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/*
* Copyright (C) 2011 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 "DFGThunks.h"
#if ENABLE(DFG_JIT)
#include "DFGFPRInfo.h"
#include "DFGGPRInfo.h"
#include "DFGOSRExitCompiler.h"
#include "MacroAssembler.h"
namespace JSC { namespace DFG {
MacroAssemblerCodeRef osrExitGenerationThunkGenerator(JSGlobalData* globalData)
{
MacroAssembler jit;
size_t scratchSize = sizeof(EncodedJSValue) * (GPRInfo::numberOfRegisters + FPRInfo::numberOfRegisters);
ScratchBuffer* scratchBuffer = globalData->scratchBufferForSize(scratchSize);
EncodedJSValue* buffer = static_cast<EncodedJSValue*>(scratchBuffer->dataBuffer());
for (unsigned i = 0; i < GPRInfo::numberOfRegisters; ++i)
jit.storePtr(GPRInfo::toRegister(i), buffer + i);
for (unsigned i = 0; i < FPRInfo::numberOfRegisters; ++i) {
jit.move(MacroAssembler::TrustedImmPtr(buffer + GPRInfo::numberOfRegisters + i), GPRInfo::regT0);
jit.storeDouble(FPRInfo::toRegister(i), GPRInfo::regT0);
}
// Tell GC mark phase how much of the scratch buffer is active during call.
jit.move(MacroAssembler::TrustedImmPtr(scratchBuffer->activeLengthPtr()), GPRInfo::regT0);
jit.storePtr(MacroAssembler::TrustedImmPtr(scratchSize), GPRInfo::regT0);
// Set up one argument.
#if CPU(X86)
jit.poke(GPRInfo::callFrameRegister, 0);
#else
jit.move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR0);
#endif
MacroAssembler::Call functionCall = jit.call();
jit.move(MacroAssembler::TrustedImmPtr(scratchBuffer->activeLengthPtr()), GPRInfo::regT0);
jit.storePtr(MacroAssembler::TrustedImmPtr(0), GPRInfo::regT0);
for (unsigned i = 0; i < FPRInfo::numberOfRegisters; ++i) {
jit.move(MacroAssembler::TrustedImmPtr(buffer + GPRInfo::numberOfRegisters + i), GPRInfo::regT0);
jit.loadDouble(GPRInfo::regT0, FPRInfo::toRegister(i));
}
for (unsigned i = 0; i < GPRInfo::numberOfRegisters; ++i)
jit.loadPtr(buffer + i, GPRInfo::toRegister(i));
jit.jump(MacroAssembler::AbsoluteAddress(&globalData->osrExitJumpDestination));
LinkBuffer patchBuffer(*globalData, &jit, GLOBAL_THUNK_ID);
patchBuffer.link(functionCall, compileOSRExit);
return patchBuffer.finalizeCode();
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
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