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/*
* bswap.h
*
* Copyright (c) 2001-2002 Ben Fennema
* All rights reserved.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef __BSWAP_H
#define __BSWAP_H
#include "config.h"
#include <stdint.h>
#include <sys/types.h>
#define constant_swab16(x) \
((uint16_t)((((uint16_t)(x) & 0x00FFU) << 8) | \
(((uint16_t)(x) & 0xFF00U) >> 8)))
#define constant_swab32(x) \
((uint32_t)((((uint32_t)(x) & 0x000000FFU) << 24) | \
(((uint32_t)(x) & 0x0000FF00U) << 8) | \
(((uint32_t)(x) & 0x00FF0000U) >> 8) | \
(((uint32_t)(x) & 0xFF000000U) >> 24)))
#define constant_swab64(x) \
((uint64_t)((((uint64_t)(x) & 0x00000000000000FFULL) << 56) | \
(((uint64_t)(x) & 0x000000000000FF00ULL) << 40) | \
(((uint64_t)(x) & 0x0000000000FF0000ULL) << 24) | \
(((uint64_t)(x) & 0x00000000FF000000ULL) << 8) | \
(((uint64_t)(x) & 0x000000FF00000000ULL) >> 8) | \
(((uint64_t)(x) & 0x0000FF0000000000ULL) >> 24) | \
(((uint64_t)(x) & 0x00FF000000000000ULL) >> 40) | \
(((uint64_t)(x) & 0xFF00000000000000ULL) >> 56)))
static inline uint16_t swab16(uint16_t x)
{
return ((uint16_t)((((uint16_t)(x) & 0x00FFU) << 8) | \
(((uint16_t)(x) & 0xFF00U) >> 8)));
}
static inline uint32_t swab32(uint32_t x)
{
return ((uint32_t)((((uint32_t)(x) & 0x000000FFU) << 24) | \
(((uint32_t)(x) & 0x0000FF00U) << 8) | \
(((uint32_t)(x) & 0x00FF0000U) >> 8) | \
(((uint32_t)(x) & 0xFF000000U) >> 24)));
}
static inline uint64_t swab64(uint64_t x)
{
return ((uint64_t)((((uint64_t)(x) & 0x00000000000000FFULL) << 56) | \
(((uint64_t)(x) & 0x000000000000FF00ULL) << 40) | \
(((uint64_t)(x) & 0x0000000000FF0000ULL) << 24) | \
(((uint64_t)(x) & 0x00000000FF000000ULL) << 8) | \
(((uint64_t)(x) & 0x000000FF00000000ULL) >> 8) | \
(((uint64_t)(x) & 0x0000FF0000000000ULL) >> 24) | \
(((uint64_t)(x) & 0x00FF000000000000ULL) >> 40) | \
(((uint64_t)(x) & 0xFF00000000000000ULL) >> 56)));
}
#define constant_swab16p(x) \
((uint16_t)(((*(uint16_t *)(x) & 0x00FFU) << 8) | \
((*(uint16_t *)(x) & 0xFF00U) >> 8)))
#define constant_swab32p(x) \
((uint32_t)(((*(uint32_t *)(x) & 0x000000FFU) << 24) | \
((*(uint32_t *)(x) & 0x0000FF00U) << 8) | \
((*(uint32_t *)(x) & 0x00FF0000U) >> 8) | \
((*(uint32_t *)(x) & 0xFF000000U) >> 24)))
#define constant_swab64p(x) \
((uint64_t)(((*(uint64_t *)(x) & 0x00000000000000FFULL) << 56) | \
((*(uint64_t *)(x) & 0x000000000000FF00ULL) << 40) | \
((*(uint64_t *)(x) & 0x0000000000FF0000ULL) << 24) | \
((*(uint64_t *)(x) & 0x00000000FF000000ULL) << 8) | \
((*(uint64_t *)(x) & 0x000000FF00000000ULL) >> 8) | \
((*(uint64_t *)(x) & 0x0000FF0000000000ULL) >> 24) | \
((*(uint64_t *)(x) & 0x00FF000000000000ULL) >> 40) | \
((*(uint64_t *)(x) & 0xFF00000000000000ULL) >> 56)))
static inline uint16_t swab16p(uint16_t *x)
{
return ((uint16_t)(((*(uint16_t *)(x) & 0x00FFU) << 8) | \
((*(uint16_t *)(x) & 0xFF00U) >> 8)));
}
static inline uint32_t swab32p(uint32_t *x)
{
return ((uint32_t)(((*(uint32_t *)(x) & 0x000000FFU) << 24) | \
((*(uint32_t *)(x) & 0x0000FF00U) << 8) | \
((*(uint32_t *)(x) & 0x00FF0000U) >> 8) | \
((*(uint32_t *)(x) & 0xFF000000U) >> 24)));
}
static inline uint64_t swab64p(uint64_t *x)
{
return ((uint64_t)(((*(uint64_t *)(x) & 0x00000000000000FFULL) << 56) | \
((*(uint64_t *)(x) & 0x000000000000FF00ULL) << 40) | \
((*(uint64_t *)(x) & 0x0000000000FF0000ULL) << 24) | \
((*(uint64_t *)(x) & 0x00000000FF000000ULL) << 8) | \
((*(uint64_t *)(x) & 0x000000FF00000000ULL) >> 8) | \
((*(uint64_t *)(x) & 0x0000FF0000000000ULL) >> 24) | \
((*(uint64_t *)(x) & 0x00FF000000000000ULL) >> 40) | \
((*(uint64_t *)(x) & 0xFF00000000000000ULL) >> 56)));
}
#ifdef WORDS_BIGENDIAN
#define le16_to_cpu(x) (__builtin_constant_p(x) ? \
constant_swab16(x) : \
swab16(x))
#define le32_to_cpu(x) (__builtin_constant_p(x) ? \
constant_swab32(x) : \
swab32(x))
#define le64_to_cpu(x) (__builtin_constant_p(x) ? \
constant_swab64(x) : \
