ref: 10164407fbbb3b3d6ad33937f0b8218ceeaccb97
dir: /vpx_dsp/x86/vpx_subpixel_8t_ssse3.asm/
;
; Copyright (c) 2015 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
%include "third_party/x86inc/x86inc.asm"
SECTION_RODATA
pw_64: times 8 dw 64
; %define USE_PMULHRSW
; NOTE: pmulhrsw has a latency of 5 cycles. Tests showed a performance loss
; when using this instruction.
;
; The add order below (based on ffvp9) must be followed to prevent outranges.
; x = k0k1 + k4k5
; y = k2k3 + k6k7
; z = signed SAT(x + y)
SECTION .text
%define LOCAL_VARS_SIZE 16*6
%macro SETUP_LOCAL_VARS 0
; TODO(slavarnway): using xmm registers for these on ARCH_X86_64 +
; pmaddubsw has a higher latency on some platforms, this might be eased by
; interleaving the instructions.
%define k0k1 [rsp + 16*0]
%define k2k3 [rsp + 16*1]
%define k4k5 [rsp + 16*2]
%define k6k7 [rsp + 16*3]
packsswb m4, m4
; TODO(slavarnway): multiple pshufb instructions had a higher latency on
; some platforms.
pshuflw m0, m4, 0b ;k0_k1
pshuflw m1, m4, 01010101b ;k2_k3
pshuflw m2, m4, 10101010b ;k4_k5
pshuflw m3, m4, 11111111b ;k6_k7
punpcklqdq m0, m0
punpcklqdq m1, m1
punpcklqdq m2, m2
punpcklqdq m3, m3
mova k0k1, m0
mova k2k3, m1
mova k4k5, m2
mova k6k7, m3
%if ARCH_X86_64
%define krd m12
%define tmp0 [rsp + 16*4]
%define tmp1 [rsp + 16*5]
mova krd, [GLOBAL(pw_64)]
%else
%define krd [rsp + 16*4]
%if CONFIG_PIC=0
mova m6, [GLOBAL(pw_64)]
%else
; build constants without accessing global memory
pcmpeqb m6, m6 ;all ones
psrlw m6, 15
psllw m6, 6 ;aka pw_64
%endif
mova krd, m6
%endif
%endm
;-------------------------------------------------------------------------------
%if ARCH_X86_64
%define LOCAL_VARS_SIZE_H4 0
%else
%define LOCAL_VARS_SIZE_H4 16*4
%endif
%macro SUBPIX_HFILTER4 1
cglobal filter_block1d4_%1, 6, 6, 11, LOCAL_VARS_SIZE_H4, \
src, sstride, dst, dstride, height, filter
mova m4, [filterq]
packsswb m4, m4
%if ARCH_X86_64
%define k0k1k4k5 m8
%define k2k3k6k7 m9
%define krd m10
mova krd, [GLOBAL(pw_64)]
pshuflw k0k1k4k5, m4, 0b ;k0_k1
pshufhw k0k1k4k5, k0k1k4k5, 10101010b ;k0_k1_k4_k5
pshuflw k2k3k6k7, m4, 01010101b ;k2_k3
pshufhw k2k3k6k7, k2k3k6k7, 11111111b ;k2_k3_k6_k7
%else
%define k0k1k4k5 [rsp + 16*0]
%define k2k3k6k7 [rsp + 16*1]
%define krd [rsp + 16*2]
pshuflw m6, m4, 0b ;k0_k1
pshufhw m6, m6, 10101010b ;k0_k1_k4_k5
pshuflw m7, m4, 01010101b ;k2_k3
pshufhw m7, m7, 11111111b ;k2_k3_k6_k7
%if CONFIG_PIC=0
mova m1, [GLOBAL(pw_64)]
%else
; build constants without accessing global memory
pcmpeqb m1, m1 ;all ones
psrlw m1, 15
psllw m1, 6 ;aka pw_64
%endif
mova k0k1k4k5, m6
mova k2k3k6k7, m7
