;
;  Copyright (c) 2010 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 "vpx_ports/x86_abi_support.asm"

%define BLOCK_HEIGHT_WIDTH 4
%define VP8_FILTER_WEIGHT 128
%define VP8_FILTER_SHIFT  7


;/************************************************************************************
; Notes: filter_block1d_h6 applies a 6 tap filter horizontally to the input pixels. The
; input pixel array has output_height rows. This routine assumes that output_height is an
; even number. This function handles 8 pixels in horizontal direction, calculating ONE
; rows each iteration to take advantage of the 128 bits operations.
;*************************************************************************************/
;void vp8_filter_block1d8_h6_sse2
;(
;    unsigned char  *src_ptr,
;    unsigned short *output_ptr,
;    unsigned int    src_pixels_per_line,
;    unsigned int    pixel_step,
;    unsigned int    output_height,
;    unsigned int    output_width,
;    short           *vp8_filter
;)
global sym(vp8_filter_block1d8_h6_sse2)
sym(vp8_filter_block1d8_h6_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 7
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

        mov         rdx,        arg(6) ;vp8_filter
        mov         rsi,        arg(0) ;src_ptr

        mov         rdi,        arg(1) ;output_ptr

        movsxd      rcx,        dword ptr arg(4) ;output_height
        movsxd      rax,        dword ptr arg(2) ;src_pixels_per_line            ; Pitch for Source
%if ABI_IS_32BIT=0
        movsxd      r8,         dword ptr arg(5) ;output_width
%endif
        pxor        xmm0,       xmm0                        ; clear xmm0 for unpack

filter_block1d8_h6_rowloop:
        movq        xmm3,       MMWORD PTR [rsi - 2]
        movq        xmm1,       MMWORD PTR [rsi + 6]

        prefetcht2  [rsi+rax-2]

        pslldq      xmm1,       8
        por         xmm1,       xmm3

        movdqa      xmm4,       xmm1
        movdqa      xmm5,       xmm1

        movdqa      xmm6,       xmm1
        movdqa      xmm7,       xmm1

        punpcklbw   xmm3,       xmm0                        ; xx05 xx04 xx03 xx02 xx01 xx01 xx-1 xx-2
        psrldq      xmm4,       1                           ; xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 -1

        pmullw      xmm3,       XMMWORD PTR [rdx]           ; x[-2] * H[-2]; Tap 1
        punpcklbw   xmm4,       xmm0                        ; xx06 xx05 xx04 xx03 xx02 xx01 xx00 xx-1

        psrldq      xmm5,       2                           ; xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00
        pmullw      xmm4,       XMMWORD PTR [rdx+16]        ; x[-1] * H[-1]; Tap 2


        punpcklbw   xmm5,       xmm0                        ; xx07 xx06 xx05 xx04 xx03 xx02 xx01 xx00
        psrldq      xmm6,       3                           ; xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01

        pmullw      xmm5,       [rdx+32]                    ; x[ 0] * H[ 0]; Tap 3

        punpcklbw   xmm6,       xmm0                        ; xx08 xx07 xx06 xx05 xx04 xx03 xx02 xx01
        psrldq      xmm7,       4                           ; xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02

        pmullw      xmm6,       [rdx+48]                    ; x[ 1] * h[ 1] ; Tap 4

        punpcklbw   xmm7,       xmm0                        ; xx09 xx08 xx07 xx06 xx05 xx04 xx03 xx02
        psrldq      xmm1,       5                           ; xx xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03


        pmullw      xmm7,       [rdx+64]                    ; x[ 2] * h[ 2] ; Tap 5

        punpcklbw   xmm1,       xmm0                        ; xx0a xx09 xx08 xx07 xx06 xx05 xx04 xx03
        pmullw      xmm1,       [rdx+80]                    ; x[ 3] * h[ 3] ; Tap 6


        paddsw      xmm4,       xmm7
        paddsw      xmm4,       xmm5

        paddsw      xmm4,       xmm3
        paddsw      xmm4,       xmm6

        paddsw      xmm4,       xmm1
        paddsw      xmm4,       [GLOBAL(rd)]

        psraw       xmm4,       7

        packuswb    xmm4,       xmm0
        punpcklbw   xmm4,       xmm0

        movdqa      XMMWORD Ptr [rdi],         xmm4
        lea         rsi,        [rsi + rax]

%if ABI_IS_32BIT
        add         rdi,        DWORD Ptr arg(5) ;[output_width]
%else
        add         rdi,        r8
%endif
        dec         rcx

        jnz         filter_block1d8_h6_rowloop                ; next row

    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret


;void vp8_filter_block1d16_h6_sse2
;(
;    unsigned char  *src_ptr,
;    unsigned short *output_ptr,
;    unsigned int    src_pixels_per_line,
;    unsigned int    pixel_step,
;    unsigned int    output_height,
;    unsigned int    output_width,
;    short           *vp8_filter
;)
;/************************************************************************************
; Notes: filter_block1d_h6 applies a 6 tap filter horizontally to the input pixels. The
; input pixel array has output_height rows. This routine assumes that output_height is an
; even number. This function handles 8 pixels in horizontal direction, calculating ONE
; rows each iteration to take advantage of the 128 bits operations.
;*************************************************************************************/
global sym(vp8_filter_block1d16_h6_sse2)
sym(vp8_filter_block1d16_h6_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 7
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

        mov         rdx,        arg(6) ;vp8_filter
        mov         rsi,        arg(0) ;src_ptr

        mov         rdi,        arg(1) ;output_ptr

        movsxd      rcx,        dword ptr arg(4) ;output_height
        movsxd      rax,        dword ptr arg(2) ;src_pixels_per_line            ; Pitch for Source
%if ABI_IS_32BIT=0
        movsxd      r8,         dword ptr arg(5) ;output_width
%endif

        pxor        xmm0,       xmm0                        ; clear xmm0 for unpack

filter_block1d16_h6_sse2_rowloop:
        movq        xmm3,       MMWORD PTR [rsi - 2]
        movq        xmm1,       MMWORD PTR [rsi + 6]

