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| author | Martin Storsjö <martin@martin.st> | 2013-12-20 13:51:50 +0200 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2014-01-11 00:03:00 +0200 |
| commit | 44a0a98f92c7df1452029aa0295e0ece9d2165ca (patch) | |
| tree | ce9014492990e6866e071f82bdae843f02e228af /libavutil | |
| parent | f8558780bbbbba05f4724772b27152f257cb7b05 (diff) | |
| download | ffmpeg-44a0a98f92c7df1452029aa0295e0ece9d2165ca.tar.gz | |
arm: Add an option for making sure NEON registers aren't clobbered
This is pretty much based on the same test for XMM registers.
Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavutil')
| -rw-r--r-- | libavutil/arm/neontest.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/libavutil/arm/neontest.h b/libavutil/arm/neontest.h new file mode 100644 index 0000000000..eb46df8e0b --- /dev/null +++ b/libavutil/arm/neontest.h @@ -0,0 +1,62 @@ +/* + * check NEON registers for clobbering + * Copyright (c) 2008 Ramiro Polla <ramiro.polla@gmail.com> + * Copyright (c) 2013 Martin Storsjo + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <inttypes.h> +#include <stdint.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> + +#include "libavutil/bswap.h" + +#define storeneonregs(mem) \ + __asm__ volatile( \ + "vstm %0, {d8-d15}\n\t" \ + :: "r"(mem) : "memory") + +#define testneonclobbers(func, ctx, ...) \ + uint64_t neon[2][8]; \ + int ret; \ + storeneonregs(neon[0]); \ + ret = __real_ ## func(ctx, __VA_ARGS__); \ + storeneonregs(neon[1]); \ + if (memcmp(neon[0], neon[1], sizeof(neon[0]))) { \ + int i; \ + av_log(ctx, AV_LOG_ERROR, \ + "NEON REGS CLOBBERED IN %s!\n", #func); \ + for (i = 0; i < 8; i ++) \ + if (neon[0][i] != neon[1][i]) { \ + av_log(ctx, AV_LOG_ERROR, \ + "d%-2d = %016"PRIx64"\n", \ + 8 + i, av_bswap64(neon[0][i])); \ + av_log(ctx, AV_LOG_ERROR, \ + " -> %016"PRIx64"\n", \ + av_bswap64(neon[1][i])); \ + } \ + abort(); \ + } \ + return ret + +#define wrap(func) \ +int __real_ ## func; \ +int __wrap_ ## func; \ +int __wrap_ ## func |