gnu/dist/gdb6/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 INLINE_BITS\
  28 (unsigned64)
  29 LSMASKED64 (unsigned64 word,
  30             int start,
  31             int stop)
  32 {
  33   word &= LSMASK64 (start, stop);
  34   return word;
  35 }
  36
  37 INLINE_BITS\
  38 (unsigned64)
  39 LSEXTRACTED64 (unsigned64 val,
  40                int start,
  41                int stop)
  42 {
  43   val <<= (64 - 1 - start); /* drop high bits */
  44   val >>= (64 - 1 - start) + (stop); /* drop low bits */
  45   return val;
  46 }
  47
  48 INLINE_BITS\
  49 (unsigned32)
  50 MASKED32(unsigned32 word,
  51          unsigned start,
  52          unsigned stop)
  53 {
  54   return (word & MASK32(start, stop));
  55 }
  56
  57 INLINE_BITS\
  58 (unsigned64)
  59 MASKED64(unsigned64 word,
  60          unsigned start,
  61          unsigned stop)
  62 {
  63   return (word & MASK64(start, stop));
  64 }
  65
  66 INLINE_BITS\
  67 (unsigned_word)
  68 MASKED(unsigned_word word,
  69        unsigned start,
  70        unsigned stop)
  71 {
  72   return ((word) & MASK(start, stop));
  73 }
  74
  75
  76
  77 INLINE_BITS\
  78 (unsigned_word)
  79 EXTRACTED(unsigned_word word,
  80           unsigned start,
  81           unsigned stop)
  82 {
  83   ASSERT(start <= stop);
  84 #if (WITH_TARGET_WORD_BITSIZE == 64)
  85   return _EXTRACTEDn(64, word, start, stop);
  86 #else
  87   if (stop < 32)
  88     return 0;
  89   else
  90     return ((word >> (63 - stop))
  91             & MASK(start+(63-stop), 63));
  92 #endif
  93 }
  94
  95
  96 INLINE_BITS\
  97 (unsigned_word)
  98 INSERTED(unsigned_word word,
  99          unsigned start,
 100          unsigned stop)
 101 {
 102   ASSERT(start <= stop);
 103 #if (WITH_TARGET_WORD_BITSIZE == 64)
 104   return _INSERTEDn(64, word, start, stop);
 105 #else
 106   if (stop < 32)
 107     return 0;
 108   else
 109     return ((word & MASK(start+(63-stop), 63))
 110             << (63 - stop));
 111 #endif
 112 }
 113
 114
 115 INLINE_BITS\
 116 (unsigned32)
 117 ROTL32(unsigned32 val,
 118        long shift)
 119 {
 120   ASSERT(shift >= 0 && shift <= 32);
 121   return _ROTLn(32, val, shift);
 122 }
 123
 124
 125 INLINE_BITS\
 126 (unsigned64)
 127 ROTL64(unsigned64 val,
 128        long shift)
 129 {
 130   ASSERT(shift >= 0 && shift <= 64);
 131   return _ROTLn(64, val, shift);
 132 }
 133
 134 #endif /* _BITS_C_ */