9d5cc55f0f
* qatar/master: arm: Add an option for making sure NEON registers aren't clobbered Conflicts: configure Merged-by: Michael Niedermayer <michaelni@gmx.at>
63 lines
2.6 KiB
C
63 lines
2.6 KiB
C
/*
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* check NEON registers for clobbering
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* Copyright (c) 2008 Ramiro Polla <ramiro.polla@gmail.com>
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* Copyright (c) 2013 Martin Storsjo
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <inttypes.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include "libavutil/bswap.h"
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#define storeneonregs(mem) \
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__asm__ volatile( \
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"vstm %0, {d8-d15}\n\t" \
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:: "r"(mem) : "memory")
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#define testneonclobbers(func, ctx, ...) \
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uint64_t neon[2][8]; \
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int ret; \
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storeneonregs(neon[0]); \
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ret = __real_ ## func(ctx, __VA_ARGS__); \
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storeneonregs(neon[1]); \
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if (memcmp(neon[0], neon[1], sizeof(neon[0]))) { \
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int i; \
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av_log(ctx, AV_LOG_ERROR, \
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"NEON REGS CLOBBERED IN %s!\n", #func); \
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for (i = 0; i < 8; i ++) \
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if (neon[0][i] != neon[1][i]) { \
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av_log(ctx, AV_LOG_ERROR, \
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"d%-2d = %016"PRIx64"\n", \
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8 + i, av_bswap64(neon[0][i])); \
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av_log(ctx, AV_LOG_ERROR, \
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" -> %016"PRIx64"\n", \
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av_bswap64(neon[1][i])); \
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} \
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abort(); \
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} \
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return ret
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#define wrap(func) \
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int __real_ ## func; \
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int __wrap_ ## func; \
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int __wrap_ ## func
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