sim/common/sim-bits.c

   1 /* The common simulator framework for GDB, the GNU Debugger.
   2
   3    Copyright 2002 Free Software Foundation, Inc.
   4
   5    Contributed by Andrew Cagney and Red Hat.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24
  25 #ifndef _SIM_BITS_C_
  26 #define _SIM_BITS_C_
  27
  28 #include "sim-basics.h"
  29 #include "sim-assert.h"
  30 #include "sim-io.h"
  31
  32
  33 INLINE_SIM_BITS\
  34 (unsigned_word)
  35 LSMASKED (unsigned_word val,
  36           int start,
  37           int stop)
  38 {
  39   /* NOTE - start, stop can wrap */
  40   val &= LSMASK (start, stop);
  41   return val;
  42 }
  43
  44
  45 INLINE_SIM_BITS\
  46 (unsigned_word)
  47 MSMASKED (unsigned_word val,
  48           int start,
  49           int stop)
  50 {
  51   /* NOTE - start, stop can wrap */
  52   val &= MSMASK (start, stop);
  53   return val;
  54 }
  55
  56
  57 INLINE_SIM_BITS\
  58 (unsigned_word)
  59 LSEXTRACTED (unsigned_word val,
  60              int start,
  61              int stop)
  62 {
  63   ASSERT (start >= stop);
  64 #if (WITH_TARGET_WORD_BITSIZE == 64)
  65   return LSEXTRACTED64 (val, start, stop);
  66 #endif
  67 #if (WITH_TARGET_WORD_BITSIZE == 32)
  68   if (stop >= 32)
  69     return 0;
  70   else
  71     {
  72       if (start < 32)
  73         val &= LSMASK (start, 0);
  74       val >>= stop;
  75       return val;
  76     }
  77 #endif
  78 #if (WITH_TARGET_WORD_BITSIZE == 16)
  79   if (stop >= 16)
  80     return 0;
  81   else
  82     {
  83       if (start < 16)
  84         val &= LSMASK (start, 0);
  85       val >>= stop;
  86       return val;
  87     }
  88 #endif
  89 }
  90
  91
  92 INLINE_SIM_BITS\
  93 (unsigned_word)
  94 MSEXTRACTED (unsigned_word val,
  95              int start,
  96              int stop)
  97 {
  98   ASSERT (start <= stop);
  99 #if (WITH_TARGET_WORD_BITSIZE == 64)
 100   return MSEXTRACTED64 (val, start, stop);
 101 #endif
 102 #if (WITH_TARGET_WORD_BITSIZE == 32)
 103   if (stop < 32)
 104     return 0;
 105   else
 106     {
 107       if (start >= 32)
 108         val &= MSMASK (start, 64 - 1);
 109       val >>= (64 - stop - 1);
 110       return val;
 111     }
 112 #endif
 113 #if (WITH_TARGET_WORD_BITSIZE == 16)
 114   if (stop < 16)
 115     return 0;
 116   else
 117     {
 118       if (start >= 16)
 119         val &= MSMASK (start, 64 - 1);
 120       val >>= (64 - stop - 1);
 121       return val;
 122     }
 123 #endif
 124 }
 125
 126
 127 INLINE_SIM_BITS\
 128 (unsigned_word)
 129 LSINSERTED (unsigned_word val,
 130             int start,
 131             int stop)
 132 {
 133   ASSERT (start >= stop);
 134 #if (WITH_TARGET_WORD_BITSIZE == 64)
 135   return LSINSERTED64 (val, start, stop);
 136 #endif
 137 #if (WITH_TARGET_WORD_BITSIZE == 32)
 138   /* Bit numbers are 63..0, even for 32 bit targets.
 139      On 32 bit targets we ignore 63..32  */
 140   if (stop >= 32)
 141     return 0;
 142   else
 143     {
 144       val <<= stop;
 145       val &= LSMASK (start, stop);
 146       return val;
 147     }
 148 #endif
 149 #if (WITH_TARGET_WORD_BITSIZE == 16)
 150   /* Bit numbers are 63..0, even for 16 bit targets.
