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/*
* Copyright (C) 2015-2016 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.
*/
#include "config.h"
#include "RegisterAtOffsetList.h"
#if ENABLE(ASSEMBLER)
#include <wtf/ListDump.h>
namespace JSC {
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(RegisterAtOffsetList);
RegisterAtOffsetList::RegisterAtOffsetList() { }
RegisterAtOffsetList::RegisterAtOffsetList(RegisterSet registerSetBuilder, OffsetBaseType offsetBaseType)
: m_registers(registerSetBuilder.numberOfSetRegisters())
{
ASSERT(!registerSetBuilder.hasAnyWideRegisters() || Options::useWasmSIMD());
size_t sizeOfAreaInBytes = registerSetBuilder.byteSizeOfSetRegisters();
m_sizeOfAreaInBytes = sizeOfAreaInBytes;
#if USE(JSVALUE64)
static_assert(sizeof(CPURegister) == sizeof(double));
ASSERT(this->sizeOfAreaInBytes() == registerCount() * sizeof(CPURegister) || Options::useWasmSIMD());
#endif
ptrdiff_t startOffset = 0;
if (offsetBaseType == FramePointerBased)
startOffset = -static_cast<ptrdiff_t>(sizeOfAreaInBytes);
ptrdiff_t offset = startOffset;
unsigned index = 0;
registerSetBuilder.forEachWithWidth([&] (Reg reg, Width width) {
offset = WTF::roundUpToMultipleOf(alignmentForWidth(width), offset);
m_registers[index++] = RegisterAtOffset(reg, offset, width);
offset += bytesForWidth(width);
});
ASSERT(static_cast<size_t>(offset - startOffset) == sizeOfAreaInBytes);
}
void RegisterAtOffsetList::dump(PrintStream& out) const
{
out.print(listDump(m_registers));
}
RegisterAtOffset* RegisterAtOffsetList::find(Reg reg) const
{
return tryBinarySearch<RegisterAtOffset, Reg>(m_registers, m_registers.size(), reg, RegisterAtOffset::getReg);
}
unsigned RegisterAtOffsetList::indexOf(Reg reg) const
{
if (RegisterAtOffset* pointer = find(reg))
return pointer - m_registers.begin();
return UINT_MAX;
}
const RegisterAtOffsetList& RegisterAtOffsetList::llintBaselineCalleeSaveRegisters()
{
static std::once_flag onceKey;
static LazyNeverDestroyed<RegisterAtOffsetList> result;
std::call_once(onceKey, [] {
result.construct(RegisterSetBuilder::llintBaselineCalleeSaveRegisters());
});
return result.get();
}
const RegisterAtOffsetList& RegisterAtOffsetList::dfgCalleeSaveRegisters()
{
static std::once_flag onceKey;
static LazyNeverDestroyed<RegisterAtOffsetList> result;
std::call_once(onceKey, [] {
result.construct(RegisterSetBuilder::dfgCalleeSaveRegisters());
});
return result.get();
}
} // namespace JSC
#endif // ENABLE(ASSEMBLER)
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