ref: 6c5433c8364d118e32fdf8a8029eaabef8ac9563
parent: 66ccf5ddcfd16b59e3ed3b36592fb0bd772eaa45
author: Yaowu Xu <yaowu@google.com>
date: Mon Aug 26 05:21:12 EDT 2013
Fix the reading of too many input pixels in VP9_get4x4var_mmx Change-Id: I4b4a8f45f25ebdfad281f169cc87aba5e2d6f227
--- a/vp9/encoder/x86/vp9_variance_impl_mmx.asm
+++ b/vp9/encoder/x86/vp9_variance_impl_mmx.asm
@@ -342,8 +342,8 @@
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 @@
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 @@
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 @@
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