        movq        xmm2,       MMWORD PTR [rsi +14]
        pslldq      xmm2,       8

        por         xmm2,       xmm1
        prefetcht2  [rsi+rax-2]

        pslldq      xmm1,       8
        por         xmm1,       xmm3

        movdqa      xmm4,       xmm1
        movdqa      xmm5,       xmm1

        movdqa      xmm6,       xmm1
        movdqa      xmm7,       xmm1

        punpcklbw   xmm3,       xmm0                        ; xx05 xx04 xx03 xx02 xx01 xx01 xx-1 xx-2
        psrldq      xmm4,       1                           ; xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 -1

        pmullw      xmm3,       XMMWORD PTR [rdx]           ; x[-2] * H[-2]; Tap 1
        punpcklbw   xmm4,       xmm0                        ; xx06 xx05 xx04 xx03 xx02 xx01 xx00 xx-1

        psrldq      xmm5,       2                           ; xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00
        pmullw      xmm4,       XMMWORD PTR [rdx+16]        ; x[-1] * H[-1]; Tap 2


        punpcklbw   xmm5,       xmm0                        ; xx07 xx06 xx05 xx04 xx03 xx02 xx01 xx00
        psrldq      xmm6,       3                           ; xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01

        pmullw      xmm5,       [rdx+32]                    ; x[ 0] * H[ 0]; Tap 3

        punpcklbw   xmm6,       xmm0                        ; xx08 xx07 xx06 xx05 xx04 xx03 xx02 xx01
        psrldq      xmm7,       4                           ; xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02

        pmullw      xmm6,       [rdx+48]                    ; x[ 1] * h[ 1] ; Tap 4

        punpcklbw   xmm7,       xmm0                        ; xx09 xx08 xx07 xx06 xx05 xx04 xx03 xx02
        psrldq      xmm1,       5                           ; xx xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03


        pmullw      xmm7,       [rdx+64]                    ; x[ 2] * h[ 2] ; Tap 5

        punpcklbw   xmm1,       xmm0                        ; xx0a xx09 xx08 xx07 xx06 xx05 xx04 xx03
        pmullw      xmm1,       [rdx+80]                    ; x[ 3] * h[ 3] ; Tap 6

        paddsw      xmm4,       xmm7
        paddsw      xmm4,       xmm5

        paddsw      xmm4,       xmm3
        paddsw      xmm4,       xmm6

        paddsw      xmm4,       xmm1
        paddsw      xmm4,       [GLOBAL(rd)]

        psraw       xmm4,       7

        packuswb    xmm4,       xmm0
        punpcklbw   xmm4,       xmm0

        movdqa      XMMWORD Ptr [rdi],         xmm4

        movdqa      xmm3,       xmm2
        movdqa      xmm4,       xmm2

        movdqa      xmm5,       xmm2
        movdqa      xmm6,       xmm2

        movdqa      xmm7,       xmm2

        punpcklbw   xmm3,       xmm0                        ; xx05 xx04 xx03 xx02 xx01 xx01 xx-1 xx-2
        psrldq      xmm4,       1                           ; xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 -1

        pmullw      xmm3,       XMMWORD PTR [rdx]           ; x[-2] * H[-2]; Tap 1
        punpcklbw   xmm4,       xmm0                        ; xx06 xx05 xx04 xx03 xx02 xx01 xx00 xx-1

        psrldq      xmm5,       2                           ; xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00
        pmullw      xmm4,       XMMWORD PTR [rdx+16]        ; x[-1] * H[-1]; Tap 2


        punpcklbw   xmm5,       xmm0                        ; xx07 xx06 xx05 xx04 xx03 xx02 xx01 xx00
        psrldq      xmm6,       3                           ; xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01

        pmullw      xmm5,       [rdx+32]                    ; x[ 0] * H[ 0]; Tap 3

        punpcklbw   xmm6,       xmm0                        ; xx08 xx07 xx06 xx05 xx04 xx03 xx02 xx01
        psrldq      xmm7,       4                           ; xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02

        pmullw      xmm6,       [rdx+48]                    ; x[ 1] * h[ 1] ; Tap 4

        punpcklbw   xmm7,       xmm0                        ; xx09 xx08 xx07 xx06 xx05 xx04 xx03 xx02
        psrldq      xmm2,       5                           ; xx xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03

        pmullw      xmm7,       [rdx+64]                    ; x[ 2] * h[ 2] ; Tap 5

        punpcklbw   xmm2,       xmm0                        ; xx0a xx09 xx08 xx07 xx06 xx05 xx04 xx03
        pmullw      xmm2,       [rdx+80]                    ; x[ 3] * h[ 3] ; Tap 6


        paddsw      xmm4,       xmm7
        paddsw      xmm4,       xmm5

        paddsw      xmm4,       xmm3
        paddsw      xmm4,       xmm6

        paddsw      xmm4,       xmm2
        paddsw      xmm4,       [GLOBAL(rd)]

        psraw       xmm4,       7

        packuswb    xmm4,       xmm0
        punpcklbw   xmm4,       xmm0

        movdqa      XMMWORD Ptr [rdi+16],      xmm4

        lea         rsi,        [rsi + rax]
%if ABI_IS_32BIT
        add         rdi,        DWORD Ptr arg(5) ;[output_width]
%else
        add         rdi,        r8
%endif

        dec         rcx
        jnz         filter_block1d16_h6_sse2_rowloop                ; next row

