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[FFmpeg-devel,17/34] aarch64: vp9mc: Calculate less unused data in the 4 pixel wide horizontal filter

Message ID 1488967274-8143-17-git-send-email-martin@martin.st
State Accepted
Commit 388e0d2515bc6bbc9d0c9af1d230bd16cf945fe7
Headers show

Commit Message

Martin Storsjö March 8, 2017, 10 a.m. UTC
No measured speedup on a Cortex A53, but other cores might benefit.

This is cherrypicked from libav commit
 libavcodec/aarch64/vp9mc_neon.S | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)
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diff --git a/libavcodec/aarch64/vp9mc_neon.S b/libavcodec/aarch64/vp9mc_neon.S
index 9403911..82a0f53 100644
--- a/libavcodec/aarch64/vp9mc_neon.S
+++ b/libavcodec/aarch64/vp9mc_neon.S
@@ -202,9 +202,12 @@  endfunc
         ext             v23.16b, \src5\().16b, \src6\().16b, #(2*\offset)
         mla             \dst2\().8h, v21.8h, v0.h[\offset]
         mla             \dst4\().8h, v23.8h, v0.h[\offset]
+.elseif \size == 8
         mla             \dst1\().8h, v20.8h, v0.h[\offset]
         mla             \dst3\().8h, v22.8h, v0.h[\offset]
+        mla             \dst1\().4h, v20.4h, v0.h[\offset]
+        mla             \dst3\().4h, v22.4h, v0.h[\offset]
 // The same as above, but don't accumulate straight into the
@@ -219,16 +222,24 @@  endfunc
         ext             v23.16b, \src5\().16b, \src6\().16b, #(2*\offset)
         mul             v21.8h, v21.8h, v0.h[\offset]
         mul             v23.8h, v23.8h, v0.h[\offset]
+.elseif \size == 8
         mul             v20.8h, v20.8h, v0.h[\offset]
         mul             v22.8h, v22.8h, v0.h[\offset]
+        mul             v20.4h, v20.4h, v0.h[\offset]
+        mul             v22.4h, v22.4h, v0.h[\offset]
+.if \size == 4
+        sqadd           \dst1\().4h, \dst1\().4h, v20.4h
+        sqadd           \dst3\().4h, \dst3\().4h, v22.4h
         sqadd           \dst1\().8h, \dst1\().8h, v20.8h
         sqadd           \dst3\().8h, \dst3\().8h, v22.8h
 .if \size >= 16
         sqadd           \dst2\().8h, \dst2\().8h, v21.8h
         sqadd           \dst4\().8h, \dst4\().8h, v23.8h