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