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/*
* Copyright (C) 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. ``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 "WasmCallingConvention.h"
#if ENABLE(WEBASSEMBLY)
#include <wtf/NeverDestroyed.h>
namespace JSC::Wasm {
const JSCallingConvention& jsCallingConvention()
{
static LazyNeverDestroyed<JSCallingConvention> staticJSCallingConvention;
static std::once_flag staticJSCCallingConventionFlag;
std::call_once(staticJSCCallingConventionFlag, [] () {
RegisterSet callerSaveRegisters = RegisterSet::allRegisters();
callerSaveRegisters.exclude(RegisterSet::calleeSaveRegisters());
staticJSCallingConvention.construct(Vector<Reg>(), Vector<Reg>(), RegisterSet::calleeSaveRegisters(), WTFMove(callerSaveRegisters));
});
return staticJSCallingConvention;
}
const WasmCallingConvention& wasmCallingConvention()
{
static LazyNeverDestroyed<WasmCallingConvention> staticWasmCallingConvention;
static std::once_flag staticWasmCallingConventionFlag;
std::call_once(staticWasmCallingConventionFlag, [] () {
Vector<Reg> gprArgumentRegisters(GPRInfo::numberOfArgumentRegisters);
for (unsigned i = 0; i < GPRInfo::numberOfArgumentRegisters; ++i)
gprArgumentRegisters[i] = GPRInfo::toArgumentRegister(i);
Vector<Reg> fprArgumentRegisters(FPRInfo::numberOfArgumentRegisters);
for (unsigned i = 0; i < FPRInfo::numberOfArgumentRegisters; ++i)
fprArgumentRegisters[i] = FPRInfo::toArgumentRegister(i);
RegisterSet scratch = RegisterSet::allGPRs();
scratch.exclude(RegisterSet::calleeSaveRegisters());
scratch.exclude(RegisterSet::macroScratchRegisters());
scratch.exclude(RegisterSet::reservedHardwareRegisters());
scratch.exclude(RegisterSet::stackRegisters());
for (Reg reg : gprArgumentRegisters)
scratch.clear(reg);
Vector<GPRReg> scratchGPRs;
for (Reg reg : scratch)
scratchGPRs.append(reg.gpr());
RELEASE_ASSERT(scratchGPRs.size() >= 2);
RegisterSet callerSaveRegisters = RegisterSet::allRegisters();
callerSaveRegisters.exclude(RegisterSet::calleeSaveRegisters());
staticWasmCallingConvention.construct(WTFMove(gprArgumentRegisters), WTFMove(fprArgumentRegisters), WTFMove(scratchGPRs), RegisterSet::calleeSaveRegisters(), WTFMove(callerSaveRegisters));
});
return staticWasmCallingConvention;
}
} // namespace JSC::Wasm
#endif // ENABLE(B3_JIT)
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