ref: fd3078fd8fe7b64a70ac740d8302cb457a295115
parent: 5ed84c2fdf420478c19e1c64982a306159077a8d
author: John Koleszar <jkoleszar@google.com>
date: Tue Oct 23 06:59:05 EDT 2012
postproc_sse2: avoid reading off the end of the limits array Rather than unconditionally reading in the next MB's limits, test the loop exit condition first. Change-Id: I105d1e92698fb5561aa87160816787604aed03a2
--- a/vp8/common/x86/postproc_sse2.asm
+++ b/vp8/common/x86/postproc_sse2.asm
@@ -140,12 +140,13 @@
add rsi, 16
add rdi, 16
- UPDATE_FLIMIT
-
add rdx, 16
cmp edx, dword arg(4) ;cols
- jl .nextcol
+ jge .downdone
+ UPDATE_FLIMIT
+ jmp .nextcol
+.downdone:
; done with the all cols, start the across filtering in place
sub rsi, rdx
sub rdi, rdx
@@ -191,12 +192,13 @@
psrldq xmm0, 8
movdq2q mm1, xmm0
- UPDATE_FLIMIT
-
add rdx, 16
cmp edx, dword arg(4) ;cols
- jl .acrossnextcol;
+ jge .acrossdone
+ UPDATE_FLIMIT
+ jmp .acrossnextcol
+.acrossdone
; last 16 pixels
movq QWORD PTR [rdi+rdx-16], mm0