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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.
*/
#include "config.h"
#include "FTLLocation.h"
#if ENABLE(FTL_JIT)
#include "B3ValueRep.h"
#include "FTLSaveRestore.h"
#include "RegisterSet.h"
#include <wtf/DataLog.h>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC { namespace FTL {
using namespace B3;
Location Location::forValueRep(const ValueRep& rep)
{
switch (rep.kind()) {
case ValueRep::Register:
return forRegister(rep.reg(), 0);
case ValueRep::Stack:
return forIndirect(GPRInfo::callFrameRegister, rep.offsetFromFP());
case ValueRep::Constant:
return forConstant(rep.value());
default:
RELEASE_ASSERT_NOT_REACHED();
return Location();
}
}
void Location::dump(PrintStream& out) const
{
out.print("(", kind());
if (hasReg())
out.print(", ", reg());
if (hasOffset())
out.print(", ", offset());
if (hasAddend())
out.print(", ", addend());
if (hasConstant())
out.print(", ", constant());
out.print(")");
}
bool Location::involvesGPR() const
{
return isGPR() || kind() == Indirect;
}
bool Location::isGPR() const
{
return kind() == Register && reg().isGPR();
}
GPRReg Location::gpr() const
{
return reg().gpr();
}
bool Location::isFPR() const
{
return kind() == Register && reg().isFPR();
}
FPRReg Location::fpr() const
{
return reg().fpr();
}
void Location::restoreInto(MacroAssembler& jit, char* savedRegisters, GPRReg result, unsigned numFramesToPop) const
{
if (involvesGPR() && RegisterSetBuilder::stackRegisters().contains(gpr(), IgnoreVectors)) {
// Make the result GPR contain the appropriate stack register.
if (numFramesToPop) {
jit.move(MacroAssembler::framePointerRegister, result);
for (unsigned i = numFramesToPop - 1; i--;)
jit.loadPtr(MacroAssembler::Address(result), result);
if (gpr() == MacroAssembler::framePointerRegister)
jit.loadPtr(MacroAssembler::Address(result), result);
else
jit.addPtr(MacroAssembler::TrustedImmPtr(sizeof(void*) * 2), result);
} else
jit.move(gpr(), result);
}
if (isGPR()) {
if (RegisterSetBuilder::stackRegisters().contains(gpr(), IgnoreVectors)) {
// Already restored into result.
} else
jit.load64(savedRegisters + offsetOfGPR(gpr()), result);
if (addend())
jit.add64(MacroAssembler::TrustedImm32(addend()), result);
return;
}
if (isFPR()) {
jit.load64(savedRegisters + offsetOfFPR(fpr()), result);
ASSERT(!addend());
return;
}
switch (kind()) {
case Register:
// B3 used some register that we don't know about!
dataLogLn("Unrecognized location: ", *this);
RELEASE_ASSERT_NOT_REACHED();
return;
case Indirect:
if (RegisterSetBuilder::stackRegisters().contains(gpr(), IgnoreVectors)) {
// The stack register is already recovered into result.
jit.load64(MacroAssembler::Address(result, offset()), result);
return;
}
jit.load64(savedRegisters + offsetOfGPR(gpr()), result);
jit.load64(MacroAssembler::Address(result, offset()), result);
return;
case Constant:
jit.move(MacroAssembler::TrustedImm64(constant()), result);
return;
case Unprocessed:
RELEASE_ASSERT_NOT_REACHED();
return;
}
RELEASE_ASSERT_NOT_REACHED();
}
GPRReg Location::directGPR() const
{
RELEASE_ASSERT(!addend());
return gpr();
}
} } // namespace JSC::FTL
namespace WTF {
using namespace JSC::FTL;
void printInternal(PrintStream& out, JSC::FTL::Location::Kind kind)
{
switch (kind) {
case Location::Unprocessed:
out.print("Unprocessed");
return;
case Location::Register:
out.print("Register");
return;
case Location::Indirect:
out.print("Indirect");
return;
case Location::Constant:
out.print("Constant");
return;
}
RELEASE_ASSERT_NOT_REACHED();
}
} // namespace WTF
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
#endif // ENABLE(FTL_JIT)
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