mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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95 lines
3.0 KiB
C++
95 lines
3.0 KiB
C++
/*
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* Copyright (C) 2012 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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namespace JSC { namespace DFG {
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enum DoubleFormatState {
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EmptyDoubleFormatState, // bottom
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UsingDoubleFormat,
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NotUsingDoubleFormat,
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CantUseDoubleFormat // top
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};
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inline DoubleFormatState mergeDoubleFormatStates(DoubleFormatState a, DoubleFormatState b)
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{
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switch (a) {
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case EmptyDoubleFormatState:
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return b;
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case UsingDoubleFormat:
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switch (b) {
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case EmptyDoubleFormatState:
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case UsingDoubleFormat:
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return UsingDoubleFormat;
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case NotUsingDoubleFormat:
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case CantUseDoubleFormat:
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return CantUseDoubleFormat;
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}
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RELEASE_ASSERT_NOT_REACHED();
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case NotUsingDoubleFormat:
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switch (b) {
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case EmptyDoubleFormatState:
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case NotUsingDoubleFormat:
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return NotUsingDoubleFormat;
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case UsingDoubleFormat:
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case CantUseDoubleFormat:
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return CantUseDoubleFormat;
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}
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RELEASE_ASSERT_NOT_REACHED();
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case CantUseDoubleFormat:
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return CantUseDoubleFormat;
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}
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RELEASE_ASSERT_NOT_REACHED();
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return CantUseDoubleFormat;
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}
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inline bool mergeDoubleFormatState(DoubleFormatState& dest, DoubleFormatState src)
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{
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DoubleFormatState newState = mergeDoubleFormatStates(dest, src);
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if (newState == dest)
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return false;
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dest = newState;
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return true;
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}
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inline const char* doubleFormatStateToString(DoubleFormatState state)
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{
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switch (state) {
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case EmptyDoubleFormatState:
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return "Empty";
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case UsingDoubleFormat:
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return "DoubleFormat";
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case NotUsingDoubleFormat:
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return "ValueFormat";
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case CantUseDoubleFormat:
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return "ForceValue";
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}
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RELEASE_ASSERT_NOT_REACHED();
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return nullptr;
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}
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} } // namespace JSC::DFG
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