From 388e0d2515bc6bbc9d0c9af1d230bd16cf945fe7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
Date: Sat, 17 Dec 2016 13:14:38 +0200
Subject: [PATCH] aarch64: vp9mc: Calculate less unused data in the 4 pixel
wide horizontal filter
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No measured speedup on a Cortex A53, but other cores might benefit.
Signed-off-by: Martin Storsjö <martin@martin.st>
---
libavcodec/aarch64/vp9mc_neon.S | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/libavcodec/aarch64/vp9mc_neon.S b/libavcodec/aarch64/vp9mc_neon.S
index 99f18092709..95ed26c2325 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]
-.else
+.elseif \size == 8
mla \dst1\().8h, v20.8h, v0.h[\offset]
mla \dst3\().8h, v22.8h, v0.h[\offset]
+.else
+ mla \dst1\().4h, v20.4h, v0.h[\offset]
+ mla \dst3\().4h, v22.4h, v0.h[\offset]
.endif
.endm
// 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]
-.else
+.elseif \size == 8
mul v20.8h, v20.8h, v0.h[\offset]
mul v22.8h, v22.8h, v0.h[\offset]
+.else
+ mul v20.4h, v20.4h, v0.h[\offset]
+ mul v22.4h, v22.4h, v0.h[\offset]
.endif
+.if \size == 4
+ sqadd \dst1\().4h, \dst1\().4h, v20.4h
+ sqadd \dst3\().4h, \dst3\().4h, v22.4h
+.else
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
.endif
+.endif
.endm
--
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