mb/google/brya: Create rull variant
[coreboot2.git] / src / include / swab.h
blobeadf293745f0b62c4039ccff5a3d739cf29c3352
1 /* SPDX-License-Identifier: GPL-2.0-only */
3 /*
4 * linux/byteorder/swab.h
5 * Byte-swapping, independently from CPU endianness
6 * swabXX[ps]?(foo)
8 * Francois-Rene Rideau <fare@tunes.org> 19971205
9 * separated swab functions from cpu_to_XX,
10 * to clean up support for bizarre-endian architectures.
12 * See asm-i386/byteorder.h and such for examples of how to provide
13 * architecture-dependent optimized versions
17 /* casts are necessary for constants, because we never know how for sure
18 * how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way.
21 #ifndef _SWAB_H
22 #define _SWAB_H
24 #include <stdint.h>
26 #if ENV_ARMV4
27 #define swab16(x) \
28 ((unsigned short)( \
29 (((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \
30 (((unsigned short)(x) & (unsigned short)0xff00U) >> 8)))
32 #define swab32(x) \
33 ((unsigned int)( \
34 (((unsigned int)(x) & 0x000000ffUL) << 24) | \
35 (((unsigned int)(x) & 0x0000ff00UL) << 8) | \
36 (((unsigned int)(x) & 0x00ff0000UL) >> 8) | \
37 (((unsigned int)(x) & 0xff000000UL) >> 24)))
39 #define swab64(x) \
40 ((uint64_t)( \
41 (((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) | \
42 (((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
43 (((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
44 (((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
45 (((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
46 (((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
47 (((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
48 (((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56)))
49 #else /* ENV_ARMV4 */
50 #define swab16(x) ((uint16_t)__builtin_bswap16(x))
51 #define swab32(x) ((uint32_t)__builtin_bswap32(x))
52 #define swab64(x) ((uint64_t)__builtin_bswap64(x))
53 #endif /* !ENV_ARMV4 */
55 #endif /* _SWAB_H */