mova krd, m1
%endif
dec heightd
.loop:
;Do two rows at once
movu m4, [srcq - 3]
movu m5, [srcq + sstrideq - 3]
punpckhbw m1, m4, m4
punpcklbw m4, m4
punpckhbw m3, m5, m5
punpcklbw m5, m5
palignr m0, m1, m4, 1
pmaddubsw m0, k0k1k4k5
palignr m1, m4, 5
pmaddubsw m1, k2k3k6k7
palignr m2, m3, m5, 1
pmaddubsw m2, k0k1k4k5
palignr m3, m5, 5
pmaddubsw m3, k2k3k6k7
punpckhqdq m4, m0, m2
punpcklqdq m0, m2
punpckhqdq m5, m1, m3
punpcklqdq m1, m3
paddsw m0, m4
paddsw m1, m5
%ifidn %1, h8_avg
movd m4, [dstq]
movd m5, [dstq + dstrideq]
%endif
paddsw m0, m1
paddsw m0, krd
psraw m0, 7
packuswb m0, m0
psrldq m1, m0, 4
%ifidn %1, h8_avg
pavgb m0, m4
pavgb m1, m5
%endif
movd [dstq], m0
movd [dstq + dstrideq], m1
lea srcq, [srcq + sstrideq ]
prefetcht0 [srcq + 4 * sstrideq - 3]
lea srcq, [srcq + sstrideq ]
lea dstq, [dstq + 2 * dstrideq ]
prefetcht0 [srcq + 2 * sstrideq - 3]
sub heightd, 2
jg .loop
; Do last row if output_height is odd
jne .done
movu m4, [srcq - 3]
punpckhbw m1, m4, m4
punpcklbw m4, m4
palignr m0, m1, m4, 1
palignr m1, m4, 5
pmaddubsw m0, k0k1k4k5
pmaddubsw m1, k2k3k6k7
psrldq m2, m0, 8
psrldq m3, m1, 8
paddsw m0, m2
paddsw m1, m3
paddsw m0, m1
paddsw m0, krd
psraw m0, 7
packuswb m0, m0
%ifidn %1, h8_avg
movd m4, [dstq]
pavgb m0, m4
%endif
movd [dstq], m0
.done:
REP_RET
%endm
;-------------------------------------------------------------------------------
%macro SUBPIX_HFILTER8 1
cglobal filter_block1d8_%1, 6, 6, 14, LOCAL_VARS_SIZE, \
src, sstride, dst, dstride, height, filter
mova m4, [filterq]
SETUP_LOCAL_VARS
dec heightd
.loop:
;Do two rows at once
movu m0, [srcq - 3]
movu m4, [srcq + sstrideq - 3]
punpckhbw m1, m0, m0
punpcklbw m0, m0
palignr m5, m1, m0, 13
pmaddubsw m5, k6k7
palignr m2, m1, m0, 5
palignr m3, m1, m0, 9
palignr m1, m0, 1
pmaddubsw m1, k0k1
punpckhbw m6, m4, m4
punpcklbw m4, m4
pmaddubsw m2, k2k3
pmaddubsw m3, k4k5
palignr m7, m6, m4, 13
palignr m0, m6, m4, 5
pmaddubsw m7, k6k7
paddsw m1, m3
paddsw m2, m5
paddsw m1, m2
%ifidn %1, h8_avg
movh m2, [dstq]
movhps m2, [dstq + dstrideq]
%endif
palignr m5, m6, m4, 9
palignr m6, m4, 1
pmaddubsw m0, k2k3
pmaddubsw m6, k0k1
paddsw m1, krd
pmaddubsw m5, k4k5
psraw m1, 7
paddsw m0, m7
paddsw m6, m5
paddsw m6, m0
paddsw m6, krd
psraw m6, 7
packuswb m1, m6
%ifidn %1, h8_avg
pavgb m1, m2
%endif
movh [dstq], m1
movhps [dstq + dstrideq], m1
lea srcq, [srcq + sstrideq ]
prefetcht0 [srcq + 4 * sstrideq - 3]
lea srcq, [srcq + sstrideq ]
lea dstq, [dstq + 2 * dstrideq ]
prefetcht0 [srcq + 2 * sstrideq - 3]
sub heightd, 2
jg .loop
; Do last row if output_height is odd
jne .done
movu m0, [srcq - 3]
