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#include <inttypes.h>
24#include <stdint.h>
25#include <stdlib.h>
26#include <stdarg.h>
27#include <string.h>
28
29#include "libavutil/bswap.h"
30
31#define storeneonregs(mem)                \
32    __asm__ volatile(                     \
33        "vstm %0, {d8-d15}\n\t"           \
34        :: "r"(mem) : "memory")
35
36#define testneonclobbers(func, ctx, ...)                        \
37    uint64_t neon[2][8];                                        \
38    int ret;                                                    \
39    storeneonregs(neon[0]);                                     \
40    ret = __real_ ## func(ctx, __VA_ARGS__);                    \
41    storeneonregs(neon[1]);                                     \
42    if (memcmp(neon[0], neon[1], sizeof(neon[0]))) {            \
43        int i;                                                  \
44        av_log(ctx, AV_LOG_ERROR,                               \
45               "NEON REGS CLOBBERED IN %s!\n", #func);          \
46        for (i = 0; i < 8; i ++)                                \
47            if (neon[0][i] != neon[1][i]) {                     \
48                av_log(ctx, AV_LOG_ERROR,                       \
49                       "d%-2d = %016"PRIx64"\n",                \
50                       8 + i, av_bswap64(neon[0][i]));          \
51                av_log(ctx, AV_LOG_ERROR,                       \
52                       "   -> %016"PRIx64"\n",                  \
53                       av_bswap64(neon[1][i]));                 \
54            }                                                   \
55        abort();                                                \
56    }                                                           \
57    return ret
58
59#define wrap(func)      \
60int __real_ ## func;    \
61int __wrap_ ## func;    \
62int __wrap_ ## func
63