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34 #ifndef _RTE_BYTEORDER_X86_H_
35 #define _RTE_BYTEORDER_X86_H_
41 #include "generic/rte_byteorder.h"
44 * An architecture-optimized byte swap for a 16-bit value.
46 * Do not use this function directly. The preferred function is rte_bswap16().
48 static inline uint16_t rte_arch_bswap16(uint16_t _x)
50 register uint16_t x = _x;
51 asm volatile ("xchgb %b[x1],%h[x2]"
59 * An architecture-optimized byte swap for a 32-bit value.
61 * Do not use this function directly. The preferred function is rte_bswap32().
63 static inline uint32_t rte_arch_bswap32(uint32_t _x)
65 register uint32_t x = _x;
66 asm volatile ("bswap %[x]"
72 #ifndef RTE_FORCE_INTRINSICS
73 #define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \
74 rte_constant_bswap16(x) : \
77 #define rte_bswap32(x) ((uint32_t)(__builtin_constant_p(x) ? \
78 rte_constant_bswap32(x) : \
81 #define rte_bswap64(x) ((uint64_t)(__builtin_constant_p(x) ? \
82 rte_constant_bswap64(x) : \
86 * __builtin_bswap16 is only available gcc 4.8 and upwards
88 #if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
89 #define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \
90 rte_constant_bswap16(x) : \
95 #define rte_cpu_to_le_16(x) (x)
96 #define rte_cpu_to_le_32(x) (x)
97 #define rte_cpu_to_le_64(x) (x)
99 #define rte_cpu_to_be_16(x) rte_bswap16(x)
100 #define rte_cpu_to_be_32(x) rte_bswap32(x)
101 #define rte_cpu_to_be_64(x) rte_bswap64(x)
103 #define rte_le_to_cpu_16(x) (x)
104 #define rte_le_to_cpu_32(x) (x)
105 #define rte_le_to_cpu_64(x) (x)
107 #define rte_be_to_cpu_16(x) rte_bswap16(x)
108 #define rte_be_to_cpu_32(x) rte_bswap32(x)
109 #define rte_be_to_cpu_64(x) rte_bswap64(x)
112 #include "rte_byteorder_32.h"
114 #include "rte_byteorder_64.h"
121 #endif /* _RTE_BYTEORDER_X86_H_ */