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vp8dsp x86: perform rounding shift with a single instruction

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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
This commit is contained in:
Christophe GISQUET 2012-03-26 02:29:09 +02:00 committed by Ronald S. Bultje
parent 7756859a31
commit f9888520cc
1 changed files with 8 additions and 10 deletions
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18
libavcodec/x86/vp8dsp.asm
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@ -144,6 +144,8 @@ filter_h6_shuf1: db 0, 5, 1, 6, 2, 7, 3, 8, 4, 9, 5, 10, 6, 11, 7, 12
filter_h6_shuf2: db 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9
filter_h6_shuf3: db 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11
pw_256: times 8 dw 256
pw_20091: times 4 dw 20091
pw_17734: times 4 dw 17734
@ -205,8 +207,7 @@ cglobal put_vp8_epel%1_h6, 6, 6 + npicregs, 8, dst, dststride, src, srcstride, h
pmaddubsw m2, m7
paddsw m0, m1
paddsw m0, m2
paddsw m0, [pw_64]
psraw m0, 7
pmulhrsw m0, [pw_256]
packuswb m0, m0
movh [dstq], m0 ; store
@ -219,7 +220,7 @@ cglobal put_vp8_epel%1_h6, 6, 6 + npicregs, 8, dst, dststride, src, srcstride, h
cglobal put_vp8_epel%1_h4, 6, 6 + npicregs, 7, dst, dststride, src, srcstride, height, mx, picreg
shl mxd, 4
mova m2, [pw_64]
mova m2, [pw_256]
mova m3, [filter_h2_shuf]
mova m4, [filter_h4_shuf]
%ifdef PIC
@ -235,9 +236,8 @@ cglobal put_vp8_epel%1_h4, 6, 6 + npicregs, 7, dst, dststride, src, srcstride, h
pshufb m1, m4
pmaddubsw m0, m5
pmaddubsw m1, m6
paddsw m0, m2
paddsw m0, m1
psraw m0, 7
pmulhrsw m0, m2
packuswb m0, m0
movh [dstq], m0 ; store
@ -255,7 +255,7 @@ cglobal put_vp8_epel%1_v4, 7, 7, 8, dst, dststride, src, srcstride, height, picr
%endif
mova m5, [fourtap_filter_hb+myq-16]
mova m6, [fourtap_filter_hb+myq]
mova m7, [pw_64]
mova m7, [pw_256]
; read 3 lines
sub srcq, srcstrideq
@ -275,8 +275,7 @@ cglobal put_vp8_epel%1_v4, 7, 7, 8, dst, dststride, src, srcstride, height, picr
pmaddubsw m2, m6
paddsw m4, m2
mova m2, m3
paddsw m4, m7
psraw m4, 7
pmulhrsw m4, m7
packuswb m4, m4
movh [dstq], m4
@ -319,9 +318,8 @@ cglobal put_vp8_epel%1_v6, 7, 7, 8, dst, dststride, src, srcstride, height, picr
paddsw m6, m1
paddsw m6, m7
mova m1, m2
paddsw m6, [pw_64]
mova m2, m3
psraw m6, 7
pmulhrsw m6, [pw_256]
mova m3, m4
packuswb m6, m6
mova m4, m5