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
  27
  28 INLINE_SIM_BITS\
  29 (unsigned_word)
  30 MASKED(unsigned_word val,
  31        unsigned start,
  32        unsigned stop)
  33 {
  34   return ((val) & MASK(start, stop));
  35 }
  36
  37
  38
  39 INLINE_SIM_BITS\
  40 (unsigned_word)
  41 LSMASKED(unsigned_word val,
  42          unsigned nr_bits)
  43 {
  44   return MASKED(val,
  45                 WITH_TARGET_WORD_BITSIZE - nr_bits,
  46                 WITH_TARGET_WORD_BITSIZE - 1);
  47 }
  48
  49
  50
  51 INLINE_SIM_BITS\
  52 (unsigned_word)
  53 EXTRACTED(unsigned_word val,
  54           unsigned start,
  55           unsigned stop)
  56 {
  57   ASSERT(start <= stop);
  58 #if (WITH_TARGET_WORD_BITSIZE == 64)
  59   return EXTRACTED64(val, start, stop);
  60 #endif
  61 #if (WITH_TARGET_WORD_BITSIZE == 32)
  62   if (stop < 32)
  63     return 0;
  64   else
  65     return ((val >> (63 - stop))
  66             & MASK(start+(63-stop), 63));
  67 #endif
  68 }
  69
  70
  71 INLINE_SIM_BITS\
  72 (unsigned_word)
  73 INSERTED(unsigned_word val,
  74          unsigned start,
  75          unsigned stop)
  76 {
  77   ASSERT(start <= stop);
  78 #if (WITH_TARGET_WORD_BITSIZE == 64)
  79   return INSERTED64(val, start, stop);
  80 #endif
  81 #if (WITH_TARGET_WORD_BITSIZE == 32)
  82   if (stop < 32)
  83     return 0;
  84   else
  85     return ((val & MASK(start+(63-stop), 63))
  86             << (63 - stop));
  87 #endif
  88 }
  89
  90
  91
  92
  93 #define N 16
  94 #include "sim-n-bits.h"
  95 #undef N
  96
  97 #define N 32
  98 #include "sim-n-bits.h"
  99 #undef N
 100
 101 #define N 64
 102 #include "sim-n-bits.h"
 103 #undef N
 104
 105 #endif /* _SIM_BITS_C_ */