From e18c39005ad1dbb178b336f691da1de91afd434e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
Date: Tue, 10 Jan 2017 16:49:13 +0200
Subject: [PATCH] arm: vp9lpf: Interleave the start of flat8in into the
calculation above
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This adds lots of extra .ifs, but speeds it up by a couple cycles,
by avoiding stalls.
Signed-off-by: Martin Storsjö <martin@martin.st>
---
libavcodec/arm/vp9lpf_neon.S | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/libavcodec/arm/vp9lpf_neon.S b/libavcodec/arm/vp9lpf_neon.S
index c2f1c954274..1e161e0c63d 100644
--- a/libavcodec/arm/vp9lpf_neon.S
+++ b/libavcodec/arm/vp9lpf_neon.S
@@ -182,16 +182,20 @@
vmovl.u8 q0, d22 @ p1
vmovl.u8 q1, d25 @ q1
+.if \wd >= 8
+ vmov r2, r3, d6
+.endif
vaddw.s8 q0, q0, \tmp3 @ p1 + f
vsubw.s8 q1, q1, \tmp3 @ q1 - f
+.if \wd >= 8
+ orrs r2, r2, r3
+.endif
vqmovun.s16 d0, q0 @ out p1
vqmovun.s16 d2, q1 @ out q1
vbit d22, d0, d5 @ if (!hev && fm && !flat8in)
vbit d25, d2, d5
.if \wd >= 8
- vmov r2, r3, d6
- orrs r2, r2, r3
@ If no pixels need flat8in, jump to flat8out
@ (or to a writeout of the inner 4 pixels, for wd=8)
beq 6f
--
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