1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 3 */ 4 5 #ifndef _RTE_BYTEORDER_X86_H_ 6 #define _RTE_BYTEORDER_X86_H_ 7 8 #ifdef __cplusplus 9 extern "C" { 10 #endif 11 12 #include <stdint.h> 13 #include <rte_common.h> 14 #include <rte_config.h> 15 #include "generic/rte_byteorder.h" 16 17 #ifndef RTE_BYTE_ORDER 18 #define RTE_BYTE_ORDER RTE_LITTLE_ENDIAN 19 #endif 20 21 /* 22 * An architecture-optimized byte swap for a 16-bit value. 23 * 24 * Do not use this function directly. The preferred function is rte_bswap16(). 25 */ rte_arch_bswap16(uint16_t _x)26static inline uint16_t rte_arch_bswap16(uint16_t _x) 27 { 28 uint16_t x = _x; 29 asm volatile ("xchgb %b[x1],%h[x2]" 30 : [x1] "=Q" (x) 31 : [x2] "0" (x) 32 ); 33 return x; 34 } 35 36 /* 37 * An architecture-optimized byte swap for a 32-bit value. 38 * 39 * Do not use this function directly. The preferred function is rte_bswap32(). 40 */ rte_arch_bswap32(uint32_t _x)41static inline uint32_t rte_arch_bswap32(uint32_t _x) 42 { 43 uint32_t x = _x; 44 asm volatile ("bswap %[x]" 45 : [x] "+r" (x) 46 ); 47 return x; 48 } 49 50 #ifndef RTE_FORCE_INTRINSICS 51 #define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \ 52 rte_constant_bswap16(x) : \ 53 rte_arch_bswap16(x))) 54 55 #define rte_bswap32(x) ((uint32_t)(__builtin_constant_p(x) ? \ 56 rte_constant_bswap32(x) : \ 57 rte_arch_bswap32(x))) 58 59 #define rte_bswap64(x) ((uint64_t)(__builtin_constant_p(x) ? \ 60 rte_constant_bswap64(x) : \ 61 rte_arch_bswap64(x))) 62 #else 63 /* 64 * __builtin_bswap16 is only available gcc 4.8 and upwards 65 */ 66 #if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8) 67 #define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \ 68 rte_constant_bswap16(x) : \ 69 rte_arch_bswap16(x))) 70 #endif 71 #endif 72 73 #define rte_cpu_to_le_16(x) (x) 74 #define rte_cpu_to_le_32(x) (x) 75 #define rte_cpu_to_le_64(x) (x) 76 77 #define rte_cpu_to_be_16(x) rte_bswap16(x) 78 #define rte_cpu_to_be_32(x) rte_bswap32(x) 79 #define rte_cpu_to_be_64(x) rte_bswap64(x) 80 81 #define rte_le_to_cpu_16(x) (x) 82 #define rte_le_to_cpu_32(x) (x) 83 #define rte_le_to_cpu_64(x) (x) 84 85 #define rte_be_to_cpu_16(x) rte_bswap16(x) 86 #define rte_be_to_cpu_32(x) rte_bswap32(x) 87 #define rte_be_to_cpu_64(x) rte_bswap64(x) 88 89 #ifdef RTE_ARCH_I686 90 #include "rte_byteorder_32.h" 91 #else 92 #include "rte_byteorder_64.h" 93 #endif 94 95 #ifdef __cplusplus 96 } 97 #endif 98 99 #endif /* _RTE_BYTEORDER_X86_H_ */ 100