sim/common/sim-n-endian.h

   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 N
  23 #error "N must be #defined"
  24 #endif
  25
  26 /* NOTE: See end of file for #undef */
  27 #define unsigned_N XCONCAT2(unsigned_,N)
  28 #define endian_t2h_N XCONCAT2(endian_t2h_,N)
  29 #define endian_h2t_N XCONCAT2(endian_h2t_,N)
  30 #define _SWAP_N XCONCAT2(_SWAP_,N)
  31 #define swap_N XCONCAT2(swap_,N)
  32 #define endian_h2be_N XCONCAT2(endian_h2be_,N)
  33 #define endian_be2h_N XCONCAT2(endian_be2h_,N)
  34 #define endian_h2le_N XCONCAT2(endian_h2le_,N)
  35 #define endian_le2h_N XCONCAT2(endian_le2h_,N)
  36 #define offset_N XCONCAT2(offset_,N)
  37
  38
  39 INLINE_SIM_ENDIAN\
  40 (unsigned_N)
  41 endian_t2h_N(unsigned_N raw_in)
  42 {
  43   if (CURRENT_TARGET_BYTE_ORDER == CURRENT_HOST_BYTE_ORDER) {
  44     return raw_in;
  45   }
  46   else {
  47     _SWAP_N(return,raw_in);
  48   }
  49 }
  50
  51
  52 INLINE_SIM_ENDIAN\
  53 (unsigned_N)
  54 endian_h2t_N(unsigned_N raw_in)
  55 {
  56   if (CURRENT_TARGET_BYTE_ORDER == CURRENT_HOST_BYTE_ORDER) {
  57     return raw_in;
  58   }
  59   else {
  60     _SWAP_N(return,raw_in);
  61   }
  62 }
  63
  64
  65 INLINE_SIM_ENDIAN\
  66 (unsigned_N)
  67 swap_N(unsigned_N raw_in)
  68 {
  69   _SWAP_N(return,raw_in);
  70 }
  71
  72
  73
  74 INLINE_SIM_ENDIAN\
  75 (unsigned_N)
  76 endian_h2be_N(unsigned_N raw_in)
  77 {
  78   if (CURRENT_HOST_BYTE_ORDER == BIG_ENDIAN) {
  79     return raw_in;
  80   }
  81   else {
  82     _SWAP_N(return,raw_in);
  83   }
  84 }
  85
  86
  87 INLINE_SIM_ENDIAN\
  88 (unsigned_N)
  89 endian_be2h_N(unsigned_N raw_in)
  90 {
  91   if (CURRENT_HOST_BYTE_ORDER == BIG_ENDIAN) {
  92     return raw_in;
  93   }
  94   else {
  95     _SWAP_N(return,raw_in);
  96   }
  97 }
  98
  99
 100 INLINE_SIM_ENDIAN\
 101 (unsigned_N)
 102 endian_h2le_N(unsigned_N raw_in)
 103 {
 104   if (CURRENT_HOST_BYTE_ORDER == LITTLE_ENDIAN) {
 105     return raw_in;
 106   }
 107   else {
 108     _SWAP_N(return,raw_in);
 109   }
 110 }
 111
 112
 113 INLINE_SIM_ENDIAN\
 114 (unsigned_N)
 115 endian_le2h_N(unsigned_N raw_in)
 116 {
 117   if (CURRENT_HOST_BYTE_ORDER == LITTLE_ENDIAN) {
 118     return raw_in;
 119   }
 120   else {
 121     _SWAP_N(return,raw_in);
 122   }
 123 }
 124
 125
 126
 127 INLINE_SIM_ENDIAN\
 128 (void*)
 129 offset_N(unsigned_N *x,
 130          int sizeof_word,
 131          int word)
 132 {
 133   char *in = (char*)x;
 134   char *out;
 135   int offset = sizeof_word * word;
 136   ASSERT(offset + sizeof_word <= sizeof(unsigned_N));
 137   ASSERT(word < (sizeof_word / sizeof(unsigned_N)));
 138   ASSERT((sizeof(unsigned_N) % sizeof_word) == 0);
 139   if (WITH_HOST_BYTE_ORDER == LITTLE_ENDIAN) {
 140     out = in + sizeof(unsigned_N) - offset;
 141   }
 142   else {
 143     out = in + offset;
 144   }
 145   return out;
 146 }
 147
 148
 149 /* NOTE: See start of file for #define */
 150 #undef unsigned_N
 151 #undef endian_t2h_N
 152 #undef endian_h2t_N
 153 #undef _SWAP_N
 154 #undef swap_N
 155 #undef endian_h2be_N
 156 #undef endian_be2h_N
 157 #undef endian_h2le_N
 158 #undef endian_le2h_N
 159 #undef offset_N