swab64(x))
#define constant_le16_to_cpu(x) constant_swab16((x))
#define constant_le32_to_cpu(x) constant_swab32((x))
#define constant_le64_to_cpu(x) constant_swab64((x))
#define le16_to_cpup(x) (__builtin_constant_p(x) ? \
constant_swab16p(x) : \
swab16p(x))
#define le32_to_cpup(x) (__builtin_constant_p(x) ? \
constant_swab32p(x) : \
swab32p(x))
#define le64_to_cpup(x) (__builtin_constant_p(x) ? \
constant_swab64p(x) : \
swab64p(x))
#define constant_le16_to_cpup(x) constant_swab16p((x))
#define constant_le32_to_cpup(x) constant_swab32p((x))
#define constant_le64_to_cpup(x) constant_swab64p((x))
#define be16_to_cpu(x) ((uint16_t)(x))
#define be32_to_cpu(x) ((uint32_t)(x))
#define be64_to_cpu(x) ((uint64_t)(x))
#define constant_be16_to_cpu(x) ((uint16_t)(x))
#define constant_be32_to_cpu(x) ((uint32_t)(x))
#define constant_be64_to_cpu(x) ((uint64_t)(x))
#define be16_to_cpup(x) (*(uint16_t *)(x))
#define be32_to_cpup(x) (*(uint32_t *)(x))
#define be64_to_cpup(x) (*(uint64_t *)(x))
#define constant_be16_to_cpup(x) (*(uint16_t *)(x))
#define constant_be32_to_cpup(x) (*(uint32_t *)(x))
#define constant_be64_to_cpup(x) (*(uint64_t *)(x))
#else /* WORDS_BIGENDIAN */
#define le16_to_cpu(x) ((uint16_t)(x))
#define le32_to_cpu(x) ((uint32_t)(x))
#define le64_to_cpu(x) ((uint64_t)(x))
#define constant_le16_to_cpu(x) ((uint16_t)(x))
#define constant_le32_to_cpu(x) ((uint32_t)(x))
#define constant_le64_to_cpu(x) ((uint64_t)(x))
#define le16_to_cpup(x) (*(uint16_t *)(x))
#define le32_to_cpup(x) (*(uint32_t *)(x))
#define le64_to_cpup(x) (*(uint64_t *)(x))
#define constant_le16_to_cpup(x) (*(uint16_t *)(x))
#define constant_le32_to_cpup(x) (*(uint32_t *)(x))
#define constant_le64_to_cpup(x) (*(uint64_t *)(x))
#define be16_to_cpu(x) (__builtin_constant_p(x) ? \
constant_swab16(x) : \
swab16(x))
#define be32_to_cpu(x) (__builtin_constant_p(x) ? \
constant_swab32(x) : \
swab32(x))
#define be64_to_cpu(x) (__builtin_constant_p(x) ? \
constant_swab64(x) : \
swab64(x))
#define constant_be16_to_cpu(x) constant_swab16((x))
#define constant_be32_to_cpu(x) constant_swab32((x))
#define constant_be64_to_cpu(x) constant_swab64((x))
#define be16_to_cpup(x) (__builtin_constant_p(x) ? \
constant_swab16p(x) : \
swab16p(x))
#define be32_to_cpup(x) (__builtin_constant_p(x) ? \
constant_swab32p(x) : \
swab32p(x))
#define be64_to_cpup(x) (__builtin_constant_p(x) ? \
constant_swab64p(x) : \
swab64p(x))
#define constant_be16_to_cpup(x) constant_swab16p((x))
#define constant_be32_to_cpup(x) constant_swab32p((x))
#define constant_be64_to_cpup(x) constant_swab64p((x))
#endif /* WORDS_BIGENDIAN */
#define cpu_to_le16(x) le16_to_cpu((x))
#define cpu_to_le32(x) le32_to_cpu((x))
#define cpu_to_le64(x) le64_to_cpu((x))
#define constant_cpu_to_le16(x) constant_le16_to_cpu((x))
#define constant_cpu_to_le32(x) constant_le32_to_cpu((x))
#define constant_cpu_to_le64(x) constant_le64_to_cpu((x))
#define cpu_to_le16p(x) le16_to_cpup((x))
#define cpu_to_le32p(x) le32_to_cpup((x))
#define cpu_to_le64p(x) le64_to_cpup((x))
#define constant_cpu_to_le16p(x) constant_le16_to_cpup((x))
#define constant_cpu_to_le32p(x) constant_le32_to_cpup((x))
#define constant_cpu_to_le64p(x) constant_le64_to_cpup((x))
#define cpu_to_be16(x) be16_to_cpu((x))
#define cpu_to_be32(x) be32_to_cpu((x))
#define cpu_to_be64(x) be64_to_cpu((x))
#define constant_cpu_to_be16(x) constant_be16_to_cpu((x))
#define constant_cpu_to_be32(x) constant_be32_to_cpu((x))
#define constant_cpu_to_be64(x) constant_be64_to_cpu((x))
#define cpu_to_be16p(x) be16_to_cpup((x))
#define cpu_to_be32p(x) be32_to_cpup((x))
#define cpu_to_be64p(x) be64_to_cpup((x))
#define constant_cpu_to_be16p(x) constant_be16_to_cpup((x))
#define constant_cpu_to_be32p(x) constant_be32_to_cpup((x))
#define constant_cpu_to_be64p(x) constant_be64_to_cpup((x))
#endif /* __BSWAP_H */
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