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/*
* Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com>
*
* 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.
*
* This program is distributed in the hope that it would 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 the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef MISC_H_
#define MISC_H_
/* Return a 64-bit litte-endian value from a given 64-bit big-endian one */
static inline uint64_t be64_to_cpu(uint64_t val)
{
return (uint64_t)((((uint64_t)val & (uint64_t)0x00000000000000ffULL) << 56) |
(((uint64_t)val & (uint64_t)0x000000000000ff00ULL) << 40) |
(((uint64_t)val & (uint64_t)0x0000000000ff0000ULL) << 24) |
(((uint64_t)val & (uint64_t)0x00000000ff000000ULL) << 8) |
(((uint64_t)val & (uint64_t)0x000000ff00000000ULL) >> 8) |
(((uint64_t)val & (uint64_t)0x0000ff0000000000ULL) >> 24) |
(((uint64_t)val & (uint64_t)0x00ff000000000000ULL) >> 40) |
(((uint64_t)val & (uint64_t)0xff00000000000000ULL) >> 56));
}
/* Return a 32-bit litte-endian value from a given 32-bit big-endian one */
static inline uint32_t be32_to_cpu(uint32_t val)
{
return (uint32_t)((((uint32_t)val & (uint32_t)0x000000ffUL) << 24) |
(((uint32_t)val & (uint32_t)0x0000ff00UL) << 8) |
(((uint32_t)val & (uint32_t)0x00ff0000UL) >> 8) |
(((uint32_t)val & (uint32_t)0xff000000UL) >> 24));
}
/* Return a 16-bit litte-endian value from a given 16-bit big-endian one */
static inline uint16_t be16_to_cpu(uint16_t val)
{
return (uint16_t)((((uint16_t)val & (uint16_t)0x00ffU) << 8) |
(((uint16_t)val & (uint16_t)0xff00U) >> 8));
}
#endif /* MISC_H_ */
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