mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
112 lines
3.2 KiB
C++
112 lines
3.2 KiB
C++
/*
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* Copyright (C) 2015 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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#pragma once
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#if ENABLE(JIT)
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#include "ResultType.h"
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#include <wtf/Packed.h>
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namespace JSC {
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class SnippetOperand {
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enum ConstOrVarType : uint8_t {
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Variable,
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ConstInt32,
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ConstDouble
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};
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public:
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SnippetOperand()
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: m_resultType(ResultType::unknownType())
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{ }
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SnippetOperand(ResultType resultType)
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: m_resultType(resultType)
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{ }
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bool mightBeNumber() const { return m_resultType.mightBeNumber(); }
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bool definitelyIsNumber() const { return m_resultType.definitelyIsNumber(); }
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bool isConst() const { return m_type != Variable; }
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bool isConstInt32() const { return m_type == ConstInt32; }
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bool isConstDouble() const { return m_type == ConstDouble; }
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bool isPositiveConstInt32() const { return isConstInt32() && asConstInt32() > 0; }
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int64_t asRawBits() const { return m_val.get().rawBits; }
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int32_t asConstInt32() const
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{
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ASSERT(m_type == ConstInt32);
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return m_val.get().int32Val;
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}
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double asConstDouble() const
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{
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ASSERT(m_type == ConstDouble);
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return m_val.get().doubleVal;
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}
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double asConstNumber() const
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{
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if (isConstInt32())
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return asConstInt32();
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ASSERT(isConstDouble());
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return asConstDouble();
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}
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void setConstInt32(int32_t value)
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{
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m_type = ConstInt32;
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UnionType u;
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u.int32Val = value;
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m_val = WTFMove(u);
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}
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void setConstDouble(double value)
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{
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m_type = ConstDouble;
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UnionType u;
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u.doubleVal = value;
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m_val = WTFMove(u);
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}
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private:
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ResultType m_resultType;
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ConstOrVarType m_type { Variable };
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union UnionType {
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int32_t int32Val;
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double doubleVal;
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int64_t rawBits;
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};
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Packed<UnionType> m_val;
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};
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static_assert(alignof(SnippetOperand) == 1);
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} // namespace JSC
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#endif // ENABLE(JIT)
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