    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret


;void vp8_filter_block1d8_v6_sse2
;(
;    short *src_ptr,
;    unsigned char *output_ptr,
;    int dst_ptich,
;    unsigned int pixels_per_line,
;    unsigned int pixel_step,
;    unsigned int output_height,
;    unsigned int output_width,
;    short * vp8_filter
;)
;/************************************************************************************
; Notes: filter_block1d8_v6 applies a 6 tap filter vertically to the input pixels. The
; input pixel array has output_height rows.
;*************************************************************************************/
global sym(vp8_filter_block1d8_v6_sse2)
sym(vp8_filter_block1d8_v6_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 8
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

        mov         rax,        arg(7) ;vp8_filter
        movsxd      rdx,        dword ptr arg(3) ;pixels_per_line

        mov         rdi,        arg(1) ;output_ptr
        mov         rsi,        arg(0) ;src_ptr

        sub         rsi,        rdx
        sub         rsi,        rdx

        movsxd      rcx,        DWORD PTR arg(5) ;[output_height]
        pxor        xmm0,       xmm0                        ; clear xmm0

        movdqa      xmm7,       XMMWORD PTR [GLOBAL(rd)]
%if ABI_IS_32BIT=0
        movsxd      r8,         dword ptr arg(2) ; dst_ptich
%endif

vp8_filter_block1d8_v6_sse2_loop:
        movdqa      xmm1,       XMMWORD PTR [rsi]
        pmullw      xmm1,       [rax]

        movdqa      xmm2,       XMMWORD PTR [rsi + rdx]
        pmullw      xmm2,       [rax + 16]

        movdqa      xmm3,       XMMWORD PTR [rsi + rdx * 2]
        pmullw      xmm3,       [rax + 32]

        movdqa      xmm5,       XMMWORD PTR [rsi + rdx * 4]
        pmullw      xmm5,       [rax + 64]

        add         rsi,        rdx
        movdqa      xmm4,       XMMWORD PTR [rsi + rdx * 2]

        pmullw      xmm4,       [rax + 48]
        movdqa      xmm6,       XMMWORD PTR [rsi + rdx * 4]

        pmullw      xmm6,       [rax + 80]

        paddsw      xmm2,       xmm5
        paddsw      xmm2,       xmm3

        paddsw      xmm2,       xmm1
        paddsw      xmm2,       xmm4

        paddsw      xmm2,       xmm6
        paddsw      xmm2,       xmm7

        psraw       xmm2,       7
        packuswb    xmm2,       xmm0              ; pack and saturate

        movq        QWORD PTR [rdi], xmm2         ; store the results in the destination
%if ABI_IS_32BIT
        add         rdi,        DWORD PTR arg(2) ;[dst_ptich]
%else
        add         rdi,        r8
%endif
        dec         rcx         ; decrement count
        jnz         vp8_filter_block1d8_v6_sse2_loop               ; next row

    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret


;void vp8_filter_block1d16_v6_sse2
;(
;    unsigned short *src_ptr,
;    unsigned char *output_ptr,
;    int dst_ptich,
;    unsigned int pixels_per_line,
;    unsigned int pixel_step,
;    unsigned int output_height,
;    unsigned int output_width,
;    const short    *vp8_filter
;)
;/************************************************************************************
; Notes: filter_block1d16_v6 applies a 6 tap filter vertically to the input pixels. The
; input pixel array has output_height rows.
;*************************************************************************************/
global sym(vp8_filter_block1d16_v6_sse2)
sym(vp8_filter_block1d16_v6_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 8
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

        mov         rax,        arg(7) ;vp8_filter
        movsxd      rdx,        dword ptr arg(3) ;pixels_per_line

        mov         rdi,        arg(1) ;output_ptr
        mov         rsi,        arg(0) ;src_ptr

        sub         rsi,        rdx
        sub         rsi,        rdx

        movsxd      rcx,        DWORD PTR arg(5) ;[output_height]
%if ABI_IS_32BIT=0
        movsxd      r8,         dword ptr arg(2) ; dst_ptich
%endif

vp8_filter_block1d16_v6_sse2_loop:
; The order for adding 6-tap is 2 5 3 1 4 6. Read in data in that order.
        movdqa      xmm1,       XMMWORD PTR [rsi + rdx]       ; line 2
        movdqa      xmm2,       XMMWORD PTR [rsi + rdx + 16]
        pmullw      xmm1,       [rax + 16]
        pmullw      xmm2,       [rax + 16]

        movdqa      xmm3,       XMMWORD PTR [rsi + rdx * 4]       ; line 5
        movdqa      xmm4,       XMMWORD PTR [rsi + rdx * 4 + 16]
        pmullw      xmm3,       [rax + 64]
        pmullw      xmm4,       [rax + 64]

        movdqa      xmm5,       XMMWORD PTR [rsi + rdx * 2]       ; line 3
        movdqa      xmm6,       XMMWORD PTR [rsi + rdx * 2 + 16]
        pmullw      xmm5,       [rax + 32]
        pmullw      xmm6,       [rax + 32]

        movdqa      xmm7,       XMMWORD PTR [rsi]       ; line 1
        movdqa      xmm0,       XMMWORD PTR [rsi + 16]
        pmullw      xmm7,       [rax]
        pmullw      xmm0,       [rax]

        paddsw      xmm1,       xmm3
        paddsw      xmm2,       xmm4
        paddsw      xmm1,       xmm5
        paddsw      xmm2,       xmm6
        paddsw      xmm1,       xmm7
        paddsw      xmm2,       xmm0

        add         rsi,        rdx

        movdqa      xmm3,       XMMWORD PTR [rsi + rdx * 2]       ; line 4
        movdqa      xmm4,       XMMWORD PTR [rsi + rdx * 2 + 16]
        pmullw      xmm3,       [rax + 48]
        pmullw      xmm4,       [rax + 48]

        movdqa      xmm5,       XMMWORD PTR [rsi + rdx * 4]       ; line 6
        movdqa      xmm6,       XMMWORD PTR [rsi + rdx * 4 + 16]
        pmullw      xmm5,       [rax + 80]
        pmullw      xmm6,       [rax + 80]

        movdqa      xmm7,       XMMWORD PTR [GLOBAL(rd)]
        pxor        xmm0,       xmm0                        ; clear xmm0

        paddsw      xmm1,       xmm3
        paddsw      xmm2,       xmm4
        paddsw      xmm1,       xmm5
        paddsw      xmm2,       xmm6

        paddsw      xmm1,       xmm7
        paddsw      xmm2,       xmm7

        psraw       xmm1,       7
        psraw       xmm2,       7

        packuswb    xmm1,       xmm2              ; pack and saturate
        movdqa      XMMWORD PTR [rdi], xmm1       ; store the results in the destination
%if ABI_IS_32BIT
        add         rdi,        DWORD PTR arg(2) ;[dst_ptich]
%else
        add         rdi,        r8
%endif
        dec         rcx         ; decrement count
        jnz         vp8_filter_block1d16_v6_sse2_loop               ; next row

