sim/ppc/ppc-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 _ENDIAN_C_
  23 #define _ENDIAN_C_
  24
  25 #ifndef STATIC_INLINE_ENDIAN
  26 #define STATIC_INLINE_ENDIAN STATIC_INLINE
  27 #endif
  28
  29
  30 #include "config.h"
  31 #include "ppc-config.h"
  32 #include "words.h"
  33 #include "ppc-endian.h"
  34 #include "sim_callbacks.h"
  35
  36 #if (WITH_HOST_BYTE_ORDER == LITTLE_ENDIAN) && WITH_NTOH
  37 #define SWAP_2(SET,RAW) SET htons (RAW)
  38 #endif
  39
  40 #ifndef SWAP_2
  41 #define SWAP_2(SET,RAW) SET (((RAW) >> 8) | ((RAW) << 8))
  42 #endif
  43
  44 #if !defined(SWAP_4) && (WITH_HOST_BYTE_ORDER == LITTLE_ENDIAN) && WITH_NTOH
  45 #define SWAP_4(SET,RAW) SET htonl (RAW)
  46 #endif
  47
  48 #ifndef SWAP_4
  49 #define SWAP_4(SET,RAW) SET (((RAW) << 24) | (((RAW) & 0xff00) << 8) | (((RAW) & 0xff0000) >> 8) | ((RAW) >> 24))
  50 #endif
  51
  52 #ifndef SWAP_8
  53 #define SWAP_8(SET,RAW)                                                 \
  54   union { unsigned_8 dword; unsigned_4 words[2]; } in, out;             \
  55   in.dword = RAW;                                                       \
  56   SWAP_4 (out.words[0] =, in.words[1]);                                 \
  57   SWAP_4 (out.words[1] =, in.words[0]);                                 \
  58   SET out.dword;
  59 #endif
  60
  61 #ifndef ENDIAN_N
  62 #define ENDIAN_N(NAME,BYTE_SIZE) \
  63 INLINE unsigned_##BYTE_SIZE \
  64 endian_##NAME##_##BYTE_SIZE(unsigned_##BYTE_SIZE raw_in) \
  65 { \
  66   if (CURRENT_TARGET_BYTE_ORDER == CURRENT_HOST_BYTE_ORDER) { \
  67     return raw_in; \
  68   } \
  69   else { \
  70     SWAP_##BYTE_SIZE(return, raw_in); \
  71   } \
  72 }
  73 #endif
  74
  75 ENDIAN_N(h2t, 2)
  76 ENDIAN_N(h2t, 4)
  77 ENDIAN_N(h2t, 8)
  78 ENDIAN_N(t2h, 2)
  79 ENDIAN_N(t2h, 4)
  80 ENDIAN_N(t2h, 8)
  81
  82 #endif /* _ENDIAN_C_ */