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
  37 typedef union {
  38   unsigned_1 val_1[8];
  39   unsigned_2 val_2[4];
  40   unsigned_4 val_4[2];
  41   unsigned_8 val_8[1];
  42 } endian_map;
  43
  44 #define ENDIAN_N(NAME,BYTE_SIZE) \
  45 unsigned_##BYTE_SIZE \
  46 endian_##NAME##_##BYTE_SIZE(unsigned_##BYTE_SIZE raw_in) \
  47 { \
  48   if (CURRENT_TARGET_BYTE_ORDER == CURRENT_HOST_BYTE_ORDER) { \
  49     return raw_in; \
  50   } \
  51   else { \
  52     endian_map in; \
  53     endian_map out; \
  54     int byte_nr; \
  55     in.val_##BYTE_SIZE[0] = raw_in; \
  56     for (byte_nr = 0; byte_nr < BYTE_SIZE; byte_nr++) { \
  57       out.val_1[BYTE_SIZE-1-byte_nr] = in.val_1[byte_nr]; \
  58     } \
  59     return out.val_##BYTE_SIZE[0]; \
  60   } \
  61 }
  62
  63
  64 ENDIAN_N(h2t, 2)
  65 ENDIAN_N(h2t, 4)
  66 ENDIAN_N(h2t, 8)
  67 ENDIAN_N(t2h, 2)
  68 ENDIAN_N(t2h, 4)
  69 ENDIAN_N(t2h, 8)
  70
  71 #endif /* _ENDIAN_C_ */