    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret


;void vp8_filter_block1d8_h6_only_sse2
;(
;    unsigned char  *src_ptr,
;    unsigned int    src_pixels_per_line,
;    unsigned char  *output_ptr,
;    int dst_ptich,
;    unsigned int    output_height,
;    const short    *vp8_filter
;)
; First-pass filter only when yoffset==0
global sym(vp8_filter_block1d8_h6_only_sse2)
sym(vp8_filter_block1d8_h6_only_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 6
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

        mov         rdx,        arg(5) ;vp8_filter
        mov         rsi,        arg(0) ;src_ptr

        mov         rdi,        arg(2) ;output_ptr

        movsxd      rcx,        dword ptr arg(4) ;output_height
        movsxd      rax,        dword ptr arg(1) ;src_pixels_per_line            ; Pitch for Source
%if ABI_IS_32BIT=0
        movsxd      r8,         dword ptr arg(3) ;dst_ptich
%endif
        pxor        xmm0,       xmm0                        ; clear xmm0 for unpack

filter_block1d8_h6_only_rowloop:
        movq        xmm3,       MMWORD PTR [rsi - 2]
        movq        xmm1,       MMWORD PTR [rsi + 6]

        prefetcht2  [rsi+rax-2]

        pslldq      xmm1,       8
        por         xmm1,       xmm3

        movdqa      xmm4,       xmm1
        movdqa      xmm5,       xmm1

        movdqa      xmm6,       xmm1
        movdqa      xmm7,       xmm1

        punpcklbw   xmm3,       xmm0                        ; xx05 xx04 xx03 xx02 xx01 xx01 xx-1 xx-2
        psrldq      xmm4,       1                           ; xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 -1

        pmullw      xmm3,       XMMWORD PTR [rdx]           ; x[-2] * H[-2]; Tap 1
        punpcklbw   xmm4,       xmm0                        ; xx06 xx05 xx04 xx03 xx02 xx01 xx00 xx-1

        psrldq      xmm5,       2                           ; xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00
        pmullw      xmm4,       XMMWORD PTR [rdx+16]        ; x[-1] * H[-1]; Tap 2


        punpcklbw   xmm5,       xmm0                        ; xx07 xx06 xx05 xx04 xx03 xx02 xx01 xx00
        psrldq      xmm6,       3                           ; xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01

        pmullw      xmm5,       [rdx+32]                    ; x[ 0] * H[ 0]; Tap 3

        punpcklbw   xmm6,       xmm0                        ; xx08 xx07 xx06 xx05 xx04 xx03 xx02 xx01
        psrldq      xmm7,       4                           ; xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02

        pmullw      xmm6,       [rdx+48]                    ; x[ 1] * h[ 1] ; Tap 4

        punpcklbw   xmm7,       xmm0                        ; xx09 xx08 xx07 xx06 xx05 xx04 xx03 xx02
        psrldq      xmm1,       5                           ; xx xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03


        pmullw      xmm7,       [rdx+64]                    ; x[ 2] * h[ 2] ; Tap 5

        punpcklbw   xmm1,       xmm0                        ; xx0a xx09 xx08 xx07 xx06 xx05 xx04 xx03
        pmullw      xmm1,       [rdx+80]                    ; x[ 3] * h[ 3] ; Tap 6


        paddsw      xmm4,       xmm7
        paddsw      xmm4,       xmm5

        paddsw      xmm4,       xmm3
        paddsw      xmm4,       xmm6

        paddsw      xmm4,       xmm1
        paddsw      xmm4,       [GLOBAL(rd)]

        psraw       xmm4,       7

        packuswb    xmm4,       xmm0

        movq        QWORD PTR [rdi],   xmm4       ; store the results in the destination
        lea         rsi,        [rsi + rax]

%if ABI_IS_32BIT
        add         rdi,        DWORD Ptr arg(3) ;dst_ptich
%else
        add         rdi,        r8
%endif
        dec         rcx

        jnz         filter_block1d8_h6_only_rowloop                ; next row

    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret


;void vp8_filter_block1d16_h6_only_sse2
;(
;    unsigned char  *src_ptr,
;    unsigned int    src_pixels_per_line,
;    unsigned char  *output_ptr,
;    int dst_ptich,
;    unsigned int    output_height,
;    const short    *vp8_filter
;)
; First-pass filter only when yoffset==0
global sym(vp8_filter_block1d16_h6_only_sse2)
sym(vp8_filter_block1d16_h6_only_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 6
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

        mov         rdx,        arg(5) ;vp8_filter
        mov         rsi,        arg(0) ;src_ptr

        mov         rdi,        arg(2) ;output_ptr

        movsxd      rcx,        dword ptr arg(4) ;output_height
        movsxd      rax,        dword ptr arg(1) ;src_pixels_per_line            ; Pitch for Source
%if ABI_IS_32BIT=0
        movsxd      r8,         dword ptr arg(3) ;dst_ptich
%endif

        pxor        xmm0,       xmm0                        ; clear xmm0 for unpack

filter_block1d16_h6_only_sse2_rowloop:
        movq        xmm3,       MMWORD PTR [rsi - 2]
        movq        xmm1,       MMWORD PTR [rsi + 6]

        movq        xmm2,       MMWORD PTR [rsi +14]
        pslldq      xmm2,       8

        por         xmm2,       xmm1
        prefetcht2  [rsi+rax-2]