punpckhbw m3, m0, m0
punpcklbw m0, m0
palignr m1, m3, m0, 1
palignr m2, m3, m0, 5
palignr m4, m3, m0, 13
palignr m3, m0, 9
pmaddubsw m1, k0k1
pmaddubsw m2, k2k3
pmaddubsw m3, k4k5
pmaddubsw m4, k6k7
paddsw m1, m3
paddsw m4, m2
paddsw m1, m4
paddsw m1, krd
psraw m1, 7
packuswb m1, m1
%ifidn %1, h8_avg
movh m0, [dstq]
pavgb m1, m0
%endif
movh [dstq], m1
.done:
REP_RET
%endm
;-------------------------------------------------------------------------------
%macro SUBPIX_HFILTER16 1
cglobal filter_block1d16_%1, 6, 6, 14, LOCAL_VARS_SIZE, \
src, sstride, dst, dstride, height, filter
mova m4, [filterq]
SETUP_LOCAL_VARS
.loop:
prefetcht0 [srcq + 2 * sstrideq -3]
movu m0, [srcq - 3]
movu m4, [srcq - 2]
pmaddubsw m0, k0k1
pmaddubsw m4, k0k1
movu m1, [srcq - 1]
movu m5, [srcq + 0]
pmaddubsw m1, k2k3
pmaddubsw m5, k2k3
movu m2, [srcq + 1]
movu m6, [srcq + 2]
pmaddubsw m2, k4k5
pmaddubsw m6, k4k5
movu m3, [srcq + 3]
movu m7, [srcq + 4]
pmaddubsw m3, k6k7
pmaddubsw m7, k6k7
paddsw m0, m2
paddsw m1, m3
paddsw m0, m1
paddsw m4, m6
paddsw m5, m7
paddsw m4, m5
paddsw m0, krd
paddsw m4, krd
psraw m0, 7
psraw m4, 7
packuswb m0, m0
packuswb m4, m4
punpcklbw m0, m4
%ifidn %1, h8_avg
pavgb m0, [dstq]
%endif
lea srcq, [srcq + sstrideq]
mova [dstq], m0
lea dstq, [dstq + dstrideq]
dec heightd
jnz .loop
REP_RET
%endm
INIT_XMM ssse3
SUBPIX_HFILTER16 h8
SUBPIX_HFILTER16 h8_avg
SUBPIX_HFILTER8 h8
SUBPIX_HFILTER8 h8_avg
SUBPIX_HFILTER4 h8
SUBPIX_HFILTER4 h8_avg
;-------------------------------------------------------------------------------
; TODO(Linfeng): Detect cpu type and choose the code with better performance.
%define X86_SUBPIX_VFILTER_PREFER_SLOW_CELERON 1
%if ARCH_X86_64 && X86_SUBPIX_VFILTER_PREFER_SLOW_CELERON
%define NUM_GENERAL_REG_USED 9
%else
%define NUM_GENERAL_REG_USED 6
%endif
%macro SUBPIX_VFILTER 2
cglobal filter_block1d%2_%1, 6, NUM_GENERAL_REG_USED, 15, LOCAL_VARS_SIZE, \
src, sstride, dst, dstride, height, filter
mova m4, [filterq]
SETUP_LOCAL_VARS
%ifidn %2, 8
%define movx movh
%else
%define movx movd
%endif
dec heightd
%if ARCH_X86 || X86_SUBPIX_VFILTER_PREFER_SLOW_CELERON
%if ARCH_X86_64
%define src1q r7
%define sstride6q r8
%define dst_stride dstrideq
%else
%define src1q filterq
%define sstride6q dstrideq
%define dst_stride dstridemp
%endif
mov src1q, srcq
add src1q, sstrideq
lea sstride6q, [sstrideq + sstrideq * 4]
add sstride6q, sstrideq ;pitch * 6
.loop:
;Do two rows at once
movx m0, [srcq ] ;A
movx m1, [src1q ] ;B
punpcklbw m0, m1 ;A B
movx m2, [srcq + sstrideq * 2 ] ;C
pmaddubsw m0, k0k1
mova m6, m2
movx m3, [src1q + sstrideq * 2] ;D
punpcklbw m2, m3 ;C D
