sim/common/sim-endian.c

   1 /* The common simulator framework for GDB, the GNU Debugger.
   2
   3    Copyright 2002-2013 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 3 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, see <http://www.gnu.org/licenses/>.  */
  21
  22
  23 #ifndef _SIM_ENDIAN_C_
  24 #define _SIM_ENDIAN_C_
  25
  26 #include "sim-basics.h"
  27 #include "sim-assert.h"
  28 #include "sim-io.h"
  29
  30
  31 #if !defined(_SWAP_1)
  32 #define _SWAP_1(SET,RAW) SET (RAW)
  33 #endif
  34
  35 #if !defined(_SWAP_2) && (WITH_HOST_BYTE_ORDER == LITTLE_ENDIAN) && defined(htons)
  36 #define _SWAP_2(SET,RAW) SET htons (RAW)
  37 #endif
  38
  39 #ifndef _SWAP_2
  40 #define _SWAP_2(SET,RAW) SET (((RAW) >> 8) | ((RAW) << 8))
  41 #endif
  42
  43 #if !defined(_SWAP_4) && (WITH_HOST_BYTE_ORDER == LITTLE_ENDIAN) && defined(htonl)
  44 #define _SWAP_4(SET,RAW) SET htonl (RAW)
  45 #endif
  46
  47 #ifndef _SWAP_4
  48 #define _SWAP_4(SET,RAW) SET (((RAW) << 24) | (((RAW) & 0xff00) << 8) | (((RAW) & 0xff0000) >> 8) | ((RAW) >> 24))
  49 #endif
  50
  51 #ifndef _SWAP_8
  52 #define _SWAP_8(SET,RAW) \
  53   union { unsigned_8 dword; unsigned_4 words[2]; } in, out; \
  54   in.dword = RAW; \
  55   _SWAP_4 (out.words[0] =, in.words[1]); \
  56   _SWAP_4 (out.words[1] =, in.words[0]); \
  57   SET out.dword;
  58 #endif
  59
  60 #ifndef _SWAP_16
  61 #define _SWAP_16(SET,RAW) \
  62   union { unsigned_16 word; unsigned_4 words[4]; } in, out; \
  63   in.word = (RAW); \
  64   _SWAP_4 (out.words[0] =, in.words[3]); \
  65   _SWAP_4 (out.words[1] =, in.words[2]); \
  66   _SWAP_4 (out.words[2] =, in.words[1]); \
  67   _SWAP_4 (out.words[3] =, in.words[0]); \
  68   SET out.word;
  69 #endif
  70
  71
  72 #define N 1
  73 #include "sim-n-endian.h"
  74 #undef N
  75
  76 #define N 2
  77 #include "sim-n-endian.h"
  78 #undef N
  79
  80 #define N 4
  81 #include "sim-n-endian.h"
  82 #undef N
  83
  84 #define N 8
  85 #include "sim-n-endian.h"
  86 #undef N
  87
  88 #define N 16
  89 #include "sim-n-endian.h"
  90 #undef N
  91
  92
  93 INLINE_SIM_ENDIAN\
  94 (unsigned_8)
  95 sim_endian_split_16 (unsigned_16 word, int w)
  96 {
  97   if (CURRENT_HOST_BYTE_ORDER == LITTLE_ENDIAN)
  98     {
  99       return word.a[1 - w];
 100     }
 101   else
 102     {
 103       return word.a[w];
 104     }
 105 }
 106
 107
 108 INLINE_SIM_ENDIAN\
 109 (unsigned_16)
 110 sim_endian_join_16 (unsigned_8 h, unsigned_8 l)
 111
 112 {
 113   unsigned_16 word;
 114   if (CURRENT_HOST_BYTE_ORDER == LITTLE_ENDIAN)
 115     {
 116       word.a[0] = l;
 117       word.a[1] = h;
 118     }
 119   else
 120     {
 121       word.a[0] = h;
 122       word.a[1] = l;
 123     }
 124   return word;
 125 }
 126
 127
 128
 129 #endif /* _SIM_ENDIAN_C_ */