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x86/vf_blend: Move multiplying to a macro

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Reviewed-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Timothy Gu 2016-02-09 01:59:46 +00:00
parent 5486d7fa91
commit c8b1612af0
1 changed files with 10 additions and 6 deletions
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16
libavfilter/x86/vf_blend.asm
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@ -102,6 +102,15 @@ BLEND_INIT difference128, 4
jl .loop
BLEND_END
%macro MULTIPLY 3 ; a, b, pw_1
pmullw %1, %2 ; xxxxxxxx a * b
paddw %1, %3
mova %2, %1
psrlw %2, 8
paddw %1, %2
psrlw %1, 8 ; 00xx00xx a * b / 255
%endmacro
BLEND_INIT multiply, 4
pxor m2, m2
mova m3, [pw_1]
@ -116,12 +125,7 @@ BLEND_INIT multiply, 4
punpcklbw m0, m2 ; 00xx00xx
punpcklbw m1, m2
pmullw m0, m1 ; xxxxxxxx a * b
paddw m0, m3
mova m1, m0
psrlw m1, 8
paddw m0, m1
psrlw m0, 8 ; 00xx00xx a * b / 255
MULTIPLY m0, m1, m3
packuswb m0, m0 ; 0000xxxx
movh [dstq + xq], m0