projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 11fdf7f2 TL |
1 | /* SPDX-License-Identifier: BSD-3-Clause |
| 2 | * Copyright(c) 2010-2014 Intel Corporation | |
| 7c673cae FG |
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> | |
| 11fdf7f2 | 14 | #include <rte_config.h> |
| 7c673cae FG |
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 | */ | |
| 26 | static inline uint16_t rte_arch_bswap16(uint16_t _x) | |
| 27 | { | |
| 11fdf7f2 | 28 | uint16_t x = _x; |
| 7c673cae FG |
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 | */ | |
| 41 | static inline uint32_t rte_arch_bswap32(uint32_t _x) | |
| 42 | { | |
| 11fdf7f2 | 43 | uint32_t x = _x; |
| 7c673cae FG |
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_ */ |