pmaddubsw m2, k2k3
movx m4, [srcq + sstrideq * 4 ] ;E
mova m7, m4
movx m5, [src1q + sstrideq * 4] ;F
punpcklbw m4, m5 ;E F
pmaddubsw m4, k4k5
punpcklbw m1, m6 ;A B next iter
movx m6, [srcq + sstride6q ] ;G
punpcklbw m5, m6 ;E F next iter
punpcklbw m3, m7 ;C D next iter
pmaddubsw m5, k4k5
movx m7, [src1q + sstride6q ] ;H
punpcklbw m6, m7 ;G H
pmaddubsw m6, k6k7
pmaddubsw m3, k2k3
pmaddubsw m1, k0k1
paddsw m0, m4
paddsw m2, m6
movx m6, [srcq + sstrideq * 8 ] ;H next iter
punpcklbw m7, m6
pmaddubsw m7, k6k7
paddsw m0, m2
paddsw m0, krd
psraw m0, 7
paddsw m1, m5
packuswb m0, m0
paddsw m3, m7
paddsw m1, m3
paddsw m1, krd
psraw m1, 7
lea srcq, [srcq + sstrideq * 2 ]
lea src1q, [src1q + sstrideq * 2]
packuswb m1, m1
%ifidn %1, v8_avg
movx m2, [dstq]
pavgb m0, m2
%endif
movx [dstq], m0
add dstq, dst_stride
%ifidn %1, v8_avg
movx m3, [dstq]
pavgb m1, m3
%endif
movx [dstq], m1
add dstq, dst_stride
sub heightd, 2
jg .loop
; Do last row if output_height is odd
jne .done
movx m0, [srcq ] ;A
movx m1, [srcq + sstrideq ] ;B
movx m6, [srcq + sstride6q ] ;G
punpcklbw m0, m1 ;A B
movx m7, [src1q + sstride6q ] ;H
pmaddubsw m0, k0k1
movx m2, [srcq + sstrideq * 2 ] ;C
punpcklbw m6, m7 ;G H
movx m3, [src1q + sstrideq * 2] ;D
pmaddubsw m6, k6k7
movx m4, [srcq + sstrideq * 4 ] ;E
punpcklbw m2, m3 ;C D
movx m5, [src1q + sstrideq * 4] ;F
punpcklbw m4, m5 ;E F
pmaddubsw m2, k2k3
pmaddubsw m4, k4k5
paddsw m2, m6
paddsw m0, m4
paddsw m0, m2
paddsw m0, krd
psraw m0, 7
packuswb m0, m0
%ifidn %1, v8_avg
movx m1, [dstq]
pavgb m0, m1
%endif
movx [dstq], m0
%else
; ARCH_X86_64
movx m0, [srcq ] ;A
movx m1, [srcq + sstrideq ] ;B
lea srcq, [srcq + sstrideq * 2 ]
movx m2, [srcq] ;C
movx m3, [srcq + sstrideq] ;D
lea srcq, [srcq + sstrideq * 2 ]
movx m4, [srcq] ;E
movx m5, [srcq + sstrideq] ;F
lea srcq, [srcq + sstrideq * 2 ]
movx m6, [srcq] ;G
punpcklbw m0, m1 ;A B
punpcklbw m1, m2 ;A B next iter
punpcklbw m2, m3 ;C D
punpcklbw m3, m4 ;C D next iter
punpcklbw m4, m5 ;E F
punpcklbw m5, m6 ;E F next iter
.loop:
;Do two rows at once
movx m7, [srcq + sstrideq] ;H
lea srcq, [srcq + sstrideq * 2 ]
movx m14, [srcq] ;H next iter
punpcklbw m6, m7 ;G H
punpcklbw m7, m14 ;G H next iter
pmaddubsw m8, m0, k0k1
pmaddubsw m9, m1, k0k1
mova m0, m2
mova m1, m3
pmaddubsw m10, m2, k2k3
pmaddubsw m11, m3, k2k3
mova m2, m4
mova m3, m5
pmaddubsw m4, k4k5
pmaddubsw m5, k4k5
paddsw m8, m4
paddsw m9, m5
mova m4, m6
mova m5, m7
pmaddubsw m6, k6k7
pmaddubsw m7, k6k7
paddsw m10, m6
paddsw m11, m7
paddsw m8, m10
paddsw m9, m11
mova m6, m14
paddsw m8, krd
paddsw m9, krd
psraw m8, 7
psraw m9, 7
%ifidn %2, 4
packuswb m8, m8