        pslldq      xmm1,       8
        por         xmm1,       xmm3

        movdqa      xmm4,       xmm1
        movdqa      xmm5,       xmm1

        movdqa      xmm6,       xmm1
        movdqa      xmm7,       xmm1

        punpcklbw   xmm3,       xmm0                        ; xx05 xx04 xx03 xx02 xx01 xx01 xx-1 xx-2
        psrldq      xmm4,       1                           ; xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 -1

        pmullw      xmm3,       XMMWORD PTR [rdx]           ; x[-2] * H[-2]; Tap 1
        punpcklbw   xmm4,       xmm0                        ; xx06 xx05 xx04 xx03 xx02 xx01 xx00 xx-1

        psrldq      xmm5,       2                           ; xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00
        pmullw      xmm4,       XMMWORD PTR [rdx+16]        ; x[-1] * H[-1]; Tap 2

        punpcklbw   xmm5,       xmm0                        ; xx07 xx06 xx05 xx04 xx03 xx02 xx01 xx00
        psrldq      xmm6,       3                           ; xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01

        pmullw      xmm5,       [rdx+32]                    ; x[ 0] * H[ 0]; Tap 3

        punpcklbw   xmm6,       xmm0                        ; xx08 xx07 xx06 xx05 xx04 xx03 xx02 xx01
        psrldq      xmm7,       4                           ; xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02

        pmullw      xmm6,       [rdx+48]                    ; x[ 1] * h[ 1] ; Tap 4

        punpcklbw   xmm7,       xmm0                        ; xx09 xx08 xx07 xx06 xx05 xx04 xx03 xx02
        psrldq      xmm1,       5                           ; xx xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03

        pmullw      xmm7,       [rdx+64]                    ; x[ 2] * h[ 2] ; Tap 5

        punpcklbw   xmm1,       xmm0                        ; xx0a xx09 xx08 xx07 xx06 xx05 xx04 xx03
        pmullw      xmm1,       [rdx+80]                    ; x[ 3] * h[ 3] ; Tap 6

        paddsw      xmm4,       xmm7
        paddsw      xmm4,       xmm5

        paddsw      xmm4,       xmm3
        paddsw      xmm4,       xmm6

        paddsw      xmm4,       xmm1
        paddsw      xmm4,       [GLOBAL(rd)]

        psraw       xmm4,       7

        packuswb    xmm4,       xmm0                        ; lower 8 bytes

        movq        QWORD Ptr [rdi],         xmm4           ; store the results in the destination

        movdqa      xmm3,       xmm2
        movdqa      xmm4,       xmm2

        movdqa      xmm5,       xmm2
        movdqa      xmm6,       xmm2

        movdqa      xmm7,       xmm2

        punpcklbw   xmm3,       xmm0                        ; xx05 xx04 xx03 xx02 xx01 xx01 xx-1 xx-2
        psrldq      xmm4,       1                           ; xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 -1

        pmullw      xmm3,       XMMWORD PTR [rdx]           ; x[-2] * H[-2]; Tap 1
        punpcklbw   xmm4,       xmm0                        ; xx06 xx05 xx04 xx03 xx02 xx01 xx00 xx-1

        psrldq      xmm5,       2                           ; xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00
        pmullw      xmm4,       XMMWORD PTR [rdx+16]        ; x[-1] * H[-1]; Tap 2

        punpcklbw   xmm5,       xmm0                        ; xx07 xx06 xx05 xx04 xx03 xx02 xx01 xx00
        psrldq      xmm6,       3                           ; xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01

        pmullw      xmm5,       [rdx+32]                    ; x[ 0] * H[ 0]; Tap 3

        punpcklbw   xmm6,       xmm0                        ; xx08 xx07 xx06 xx05 xx04 xx03 xx02 xx01
        psrldq      xmm7,       4                           ; xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03 02

        pmullw      xmm6,       [rdx+48]                    ; x[ 1] * h[ 1] ; Tap 4

        punpcklbw   xmm7,       xmm0                        ; xx09 xx08 xx07 xx06 xx05 xx04 xx03 xx02
        psrldq      xmm2,       5                           ; xx xx xx xx xx 0d 0c 0b 0a 09 08 07 06 05 04 03

        pmullw      xmm7,       [rdx+64]                    ; x[ 2] * h[ 2] ; Tap 5

        punpcklbw   xmm2,       xmm0                        ; xx0a xx09 xx08 xx07 xx06 xx05 xx04 xx03
        pmullw      xmm2,       [rdx+80]                    ; x[ 3] * h[ 3] ; Tap 6

        paddsw      xmm4,       xmm7
        paddsw      xmm4,       xmm5

        paddsw      xmm4,       xmm3
        paddsw      xmm4,       xmm6

        paddsw      xmm4,       xmm2
        paddsw      xmm4,       [GLOBAL(rd)]

        psraw       xmm4,       7

        packuswb    xmm4,       xmm0                        ; higher 8 bytes

        movq        QWORD Ptr [rdi+8],      xmm4            ; store the results in the destination

        lea         rsi,        [rsi + rax]
%if ABI_IS_32BIT
        add         rdi,        DWORD Ptr arg(3) ;dst_ptich
%else
        add         rdi,        r8
%endif

        dec         rcx
        jnz         filter_block1d16_h6_only_sse2_rowloop                ; next row

