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Commit Graph

7 Commits (a9e55f409f2f7e6b32d5b6cc1dd67ed454cafbca)

Author	SHA1	Message	Date
Martin Storsjö	a76b409dd0	aarch64: Reindent all assembly to 8/24 column indentation ... libavcodec/aarch64/vc1dsp_neon.S is skipped here, as it intentionally uses a layered indentation style to visually show how different unrolled/interleaved phases fit together. Signed-off-by: Martin Storsjö <martin@martin.st>	1 year ago
Martin Storsjö	184103b310	aarch64: Consistently use lowercase for vector element specifiers ... Signed-off-by: Martin Storsjö <martin@martin.st>	1 year ago
Swinney, Jonathan	0d7caa5b09	swscale/aarch64: add vscale specializations ... This commit adds new code paths for vscale when filterSize is 2, 4, or 8. By using specialized code with unrolling to match the filterSize we can improve performance. On AWS c7g (Graviton 3, Neoverse V1) instances: before after yuv2yuvX_2_0_512_accurate_neon: 558.8 268.9 yuv2yuvX_4_0_512_accurate_neon: 637.5 434.9 yuv2yuvX_8_0_512_accurate_neon: 1144.8 806.2 yuv2yuvX_16_0_512_accurate_neon: 2080.5 1853.7 Signed-off-by: Jonathan Swinney <jswinney@amazon.com> Signed-off-by: Martin Storsjö <martin@martin.st>	2 years ago
Swinney, Jonathan	3e708722a2	swscale/aarch64: vscale optimization ... Use scalar times vector multiply accumlate instructions instead of vector times vector to remove the need for replicating load instructions which are slightly slower. On AWS c7g (Graviton 3, Neoverse V1) instances: yuv2yuvX_8_0_512_accurate_neon: 1144.8 987.4 yuv2yuvX_16_0_512_accurate_neon: 2080.5 1869.4 Signed-off-by: Jonathan Swinney <jswinney@amazon.com> Signed-off-by: Martin Storsjö <martin@martin.st>	2 years ago
Martin Storsjö	9025d5c5ce	swscale: aarch64: Don't clobber callee-saved registers v8-v15 ... Signed-off-by: Martin Storsjö <martin@martin.st>	5 years ago
Sebastian Pop	c3a17ffff6	swscale/aarch64: use multiply accumulate and shift-right narrow ... This patch rewrites the innermost loop of ff_yuv2planeX_8_neon to avoid zips and horizontal adds by using fused multiply adds. The patch also uses ld1r to load one element and replicate it across all lanes of the vector. The patch also improves the clipping code by removing the shift right instructions and performing the shift with the shift-right narrow instructions. I see 8% difference on an m6g instance with neoverse-n1 CPUs: $ ffmpeg -nostats -f lavfi -i testsrc2=4k:d=2 -vf bench=start,scale=1024x1024,bench=stop -f null - before: t:0.014015 avg:0.014096 max:0.015018 min:0.013971 after: t:0.012985 avg:0.013013 max:0.013996 min:0.012818 Tested with `make check` on aarch64-linux. Signed-off-by: Sebastian Pop <spop@amazon.com> Reviewed-by: Clément Bœsch <u@pkh.me> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	5 years ago
Clément Bœsch	c921f4f687	sws/aarch64: add ff_yuv2planeX_8_neon	9 years ago