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/*
* 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.
*/
#ifndef RegisterAtOffset_h
#define RegisterAtOffset_h
#if ENABLE(JIT)
#include "Reg.h"
#include <wtf/PrintStream.h>
namespace JSC {
class RegisterAtOffset {
public:
RegisterAtOffset()
: m_offset(0)
{
}
RegisterAtOffset(Reg reg, ptrdiff_t offset)
: m_reg(reg)
, m_offset(offset)
{
}
bool operator!() const { return !m_reg; }
Reg reg() const { return m_reg; }
ptrdiff_t offset() const { return m_offset; }
int offsetAsIndex() const { return offset() / sizeof(void*); }
bool operator==(const RegisterAtOffset& other) const
{
return reg() == other.reg() && offset() == other.offset();
}
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:
Reg m_reg;
ptrdiff_t m_offset : sizeof(ptrdiff_t) * 8 - sizeof(Reg) * 8;
};
} // namespace JSC
#endif // ENABLE(JIT)
#endif // RegisterAtOffset_h
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