ref: 4fbc1210ed81705b14f00f02c4508a0c413b04dc
parent: 272c82c13a463acd0418ab04a5facebe75231e1e
author: Yunqing Wang <yunqingwang@google.com>
date: Wed Nov 20 07:52:56 EST 2013
Correct ssse3 8/16-pixel wide sub-pixel filter calculation Although no mismatch was indicated for 8/16 wide sub-pixel filters in issue 661, they had similar problems that could cause mismatch potentially. This patch fixed calculations in HORIZx8/16 and VERTx8/16. Change-Id: Ib85412d690bea5609a51f0e50e7c858406b8ff9e
--- a/vp9/common/x86/vp9_subpixel_8t_ssse3.asm
+++ b/vp9/common/x86/vp9_subpixel_8t_ssse3.asm
@@ -158,10 +158,13 @@
pmaddubsw xmm6, k6k7
paddsw xmm0, xmm6
- paddsw xmm0, xmm2
+ movdqa xmm1, xmm2
+ pmaxsw xmm2, xmm4
+ pminsw xmm4, xmm1
paddsw xmm0, xmm4
- paddsw xmm0, krd
+ paddsw xmm0, xmm2
+ paddsw xmm0, krd
psraw xmm0, 7
packuswb xmm0, xmm0
@@ -243,10 +246,13 @@
pmaddubsw xmm6, k6k7
paddsw xmm0, xmm6
- paddsw xmm0, xmm2
+ movdqa xmm1, xmm2
+ pmaxsw xmm2, xmm4
+ pminsw xmm4, xmm1
paddsw xmm0, xmm4
- paddsw xmm0, krd
+ paddsw xmm0, xmm2
+ paddsw xmm0, krd
psraw xmm0, 7
packuswb xmm0, xmm0
%if %1
@@ -635,9 +641,13 @@
pmaddubsw %3, k4k5
pmaddubsw %4, k6k7
- paddsw %1, %2
paddsw %1, %4
+ movdqa %4, %2
+ pmaxsw %2, %3
+ pminsw %3, %4
paddsw %1, %3
+ paddsw %1, %2
+
paddsw %1, krd
psraw %1, 7
packuswb %1, %1
@@ -783,12 +793,19 @@
pmaddubsw xmm6, k4k5
pmaddubsw xmm7, k6k7
- paddsw xmm0, xmm1
paddsw xmm0, xmm3
+ movdqa xmm3, xmm1
+ pmaxsw xmm1, xmm2
+ pminsw xmm2, xmm3
paddsw xmm0, xmm2
- paddsw xmm4, xmm5
+ paddsw xmm0, xmm1
+
paddsw xmm4, xmm7
+ movdqa xmm7, xmm5
+ pmaxsw xmm5, xmm6
+ pminsw xmm6, xmm7
paddsw xmm4, xmm6
+ paddsw xmm4, xmm5
paddsw xmm0, krd
paddsw xmm4, krd