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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.
*/
#pragma once
#if ENABLE(ASSEMBLER)
#include "RegisterAtOffset.h"
#include "RegisterSet.h"
#include <wtf/FixedVector.h>
namespace JSC {
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(RegisterAtOffsetList);
class RegisterAtOffsetList {
WTF_MAKE_STRUCT_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(RegisterAtOffsetList);
public:
enum OffsetBaseType { FramePointerBased, ZeroBased };
RegisterAtOffsetList();
explicit RegisterAtOffsetList(RegisterSet, OffsetBaseType = FramePointerBased);
void dump(PrintStream&) const;
size_t registerCount() const { return m_registers.size(); }
size_t sizeOfAreaInBytes() const
{
#if USE(JSVALUE64)
static_assert(sizeof(CPURegister) == sizeof(double));
return registerCount() * sizeof(CPURegister);
#elif USE(JSVALUE32_64)
return m_sizeOfAreaInBytes;
#endif
}
const RegisterAtOffset& at(size_t index) const
{
return m_registers.at(index);
}
void adjustOffsets(ptrdiff_t addend)
{
// This preserves m_sizeOfAreaInBytes
for (RegisterAtOffset &item : m_registers)
item = RegisterAtOffset { item.reg(), item.offset() + addend };
}
RegisterAtOffset* find(Reg) const;
unsigned indexOf(Reg) const; // Returns UINT_MAX if not found.
FixedVector<RegisterAtOffset>::const_iterator begin() const { return m_registers.begin(); }
FixedVector<RegisterAtOffset>::const_iterator end() const { return m_registers.end(); }
static const RegisterAtOffsetList& llintBaselineCalleeSaveRegisters(); // Registers and Offsets saved and used by the LLInt.
static const RegisterAtOffsetList& dfgCalleeSaveRegisters(); // Registers and Offsets saved and used by DFG.
private:
FixedVector<RegisterAtOffset> m_registers;
#if USE(JSVALUE32_64) // On JSVALUE64, we can compute this cheaply
size_t m_sizeOfAreaInBytes { 0 };
#endif
};
} // namespace JSC
#endif // ENABLE(ASSEMBLER)
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