    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret


;void vp8_filter_block1d8_v6_only_sse2
;(
;    unsigned char *src_ptr,
;    unsigned int    src_pixels_per_line,
;    unsigned char *output_ptr,
;    int dst_ptich,
;    unsigned int output_height,
;    const short    *vp8_filter
;)
; Second-pass filter only when xoffset==0
global sym(vp8_filter_block1d8_v6_only_sse2)
sym(vp8_filter_block1d8_v6_only_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 6
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

        mov         rsi,        arg(0) ;src_ptr
        mov         rdi,        arg(2) ;output_ptr

        movsxd      rcx,        dword ptr arg(4) ;output_height
        movsxd      rdx,        dword ptr arg(1) ;src_pixels_per_line

        mov         rax,        arg(5) ;vp8_filter

        pxor        xmm0,       xmm0                        ; clear xmm0

        movdqa      xmm7,       XMMWORD PTR [GLOBAL(rd)]
%if ABI_IS_32BIT=0
        movsxd      r8,         dword ptr arg(3) ; dst_ptich
%endif

vp8_filter_block1d8_v6_only_sse2_loop:
        movq        xmm1,       MMWORD PTR [rsi]
        movq        xmm2,       MMWORD PTR [rsi + rdx]
        movq        xmm3,       MMWORD PTR [rsi + rdx * 2]
        movq        xmm5,       MMWORD PTR [rsi + rdx * 4]
        add         rsi,        rdx
        movq        xmm4,       MMWORD PTR [rsi + rdx * 2]
        movq        xmm6,       MMWORD PTR [rsi + rdx * 4]

        punpcklbw   xmm1,       xmm0
        pmullw      xmm1,       [rax]

        punpcklbw   xmm2,       xmm0
        pmullw      xmm2,       [rax + 16]

        punpcklbw   xmm3,       xmm0
        pmullw      xmm3,       [rax + 32]

        punpcklbw   xmm5,       xmm0
        pmullw      xmm5,       [rax + 64]

        punpcklbw   xmm4,       xmm0
        pmullw      xmm4,       [rax + 48]

        punpcklbw   xmm6,       xmm0
        pmullw      xmm6,       [rax + 80]

        paddsw      xmm2,       xmm5
        paddsw      xmm2,       xmm3

        paddsw      xmm2,       xmm1
        paddsw      xmm2,       xmm4

        paddsw      xmm2,       xmm6
        paddsw      xmm2,       xmm7

        psraw       xmm2,       7
        packuswb    xmm2,       xmm0              ; pack and saturate

        movq        QWORD PTR [rdi], xmm2         ; store the results in the destination
%if ABI_IS_32BIT
        add         rdi,        DWORD PTR arg(3) ;[dst_ptich]
%else
        add         rdi,        r8
%endif
        dec         rcx         ; decrement count
        jnz         vp8_filter_block1d8_v6_only_sse2_loop               ; next row

    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret


;void vp8_unpack_block1d16_h6_sse2
;(
;    unsigned char  *src_ptr,
;    unsigned short *output_ptr,
;    unsigned int    src_pixels_per_line,
;    unsigned int    output_height,
;    unsigned int    output_width
;)
global sym(vp8_unpack_block1d16_h6_sse2)
sym(vp8_unpack_block1d16_h6_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 5
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

        mov         rsi,        arg(0) ;src_ptr
        mov         rdi,        arg(1) ;output_ptr

        movsxd      rcx,        dword ptr arg(3) ;output_height
        movsxd      rax,        dword ptr arg(2) ;src_pixels_per_line            ; Pitch for Source

        pxor        xmm0,       xmm0                        ; clear xmm0 for unpack
%if ABI_IS_32BIT=0
        movsxd      r8,         dword ptr arg(4) ;output_width            ; Pitch for Source
%endif

unpack_block1d16_h6_sse2_rowloop:
        movq        xmm1,       MMWORD PTR [rsi]            ; 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 -1 -2
        movq        xmm3,       MMWORD PTR [rsi+8]          ; make copy of xmm1

        punpcklbw   xmm3,       xmm0                        ; xx05 xx04 xx03 xx02 xx01 xx01 xx-1 xx-2
        punpcklbw   xmm1,       xmm0

        movdqa      XMMWORD Ptr [rdi],         xmm1
        movdqa      XMMWORD Ptr [rdi + 16],    xmm3

        lea         rsi,        [rsi + rax]
%if ABI_IS_32BIT
        add         rdi,        DWORD Ptr arg(4) ;[output_width]
%else
        add         rdi,        r8
%endif
        dec         rcx
        jnz         unpack_block1d16_h6_sse2_rowloop                ; next row

    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    UNSHADOW_ARGS
    pop         rbp
    ret


;void vp8_bilinear_predict16x16_sse2
;(
;    unsigned char  *src_ptr,
;    int   src_pixels_per_line,
;    int  xoffset,
;    int  yoffset,
;    unsigned char *dst_ptr,
;    int dst_pitch
;)
extern sym(vp8_bilinear_filters_mmx)
global sym(vp8_bilinear_predict16x16_sse2)
sym(vp8_bilinear_predict16x16_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 6
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

    ;const short *HFilter = bilinear_filters_mmx[xoffset]
    ;const short *VFilter = bilinear_filters_mmx[yoffset]

        lea         rcx,        [GLOBAL(sym(vp8_bilinear_filters_mmx))]
        movsxd      rax,        dword ptr arg(2) ;xoffset

        cmp         rax,        0      ;skip first_pass filter if xoffset=0
        je          b16x16_sp_only

        shl         rax,        5
        add         rax,        rcx    ;HFilter

        mov         rdi,        arg(4) ;dst_ptr
        mov         rsi,        arg(0) ;src_ptr
        movsxd      rdx,        dword ptr arg(5) ;dst_pitch

        movdqa      xmm1,       [rax]
        movdqa      xmm2,       [rax+16]

        movsxd      rax,        dword ptr arg(3) ;yoffset

        cmp         rax,        0      ;skip second_pass filter if yoffset=0
        je          b16x16_fp_only

        shl         rax,        5
        add         rax,        rcx    ;VFilter

        lea         rcx,        [rdi+rdx*8]
        lea         rcx,        [rcx+rdx*8]
        movsxd      rdx,        dword ptr arg(1) ;src_pixels_per_line

        pxor        xmm0,       xmm0

%if ABI_IS_32BIT=0
        movsxd      r8,         dword ptr arg(5) ;dst_pitch
%endif
        ; get the first horizontal line done
        movdqu      xmm3,       [rsi]               ; xx 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14
        movdqa      xmm4,       xmm3                 ; make a copy of current line

        punpcklbw   xmm3,       xmm0                 ; xx 00 01 02 03 04 05 06
        punpckhbw   xmm4,       xmm0

