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
|
/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef B3Common_h
#define B3Common_h
#if ENABLE(B3_JIT)
namespace JSC { namespace B3 {
inline bool is64Bit() { return sizeof(void*) == 8; }
inline bool is32Bit() { return !is64Bit(); }
enum B3ComplitationMode {
B3Mode,
AirMode
};
bool shouldDumpIR(B3ComplitationMode);
bool shouldDumpIRAtEachPhase(B3ComplitationMode);
bool shouldValidateIR();
bool shouldValidateIRAtEachPhase();
bool shouldSaveIRBeforePhase();
bool shouldMeasurePhaseTiming();
template<typename BitsType, typename InputType>
inline bool isIdentical(InputType left, InputType right)
{
BitsType leftBits = bitwise_cast<BitsType>(left);
BitsType rightBits = bitwise_cast<BitsType>(right);
return leftBits == rightBits;
}
inline bool isIdentical(int32_t left, int32_t right)
{
return isIdentical<int32_t>(left, right);
}
inline bool isIdentical(int64_t left, int64_t right)
{
return isIdentical<int64_t>(left, right);
}
inline bool isIdentical(double left, double right)
{
return isIdentical<int64_t>(left, right);
}
template<typename ResultType, typename InputType, typename BitsType>
inline bool isRepresentableAsImpl(InputType originalValue)
{
// Convert the original value to the desired result type.
ResultType result = static_cast<ResultType>(originalValue);
// Convert the converted value back to the original type. The original value is representable
// using the new type if such round-tripping doesn't lose bits.
InputType newValue = static_cast<InputType>(result);
return isIdentical<BitsType>(originalValue, newValue);
}
template<typename ResultType>
inline bool isRepresentableAs(int32_t value)
{
return isRepresentableAsImpl<ResultType, int32_t, int32_t>(value);
}
template<typename ResultType>
inline bool isRepresentableAs(int64_t value)
{
return isRepresentableAsImpl<ResultType, int64_t, int64_t>(value);
}
template<typename ResultType>
inline bool isRepresentableAs(double value)
{
return isRepresentableAsImpl<ResultType, double, int64_t>(value);
}
template<typename IntType>
static IntType chillDiv(IntType numerator, IntType denominator)
{
if (!denominator)
return 0;
if (denominator == -1 && numerator == std::numeric_limits<IntType>::min())
return std::numeric_limits<IntType>::min();
return numerator / denominator;
}
template<typename IntType>
static IntType chillMod(IntType numerator, IntType denominator)
{
if (!denominator)
return 0;
if (denominator == -1 && numerator == std::numeric_limits<IntType>::min())
return 0;
return numerator % denominator;
}
} } // namespace JSC::B3
#endif // ENABLE(B3_JIT)
#endif // B3Common_h
|