packuswb m9, m9
%else
packuswb m8, m9
%endif
%ifidn %1, v8_avg
movx m7, [dstq]
%ifidn %2, 4
movx m10, [dstq + dstrideq]
pavgb m9, m10
%else
movhpd m7, [dstq + dstrideq]
%endif
pavgb m8, m7
%endif
movx [dstq], m8
%ifidn %2, 4
movx [dstq + dstrideq], m9
%else
movhpd [dstq + dstrideq], m8
%endif
lea dstq, [dstq + dstrideq * 2 ]
sub heightd, 2
jg .loop
; Do last row if output_height is odd
jne .done
movx m7, [srcq + sstrideq] ;H
punpcklbw m6, m7 ;G H
pmaddubsw m0, k0k1
pmaddubsw m2, k2k3
pmaddubsw m4, k4k5
pmaddubsw m6, k6k7
paddsw m0, m4
paddsw m2, m6
paddsw m0, m2
paddsw m0, krd
psraw m0, 7
packuswb m0, m0
%ifidn %1, v8_avg
movx m1, [dstq]
pavgb m0, m1
%endif
movx [dstq], m0
%endif ; ARCH_X86_64
.done:
REP_RET
%endm
;-------------------------------------------------------------------------------
%macro SUBPIX_VFILTER16 1
cglobal filter_block1d16_%1, 6, NUM_GENERAL_REG_USED, 16, LOCAL_VARS_SIZE, \
src, sstride, dst, dstride, height, filter
mova m4, [filterq]
SETUP_LOCAL_VARS
%if ARCH_X86 || X86_SUBPIX_VFILTER_PREFER_SLOW_CELERON
%if ARCH_X86_64
%define src1q r7
%define sstride6q r8
%define dst_stride dstrideq
%else
%define src1q filterq
%define sstride6q dstrideq
%define dst_stride dstridemp
%endif
lea src1q, [srcq + sstrideq]
lea sstride6q, [sstrideq + sstrideq * 4]
add sstride6q, sstrideq ;pitch * 6
.loop:
movh m0, [srcq ] ;A
movh m1, [src1q ] ;B
movh m2, [srcq + sstrideq * 2 ] ;C
movh m3, [src1q + sstrideq * 2] ;D
movh m4, [srcq + sstrideq * 4 ] ;E
movh m5, [src1q + sstrideq * 4] ;F
punpcklbw m0, m1 ;A B
movh m6, [srcq + sstride6q] ;G
punpcklbw m2, m3 ;C D
movh m7, [src1q + sstride6q] ;H
punpcklbw m4, m5 ;E F
pmaddubsw m0, k0k1
movh m3, [srcq + 8] ;A
pmaddubsw m2, k2k3
punpcklbw m6, m7 ;G H
movh m5, [srcq + sstrideq + 8] ;B
pmaddubsw m4, k4k5
punpcklbw m3, m5 ;A B
movh m7, [srcq + sstrideq * 2 + 8] ;C
pmaddubsw m6, k6k7
movh m5, [src1q + sstrideq * 2 + 8] ;D
punpcklbw m7, m5 ;C D
paddsw m2, m6
pmaddubsw m3, k0k1
movh m1, [srcq + sstrideq * 4 + 8] ;E
paddsw m0, m4
pmaddubsw m7, k2k3
movh m6, [src1q + sstrideq * 4 + 8] ;F
punpcklbw m1, m6 ;E F
paddsw m0, m2
paddsw m0, krd
movh m2, [srcq + sstride6q + 8] ;G
pmaddubsw m1, k4k5
movh m5, [src1q + sstride6q + 8] ;H
psraw m0, 7
punpcklbw m2, m5 ;G H
pmaddubsw m2, k6k7
paddsw m7, m2
paddsw m3, m1
paddsw m3, m7
paddsw m3, krd
psraw m3, 7
packuswb m0, m3
add srcq, sstrideq
add src1q, sstrideq
%ifidn %1, v8_avg
pavgb m0, [dstq]
%endif
mova [dstq], m0
add dstq, dst_stride
dec heightd
jnz .loop
REP_RET
%else
; ARCH_X86_64
dec heightd
movu m1, [srcq ] ;A
movu m3, [srcq + sstrideq ] ;B
lea srcq, [srcq + sstrideq * 2]
