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Merge remote-tracking branch 'qatar/master'
* qatar/master: arm: Add an option for making sure NEON registers aren't clobbered Conflicts: configure Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
commit
9d5cc55f0f
13
configure
vendored
13
configure
vendored
@ -350,6 +350,8 @@ Developer options (useful when working on FFmpeg itself):
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--enable-ftrapv Trap arithmetic overflows
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--samples=PATH location of test samples for FATE, if not set use
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\$FATE_SAMPLES at make invocation time.
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--enable-neon-clobber-test check NEON registers for clobbering (should be
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used only for debugging purposes)
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--enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
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should be used only for debugging purposes)
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--enable-random randomly enable/disable components
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@ -1371,6 +1373,7 @@ CONFIG_LIST="
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mdct
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memalign_hack
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memory_poisoning
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neon_clobber_test
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network
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nonfree
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pic
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@ -4629,6 +4632,16 @@ test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
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# -wN '..@*' is more selective than -x, but not available everywhere.
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check_stripflags -wN \'..@*\' || check_stripflags -x
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enabled neon_clobber_test &&
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check_ldflags -Wl,--wrap,avcodec_open2 \
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-Wl,--wrap,avcodec_decode_audio4 \
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-Wl,--wrap,avcodec_decode_video2 \
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-Wl,--wrap,avcodec_decode_subtitle2 \
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-Wl,--wrap,avcodec_encode_audio2 \
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-Wl,--wrap,avcodec_encode_video2 \
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-Wl,--wrap,avcodec_encode_subtitle ||
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disable neon_clobber_test
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enabled xmm_clobber_test &&
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check_ldflags -Wl,--wrap,avcodec_open2 \
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-Wl,--wrap,avcodec_decode_audio4 \
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@ -23,6 +23,7 @@ OBJS-$(CONFIG_HPELDSP) += arm/hpeldsp_init_arm.o \
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arm/hpeldsp_arm.o
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OBJS-$(CONFIG_MPEGAUDIODSP) += arm/mpegaudiodsp_init_arm.o
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OBJS-$(CONFIG_MPEGVIDEO) += arm/mpegvideo_arm.o
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OBJS-$(CONFIG_NEON_CLOBBER_TEST) += arm/neontest.o
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OBJS-$(CONFIG_VC1_DECODER) += arm/vc1dsp_init_arm.o
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OBJS-$(CONFIG_VORBIS_DECODER) += arm/vorbisdsp_init_arm.o
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OBJS-$(CONFIG_VP3DSP) += arm/vp3dsp_init_arm.o
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79
libavcodec/arm/neontest.c
Normal file
79
libavcodec/arm/neontest.c
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@ -0,0 +1,79 @@
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/*
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* check NEON registers for clobbers
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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 "libavcodec/avcodec.h"
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#include "libavutil/arm/neontest.h"
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wrap(avcodec_open2(AVCodecContext *avctx,
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AVCodec *codec,
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AVDictionary **options))
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{
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testneonclobbers(avcodec_open2, avctx, codec, options);
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}
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wrap(avcodec_decode_audio4(AVCodecContext *avctx,
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AVFrame *frame,
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int *got_frame_ptr,
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AVPacket *avpkt))
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{
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testneonclobbers(avcodec_decode_audio4, avctx, frame,
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got_frame_ptr, avpkt);
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}
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wrap(avcodec_decode_video2(AVCodecContext *avctx,
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AVFrame *picture,
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int *got_picture_ptr,
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AVPacket *avpkt))
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{
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testneonclobbers(avcodec_decode_video2, avctx, picture,
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got_picture_ptr, avpkt);
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}
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wrap(avcodec_decode_subtitle2(AVCodecContext *avctx,
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AVSubtitle *sub,
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int *got_sub_ptr,
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AVPacket *avpkt))
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{
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testneonclobbers(avcodec_decode_subtitle2, avctx, sub,
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got_sub_ptr, avpkt);
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}
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wrap(avcodec_encode_audio2(AVCodecContext *avctx,
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AVPacket *avpkt,
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const AVFrame *frame,
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int *got_packet_ptr))
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{
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testneonclobbers(avcodec_encode_audio2, avctx, avpkt, frame,
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got_packet_ptr);
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}
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wrap(avcodec_encode_subtitle(AVCodecContext *avctx,
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uint8_t *buf, int buf_size,
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const AVSubtitle *sub))
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{
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testneonclobbers(avcodec_encode_subtitle, avctx, buf, buf_size, sub);
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}
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wrap(avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
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const AVFrame *frame, int *got_packet_ptr))
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{
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testneonclobbers(avcodec_encode_video2, avctx, avpkt, frame, got_packet_ptr);
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}
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62
libavutil/arm/neontest.h
Normal file
62
libavutil/arm/neontest.h
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@ -0,0 +1,62 @@
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/*
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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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