sim/common/sim-endian.c

   1 /* The common simulator framework for GDB, the GNU Debugger.
   2
   3    Copyright 2002-2023 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 /* This must come before any other includes.  */
  27 #include "defs.h"
  28
  29 #include "bfd.h"
  30
  31 #include "sim-basics.h"
  32 #include "sim-assert.h"
  33
  34
  35 #if !defined(_SWAP_1)
  36 #define _SWAP_1(SET,RAW) SET (RAW)
  37 #endif
  38
  39 #if !defined(_SWAP_2) && (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE) && defined(htons)
  40 #define _SWAP_2(SET,RAW) SET htons (RAW)
  41 #endif
  42
  43 #ifndef _SWAP_2
  44 #define _SWAP_2(SET,RAW) SET (((RAW) >> 8) | ((RAW) << 8))
  45 #endif
  46
  47 #if !defined(_SWAP_4) && (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE) && defined(htonl)
  48 #define _SWAP_4(SET,RAW) SET htonl (RAW)
  49 #endif
  50
  51 #ifndef _SWAP_4
  52 #define _SWAP_4(SET,RAW) SET (((RAW) << 24) | (((RAW) & 0xff00) << 8) | (((RAW) & 0xff0000) >> 8) | ((RAW) >> 24))
  53 #endif
  54
  55 #ifndef _SWAP_8
  56 #define _SWAP_8(SET,RAW) \
  57   union { unsigned_8 dword; unsigned_4 words[2]; } in, out; \
  58   in.dword = RAW; \
  59   _SWAP_4 (out.words[0] =, in.words[1]); \
  60   _SWAP_4 (out.words[1] =, in.words[0]); \
  61   SET out.dword;
  62 #endif
  63
  64 #ifndef _SWAP_16
  65 #define _SWAP_16(SET,RAW) \
  66   union { unsigned_16 word; unsigned_4 words[4]; } in, out; \
  67   in.word = (RAW); \
  68   _SWAP_4 (out.words[0] =, in.words[3]); \
  69   _SWAP_4 (out.words[1] =, in.words[2]); \
  70   _SWAP_4 (out.words[2] =, in.words[1]); \
  71   _SWAP_4 (out.words[3] =, in.words[0]); \
  72   SET out.word;
  73 #endif
  74
  75
  76 #define N 1
  77 #include "sim-n-endian.h"
  78 #undef N
  79
  80 #define N 2
  81 #include "sim-n-endian.h"
  82 #undef N
  83
  84 #define N 4
  85 #include "sim-n-endian.h"
  86 #undef N
  87
  88 #define N 8
  89 #include "sim-n-endian.h"
  90 #undef N
  91
  92 #define N 16
  93 #include "sim-n-endian.h"
  94 #undef N
  95
  96
  97 INLINE_SIM_ENDIAN\
  98 (unsigned_8)
  99 sim_endian_split_16 (unsigned_16 word, int w)
 100 {
 101   if (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE)
 102     {
 103       return word.a[1 - w];
 104     }
 105   else
 106     {
 107       return word.a[w];
 108     }
 109 }
 110
 111
 112 INLINE_SIM_ENDIAN\
 113 (unsigned_16)
 114 sim_endian_join_16 (unsigned_8 h, unsigned_8 l)
 115
 116 {
 117   unsigned_16 word;
 118   if (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE)
 119     {
 120       word.a[0] = l;
 121       word.a[1] = h;
 122     }
 123   else
 124     {
 125       word.a[0] = h;
 126       word.a[1] = l;
 127     }
 128   return word;
 129 }
 130
 131
 132
 133 #endif /* _SIM_ENDIAN_C_ */