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/*
* Copyright (c) 2015 embedded brains GmbH
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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 _LINUX_BITREV_H
#define _LINUX_BITREV_H
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
extern const uint8_t bitrev_nibbles[16];
static inline uint8_t
bitrev8(uint8_t x)
{
return ((bitrev_nibbles[x & 15] << 4) | bitrev_nibbles[x >> 4]);
}
static inline uint16_t
bitrev16(uint16_t x)
{
return (uint16_t)((bitrev8((uint8_t)x) << 8) |
bitrev8((uint8_t)(x >> 8)));
}
static inline uint32_t
bitrev32(uint32_t x)
{
return ((((uint32_t)bitrev16((uint16_t)x) << 16)) |
((uint32_t)bitrev8((uint16_t)(x >> 16))));
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _LINUX_BITREV_H */
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