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79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
/*
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* Copyright (C) 2013 Google 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 are
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* met:
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*
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* * 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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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY 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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#ifndef SKY_ENGINE_WTF_BYTESWAP_H_
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#define SKY_ENGINE_WTF_BYTESWAP_H_
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#include "flutter/sky/engine/wtf/CPU.h"
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#include "flutter/sky/engine/wtf/Compiler.h"
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#include <stdint.h>
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namespace WTF {
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inline uint32_t wswap32(uint32_t x) {
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return ((x & 0xffff0000) >> 16) | ((x & 0x0000ffff) << 16);
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}
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ALWAYS_INLINE uint64_t bswap64(uint64_t x) {
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return __builtin_bswap64(x);
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}
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ALWAYS_INLINE uint32_t bswap32(uint32_t x) {
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return __builtin_bswap32(x);
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}
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// GCC 4.6 lacks __builtin_bswap16. Newer versions have it but we support 4.6.
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#if COMPILER(CLANG)
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ALWAYS_INLINE uint16_t bswap16(uint16_t x) {
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return __builtin_bswap16(x);
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}
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#else
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inline uint16_t bswap16(uint16_t x) {
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return ((x & 0xff00) >> 8) | ((x & 0x00ff) << 8);
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}
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#endif
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#if CPU(64BIT)
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ALWAYS_INLINE size_t bswapuintptrt(size_t x) {
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return bswap64(x);
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}
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#else
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ALWAYS_INLINE size_t bswapuintptrt(size_t x) {
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return bswap32(x);
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}
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#endif
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} // namespace WTF
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#endif // SKY_ENGINE_WTF_BYTESWAP_H_
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