mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
/*
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* Copyright (C) 2019 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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#include "VirtualRegister.h"
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#include <wtf/PrintStream.h>
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namespace JSC {
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class SymbolTableOrScopeDepth {
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public:
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SymbolTableOrScopeDepth() = default;
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static SymbolTableOrScopeDepth symbolTable(VirtualRegister reg)
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{
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ASSERT(reg.isConstant());
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return SymbolTableOrScopeDepth(reg.offset() - FirstConstantRegisterIndex);
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}
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static SymbolTableOrScopeDepth scopeDepth(unsigned scopeDepth)
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{
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return SymbolTableOrScopeDepth(scopeDepth);
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}
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static SymbolTableOrScopeDepth raw(unsigned value)
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{
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return SymbolTableOrScopeDepth(value);
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}
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VirtualRegister symbolTable() const
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{
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return VirtualRegister(m_raw + FirstConstantRegisterIndex);
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}
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unsigned scopeDepth() const
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{
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return m_raw;
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}
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unsigned raw() const { return m_raw; }
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void dump(PrintStream& out) const
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{
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out.print(m_raw);
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}
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private:
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SymbolTableOrScopeDepth(unsigned value)
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: m_raw(value)
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{ }
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unsigned m_raw { 0 };
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};
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} // namespace JSC
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