diff options
Diffstat (limited to 'rtemsbsd/powerpc/include/linux/bitrev.h')
-rw-r--r-- | rtemsbsd/powerpc/include/linux/bitrev.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/rtemsbsd/powerpc/include/linux/bitrev.h b/rtemsbsd/powerpc/include/linux/bitrev.h new file mode 100644 index 00000000..489eb0d4 --- /dev/null +++ b/rtemsbsd/powerpc/include/linux/bitrev.h @@ -0,0 +1,65 @@ +/* + * 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 */ |