sim/ppc/bits.c

   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 _BITS_C_
  23 #define _BITS_C_
  24
  25 #include "basics.h"
  26
  27
  28 INLINE_BITS\
  29 (unsigned32)
  30 MASKED32(unsigned32 word,
  31          unsigned start,
  32          unsigned stop)
  33 {
  34   return (word & MASK32(start, stop));
  35 }
  36
  37 INLINE_BITS\
  38 (unsigned64)
  39 MASKED64(unsigned64 word,
  40          unsigned start,
  41          unsigned stop)
  42 {
  43   return (word & MASK64(start, stop));
  44 }
  45
  46 INLINE_BITS\
  47 (unsigned_word)
  48 MASKED(unsigned_word word,
  49        unsigned start,
  50        unsigned stop)
  51 {
  52   return ((word) & MASK(start, stop));
  53 }
  54
  55
  56
  57 INLINE_BITS\
  58 (unsigned_word)
  59 EXTRACTED(unsigned_word word,
  60           unsigned start,
  61           unsigned stop)
  62 {
  63   ASSERT(start <= stop);
  64 #if (WITH_TARGET_WORD_BITSIZE == 64)
  65   return _EXTRACTEDn(64, word, start, stop);
  66 #else
  67   if (stop < 32)
  68     return 0;
  69   else
  70     return ((word >> (63 - stop))
  71             & MASK(start+(63-stop), 63));
  72 #endif
  73 }
  74
  75
  76 INLINE_BITS\
  77 (unsigned_word)
  78 INSERTED(unsigned_word word,
  79          unsigned start,
  80          unsigned stop)
  81 {
  82   ASSERT(start <= stop);
  83 #if (WITH_TARGET_WORD_BITSIZE == 64)
  84   return _INSERTEDn(64, word, start, stop);
  85 #else
  86   if (stop < 32)
  87     return 0;
  88   else
  89     return ((word & MASK(start+(63-stop), 63))
  90             << (63 - stop));
  91 #endif
  92 }
  93
  94
  95 INLINE_BITS\
  96 (unsigned32)
  97 ROTL32(unsigned32 val,
  98        long shift)
  99 {
 100   ASSERT(shift >= 0 && shift <= 32);
 101   return _ROTLn(32, val, shift);
 102 }
 103
 104
 105 INLINE_BITS\
 106 (unsigned64)
 107 ROTL64(unsigned64 val,
 108        long shift)
 109 {
 110   ASSERT(shift >= 0 && shift <= 64);
 111   return _ROTLn(64, val, shift);
 112 }
 113
 114 #endif /* _BITS_C_ */