mirror of https://github.com/F-Stack/f-stack.git
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#ifndef _RTE_BYTEORDER_X86_H_
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#define _RTE_BYTEORDER_X86_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <rte_common.h>
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#include <rte_config.h>
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#include "generic/rte_byteorder.h"
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#ifndef RTE_BYTE_ORDER
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#define RTE_BYTE_ORDER RTE_LITTLE_ENDIAN
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#endif
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/*
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* An architecture-optimized byte swap for a 16-bit value.
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*
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* Do not use this function directly. The preferred function is rte_bswap16().
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*/
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static inline uint16_t rte_arch_bswap16(uint16_t _x)
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{
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uint16_t x = _x;
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asm volatile ("xchgb %b[x1],%h[x2]"
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: [x1] "=Q" (x)
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: [x2] "0" (x)
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);
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return x;
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}
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/*
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* An architecture-optimized byte swap for a 32-bit value.
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*
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* Do not use this function directly. The preferred function is rte_bswap32().
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*/
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static inline uint32_t rte_arch_bswap32(uint32_t _x)
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{
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uint32_t x = _x;
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asm volatile ("bswap %[x]"
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: [x] "+r" (x)
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);
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return x;
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}
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#ifndef RTE_FORCE_INTRINSICS
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#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \
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rte_constant_bswap16(x) : \
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rte_arch_bswap16(x)))
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#define rte_bswap32(x) ((uint32_t)(__builtin_constant_p(x) ? \
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rte_constant_bswap32(x) : \
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rte_arch_bswap32(x)))
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#define rte_bswap64(x) ((uint64_t)(__builtin_constant_p(x) ? \
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rte_constant_bswap64(x) : \
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rte_arch_bswap64(x)))
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#else
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/*
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* __builtin_bswap16 is only available gcc 4.8 and upwards
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*/
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#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
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#define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \
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rte_constant_bswap16(x) : \
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rte_arch_bswap16(x)))
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#endif
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#endif
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#define rte_cpu_to_le_16(x) (x)
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#define rte_cpu_to_le_32(x) (x)
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#define rte_cpu_to_le_64(x) (x)
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#define rte_cpu_to_be_16(x) rte_bswap16(x)
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#define rte_cpu_to_be_32(x) rte_bswap32(x)
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#define rte_cpu_to_be_64(x) rte_bswap64(x)
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#define rte_le_to_cpu_16(x) (x)
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#define rte_le_to_cpu_32(x) (x)
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#define rte_le_to_cpu_64(x) (x)
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#define rte_be_to_cpu_16(x) rte_bswap16(x)
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#define rte_be_to_cpu_32(x) rte_bswap32(x)
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#define rte_be_to_cpu_64(x) rte_bswap64(x)
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#ifdef RTE_ARCH_I686
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#include "rte_byteorder_32.h"
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#else
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#include "rte_byteorder_64.h"
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTE_BYTEORDER_X86_H_ */
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