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
|
/*
* Copyright (C) 2013-2015 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.
*/
#pragma once
#if ENABLE(ASSEMBLER)
#include "Reg.h"
#include "Width.h"
#include <cstddef>
#include <wtf/PrintStream.h>
namespace JSC {
class RegisterAtOffset {
public:
RegisterAtOffset() = default;
RegisterAtOffset(Reg reg, ptrdiff_t offset, Width width)
: m_regIndex(reg.index())
, m_width(width == Width128)
, m_offsetBits((offset >> 2) & 0xFFFFFFFFFFFFFF)
{
ASSERT(!(offset & 0b11));
ASSERT(width == conservativeWidthWithoutVectors(reg) || Options::useWebAssemblySIMD());
ASSERT(reg.index() < (1 << 6));
ASSERT(Reg::last().index() < (1 << 6));
ASSERT(this->reg() == reg);
ASSERT(this->offset() == offset);
ASSERT(this->width() == width);
}
bool operator!() const { return !reg(); }
Reg reg() const { return Reg::fromIndex(m_regIndex); }
ptrdiff_t offset() const { return m_offsetBits << 2; }
size_t byteSize() const { return bytesForWidth(width()); }
Width width() const { return m_width ? conservativeWidth(reg()) : conservativeWidthWithoutVectors(reg()); }
int offsetAsIndex() const { ASSERT(!(offset() % sizeof(CPURegister))); return offset() / static_cast<int>(sizeof(CPURegister)); }
bool operator==(const RegisterAtOffset& other) const
{
return reg() == other.reg() && offset() == other.offset() && width() == other.width();
}
bool operator<(const RegisterAtOffset& other) const
{
if (reg() != other.reg())
return reg() < other.reg();
return offset() < other.offset();
}
static Reg getReg(RegisterAtOffset* value) { return value->reg(); }
void dump(PrintStream& out) const;
private:
unsigned m_regIndex : 7 = Reg().index();
bool m_width : 1 = false;
ptrdiff_t m_offsetBits : (sizeof(ptrdiff_t) * CHAR_BIT - 7 - 1) = 0;
};
} // namespace JSC
#endif // ENABLE(ASSEMBLER)
|