        pmullw      xmm3,       xmm1
        pmullw      xmm4,       xmm1

        movdqu      xmm5,       [rsi+1]
        movdqa      xmm6,       xmm5

        punpcklbw   xmm5,       xmm0
        punpckhbw   xmm6,       xmm0

        pmullw      xmm5,       xmm2
        pmullw      xmm6,       xmm2

        paddw       xmm3,       xmm5
        paddw       xmm4,       xmm6

        paddw       xmm3,       [GLOBAL(rd)]        ; xmm3 += round value
        psraw       xmm3,       VP8_FILTER_SHIFT        ; xmm3 /= 128

        paddw       xmm4,       [GLOBAL(rd)]
        psraw       xmm4,       VP8_FILTER_SHIFT

        movdqa      xmm7,       xmm3
        packuswb    xmm7,       xmm4

        add         rsi,        rdx                 ; next line
next_row:
        movdqu      xmm3,       [rsi]               ; xx 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14
        movdqa      xmm4,       xmm3                 ; make a copy of current line

        punpcklbw   xmm3,       xmm0                 ; xx 00 01 02 03 04 05 06
        punpckhbw   xmm4,       xmm0

        pmullw      xmm3,       xmm1
        pmullw      xmm4,       xmm1

        movdqu      xmm5,       [rsi+1]
        movdqa      xmm6,       xmm5

        punpcklbw   xmm5,       xmm0
        punpckhbw   xmm6,       xmm0

        pmullw      xmm5,       xmm2
        pmullw      xmm6,       xmm2

        paddw       xmm3,       xmm5
        paddw       xmm4,       xmm6

        movdqa      xmm5,       xmm7
        movdqa      xmm6,       xmm7

        punpcklbw   xmm5,       xmm0
        punpckhbw   xmm6,       xmm0

        pmullw      xmm5,       [rax]
        pmullw      xmm6,       [rax]

        paddw       xmm3,       [GLOBAL(rd)]        ; xmm3 += round value
        psraw       xmm3,       VP8_FILTER_SHIFT        ; xmm3 /= 128

        paddw       xmm4,       [GLOBAL(rd)]
        psraw       xmm4,       VP8_FILTER_SHIFT

        movdqa      xmm7,       xmm3
        packuswb    xmm7,       xmm4

        pmullw      xmm3,       [rax+16]
        pmullw      xmm4,       [rax+16]

        paddw       xmm3,       xmm5
        paddw       xmm4,       xmm6

        paddw       xmm3,       [GLOBAL(rd)]        ; xmm3 += round value
        psraw       xmm3,       VP8_FILTER_SHIFT        ; xmm3 /= 128

        paddw       xmm4,       [GLOBAL(rd)]
        psraw       xmm4,       VP8_FILTER_SHIFT

        packuswb    xmm3,       xmm4
        movdqa      [rdi],      xmm3                 ; store the results in the destination

        add         rsi,        rdx                 ; next line
%if ABI_IS_32BIT
        add         rdi,        DWORD PTR arg(5) ;dst_pitch
%else
        add         rdi,        r8
%endif

        cmp         rdi,        rcx
        jne         next_row

        jmp         done

b16x16_sp_only:
        movsxd      rax,        dword ptr arg(3) ;yoffset
        shl         rax,        5
        add         rax,        rcx    ;VFilter

        mov         rdi,        arg(4) ;dst_ptr
        mov         rsi,        arg(0) ;src_ptr
        movsxd      rdx,        dword ptr arg(5) ;dst_pitch

        movdqa      xmm1,       [rax]
        movdqa      xmm2,       [rax+16]

        lea         rcx,        [rdi+rdx*8]
        lea         rcx,        [rcx+rdx*8]
        movsxd      rax,        dword ptr arg(1) ;src_pixels_per_line

        pxor        xmm0,       xmm0

        ; get the first horizontal line done
        movdqu      xmm7,       [rsi]               ; xx 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14

        add         rsi,        rax                 ; next line
next_row_spo:
        movdqu      xmm3,       [rsi]               ; xx 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14

        movdqa      xmm5,       xmm7
        movdqa      xmm6,       xmm7

        movdqa      xmm4,       xmm3                 ; make a copy of current line
        movdqa      xmm7,       xmm3

        punpcklbw   xmm5,       xmm0
        punpckhbw   xmm6,       xmm0
        punpcklbw   xmm3,       xmm0                 ; xx 00 01 02 03 04 05 06
        punpckhbw   xmm4,       xmm0

        pmullw      xmm5,       xmm1
        pmullw      xmm6,       xmm1
        pmullw      xmm3,       xmm2
        pmullw      xmm4,       xmm2

        paddw       xmm3,       xmm5
        paddw       xmm4,       xmm6

        paddw       xmm3,       [GLOBAL(rd)]        ; xmm3 += round value
        psraw       xmm3,       VP8_FILTER_SHIFT        ; xmm3 /= 128

        paddw       xmm4,       [GLOBAL(rd)]
        psraw       xmm4,       VP8_FILTER_SHIFT

        packuswb    xmm3,       xmm4
        movdqa      [rdi],      xmm3                 ; store the results in the destination

        add         rsi,        rax                 ; next line
        add         rdi,        rdx                 ;dst_pitch
        cmp         rdi,        rcx
        jne         next_row_spo

        jmp         done

b16x16_fp_only:
        lea         rcx,        [rdi+rdx*8]
        lea         rcx,        [rcx+rdx*8]
        movsxd      rax,        dword ptr arg(1) ;src_pixels_per_line
        pxor        xmm0,       xmm0

next_row_fpo:
        movdqu      xmm3,       [rsi]               ; xx 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14
        movdqa      xmm4,       xmm3                 ; make a copy of current line

        punpcklbw   xmm3,       xmm0                 ; xx 00 01 02 03 04 05 06
        punpckhbw   xmm4,       xmm0

