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 #if (WITH_TARGET_WORD_BITSIZE == 16)
  76   if (stop >= 16)
  77     return 0;
  78   else
  79     {
  80       if (start < 16)
  81         val &= LSMASK (start, 0);
  82       val >>= stop;
  83       return val;
  84     }
  85 #endif
  86 }
  87
  88
  89 INLINE_SIM_BITS\
  90 (unsigned_word)
  91 MSEXTRACTED (unsigned_word val,
  92              int start,
  93              int stop)
  94 {
  95   ASSERT (start <= stop);
  96 #if (WITH_TARGET_WORD_BITSIZE == 64)
  97   return MSEXTRACTED64 (val, start, stop);
  98 #endif
  99 #if (WITH_TARGET_WORD_BITSIZE == 32)
 100   if (stop < 32)
 101     return 0;
 102   else
 103     {
 104       if (start >= 32)
 105         val &= MSMASK (start, 64 - 1);
 106       val >>= (64 - stop - 1);
 107       return val;
 108     }
 109 #endif
 110 #if (WITH_TARGET_WORD_BITSIZE == 16)
 111   if (stop < 16)
 112     return 0;
 113   else
 114     {
 115       if (start >= 16)
 116         val &= MSMASK (start, 64 - 1);
 117       val >>= (64 - stop - 1);
 118       return val;
 119     }
 120 #endif
 121 }
 122
 123
 124 INLINE_SIM_BITS\
 125 (unsigned_word)
 126 LSINSERTED (unsigned_word val,
 127             int start,
 128             int stop)
 129 {
 130   ASSERT (start >= stop);
 131 #if (WITH_TARGET_WORD_BITSIZE == 64)
 132   return LSINSERTED64 (val, start, stop);
 133 #endif
 134 #if (WITH_TARGET_WORD_BITSIZE == 32)
 135   /* Bit numbers are 63..0, even for 32 bit targets.
 136      On 32 bit targets we ignore 63..32  */
 137   if (stop >= 32)
 138     return 0;
 139   else
 140     {
 141       val <<= stop;
 142       val &= LSMASK (start, stop);
 143       return val;
 144     }
 145 #endif
 146 #if (WITH_TARGET_WORD_BITSIZE == 16)
 147   /* Bit numbers are 63..0, even for 16 bit targets.
 148      On 16 bit targets we ignore 63..16  */
 149   if (stop >= 16)
 150     return 0;
 151   else
 152     {
 153       val <<= stop;
 154       val &= LSMASK (start, stop);
 155       return val;
 156     }
 157 #endif
 158 }
 159
 160 INLINE_SIM_BITS\
 161 (unsigned_word)
 162 MSINSERTED (unsigned_word val,
 163             int start,
 164             int stop)
 165 {
 166   ASSERT (start <= stop);
 167 #if (WITH_TARGET_WORD_BITSIZE == 64)
 168   return MSINSERTED64 (val, start, stop);
 169 #endif
 170 #if (WITH_TARGET_WORD_BITSIZE == 32)
 171   /* Bit numbers are 0..63, even for 32 bit targets.
 172      On 32 bit targets we ignore 0..31.  */
 173   if (stop < 32)
 174     return 0;
 175   else
 176     {
 177       val <<= ((64 - 1) - stop);
 178       val &= MSMASK (start, stop);
 179       return val;
 180     }
 181 #endif
 182 #if (WITH_TARGET_WORD_BITSIZE == 16)
 183   /* Bit numbers are 0..63, even for 16 bit targets.
 184      On 16 bit targets we ignore 0..47.  */
 185   if (stop < 32 + 16)
 186     return 0;
 187   else
 188     {
 189       val <<= ((64 - 1) - stop);
 190       val &= MSMASK (start, stop);
 191       return val;
 192     }
 193 #endif
 194 }
 195
 196
 197
 198 INLINE_SIM_BITS\
 199 (unsigned_word)
 200 LSSEXT (signed_word val,
 201         int sign_bit)
 202 {
 203   ASSERT (sign_bit < 64);
 204 #if (WITH_TARGET_WORD_BITSIZE == 64)
 205   return LSSEXT64 (val, sign_bit);
 206 #endif
 207 #if (WITH_TARGET_WORD_BITSIZE == 32)
 208   if (sign_bit >= 32)
 209     return val;
 210   else {
 211     val = LSSEXT32 (val, sign_bit);
 212     return val;
 213   }
 214 #endif
 215 #if (WITH_TARGET_WORD_BITSIZE == 16)
 216   if (sign_bit >= 16)
 217     return val;
 218   else {
 219     val = LSSEXT16 (val, sign_bit);
 220     return val;
 221   }
 222 #endif
 223 }
 224
 225 INLINE_SIM_BITS\
 226 (unsigned_word)
 227 MSSEXT (signed_word val,
 228         int sign_bit)
 229 {
 230   ASSERT (sign_bit < 64);
 231 #if (WITH_TARGET_WORD_BITSIZE == 64)
 232   return MSSEXT64 (val, sign_bit);
 233 #endif
 234 #if (WITH_TARGET_WORD_BITSIZE == 32)
 235   if (sign_bit < 32)
 236     return val;
 237   else {
 238     val = MSSEXT32 (val, sign_bit - 32);
 239     return val;
 240   }
 241 #endif
 242 #if (WITH_TARGET_WORD_BITSIZE == 16)
 243   if (sign_bit < 32 + 16)
 244     return val;
 245   else {
 246     val = MSSEXT16 (val, sign_bit - 32 - 16);
 247     return val;
 248   }
 249 #endif
 250 }
 251
 252
 253
 254 #define N 8
 255 #include "sim-n-bits.h"
 256 #undef N
 257
 258 #define N 16
 259 #include "sim-n-bits.h"
 260 #undef N
 261
 262 #define N 32
 263 #include "sim-n-bits.h"
 264 #undef N
 265
 266 #define N 64
 267 #include "sim-n-bits.h"
 268 #undef N
 269
 270 #endif /* _SIM_BITS_C_ */