mirror of
https://github.com/libretro/RetroArch
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89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
/* Copyright (C) 2010-2014 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (retro_endianness.h).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __LIBRETRO_SDK_ENDIANNESS_H
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#define __LIBRETRO_SDK_ENDIANNESS_H
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#include <retro_inline.h>
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#include <stdint.h>
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#define SWAP16(x) ((uint16_t)( \
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(((uint16_t)(x) & 0x00ff) << 8) | \
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(((uint16_t)(x) & 0xff00) >> 8) \
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))
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#define SWAP32(x) ((uint32_t)( \
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(((uint32_t)(x) & 0x000000ff) << 24) | \
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(((uint32_t)(x) & 0x0000ff00) << 8) | \
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(((uint32_t)(x) & 0x00ff0000) >> 8) | \
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(((uint32_t)(x) & 0xff000000) >> 24) \
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))
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static INLINE uint8_t is_little_endian(void){
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union {
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uint16_t x;
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uint8_t y[2];
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} u;
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u.x = 1;
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return u.y[0];
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}
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static INLINE uint32_t swap_if_big32(uint32_t val){
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if (is_little_endian())
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return val;
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return (val >> 24) | ((val >> 8) & 0xFF00) |
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((val << 8) & 0xFF0000) | (val << 24);
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}
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static INLINE uint32_t swap_if_little32(uint32_t val){
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if (is_little_endian())
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return (val >> 24) | ((val >> 8) & 0xFF00) |
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((val << 8) & 0xFF0000) | (val << 24);
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return val;
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}
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static INLINE uint16_t swap_if_big16(uint16_t val){
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if (is_little_endian())
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return val;
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return (val >> 8) | (val << 8);
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}
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static INLINE uint16_t swap_if_little16(uint16_t val){
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if (is_little_endian())
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return (val >> 8) | (val << 8);
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return val;
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}
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static INLINE void store32be(
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uint32_t * addr,
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uint32_t data
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){
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*addr = is_little_endian() ? SWAP32(data) : data;
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}
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static INLINE uint32_t load32be(const uint32_t * addr){
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return is_little_endian() ? SWAP32(*addr) : *addr;
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}
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#endif
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