 151      On 16 bit targets we ignore 63..16  */
 152   if (stop >= 16)
 153     return 0;
 154   else
 155     {
 156       val <<= stop;
 157       val &= LSMASK (start, stop);
 158       return val;
 159     }
 160 #endif
 161 }
 162
 163 INLINE_SIM_BITS\
 164 (unsigned_word)
 165 MSINSERTED (unsigned_word val,
 166             int start,
 167             int stop)
 168 {
 169   ASSERT (start <= stop);
 170 #if (WITH_TARGET_WORD_BITSIZE == 64)
 171   return MSINSERTED64 (val, start, stop);
 172 #endif
 173 #if (WITH_TARGET_WORD_BITSIZE == 32)
 174   /* Bit numbers are 0..63, even for 32 bit targets.
 175      On 32 bit targets we ignore 0..31.  */
 176   if (stop < 32)
 177     return 0;
 178   else
 179     {
 180       val <<= ((64 - 1) - stop);
 181       val &= MSMASK (start, stop);
 182       return val;
 183     }
 184 #endif
 185 #if (WITH_TARGET_WORD_BITSIZE == 16)
 186   /* Bit numbers are 0..63, even for 16 bit targets.
 187      On 16 bit targets we ignore 0..47.  */
 188   if (stop < 32 + 16)
 189     return 0;
 190   else
 191     {
 192       val <<= ((64 - 1) - stop);
 193       val &= MSMASK (start, stop);
 194       return val;
 195     }
 196 #endif
 197 }
 198
 199
 200
 201 INLINE_SIM_BITS\
 202 (unsigned_word)
 203 LSSEXT (signed_word val,
 204         int sign_bit)
 205 {
 206   ASSERT (sign_bit < 64);
 207 #if (WITH_TARGET_WORD_BITSIZE == 64)
 208   return LSSEXT64 (val, sign_bit);
 209 #endif
 210 #if (WITH_TARGET_WORD_BITSIZE == 32)
 211   if (sign_bit >= 32)
 212     return val;
 213   else {
 214     val = LSSEXT32 (val, sign_bit);
 215     return val;
 216   }
 217 #endif
 218 #if (WITH_TARGET_WORD_BITSIZE == 16)
 219   if (sign_bit >= 16)
 220     return val;
 221   else {
 222     val = LSSEXT16 (val, sign_bit);
 223     return val;
 224   }
 225 #endif
 226 }
 227
 228 INLINE_SIM_BITS\
 229 (unsigned_word)
 230 MSSEXT (signed_word val,
 231         int sign_bit)
 232 {
 233   ASSERT (sign_bit < 64);
 234 #if (WITH_TARGET_WORD_BITSIZE == 64)
 235   return MSSEXT64 (val, sign_bit);
 236 #endif
 237 #if (WITH_TARGET_WORD_BITSIZE == 32)
 238   if (sign_bit < 32)
 239     return val;
 240   else {
 241     val = MSSEXT32 (val, sign_bit - 32);
 242     return val;
 243   }
 244 #endif
 245 #if (WITH_TARGET_WORD_BITSIZE == 16)
 246   if (sign_bit < 32 + 16)
 247     return val;
 248   else {
 249     val = MSSEXT16 (val, sign_bit - 32 - 16);
 250     return val;
 251   }
 252 #endif
 253 }
 254
 255
 256
 257 #define N 8
 258 #include "sim-n-bits.h"
 259 #undef N
 260
 261 #define N 16
 262 #include "sim-n-bits.h"
 263 #undef N
 264
 265 #define N 32
 266 #include "sim-n-bits.h"
 267 #undef N
 268
 269 #define N 64
 270 #include "sim-n-bits.h"
 271 #undef N
 272
 273 #endif /* _SIM_BITS_C_ */