32 */
 114 #define REG_L   ld
 115 #define REG_S   sd
 116 #define SUBU    dsubu
 117 #define ADDU    daddu
 118 #define SRL     dsrl
 119 #define LI      dli
 120 #endif /* !FFI_MIPS_O32 */
 121 #else /* !LIBFFI_ASM */
 122 #ifdef FFI_MIPS_O32
 123 /* O32 stack frames have 32bit integer args */
 124 typedef unsigned int     ffi_arg __attribute__((__mode__(__SI__)));
 125 typedef signed   int     ffi_sarg __attribute__((__mode__(__SI__)));
 126 #else
 127 /* N32 and N64 frames have 64bit integer args */
 128 typedef unsigned int     ffi_arg __attribute__((__mode__(__DI__)));
 129 typedef signed   int     ffi_sarg __attribute__((__mode__(__DI__)));
 130 #endif
 131
 132 typedef enum ffi_abi {
 133   FFI_FIRST_ABI = 0,
 134   FFI_O32,
 135   FFI_N32,
 136   FFI_N64,
 137   FFI_O32_SOFT_FLOAT,
 138
 139 #ifdef FFI_MIPS_O32
 140 #ifdef __mips_soft_float
 141   FFI_DEFAULT_ABI = FFI_O32_SOFT_FLOAT,
 142 #else
 143   FFI_DEFAULT_ABI = FFI_O32,
 144 #endif
 145 #else
 146   FFI_DEFAULT_ABI = FFI_N32,
 147 #endif
 148
 149   FFI_LAST_ABI = FFI_DEFAULT_ABI + 1
 150 } ffi_abi;
 151
 152 #define FFI_EXTRA_CIF_FIELDS unsigned rstruct_flag
 153 #endif /* !LIBFFI_ASM */
 154
 155 /* ---- Definitions for closures ----------------------------------------- */
 156
 157 #if defined(FFI_MIPS_O32)
 158 #define FFI_CLOSURES 1
 159 #define FFI_TRAMPOLINE_SIZE 20
 160 #else
 161 /* N32/N64 not implemented yet. */
 162 #define FFI_CLOSURES 0
 163 #endif /* FFI_MIPS_O32 */
 164 #define FFI_NATIVE_RAW_API 0
 165
 166 #endif
 167