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authorChristophe GISQUET <christophe.gisquet@gmail.com>2012-03-26 02:29:09 +0200
committerRonald S. Bultje <rsbultje@gmail.com>2012-04-04 11:23:36 -0700
commitf9888520cc853fe27cbe6f3827b2723c63299a4f (patch)
tree77747537d168b837303395b2b85e54bebdeaa0ee /libavcodec/x86/vp8dsp.asm
parent7756859a313497c3cfb33ab2bd3feb168c55d917 (diff)
vp8dsp x86: perform rounding shift with a single instruction
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
Diffstat (limited to 'libavcodec/x86/vp8dsp.asm')
-rw-r--r--libavcodec/x86/vp8dsp.asm18
1 files changed, 8 insertions, 10 deletions
diff --git a/libavcodec/x86/vp8dsp.asm b/libavcodec/x86/vp8dsp.asm
index 4cfeb3e330..82f21fefae 100644
--- a/libavcodec/x86/vp8dsp.asm
+++ b/libavcodec/x86/vp8dsp.asm
@@ -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