2 * SPDX-License-Identifier: BSD-3-Clause
3 * Inspired from FreeBSD src/sys/powerpc/include/endian.h
4 * Copyright (c) 1987, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
8 #ifndef _RTE_BYTEORDER_PPC_64_H_
9 #define _RTE_BYTEORDER_PPC_64_H_
16 #include "generic/rte_byteorder.h"
19 * An architecture-optimized byte swap for a 16-bit value.
21 * Do not use this function directly. The preferred function is rte_bswap16().
23 static inline uint16_t rte_arch_bswap16(uint16_t _x)
25 return (_x >> 8) | ((_x << 8) & 0xff00);
29 * An architecture-optimized byte swap for a 32-bit value.
31 * Do not use this function directly. The preferred function is rte_bswap32().
33 static inline uint32_t rte_arch_bswap32(uint32_t _x)
35 return (_x >> 24) | ((_x >> 8) & 0xff00) | ((_x << 8) & 0xff0000) |
36 ((_x << 24) & 0xff000000);
40 * An architecture-optimized byte swap for a 64-bit value.
42 * Do not use this function directly. The preferred function is rte_bswap64().
45 static inline uint64_t rte_arch_bswap64(uint64_t _x)
47 return (_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) |
48 ((_x >> 8) & 0xff000000) | ((_x << 8) & (0xffULL << 32)) |
49 ((_x << 24) & (0xffULL << 40)) |
50 ((_x << 40) & (0xffULL << 48)) | ((_x << 56));
53 #ifndef RTE_FORCE_INTRINSICS
54 #define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \
55 rte_constant_bswap16(x) : \
58 #define rte_bswap32(x) ((uint32_t)(__builtin_constant_p(x) ? \
59 rte_constant_bswap32(x) : \
62 #define rte_bswap64(x) ((uint64_t)(__builtin_constant_p(x) ? \
63 rte_constant_bswap64(x) : \
67 * __builtin_bswap16 is only available gcc 4.8 and upwards
69 #if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
70 #define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ? \
71 rte_constant_bswap16(x) : \
76 /* Power 8 have both little endian and big endian mode
77 * Power 7 only support big endian
79 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
81 #define rte_cpu_to_le_16(x) (x)
82 #define rte_cpu_to_le_32(x) (x)
83 #define rte_cpu_to_le_64(x) (x)
85 #define rte_cpu_to_be_16(x) rte_bswap16(x)
86 #define rte_cpu_to_be_32(x) rte_bswap32(x)
87 #define rte_cpu_to_be_64(x) rte_bswap64(x)
89 #define rte_le_to_cpu_16(x) (x)
90 #define rte_le_to_cpu_32(x) (x)
91 #define rte_le_to_cpu_64(x) (x)
93 #define rte_be_to_cpu_16(x) rte_bswap16(x)
94 #define rte_be_to_cpu_32(x) rte_bswap32(x)
95 #define rte_be_to_cpu_64(x) rte_bswap64(x)
97 #else /* RTE_BIG_ENDIAN */
99 #define rte_cpu_to_le_16(x) rte_bswap16(x)
100 #define rte_cpu_to_le_32(x) rte_bswap32(x)
101 #define rte_cpu_to_le_64(x) rte_bswap64(x)
103 #define rte_cpu_to_be_16(x) (x)
104 #define rte_cpu_to_be_32(x) (x)
105 #define rte_cpu_to_be_64(x) (x)
107 #define rte_le_to_cpu_16(x) rte_bswap16(x)
108 #define rte_le_to_cpu_32(x) rte_bswap32(x)
109 #define rte_le_to_cpu_64(x) rte_bswap64(x)
111 #define rte_be_to_cpu_16(x) (x)
112 #define rte_be_to_cpu_32(x) (x)
113 #define rte_be_to_cpu_64(x) (x)
120 #endif /* _RTE_BYTEORDER_PPC_64_H_ */