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