        pmullw      xmm3,       xmm1
        pmullw      xmm4,       xmm1

        movdqu      xmm5,       [rsi+1]
        movdqa      xmm6,       xmm5

        punpcklbw   xmm5,       xmm0
        punpckhbw   xmm6,       xmm0

        pmullw      xmm5,       xmm2
        pmullw      xmm6,       xmm2

        paddw       xmm3,       xmm5
        paddw       xmm4,       xmm6

        paddw       xmm3,       [GLOBAL(rd)]        ; xmm3 += round value
        psraw       xmm3,       VP8_FILTER_SHIFT        ; xmm3 /= 128

        paddw       xmm4,       [GLOBAL(rd)]
        psraw       xmm4,       VP8_FILTER_SHIFT

        packuswb    xmm3,       xmm4
        movdqa      [rdi],      xmm3                 ; store the results in the destination

        add         rsi,        rax                 ; next line
        add         rdi,        rdx                 ; dst_pitch
        cmp         rdi,        rcx
        jne         next_row_fpo

done:
    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret


;void vp8_bilinear_predict8x8_sse2
;(
;    unsigned char  *src_ptr,
;    int   src_pixels_per_line,
;    int  xoffset,
;    int  yoffset,
;    unsigned char *dst_ptr,
;    int dst_pitch
;)
extern sym(vp8_bilinear_filters_mmx)
global sym(vp8_bilinear_predict8x8_sse2)
sym(vp8_bilinear_predict8x8_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 6
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

    ALIGN_STACK 16, rax
    sub         rsp, 144                         ; reserve 144 bytes

    ;const short *HFilter = bilinear_filters_mmx[xoffset]
    ;const short *VFilter = bilinear_filters_mmx[yoffset]
        lea         rcx,        [GLOBAL(sym(vp8_bilinear_filters_mmx))]

        mov         rsi,        arg(0) ;src_ptr
        movsxd      rdx,        dword ptr arg(1) ;src_pixels_per_line

    ;Read 9-line unaligned data in and put them on stack. This gives a big
    ;performance boost.
        movdqu      xmm0,       [rsi]
        lea         rax,        [rdx + rdx*2]
        movdqu      xmm1,       [rsi+rdx]
        movdqu      xmm2,       [rsi+rdx*2]
        add         rsi,        rax
        movdqu      xmm3,       [rsi]
        movdqu      xmm4,       [rsi+rdx]
        movdqu      xmm5,       [rsi+rdx*2]
        add         rsi,        rax
        movdqu      xmm6,       [rsi]
        movdqu      xmm7,       [rsi+rdx]

        movdqa      XMMWORD PTR [rsp],            xmm0

        movdqu      xmm0,       [rsi+rdx*2]

        movdqa      XMMWORD PTR [rsp+16],         xmm1
        movdqa      XMMWORD PTR [rsp+32],         xmm2
        movdqa      XMMWORD PTR [rsp+48],         xmm3
        movdqa      XMMWORD PTR [rsp+64],         xmm4
        movdqa      XMMWORD PTR [rsp+80],         xmm5
        movdqa      XMMWORD PTR [rsp+96],         xmm6
        movdqa      XMMWORD PTR [rsp+112],        xmm7
        movdqa      XMMWORD PTR [rsp+128],        xmm0

        movsxd      rax,        dword ptr arg(2) ;xoffset
        shl         rax,        5
        add         rax,        rcx    ;HFilter

        mov         rdi,        arg(4) ;dst_ptr
        movsxd      rdx,        dword ptr arg(5) ;dst_pitch

        movdqa      xmm1,       [rax]
        movdqa      xmm2,       [rax+16]

        movsxd      rax,        dword ptr arg(3) ;yoffset
        shl         rax,        5
        add         rax,        rcx    ;VFilter

        lea         rcx,        [rdi+rdx*8]

        movdqa      xmm5,       [rax]
        movdqa      xmm6,       [rax+16]

        pxor        xmm0,       xmm0

        ; get the first horizontal line done
        movdqa      xmm3,       XMMWORD PTR [rsp]
        movdqa      xmm4,       xmm3                 ; make a copy of current line
        psrldq      xmm4,       1

        punpcklbw   xmm3,       xmm0                 ; 00 01 02 03 04 05 06 07
        punpcklbw   xmm4,       xmm0                 ; 01 02 03 04 05 06 07 08

        pmullw      xmm3,       xmm1
        pmullw      xmm4,       xmm2

        paddw       xmm3,       xmm4

        paddw       xmm3,       [GLOBAL(rd)]        ; xmm3 += round value
        psraw       xmm3,       VP8_FILTER_SHIFT        ; xmm3 /= 128

        movdqa      xmm7,       xmm3
        add         rsp,        16                 ; next line
next_row8x8:
        movdqa      xmm3,       XMMWORD PTR [rsp]               ; 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
        movdqa      xmm4,       xmm3                 ; make a copy of current line
        psrldq      xmm4,       1

        punpcklbw   xmm3,       xmm0                 ; 00 01 02 03 04 05 06 07
        punpcklbw   xmm4,       xmm0                 ; 01 02 03 04 05 06 07 08

        pmullw      xmm3,       xmm1
        pmullw      xmm4,       xmm2

        paddw       xmm3,       xmm4
        pmullw      xmm7,       xmm5

        paddw       xmm3,       [GLOBAL(rd)]        ; xmm3 += round value
        psraw       xmm3,       VP8_FILTER_SHIFT        ; xmm3 /= 128

        movdqa      xmm4,       xmm3

        pmullw      xmm3,       xmm6
        paddw       xmm3,       xmm7

        movdqa      xmm7,       xmm4

        paddw       xmm3,       [GLOBAL(rd)]        ; xmm3 += round value
        psraw       xmm3,       VP8_FILTER_SHIFT        ; xmm3 /= 128

        packuswb    xmm3,       xmm0
        movq        [rdi],      xmm3                 ; store the results in the destination

        add         rsp,        16                 ; next line
        add         rdi,        rdx

        cmp         rdi,        rcx
        jne         next_row8x8

    ;add rsp, 144
    pop rsp
    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret


SECTION_RODATA
align 16
rd:
    times 8 dw 0x40