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/*
* Copyright (C) 2010-2022 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"
#include <wtf/TZoneMalloc.h>
#if ENABLE(JIT)
namespace JSC {
class JSInterfaceJIT : public CCallHelpers, public GPRInfo, public JSRInfo, public FPRInfo {
WTF_MAKE_TZONE_NON_HEAP_ALLOCATABLE(JSInterfaceJIT);
public:
JSInterfaceJIT(VM* vm = nullptr, CodeBlock* codeBlock = nullptr)
: CCallHelpers(codeBlock)
, m_vm(vm)
{
}
inline Jump emitLoadJSCell(VirtualRegister, RegisterID payload);
inline Jump emitLoadInt32(VirtualRegister, RegisterID dst);
inline Jump emitLoadDouble(VirtualRegister, FPRegisterID dst, RegisterID scratch);
inline void emitLoadJSValue(VirtualRegister, JSValueRegs dst);
VM* vm() const { return m_vm; }
VM* const m_vm;
};
#if USE(JSVALUE32_64)
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadJSCell(VirtualRegister virtualRegister, RegisterID payload)
{
ASSERT(virtualRegister < VirtualRegister(FirstConstantRegisterIndex));
loadPtr(payloadFor(virtualRegister), payload);
return branchIfNotCell(tagFor(virtualRegister));
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadInt32(VirtualRegister virtualRegister, RegisterID dst)
{
ASSERT(virtualRegister < VirtualRegister(FirstConstantRegisterIndex));
loadPtr(payloadFor(virtualRegister), dst);
return branch32(NotEqual, tagFor(virtualRegister), TrustedImm32(JSValue::Int32Tag));
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadDouble(VirtualRegister virtualRegister, FPRegisterID dst, RegisterID scratch)
{
ASSERT(virtualRegister < VirtualRegister(FirstConstantRegisterIndex));
loadPtr(tagFor(virtualRegister), scratch);
Jump isDouble = branch32(Below, scratch, TrustedImm32(JSValue::LowestTag));
Jump notInt = branch32(NotEqual, scratch, TrustedImm32(JSValue::Int32Tag));
loadPtr(payloadFor(virtualRegister), scratch);
convertInt32ToDouble(scratch, dst);
Jump done = jump();
isDouble.link(this);
loadDouble(addressFor(virtualRegister), dst);
done.link(this);
return notInt;
}
#elif USE(JSVALUE64)
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadJSCell(VirtualRegister virtualRegister, RegisterID dst)
{
load64(addressFor(virtualRegister), dst);
return branchIfNotCell(dst);
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadInt32(VirtualRegister virtualRegister, RegisterID dst)
{
load64(addressFor(virtualRegister), dst);
Jump notInt32 = branchIfNotInt32(dst);
zeroExtend32ToWord(dst, dst);
return notInt32;
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadDouble(VirtualRegister virtualRegister, FPRegisterID dst, RegisterID scratch)
{
load64(addressFor(virtualRegister), 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
inline void JSInterfaceJIT::emitLoadJSValue(VirtualRegister virtualRegister, JSValueRegs dst)
{
loadValue(addressFor(virtualRegister), dst);
}
} // namespace JSC
#endif // ENABLE(JIT)
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