mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
87 lines
3.7 KiB
C++
87 lines
3.7 KiB
C++
/*
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* Copyright (C) 2016 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "WasmCallingConvention.h"
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#if ENABLE(WEBASSEMBLY)
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#include <wtf/NeverDestroyed.h>
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namespace JSC::Wasm {
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const JSCallingConvention& jsCallingConvention()
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{
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static LazyNeverDestroyed<JSCallingConvention> staticJSCallingConvention;
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static std::once_flag staticJSCCallingConventionFlag;
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std::call_once(staticJSCCallingConventionFlag, [] () {
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RegisterSet callerSaveRegisters = RegisterSet::allRegisters();
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callerSaveRegisters.exclude(RegisterSet::calleeSaveRegisters());
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staticJSCallingConvention.construct(Vector<Reg>(), Vector<Reg>(), RegisterSet::calleeSaveRegisters(), WTFMove(callerSaveRegisters));
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});
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return staticJSCallingConvention;
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}
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const WasmCallingConvention& wasmCallingConvention()
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{
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static LazyNeverDestroyed<WasmCallingConvention> staticWasmCallingConvention;
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static std::once_flag staticWasmCallingConventionFlag;
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std::call_once(staticWasmCallingConventionFlag, [] () {
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Vector<Reg> gprArgumentRegisters(GPRInfo::numberOfArgumentRegisters);
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for (unsigned i = 0; i < GPRInfo::numberOfArgumentRegisters; ++i)
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gprArgumentRegisters[i] = GPRInfo::toArgumentRegister(i);
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Vector<Reg> fprArgumentRegisters(FPRInfo::numberOfArgumentRegisters);
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for (unsigned i = 0; i < FPRInfo::numberOfArgumentRegisters; ++i)
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fprArgumentRegisters[i] = FPRInfo::toArgumentRegister(i);
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RegisterSet scratch = RegisterSet::allGPRs();
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scratch.exclude(RegisterSet::calleeSaveRegisters());
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scratch.exclude(RegisterSet::macroScratchRegisters());
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scratch.exclude(RegisterSet::reservedHardwareRegisters());
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scratch.exclude(RegisterSet::stackRegisters());
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for (Reg reg : gprArgumentRegisters)
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scratch.clear(reg);
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Vector<GPRReg> scratchGPRs;
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for (Reg reg : scratch)
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scratchGPRs.append(reg.gpr());
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RELEASE_ASSERT(scratchGPRs.size() >= 2);
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RegisterSet callerSaveRegisters = RegisterSet::allRegisters();
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callerSaveRegisters.exclude(RegisterSet::calleeSaveRegisters());
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staticWasmCallingConvention.construct(WTFMove(gprArgumentRegisters), WTFMove(fprArgumentRegisters), WTFMove(scratchGPRs), RegisterSet::calleeSaveRegisters(), WTFMove(callerSaveRegisters));
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});
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return staticWasmCallingConvention;
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}
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} // namespace JSC::Wasm
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#endif // ENABLE(B3_JIT)
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