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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 _RTE_BYTEORDER_X86_H_
#define _RTE_BYTEORDER_X86_H_
#ifdef __cplusplus
extern "C" {
#endif
#include "generic/rte_byteorder.h"
#ifndef RTE_BYTE_ORDER
#define RTE_BYTE_ORDER RTE_LITTLE_ENDIAN
#endif
/*
* An architecture-optimized byte swap for a 16-bit value.
*
* Do not use this function directly. The preferred function is rte_bswap16().
*/
static inline uint16_t rte_arch_bswap16(uint16_t _x)
{
register uint16_t x = _x;
asm volatile ("xchgb %b[x1],%h[x2]"
: [x1] "=Q" (x)
: [x2] "0" (x)
);
return x;
}
/*
* An architecture-optimized byte swap for a 32-bit value.
*
* Do not use this function directly. The preferred function is rte_bswap32().
*/
static inline uint32_t rte_arch_bswap32(uint32_t _x)
{
register uint32_t x = _x;
asm volatile ("bswap %[x]"
: [x] "+r" (x)
);
return x;
}
#ifndef RTE_FORCE_INTRINSICS
#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \
rte_constant_bswap16(x) : \
rte_arch_bswap16(x)))
#define rte_bswap32(x) ((uint32_t)(__builtin_constant_p(x) ? \
rte_constant_bswap32(x) : \
rte_arch_bswap32(x)))
#define rte_bswap64(x) ((uint64_t)(__builtin_constant_p(x) ? \
rte_constant_bswap64(x) : \
rte_arch_bswap64(x)))
#else
/*
* __builtin_bswap16 is only available gcc 4.8 and upwards
*/
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \
rte_constant_bswap16(x) : \
rte_arch_bswap16(x)))
#endif
#endif
#define rte_cpu_to_le_16(x) (x)
#define rte_cpu_to_le_32(x) (x)
#define rte_cpu_to_le_64(x) (x)
#define rte_cpu_to_be_16(x) rte_bswap16(x)
#define rte_cpu_to_be_32(x) rte_bswap32(x)
#define rte_cpu_to_be_64(x) rte_bswap64(x)
#define rte_le_to_cpu_16(x) (x)
#define rte_le_to_cpu_32(x) (x)
#define rte_le_to_cpu_64(x) (x)
#define rte_be_to_cpu_16(x) rte_bswap16(x)
#define rte_be_to_cpu_32(x) rte_bswap32(x)
#define rte_be_to_cpu_64(x) rte_bswap64(x)
#ifdef RTE_ARCH_I686
#include "rte_byteorder_32.h"
#else
#include "rte_byteorder_64.h"
#endif
#ifdef __cplusplus
}
#endif
#endif /* _RTE_BYTEORDER_X86_H_ */
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