[FFmpeg-devel] [PATCH 06/10] swscale/arm/yuv2rgb: only process one line at a time for the yuv420p and nv{12, 21} formats

[Michael Niedermayer]

On Fri, Mar 25, 2016 at 11:46:01PM +0100, Matthieu Bouron wrote:
> From: Matthieu Bouron <matthieu.bouron at stupeflix.com>
> 
> ---
>  libswscale/arm/yuv2rgb_neon.S | 89 ++++++++++++-------------------------------
>  1 file changed, 24 insertions(+), 65 deletions(-)

breaks build

 make distclean ; ../configure --cross-prefix=/usr/arm-linux-gnueabi/bin/ --cc='ccache arm-linux-gnueabi-gcc-4.5' --extra-cflags='-mfpu=neon -mfloat-abi=softfp' --cpu=cortex-a8 --arch=armv7 --target-os=linux --enable-cross-compile && make -j12

CC      libavutil/arm/float_dsp_init_arm.o
src/libswscale/arm/yuv2rgb_neon.S: Assembler messages:
src/libswscale/arm/yuv2rgb_neon.S:269: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0'
src/libswscale/arm/yuv2rgb_neon.S:269: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
src/libswscale/arm/yuv2rgb_neon.S:269: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0'
src/libswscale/arm/yuv2rgb_neon.S:269: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
src/libswscale/arm/yuv2rgb_neon.S:269: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0'
src/libswscale/arm/yuv2rgb_neon.S:269: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
src/libswscale/arm/yuv2rgb_neon.S:269: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0'
src/libswscale/arm/yuv2rgb_neon.S:269: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
src/libswscale/arm/yuv2rgb_neon.S:270: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0'
src/libswscale/arm/yuv2rgb_neon.S:270: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
CC      libavutil/arm/float_dsp_init_vfp.o
src/libswscale/arm/yuv2rgb_neon.S:270: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0'
src/libswscale/arm/yuv2rgb_neon.S:270: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'AS    libavutil/arm/float_dsp_neon.o

CC      libavutil/arm/float_dsp_init_neon.o
src/libswscale/arm/yuv2rgb_neon.S:270: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0'
src/libswscale/arm/yuv2rgb_neon.S:270: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
AS      libavutil/arm/float_dsp_vfp.o
src/libswscale/arm/yuv2rgb_neon.S:270: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0'
src/libswscale/arm/yuv2rgb_neon.S:270: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0,lsr#1'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `subeq r10,r10,r0,lsr#1'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `addne r10,r12'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0,lsr#1'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `subeq r10,r10,r0,lsr#1'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `addne r10,r12'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0,lsr#1'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `subeq r10,r10,r0,lsr#1'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `addne r10,r12'
CC      libavutil/audio_fifo.o
CC      libavutil/avstring.o
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `subeq r6,r6,r0,lsr#1'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `addne r6,r7'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `subeq r10,r10,r0,lsr#1'
src/libswscale/arm/yuv2rgb_neon.S:271: Error: thumb conditional instruction should be in IT block -- `addne r10,r12'
CC      libavutil/base64.o
CC      libavutil/blowfish.o
CC      libavutil/bprint.o
CC      libavutil/buffer.o
CC      libavutil/camellia.o
make: *** [libswscale/arm/yuv2rgb_neon.o] Error 1
make: *** Waiting for unfinished jobs....

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Complexity theory is the science of finding the exact solution to an
approximation. Benchmarking OTOH is finding an approximation of the exact
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