FFmpeg
neontest.h
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1 /*
2  * check NEON registers for clobbering
3  * Copyright (c) 2008 Ramiro Polla <ramiro.polla@gmail.com>
4  * Copyright (c) 2013 Martin Storsjo
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #ifndef AVUTIL_AARCH64_NEONTEST_H
24 #define AVUTIL_AARCH64_NEONTEST_H
25 
26 #include <inttypes.h>
27 #include <stdint.h>
28 #include <stdlib.h>
29 #include <stdarg.h>
30 #include <string.h>
31 
32 #include "libavutil/bswap.h"
33 
34 #define storeneonregs(mem) \
35  __asm__ volatile( \
36  "stp d8, d9, [%0]\n\t" \
37  "stp d10, d11, [%0, #16]\n\t" \
38  "stp d12, d13, [%0, #32]\n\t" \
39  "stp d14, d15, [%0, #48]\n\t" \
40  :: "r"(mem) : "memory")
41 
42 #define testneonclobbers(func, ctx, ...) \
43  uint64_t neon[2][8]; \
44  int ret; \
45  storeneonregs(neon[0]); \
46  ret = __real_ ## func(ctx, __VA_ARGS__); \
47  storeneonregs(neon[1]); \
48  if (memcmp(neon[0], neon[1], sizeof(neon[0]))) { \
49  int i; \
50  av_log(ctx, AV_LOG_ERROR, \
51  "NEON REGS CLOBBERED IN %s!\n", #func); \
52  for (i = 0; i < 8; i ++) \
53  if (neon[0][i] != neon[1][i]) { \
54  av_log(ctx, AV_LOG_ERROR, \
55  "d%-2d = %016"PRIx64"\n", \
56  8 + i, av_bswap64(neon[0][i])); \
57  av_log(ctx, AV_LOG_ERROR, \
58  " -> %016"PRIx64"\n", \
59  av_bswap64(neon[1][i])); \
60  } \
61  abort(); \
62  } \
63  return ret
64 
65 #define wrap(func) \
66 int __real_ ## func; \
67 int __wrap_ ## func; \
68 int __wrap_ ## func
69 
70 #endif /* AVUTIL_AARCH64_NEONTEST_H */
byte swapping routines