gnu/dist/gdb6/sim/common/sim-endian.c

   1 /* The common simulator framework for GDB, the GNU Debugger.
   2
   3    Copyright 2002 Free Software Foundation, Inc.
   4
   5    Contributed by Andrew Cagney and Red Hat.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24
  25 #ifndef _SIM_ENDIAN_C_
  26 #define _SIM_ENDIAN_C_
  27
  28 #include "sim-basics.h"
  29 #include "sim-assert.h"
  30 #include "sim-io.h"
  31
  32
  33 #if !defined(_SWAP_1)
  34 #define _SWAP_1(SET,RAW) SET (RAW)
  35 #endif
  36
  37 #if !defined(_SWAP_2) && (WITH_HOST_BYTE_ORDER == LITTLE_ENDIAN) && defined(htons)
  38 #define _SWAP_2(SET,RAW) SET htons (RAW)
  39 #endif
  40
  41 #ifndef _SWAP_2
  42 #define _SWAP_2(SET,RAW) SET (((RAW) >> 8) | ((RAW) << 8))
  43 #endif
  44
  45 #if !defined(_SWAP_4) && (WITH_HOST_BYTE_ORDER == LITTLE_ENDIAN) && defined(htonl)
  46 #define _SWAP_4(SET,RAW) SET htonl (RAW)
  47 #endif
  48
  49 #ifndef _SWAP_4
  50 #define _SWAP_4(SET,RAW) SET (((RAW) << 24) | (((RAW) & 0xff00) << 8) | (((RAW) & 0xff0000) >> 8) | ((RAW) >> 24))
  51 #endif
  52
  53 #ifndef _SWAP_8
  54 #define _SWAP_8(SET,RAW) \
  55   union { unsigned_8 dword; unsigned_4 words[2]; } in, out; \
  56   in.dword = RAW; \
  57   _SWAP_4 (out.words[0] =, in.words[1]); \
  58   _SWAP_4 (out.words[1] =, in.words[0]); \
  59   SET out.dword;
  60 #endif
  61
  62 #ifndef _SWAP_16
  63 #define _SWAP_16(SET,RAW) \
  64   union { unsigned_16 word; unsigned_4 words[4]; } in, out; \
  65   in.word = (RAW); \
  66   _SWAP_4 (out.words[0] =, in.words[3]); \
  67   _SWAP_4 (out.words[1] =, in.words[2]); \
  68   _SWAP_4 (out.words[2] =, in.words[1]); \
  69   _SWAP_4 (out.words[3] =, in.words[0]); \
  70   SET out.word;
  71 #endif
  72
  73
  74 #define N 1
  75 #include "sim-n-endian.h"
  76 #undef N
  77
  78 #define N 2
  79 #include "sim-n-endian.h"
  80 #undef N
  81
  82 #define N 4
  83 #include "sim-n-endian.h"
  84 #undef N
  85
  86 #define N 8
  87 #include "sim-n-endian.h"
  88 #undef N
  89
  90 #define N 16
  91 #include "sim-n-endian.h"
  92 #undef N
  93
  94
  95 INLINE_SIM_ENDIAN\
  96 (unsigned_8)
  97 sim_endian_split_16 (unsigned_16 word, int w)
  98 {
  99   if (CURRENT_HOST_BYTE_ORDER == LITTLE_ENDIAN)
 100     {
 101       return word.a[1 - w];
 102     }
 103   else
 104     {
 105       return word.a[w];
 106     }
 107 }
 108
 109
 110 INLINE_SIM_ENDIAN\
 111 (unsigned_16)
 112 sim_endian_join_16 (unsigned_8 h, unsigned_8 l)
 113
 114 {
 115   unsigned_16 word;
 116   if (CURRENT_HOST_BYTE_ORDER == LITTLE_ENDIAN)
 117     {
 118       word.a[0] = l;
 119       word.a[1] = h;
 120     }
 121   else
 122     {
 123       word.a[0] = h;
 124       word.a[1] = l;
 125     }
 126   return word;
 127 }
 128
 129
 130
 131 #endif /* _SIM_ENDIAN_C_ */