punpcklbw m0, m1, m3 ;A B
punpckhbw m1, m3 ;A B
movu m5, [srcq] ;C
punpcklbw m2, m3, m5 ;A B next iter
punpckhbw m3, m5 ;A B next iter
mova tmp0, m2 ;store to stack
mova tmp1, m3 ;store to stack
movu m7, [srcq + sstrideq] ;D
lea srcq, [srcq + sstrideq * 2]
punpcklbw m4, m5, m7 ;C D
punpckhbw m5, m7 ;C D
movu m9, [srcq] ;E
punpcklbw m6, m7, m9 ;C D next iter
punpckhbw m7, m9 ;C D next iter
movu m11, [srcq + sstrideq] ;F
lea srcq, [srcq + sstrideq * 2]
punpcklbw m8, m9, m11 ;E F
punpckhbw m9, m11 ;E F
movu m2, [srcq] ;G
punpcklbw m10, m11, m2 ;E F next iter
punpckhbw m11, m2 ;E F next iter
.loop:
;Do two rows at once
pmaddubsw m13, m0, k0k1
mova m0, m4
pmaddubsw m14, m8, k4k5
pmaddubsw m15, m4, k2k3
mova m4, m8
paddsw m13, m14
movu m3, [srcq + sstrideq] ;H
lea srcq, [srcq + sstrideq * 2]
punpcklbw m14, m2, m3 ;G H
mova m8, m14
pmaddubsw m14, k6k7
paddsw m15, m14
paddsw m13, m15
paddsw m13, krd
psraw m13, 7
pmaddubsw m14, m1, k0k1
pmaddubsw m1, m9, k4k5
pmaddubsw m15, m5, k2k3
paddsw m14, m1
mova m1, m5
mova m5, m9
punpckhbw m2, m3 ;G H
mova m9, m2
pmaddubsw m2, k6k7
paddsw m15, m2
paddsw m14, m15
paddsw m14, krd
psraw m14, 7
packuswb m13, m14
%ifidn %1, v8_avg
pavgb m13, [dstq]
%endif
mova [dstq], m13
; next iter
pmaddubsw m15, tmp0, k0k1
pmaddubsw m14, m10, k4k5
pmaddubsw m13, m6, k2k3
paddsw m15, m14
mova tmp0, m6
mova m6, m10
movu m2, [srcq] ;G next iter
punpcklbw m14, m3, m2 ;G H next iter
mova m10, m14
pmaddubsw m14, k6k7
paddsw m13, m14
paddsw m15, m13
paddsw m15, krd
psraw m15, 7
pmaddubsw m14, tmp1, k0k1
mova tmp1, m7
pmaddubsw m13, m7, k2k3
mova m7, m11
pmaddubsw m11, k4k5
paddsw m14, m11
punpckhbw m3, m2 ;G H next iter
mova m11, m3
pmaddubsw m3, k6k7
paddsw m13, m3
paddsw m14, m13
paddsw m14, krd
psraw m14, 7
packuswb m15, m14
%ifidn %1, v8_avg
pavgb m15, [dstq + dstrideq]
%endif
mova [dstq + dstrideq], m15
lea dstq, [dstq + dstrideq * 2]
sub heightd, 2
jg .loop
; Do last row if output_height is odd
jne .done
movu m3, [srcq + sstrideq] ;H
punpcklbw m6, m2, m3 ;G H
punpckhbw m2, m3 ;G H
pmaddubsw m0, k0k1
pmaddubsw m1, k0k1
pmaddubsw m4, k2k3
pmaddubsw m5, k2k3
pmaddubsw m8, k4k5
pmaddubsw m9, k4k5
pmaddubsw m6, k6k7
pmaddubsw m2, k6k7
paddsw m0, m8
paddsw m1, m9
paddsw m4, m6
paddsw m5, m2
paddsw m0, m4
paddsw m1, m5
paddsw m0, krd
paddsw m1, krd
psraw m0, 7
psraw m1, 7
packuswb m0, m1
%ifidn %1, v8_avg
pavgb m0, [dstq]
%endif
mova [dstq], m0
.done:
REP_RET
%endif ; ARCH_X86_64
%endm
INIT_XMM ssse3
SUBPIX_VFILTER16 v8
SUBPIX_VFILTER16 v8_avg
SUBPIX_VFILTER v8, 8
SUBPIX_VFILTER v8_avg, 8
SUBPIX_VFILTER v8, 4
SUBPIX_VFILTER v8_avg, 4