1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #ifndef AVUTIL_RISCV_BSWAP_H
20 #define AVUTIL_RISCV_BSWAP_H
21
22 #include <stdint.h>
23 #include "config.h"
26
27 #if defined (__GNUC__) || defined (__clang__)
28 #define av_bswap16 __builtin_bswap16
29
31 {
32 #if HAVE_RV && !defined(__riscv_zbb)
33 if (!__builtin_constant_p(x) &&
35 uintptr_t y;
36
38 ".option push\n"
39 ".option arch, +zbb\n"
40 "rev8 %0, %1\n"
41 ".option pop" : "=r" (y) : "r" (x));
42 return y >> (__riscv_xlen - 32);
43 }
44 #endif
45 return __builtin_bswap32(x);
46 }
47 #define av_bswap32 av_bswap32_rv
48
49 #if __riscv_xlen >= 64
51 {
52 #if HAVE_RV && !defined(__riscv_zbb)
53 if (!__builtin_constant_p(x) &&
55 uintptr_t y;
56
58 ".option push\n"
59 ".option arch, +zbb\n"
60 "rev8 %0, %1\n"
61 ".option pop" : "=r" (y) : "r" (x));
62 return y >> (__riscv_xlen - 64);
63 }
64 #endif
65 return __builtin_bswap64(x);
66 }
67 #define av_bswap64 av_bswap64_rv
68 #endif
69
70 #endif
71
72 #endif /* AVUTIL_RISCV_BSWAP_H */