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| author | Martin Storsjö <martin@martin.st> | 2017-02-23 23:33:58 +0200 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2017-03-11 13:14:50 +0200 |
| commit | f32690a298badbf2df66319e9b38236ad3d3e321 (patch) | |
| tree | 63a763f839fd8739fd459c72293b6aee9a0e674d | |
| parent | 3fbbad29847c79f422128ad88f174c53a5f6c449 (diff) | |
| download | ffmpeg-f32690a298badbf2df66319e9b38236ad3d3e321.tar.gz | |
aarch64: vp9lpf: Use dup+rev16+uzp1 instead of dup+lsr+dup+trn1
This is one cycle faster in total, and three instructions fewer.
Before:
vp9_loop_filter_mix2_v_44_16_neon: 123.2
After:
vp9_loop_filter_mix2_v_44_16_neon: 122.2
This is cherrypicked from libav commit
3bf9c48320f25f3d5557485b0202f22ae60748b0.
Signed-off-by: Martin Storsjö <martin@martin.st>
| -rw-r--r-- | libavcodec/aarch64/vp9lpf_neon.S | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/libavcodec/aarch64/vp9lpf_neon.S b/libavcodec/aarch64/vp9lpf_neon.S index a9eea7f951..0878763020 100644 --- a/libavcodec/aarch64/vp9lpf_neon.S +++ b/libavcodec/aarch64/vp9lpf_neon.S @@ -162,18 +162,15 @@ dup v2\sz, w3 // I dup v3\sz, w4 // H .else - dup v0.8b, w2 // E - dup v2.8b, w3 // I - dup v3.8b, w4 // H - lsr w5, w2, #8 - lsr w6, w3, #8 - lsr w7, w4, #8 - dup v1.8b, w5 // E - dup v4.8b, w6 // I - dup v5.8b, w7 // H - trn1 v0.2d, v0.2d, v1.2d - trn1 v2.2d, v2.2d, v4.2d - trn1 v3.2d, v3.2d, v5.2d + dup v0.8h, w2 // E + dup v2.8h, w3 // I + dup v3.8h, w4 // H + rev16 v1.16b, v0.16b // E + rev16 v4.16b, v2.16b // I + rev16 v5.16b, v3.16b // H + uzp1 v0.16b, v0.16b, v1.16b + uzp1 v2.16b, v2.16b, v4.16b + uzp1 v3.16b, v3.16b, v5.16b .endif uabd v4\sz, v20\sz, v21\sz // abs(p3 - p2) |