1/*
2 * Copyright (C) 2015-2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "RegisterAtOffsetList.h"
28
29#if ENABLE(ASSEMBLER)
30
31#include <wtf/ListDump.h>
32
33namespace JSC {
34
35RegisterAtOffsetList::RegisterAtOffsetList() { }
36
37RegisterAtOffsetList::RegisterAtOffsetList(RegisterSet registerSet, OffsetBaseType offsetBaseType)
38{
39 size_t numberOfRegisters = registerSet.numberOfSetRegisters();
40 ptrdiff_t offset = 0;
41
42 if (offsetBaseType == FramePointerBased)
43 offset = -(static_cast<ptrdiff_t>(numberOfRegisters) * sizeof(CPURegister));
44
45 m_registers.reserveInitialCapacity(numberOfRegisters);
46 registerSet.forEach([&] (Reg reg) {
47 m_registers.append(RegisterAtOffset(reg, offset));
48 offset += sizeof(CPURegister);
49 });
50}
51
52void RegisterAtOffsetList::dump(PrintStream& out) const
53{
54 out.print(listDump(m_registers));
55}
56
57RegisterAtOffset* RegisterAtOffsetList::find(Reg reg) const
58{
59 return tryBinarySearch<RegisterAtOffset, Reg>(m_registers, m_registers.size(), reg, RegisterAtOffset::getReg);
60}
61
62unsigned RegisterAtOffsetList::indexOf(Reg reg) const
63{
64 if (RegisterAtOffset* pointer = find(reg))
65 return pointer - m_registers.begin();
66 return UINT_MAX;
67}
68
69const RegisterAtOffsetList& RegisterAtOffsetList::llintBaselineCalleeSaveRegisters()
70{
71 static std::once_flag onceKey;
72 static LazyNeverDestroyed<RegisterAtOffsetList> result;
73 std::call_once(onceKey, [] {
74 result.construct(RegisterSet::llintBaselineCalleeSaveRegisters());
75 });
76 return result.get();
77}
78
79} // namespace JSC
80
81#endif // ENABLE(ASSEMBLER)
82
83