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Fix horizontal/horizontal_up 8x8l intra prediction x86/simd functions.

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The original functions did not work correctly for edge pixels, e.g.
when CODEC_FLAG_EMU_EDGE is set, leading to corrupt output in e.g. VLC.
Based on a patch by Daniel Kang <daniel d kang gmail com>.

Signed-off-by: Ronald S. Bultje <rsbultje gmail com>
This commit is contained in:
Ronald S. Bultje 2011-01-19 20:30:18 -05:00
parent c3897d7690
commit b9c7f66e6d
1 changed files with 10 additions and 22 deletions
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32
libavcodec/x86/h264_intrapred.asm
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@ -1249,7 +1249,10 @@ cglobal pred8x8l_horizontal_%1, 4,4
sub r0, r3
lea r2, [r0+r3*2]
movq mm0, [r0+r3*1-8]
punpckhbw mm0, [r0+r3*0-8]
test r1, r1
lea r1, [r0+r3]
cmovnz r1, r0
punpckhbw mm0, [r1+r3*0-8]
movq mm1, [r2+r3*1-8]
punpckhbw mm1, [r0+r3*2-8]
mov r2, r0
@ -1264,21 +1267,12 @@ cglobal pred8x8l_horizontal_%1, 4,4
punpckhdq mm3, mm1
lea r0, [r0+r3*2]
movq mm0, [r0+r3*0-8]
movq mm1, [r2]
movq mm1, [r1+r3*0-8]
mov r0, r2
movq mm4, mm3
movq mm2, mm3
PALIGNR mm4, mm0, 7, mm0
PALIGNR mm1, mm2, 1, mm2
test r1, r1 ; top_left
jnz .do_left
.fix_lt_1:
movq mm5, mm3
pxor mm5, mm4
psrlq mm5, 56
psllq mm5, 48
pxor mm1, mm5
.do_left:
movq mm0, mm4
PRED4x4_LOWPASS mm2, mm1, mm4, mm3, mm5
movq mm4, mm0
@ -2153,7 +2147,10 @@ cglobal pred8x8l_horizontal_up_%1, 4,4
sub r0, r3
lea r2, [r0+r3*2]
movq mm0, [r0+r3*1-8]
punpckhbw mm0, [r0+r3*0-8]
test r1, r1
lea r1, [r0+r3]
cmovnz r1, r0
punpckhbw mm0, [r1+r3*0-8]
movq mm1, [r2+r3*1-8]
punpckhbw mm1, [r0+r3*2-8]
mov r2, r0
@ -2168,21 +2165,12 @@ cglobal pred8x8l_horizontal_up_%1, 4,4
punpckhdq mm3, mm1
lea r0, [r0+r3*2]
movq mm0, [r0+r3*0-8]
movq mm1, [r2]
movq mm1, [r1+r3*0-8]
mov r0, r2
movq mm4, mm3
movq mm2, mm3
PALIGNR mm4, mm0, 7, mm0
PALIGNR mm1, mm2, 1, mm2
test r1, r1
jnz .do_left
.fix_lt_1:
movq mm5, mm3
pxor mm5, mm4
psrlq mm5, 56
psllq mm5, 48
pxor mm1, mm5
.do_left:
movq mm0, mm4
PRED4x4_LOWPASS mm2, mm1, mm4, mm3, mm5
movq mm4, mm0