58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef _SWAB_H
|
|
#define _SWAB_H
|
|
|
|
/*
|
|
* linux/byteorder/swab.h
|
|
* Byte-swapping, independently from CPU endianness
|
|
* swabXX[ps]?(foo)
|
|
*
|
|
* Francois-Rene Rideau <fare@tunes.org> 19971205
|
|
* separated swab functions from cpu_to_XX,
|
|
* to clean up support for bizarre-endian architectures.
|
|
*
|
|
* See asm-i386/byteorder.h and such for examples of how to provide
|
|
* architecture-dependent optimized versions
|
|
*
|
|
*/
|
|
|
|
/* casts are necessary for constants, because we never know how for sure
|
|
* how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way.
|
|
*/
|
|
#define swab16(x) \
|
|
((unsigned short)( \
|
|
(((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \
|
|
(((unsigned short)(x) & (unsigned short)0xff00U) >> 8) ))
|
|
|
|
#define swab32(x) \
|
|
((unsigned int)( \
|
|
(((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) | \
|
|
(((unsigned int)(x) & (unsigned int)0x0000ff00UL) << 8) | \
|
|
(((unsigned int)(x) & (unsigned int)0x00ff0000UL) >> 8) | \
|
|
(((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) ))
|
|
|
|
#define swab64(x) \
|
|
((uint64_t)( \
|
|
(((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) | \
|
|
(((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
|
|
(((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
|
|
(((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
|
|
(((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
|
|
(((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
|
|
(((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
|
|
(((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56) ))
|
|
|
|
#endif /* _SWAB_H */
|