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| author | Janne Grunau <janne-libav@jannau.net> | 2017-01-10 00:15:08 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-01-14 21:13:10 +0100 |
| commit | cb220eeef9bfe889769dc4e08248b0a59d24e2a9 (patch) | |
| tree | 360d1f990ba862736164ac013667aef41effe3c1 /libavcodec | |
| parent | 62ea07d797c503bc4b727e56d9c0f914a93c8ef6 (diff) | |
| download | ffmpeg-cb220eeef9bfe889769dc4e08248b0a59d24e2a9.tar.gz | |
aarch64: vp9: loop filter: replace 'orr; cbn?z' with 'adds; b.{eq,ne};
The latter is 1 cycle faster on a cortex-53 and since the operands are
bytewise (or larger) bitmask (impossible to overflow to zero) both are
equivalent.
This is cherrypicked from libav commit
e7ae8f7a715843a5089d18e033afb3ee19ab3057.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/aarch64/vp9lpf_neon.S | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/libavcodec/aarch64/vp9lpf_neon.S b/libavcodec/aarch64/vp9lpf_neon.S index 78aae61e87..55e1964c47 100644 --- a/libavcodec/aarch64/vp9lpf_neon.S +++ b/libavcodec/aarch64/vp9lpf_neon.S @@ -218,13 +218,15 @@ xtn_sz v5, v6.8h, v7.8h, \sz and v4\sz, v4\sz, v5\sz // fm + // If no pixels need filtering, just exit as soon as possible mov x5, v4.d[0] .ifc \sz, .16b mov x6, v4.d[1] - orr x5, x5, x6 -.endif - // If no pixels need filtering, just exit as soon as possible + adds x5, x5, x6 + b.eq 9f +.else cbz x5, 9f +.endif .if \wd >= 8 movi v0\sz, #1 @@ -344,15 +346,17 @@ bit v22\sz, v0\sz, v5\sz // if (!hev && fm && !flat8in) bit v25\sz, v2\sz, v5\sz + // If no pixels need flat8in, jump to flat8out + // (or to a writeout of the inner 4 pixels, for wd=8) .if \wd >= 8 mov x5, v6.d[0] .ifc \sz, .16b mov x6, v6.d[1] - orr x5, x5, x6 -.endif - // If no pixels need flat8in, jump to flat8out - // (or to a writeout of the inner 4 pixels, for wd=8) + adds x5, x5, x6 + b.eq 6f +.else cbz x5, 6f +.endif // flat8in uaddl_sz \tmp1\().8h, \tmp2\().8h, v20, v21, \sz @@ -406,20 +410,25 @@ mov x5, v2.d[0] .ifc \sz, .16b mov x6, v2.d[1] - orr x5, x5, x6 + adds x5, x5, x6 + b.ne 1f +.else + cbnz x5, 1f .endif // If no pixels needed flat8in nor flat8out, jump to a // writeout of the inner 4 pixels - cbnz x5, 1f br x14 1: + mov x5, v7.d[0] .ifc \sz, .16b mov x6, v7.d[1] - orr x5, x5, x6 + adds x5, x5, x6 + b.ne 1f +.else + cbnz x5, 1f .endif // If no pixels need flat8out, jump to a writeout of the inner 6 pixels - cbnz x5, 1f br x15 1: |