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${ noResults }
5 Commits (6359b2ce038ef596f1e81b4c1238512d6d5df920)
| Author | SHA1 | Message | Date |
|---|---|---|---|
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 |