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/*
* Copyright (C) 2010, 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. AND ITS CONTRIBUTORS ``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 ITS 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
#include "BytecodeConventions.h"
#include "CCallHelpers.h"
#include "FPRInfo.h"
#include "GPRInfo.h"
#include "JSCJSValue.h"
#include "JSString.h"
#include "MacroAssembler.h"
#if ENABLE(JIT)
namespace JSC {
class JSInterfaceJIT : public CCallHelpers, public GPRInfo, public FPRInfo {
public:
JSInterfaceJIT(VM* vm = nullptr, CodeBlock* codeBlock = nullptr)
: CCallHelpers(codeBlock)
, m_vm(vm)
{
}
inline Jump emitLoadJSCell(unsigned virtualRegisterIndex, RegisterID payload);
inline Jump emitLoadInt32(unsigned virtualRegisterIndex, RegisterID dst);
inline Jump emitLoadDouble(unsigned virtualRegisterIndex, FPRegisterID dst, RegisterID scratch);
#if USE(JSVALUE32_64)
inline Jump emitJumpIfNotJSCell(unsigned virtualRegisterIndex);
#endif
void emitGetFromCallFrameHeaderPtr(int entry, RegisterID to, RegisterID from = callFrameRegister);
void emitPutToCallFrameHeader(RegisterID from, int entry);
void emitPutToCallFrameHeader(void* value, int entry);
void emitPutCellToCallFrameHeader(RegisterID from, int entry);
VM* vm() const { return m_vm; }
VM* m_vm;
};
#if USE(JSVALUE32_64)
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadJSCell(unsigned virtualRegisterIndex, RegisterID payload)
{
loadPtr(payloadFor(virtualRegisterIndex), payload);
return emitJumpIfNotJSCell(virtualRegisterIndex);
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitJumpIfNotJSCell(unsigned virtualRegisterIndex)
{
ASSERT(static_cast<int>(virtualRegisterIndex) < FirstConstantRegisterIndex);
return branch32(NotEqual, tagFor(virtualRegisterIndex), TrustedImm32(JSValue::CellTag));
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadInt32(unsigned virtualRegisterIndex, RegisterID dst)
{
ASSERT(static_cast<int>(virtualRegisterIndex) < FirstConstantRegisterIndex);
loadPtr(payloadFor(virtualRegisterIndex), dst);
return branch32(NotEqual, tagFor(static_cast<int>(virtualRegisterIndex)), TrustedImm32(JSValue::Int32Tag));
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadDouble(unsigned virtualRegisterIndex, FPRegisterID dst, RegisterID scratch)
{
ASSERT(static_cast<int>(virtualRegisterIndex) < FirstConstantRegisterIndex);
loadPtr(tagFor(virtualRegisterIndex), scratch);
Jump isDouble = branch32(Below, scratch, TrustedImm32(JSValue::LowestTag));
Jump notInt = branch32(NotEqual, scratch, TrustedImm32(JSValue::Int32Tag));
loadPtr(payloadFor(virtualRegisterIndex), scratch);
convertInt32ToDouble(scratch, dst);
Jump done = jump();
isDouble.link(this);
loadDouble(addressFor(virtualRegisterIndex), dst);
done.link(this);
return notInt;
}
#endif
#if USE(JSVALUE64)
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadJSCell(unsigned virtualRegisterIndex, RegisterID dst)
{
load64(addressFor(virtualRegisterIndex), dst);
return branchIfNotCell(dst);
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadInt32(unsigned virtualRegisterIndex, RegisterID dst)
{
load64(addressFor(virtualRegisterIndex), dst);
Jump notInt32 = branchIfNotInt32(dst);
zeroExtend32ToPtr(dst, dst);
return notInt32;
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadDouble(unsigned virtualRegisterIndex, FPRegisterID dst, RegisterID scratch)
{
load64(addressFor(virtualRegisterIndex), scratch);
Jump notNumber = branchIfNotNumber(scratch);
Jump notInt = branchIfNotInt32(scratch);
convertInt32ToDouble(scratch, dst);
Jump done = jump();
notInt.link(this);
unboxDouble(scratch, scratch, dst);
done.link(this);
return notNumber;
}
#endif
ALWAYS_INLINE void JSInterfaceJIT::emitGetFromCallFrameHeaderPtr(int entry, RegisterID to, RegisterID from)
{
loadPtr(Address(from, entry * sizeof(Register)), to);
}
ALWAYS_INLINE void JSInterfaceJIT::emitPutToCallFrameHeader(RegisterID from, int entry)
{
#if USE(JSVALUE32_64)
storePtr(from, payloadFor(entry));
#else
store64(from, addressFor(entry));
#endif
}
ALWAYS_INLINE void JSInterfaceJIT::emitPutToCallFrameHeader(void* value, int entry)
{
storePtr(TrustedImmPtr(value), addressFor(entry));
}
ALWAYS_INLINE void JSInterfaceJIT::emitPutCellToCallFrameHeader(RegisterID from, int entry)
{
#if USE(JSVALUE32_64)
store32(TrustedImm32(JSValue::CellTag), tagFor(entry));
store32(from, payloadFor(entry));
#else
store64(from, addressFor(entry));
#endif
}
} // namespace JSC
#endif // ENABLE(JIT)