aboutsummaryrefslogtreecommitdiff
path: root/sim/ppc/bits.c
blob: bf2f8f0d6e907f799e051db9a96b0911ebc993d9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/*  This file is part of the program psim.

    Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, see <http://www.gnu.org/licenses/>.
 
    */


#ifndef _BITS_C_
#define _BITS_C_

#include "basics.h"

INLINE_BITS\
(uint64_t)
LSMASKED64 (uint64_t word,
	    int start,
	    int stop)
{
  word &= LSMASK64 (start, stop);
  return word;
}

INLINE_BITS\
(uint64_t)
LSEXTRACTED64 (uint64_t val,
	       int start,
	       int stop)
{
  val <<= (64 - 1 - start); /* drop high bits */
  val >>= (64 - 1 - start) + (stop); /* drop low bits */
  return val;
}
 
INLINE_BITS\
(uint32_t)
MASKED32(uint32_t word,
	 unsigned start,
	 unsigned stop)
{
  return (word & MASK32(start, stop));
}

INLINE_BITS\
(uint64_t)
MASKED64(uint64_t word,
	 unsigned start,
	 unsigned stop)
{
  return (word & MASK64(start, stop));
}

INLINE_BITS\
(unsigned_word)
MASKED(unsigned_word word,
       unsigned start,
       unsigned stop)
{
  return ((word) & MASK(start, stop));
}



INLINE_BITS\
(unsigned_word)
EXTRACTED(unsigned_word word,
	  unsigned start,
	  unsigned stop)
{
  ASSERT(start <= stop);
#if (WITH_TARGET_WORD_BITSIZE == 64)
  return _EXTRACTEDn(64, word, start, stop);
#else
  if (stop < 32)
    return 0;
  else
    return ((word >> (63 - stop))
	    & MASK(start+(63-stop), 63));
#endif
}


INLINE_BITS\
(unsigned_word)
INSERTED(unsigned_word word,
	 unsigned start,
	 unsigned stop)
{
  ASSERT(start <= stop);
#if (WITH_TARGET_WORD_BITSIZE == 64)
  return _INSERTEDn(64, word, start, stop);
#else
  if (stop < 32)
    return 0;
  else
    return ((word & MASK(start+(63-stop), 63))
	    << (63 - stop));
#endif
}


INLINE_BITS\
(uint32_t)
ROTL32(uint32_t val,
       long shift)
{
  ASSERT(shift >= 0 && shift <= 32);
  return _ROTLn(32, val, shift);
}


INLINE_BITS\
(uint64_t)
ROTL64(uint64_t val,
       long shift)
{
  ASSERT(shift >= 0 && shift <= 64);
  return _ROTLn(64, val, shift);
}

#endif /* _BITS_C_ */