140 lines
3.5 KiB
C++
140 lines
3.5 KiB
C++
/*
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* Copyright (C) 2015-2018 Apple Inc. All rights reserved.
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* Copyright (C) 2021 Igalia S.L. 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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#pragma once
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#if ENABLE(WEBASSEMBLY)
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#include "FPRInfo.h"
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#include "GPRInfo.h"
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#include "Reg.h"
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#include <wtf/PrintStream.h>
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namespace JSC {
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namespace Wasm {
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class ValueLocation {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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enum Kind : uint8_t {
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Register,
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Stack,
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StackArgument,
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};
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ValueLocation()
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: m_kind(Register)
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{
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}
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explicit ValueLocation(Reg reg)
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: m_kind(Register)
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{
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u.reg = reg;
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}
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ValueLocation(const ValueLocation&) = default;
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static ValueLocation reg(Reg reg)
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{
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return ValueLocation(reg);
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}
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static ValueLocation stack(intptr_t offsetFromFP)
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{
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ValueLocation result;
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result.m_kind = Stack;
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result.u.offsetFromFP = offsetFromFP;
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return result;
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}
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static ValueLocation stackArgument(intptr_t offsetFromSP)
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{
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ValueLocation result;
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result.m_kind = StackArgument;
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result.u.offsetFromSP = offsetFromSP;
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return result;
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}
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Kind kind() const { return m_kind; }
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bool isReg() const { return kind() == Register; }
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Reg reg() const
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{
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ASSERT(isReg());
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return u.reg;
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}
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bool isGPR() const { return isReg() && reg().isGPR(); }
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bool isFPR() const { return isReg() && reg().isFPR(); }
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GPRReg gpr() const { return reg().gpr(); }
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FPRReg fpr() const { return reg().fpr(); }
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bool isStack() const { return kind() == Stack; }
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intptr_t offsetFromFP() const
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{
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ASSERT(isStack());
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return u.offsetFromFP;
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}
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bool isStackArgument() const { return kind() == StackArgument; }
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intptr_t offsetFromSP() const
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{
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ASSERT(isStackArgument());
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return u.offsetFromSP;
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}
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JS_EXPORT_PRIVATE void dump(PrintStream&) const;
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private:
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union U {
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Reg reg;
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intptr_t offsetFromFP;
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intptr_t offsetFromSP;
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U()
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{
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memset(static_cast<void*>(this), 0, sizeof(*this));
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}
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} u;
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Kind m_kind;
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};
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} } // namespace JSC::Wasm
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namespace WTF {
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void printInternal(PrintStream&, JSC::Wasm::ValueLocation::Kind);
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} // namespace WTF
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#endif // ENABLE(WEBASSEMBLY)
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