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/*
* Copyright (C) 2012 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.
*/
#ifndef DFGDoubleFormatState_h
#define DFGDoubleFormatState_h
namespace JSC { namespace DFG {
enum DoubleFormatState {
EmptyDoubleFormatState, // bottom
UsingDoubleFormat,
NotUsingDoubleFormat,
CantUseDoubleFormat // top
};
inline DoubleFormatState mergeDoubleFormatStates(DoubleFormatState a, DoubleFormatState b)
{
switch (a) {
case EmptyDoubleFormatState:
return b;
case UsingDoubleFormat:
switch (b) {
case EmptyDoubleFormatState:
case UsingDoubleFormat:
return UsingDoubleFormat;
case NotUsingDoubleFormat:
case CantUseDoubleFormat:
return CantUseDoubleFormat;
}
case NotUsingDoubleFormat:
switch (b) {
case EmptyDoubleFormatState:
case NotUsingDoubleFormat:
return NotUsingDoubleFormat;
case UsingDoubleFormat:
case CantUseDoubleFormat:
return CantUseDoubleFormat;
}
case CantUseDoubleFormat:
return CantUseDoubleFormat;
}
RELEASE_ASSERT_NOT_REACHED();
return CantUseDoubleFormat;
}
inline bool mergeDoubleFormatState(DoubleFormatState& dest, DoubleFormatState src)
{
DoubleFormatState newState = mergeDoubleFormatStates(dest, src);
if (newState == dest)
return false;
dest = newState;
return true;
}
inline const char* doubleFormatStateToString(DoubleFormatState state)
{
switch (state) {
case EmptyDoubleFormatState:
return "Empty";
case UsingDoubleFormat:
return "DoubleFormat";
case NotUsingDoubleFormat:
return "ValueFormat";
case CantUseDoubleFormat:
return "ForceValue";
}
RELEASE_ASSERT_NOT_REACHED();
return 0;
}
} } // namespace JSC::DFG
#endif // DFGDoubleFormatState_h
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