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Commit Graph

5 Commits (24bc6ea28f5b6a3f0c2afe0ab4460cc9d75beff4)

Author	SHA1	Message	Date
Martin Storsjö	9025d5c5ce	swscale: aarch64: Don't clobber callee-saved registers v8-v15 ... Signed-off-by: Martin Storsjö <martin@martin.st>	5 years ago
Martin Storsjö	872790b1f9	swscale: aarch64: Avoid using the x18 register ... The x18 is a reserved platform register on Darwin and Windows. x8/w8 seems to be unused in this function though (and same about x10 and x14), so there's really no reason to use x18 here - just change the uses of x18/w18 into x8/w8 instead without any further rewrites. Signed-off-by: Martin Storsjö <martin@martin.st>	5 years ago
Sebastian Pop	bd83191271	swscale/aarch64: use multiply accumulate and increase vector factor to 4 ... This patch implements ff_hscale_8_to_15_neon with NEON fused multiply accumulate and bumps the vectorization factor from 2 to 4. The speedup is of 25% on Graviton1 A1 instances based on A-72 cpus: $ ffmpeg -nostats -f lavfi -i testsrc2=4k:d=2 -vf bench=start,scale=1024x1024,bench=stop -f null - before: t:0.040303 avg:0.040287 max:0.040371 min:0.039214 after: t:0.032168 avg:0.032215 max:0.033081 min:0.032146 The speedup is of 39% on Graviton2 m6g instances based on Neoverse-N1 cpus: $ ffmpeg -nostats -f lavfi -i testsrc2=4k:d=2 -vf bench=start,scale=1024x1024,bench=stop -f null - before: t:0.019446 avg:0.019423 max:0.019493 min:0.019181 after: t:0.014015 avg:0.014096 max:0.015018 min:0.013971 Tested with `make check` on aarch64-linux. Signed-off-by: Sebastian Pop <spop@amazon.com> Reviewed-by: Jean-Baptiste Kempf <jb@videolan.org> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	5 years ago
Clément Bœsch	040598218f	sws/aarch64: restore ff_hscale_8_to_15_neon() ... Fix final scaling and required filter alignment. Pass FATE.	9 years ago
Clément Bœsch	263eb76bdf	sws/aarch64: add ff_hscale_8_to_15_neon ... ./ffmpeg -nostats -f lavfi -i testsrc2=4k:d=2 -vf bench=start,scale=1024x1024,bench=stop -f null - before: t:0.489726 avg:0.489883 max:0.491852 min:0.489482 after: t:0.256515 avg:0.256458 max:0.256999 min:0.253755	9 years ago