From 6c5433c8364d118e32fdf8a8029eaabef8ac9563 Mon Sep 17 00:00:00 2001
From: Yaowu Xu <yaowu@google.com>
Date: Mon, 26 Aug 2013 09:21:12 -0700
Subject: [PATCH] Fix the reading of too many input pixels
in VP9_get4x4var_mmx
Change-Id: I4b4a8f45f25ebdfad281f169cc87aba5e2d6f227
---
vp9/encoder/x86/vp9_variance_impl_mmx.asm | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/vp9/encoder/x86/vp9_variance_impl_mmx.asm b/vp9/encoder/x86/vp9_variance_impl_mmx.asm
index d3dbefed82..3501cf1fde 100644
--- a/vp9/encoder/x86/vp9_variance_impl_mmx.asm
+++ b/vp9/encoder/x86/vp9_variance_impl_mmx.asm
@@ -342,8 +342,8 @@ sym(vp9_get4x4var_mmx):
movsxd rdx, dword ptr arg(3) ;[recon_stride]
; Row 1
- movq mm0, [rax] ; Copy eight bytes to mm0
- movq mm1, [rbx] ; Copy eight bytes to mm1
+ movd mm0, [rax] ; Copy 4 bytes to mm0
+ movd mm1, [rbx] ; Copy 4 bytes to mm1
punpcklbw mm0, mm6 ; unpack to higher prrcision
punpcklbw mm1, mm6
psubsw mm0, mm1 ; A-B (low order) to MM0
@@ -351,12 +351,12 @@ sym(vp9_get4x4var_mmx):
pmaddwd mm0, mm0 ; square and accumulate
add rbx,rdx ; Inc pointer into ref data
add rax,rcx ; Inc pointer into the new data
- movq mm1, [rbx] ; Copy eight bytes to mm1
+ movd mm1, [rbx] ; Copy 4 bytes to mm1
paddd mm7, mm0 ; accumulate in mm7
; Row 2
- movq mm0, [rax] ; Copy eight bytes to mm0
+ movd mm0, [rax] ; Copy 4 bytes to mm0
punpcklbw mm0, mm6 ; unpack to higher prrcision
punpcklbw mm1, mm6
psubsw mm0, mm1 ; A-B (low order) to MM0
@@ -365,11 +365,11 @@ sym(vp9_get4x4var_mmx):
pmaddwd mm0, mm0 ; square and accumulate
add rbx,rdx ; Inc pointer into ref data
add rax,rcx ; Inc pointer into the new data
- movq mm1, [rbx] ; Copy eight bytes to mm1
+ movd mm1, [rbx] ; Copy 4 bytes to mm1
paddd mm7, mm0 ; accumulate in mm7
; Row 3
- movq mm0, [rax] ; Copy eight bytes to mm0
+ movd mm0, [rax] ; Copy 4 bytes to mm0
punpcklbw mm0, mm6 ; unpack to higher prrcision
punpcklbw mm1, mm6
psubsw mm0, mm1 ; A-B (low order) to MM0
@@ -378,11 +378,11 @@ sym(vp9_get4x4var_mmx):
pmaddwd mm0, mm0 ; square and accumulate
add rbx,rdx ; Inc pointer into ref data
add rax,rcx ; Inc pointer into the new data
- movq mm1, [rbx] ; Copy eight bytes to mm1
+ movd mm1, [rbx] ; Copy 4 bytes to mm1
paddd mm7, mm0 ; accumulate in mm7
; Row 4
- movq mm0, [rax] ; Copy eight bytes to mm0
+ movd mm0, [rax] ; Copy 4 bytes to mm0
punpcklbw mm0, mm6 ; unpack to higher prrcision
punpcklbw mm1, mm6
--
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