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/*
* Copyright (C) 2014 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 FloatingPointEnvironment_h
#define FloatingPointEnvironment_h
#import <fenv.h>
namespace WebCore {
#if PLATFORM(IOS_FAMILY) && (CPU(ARM) || CPU(ARM64))
class FloatingPointEnvironment {
public:
FloatingPointEnvironment();
WEBCORE_EXPORT void enableDenormalSupport();
WEBCORE_EXPORT void saveMainThreadEnvironment();
void propagateMainThreadEnvironment();
WEBCORE_EXPORT static FloatingPointEnvironment& singleton();
private:
fenv_t m_mainThreadEnvironment;
bool m_isInitialized;
};
#else // not PLATFORM(IOS_FAMILY) && (CPU(ARM) || CPU(ARM64))
class FloatingPointEnvironment {
public:
FloatingPointEnvironment() = default;
void enableDenormalSupport() { }
void saveMainThreadEnvironment() { }
void propagateMainThreadEnvironment() { }
WEBCORE_EXPORT static FloatingPointEnvironment& singleton();
};
#endif // PLATFORM(IOS_FAMILY) && (CPU(ARM) || CPU(ARM64))
} // namespace WebCore
using WebCore::FloatingPointEnvironment;
#endif // FloatingPointEnvironment_h