sim/common/sim-endian.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21
  22 #ifndef _SIM_ENDIAN_C_
  23 #define _SIM_ENDIAN_C_
  24
  25 #include "sim-basics.h"
  26 #include "sim-assert.h"
  27 #include "sim-io.h"
  28
  29
  30 #if !defined(_SWAP_1)
  31 #define _SWAP_1(SET,RAW) SET (RAW)
  32 #endif
  33
  34 #if !defined(_SWAP_2) && (WITH_HOST_BYTE_ORDER == LITTLE_ENDIAN) && defined(htons)
  35 #define _SWAP_2(SET,RAW) SET htons (RAW)
  36 #endif
  37
  38 #ifndef _SWAP_2
  39 #define _SWAP_2(SET,RAW) SET (((RAW) >> 8) | ((RAW) << 8))
  40 #endif
  41
  42 #if !defined(_SWAP_4) && (WITH_HOST_BYTE_ORDER == LITTLE_ENDIAN) && defined(htonl)
  43 #define _SWAP_4(SET,RAW) SET htonl (RAW)
  44 #endif
  45
  46 #ifndef _SWAP_4
  47 #define _SWAP_4(SET,RAW) SET (((RAW) << 24) | (((RAW) & 0xff00) << 8) | (((RAW) & 0xff0000) >> 8) | ((RAW) >> 24))
  48 #endif
  49
  50 #ifndef _SWAP_8
  51 #define _SWAP_8(SET,RAW) \
  52   union { unsigned_8 dword; unsigned_4 words[2]; } in, out; \
  53   in.dword = RAW; \
  54   _SWAP_4 (out.words[0] =, in.words[1]); \
  55   _SWAP_4 (out.words[1] =, in.words[0]); \
  56   SET out.dword;
  57 #endif
  58
  59 #ifndef _SWAP_16
  60 #define _SWAP_16(SET,RAW) \
  61   union { unsigned_16 word; unsigned_4 words[4]; } in, out; \
  62   in.word = (RAW); \
  63   _SWAP_4 (out.words[0] =, in.words[3]); \
  64   _SWAP_4 (out.words[1] =, in.words[2]); \
  65   _SWAP_4 (out.words[2] =, in.words[1]); \
  66   _SWAP_4 (out.words[3] =, in.words[0]); \
  67   SET out.word;
  68 #endif
  69
  70
  71 #define N 1
  72 #include "sim-n-endian.h"
  73 #undef N
  74
  75 #define N 2
  76 #include "sim-n-endian.h"
  77 #undef N
  78
  79 #define N 4
  80 #include "sim-n-endian.h"
  81 #undef N
  82
  83 #define N 8
  84 #include "sim-n-endian.h"
  85 #undef N
  86
  87 #define N 16
  88 #include "sim-n-endian.h"
  89 #undef N
  90
  91
  92 INLINE_SIM_ENDIAN\
  93 (unsigned_8)
  94 sim_endian_split_16 (unsigned_16 word, int w)
  95 {
  96   if (CURRENT_HOST_BYTE_ORDER == LITTLE_ENDIAN)
  97     {
  98       return word.a[1 - w];
  99     }
 100   else
 101     {
 102       return word.a[w];
 103     }
 104 }
 105
 106
 107 INLINE_SIM_ENDIAN\
 108 (unsigned_16)
 109 sim_endian_join_16 (unsigned_8 h, unsigned_8 l)
 110
 111 {
 112   unsigned_16 word;
 113   if (CURRENT_HOST_BYTE_ORDER == LITTLE_ENDIAN)
 114     {
 115       word.a[0] = l;
 116       word.a[1] = h;
 117     }
 118   else
 119     {
 120       word.a[0] = h;
 121       word.a[1] = l;
 122     }
 123   return word;
 124 }
 125
 126
 127
 128 #endif /* _SIM_ENDIAN_C_ */