sim/common/sim-bits.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1997, 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 _SIM_BITS_C_
  23 #define _SIM_BITS_C_
  24
  25 #include "sim-basics.h"
  26 #include "sim-assert.h"
  27 #include "sim-io.h"
  28
  29
  30 INLINE_SIM_BITS\
  31 (unsigned_word)
  32 LSMASKED (unsigned_word val,
  33           int start,
  34           int stop)
  35 {
  36   /* NOTE - start, stop can wrap */
  37   val &= LSMASK (start, stop);
  38   return val;
  39 }
  40
  41
  42 INLINE_SIM_BITS\
  43 (unsigned_word)
  44 MSMASKED (unsigned_word val,
  45           int start,
  46           int stop)
  47 {
  48   /* NOTE - start, stop can wrap */
  49   val &= MSMASK (start, stop);
  50   return val;
  51 }
  52
  53
  54 INLINE_SIM_BITS\
  55 (unsigned_word)
  56 LSEXTRACTED (unsigned_word val,
  57              int start,
  58              int stop)
  59 {
  60   ASSERT (start >= stop);
  61 #if (WITH_TARGET_WORD_BITSIZE == 64)
  62   return LSEXTRACTED64 (val, start, stop);
  63 #endif
  64 #if (WITH_TARGET_WORD_BITSIZE == 32)
  65   if (stop >= 32)
  66     return 0;
  67   else
  68     {
  69       if (start < 32)
  70         val &= LSMASK (start, 0);
  71       val >>= stop;
  72       return val;
  73     }
  74 #endif
  75 }
  76
  77
  78 INLINE_SIM_BITS\
  79 (unsigned_word)
  80 MSEXTRACTED (unsigned_word val,
  81              int start,
  82              int stop)
  83 {
  84   ASSERT (start <= stop);
  85 #if (WITH_TARGET_WORD_BITSIZE == 64)
  86   return MSEXTRACTED64 (val, start, stop);
  87 #endif
  88 #if (WITH_TARGET_WORD_BITSIZE == 32)
  89   if (stop < 32)
  90     return 0;
  91   else
  92     {
  93       if (start >= 32)
  94         val &= MSMASK (start, 64 - 1);
  95       val >>= (64 - stop - 1);
  96       return val;
  97     }
  98 #endif
  99 }
 100
 101
 102 INLINE_SIM_BITS\
 103 (unsigned_word)
 104 LSINSERTED (unsigned_word val,
 105             int start,
 106             int stop)
 107 {
 108   ASSERT (start >= stop);
 109 #if (WITH_TARGET_WORD_BITSIZE == 64)
 110   return LSINSERTED64 (val, start, stop);
 111 #endif
 112 #if (WITH_TARGET_WORD_BITSIZE == 32)
 113   /* Bit numbers are 63..0, even for 32 bit targets.
 114      On 32 bit targets we ignore 63..32  */
 115   if (stop >= 32)
 116     return 0;
 117   else
 118     {
 119       val <<= stop;
 120       val &= LSMASK (start, stop);
 121       return val;
 122     }
 123 #endif
 124 }
 125
 126 INLINE_SIM_BITS\
 127 (unsigned_word)
 128 MSINSERTED (unsigned_word val,
 129             int start,
 130             int stop)
 131 {
 132   ASSERT (start <= stop);
 133 #if (WITH_TARGET_WORD_BITSIZE == 64)
 134   return MSINSERTED64 (val, start, stop);
 135 #endif
 136 #if (WITH_TARGET_WORD_BITSIZE == 32)
 137   /* Bit numbers are 0..63, even for 32 bit targets.
 138      On 32 bit targets we ignore 0..31.  */
 139   if (stop < 32)
 140     return 0;
 141   else
 142     {
 143       val <<= ((64 - 1) - stop);
 144       val &= MSMASK (start, stop);
 145       return val;
 146     }
 147 #endif
 148 }
 149
 150
 151
 152 INLINE_SIM_BITS\
 153 (unsigned_word)
 154 LSSEXT (signed_word val,
 155         int sign_bit)
 156 {
 157   ASSERT (sign_bit < 64);
 158 #if (WITH_TARGET_WORD_BITSIZE == 64)
 159   return LSSEXT64 (val, sign_bit);
 160 #endif
 161 #if (WITH_TARGET_WORD_BITSIZE == 32)
 162   if (sign_bit >= 32)
 163     return val;
 164   else {
 165     val = LSSEXT32 (val, sign_bit);
 166     return val;
 167   }
 168 #endif
 169 }
 170
 171 INLINE_SIM_BITS\
 172 (unsigned_word)
 173 MSSEXT (signed_word val,
 174         int sign_bit)
 175 {
 176   ASSERT (sign_bit < 64);
 177 #if (WITH_TARGET_WORD_BITSIZE == 64)
 178   return MSSEXT64 (val, sign_bit);
 179 #endif
 180 #if (WITH_TARGET_WORD_BITSIZE == 32)
 181   if (sign_bit < 32)
 182     return val;
 183   else {
 184     val = MSSEXT32 (val, sign_bit - 32);
 185     return val;
 186   }
 187 #endif
 188 }
 189
 190
 191
 192 #define N 8
 193 #include "sim-n-bits.h"
 194 #undef N
 195
 196 #define N 16
 197 #include "sim-n-bits.h"
 198 #undef N
 199
 200 #define N 32
 201 #include "sim-n-bits.h"
 202 #undef N
 203
 204 #define N 64
 205 #include "sim-n-bits.h"
 206 #undef N
 207
 208 #endif /* _SIM_BITS_C_ */