;
;  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"

;macro in deblock functions
%macro FIRST_2_ROWS 0
        movdqa      xmm4,       xmm0
        movdqa      xmm6,       xmm0
        movdqa      xmm5,       xmm1
        pavgb       xmm5,       xmm3

        ;calculate absolute value
        psubusb     xmm4,       xmm1
        psubusb     xmm1,       xmm0
        psubusb     xmm6,       xmm3
        psubusb     xmm3,       xmm0
        paddusb     xmm4,       xmm1
        paddusb     xmm6,       xmm3

        ;get threshold
        movdqa      xmm2,       flimit
        pxor        xmm1,       xmm1
        movdqa      xmm7,       xmm2

        ;get mask
        psubusb     xmm2,       xmm4
        psubusb     xmm7,       xmm6
        pcmpeqb     xmm2,       xmm1
        pcmpeqb     xmm7,       xmm1
        por         xmm7,       xmm2
%endmacro

%macro SECOND_2_ROWS 0
        movdqa      xmm6,       xmm0
        movdqa      xmm4,       xmm0
        movdqa      xmm2,       xmm1
        pavgb       xmm1,       xmm3

        ;calculate absolute value
        psubusb     xmm6,       xmm2
        psubusb     xmm2,       xmm0
        psubusb     xmm4,       xmm3
        psubusb     xmm3,       xmm0
        paddusb     xmm6,       xmm2
        paddusb     xmm4,       xmm3

        pavgb       xmm5,       xmm1

        ;get threshold
        movdqa      xmm2,       flimit
        pxor        xmm1,       xmm1
        movdqa      xmm3,       xmm2

        ;get mask
        psubusb     xmm2,       xmm6
        psubusb     xmm3,       xmm4
        pcmpeqb     xmm2,       xmm1
        pcmpeqb     xmm3,       xmm1

        por         xmm7,       xmm2
        por         xmm7,       xmm3

        pavgb       xmm5,       xmm0

        ;decide if or not to use filtered value
        pand        xmm0,       xmm7
        pandn       xmm7,       xmm5
        paddusb     xmm0,       xmm7
%endmacro

%macro UPDATE_FLIMIT 0
        movdqu      xmm2,       XMMWORD PTR [rbx]
        movdqu      [rsp],      xmm2
        add         rbx,        16
%endmacro

SECTION .text

;void vpx_post_proc_down_and_across_mb_row_sse2
;(
;    unsigned char *src_ptr,
;    unsigned char *dst_ptr,
;    int src_pixels_per_line,
;    int dst_pixels_per_line,
;    int cols,
;    int *flimits,
;    int size
;)
global sym(vpx_post_proc_down_and_across_mb_row_sse2) PRIVATE
sym(vpx_post_proc_down_and_across_mb_row_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 7
    SAVE_XMM 7
    push        rbx
    push        rsi
    push        rdi
    ; end prolog
    ALIGN_STACK 16, rax
    sub         rsp, 16

        ; put flimit on stack
        mov         rbx,        arg(5)           ;flimits ptr
        UPDATE_FLIMIT

%define flimit [rsp]

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

        movsxd      rax,        DWORD PTR arg(2) ;src_pixels_per_line
        movsxd      rcx,        DWORD PTR arg(6) ;rows in a macroblock
.nextrow:
        xor         rdx,        rdx              ;col
.nextcol:
        ;load current and next 2 rows
        movdqu      xmm0,       XMMWORD PTR [rsi]
        movdqu      xmm1,       XMMWORD PTR [rsi + rax]
        movdqu      xmm3,       XMMWORD PTR [rsi + 2*rax]

        FIRST_2_ROWS

        ;load above 2 rows
        neg         rax
        movdqu      xmm1,       XMMWORD PTR [rsi + 2*rax]
        movdqu      xmm3,       XMMWORD PTR [rsi + rax]

        SECOND_2_ROWS

        movdqu      XMMWORD PTR [rdi], xmm0

        neg         rax                          ; positive stride
        add         rsi,        16
        add         rdi,        16

        add         rdx,        16
        cmp         edx,        dword arg(4)     ;cols
        jge         .downdone
        UPDATE_FLIMIT
        jmp         .nextcol

.downdone:
        ; done with the all cols, start the across filtering in place
        sub         rsi,        rdx
        sub         rdi,        rdx

        mov         rbx,        arg(5) ; flimits
        UPDATE_FLIMIT

        ; dup the first byte into the left border 8 times
        movq        mm1,   [rdi]
        punpcklbw   mm1,   mm1
        punpcklwd   mm1,   mm1
        punpckldq   mm1,   mm1
        mov         rdx,    -8
        movq        [rdi+rdx], mm1

        ; dup the last byte into the right border
        movsxd      rdx,    dword arg(4)
        movq        mm1,   [rdi + rdx + -1]
        punpcklbw   mm1,   mm1
        punpcklwd   mm1,   mm1
        punpckldq   mm1,   mm1
        movq        [rdi+rdx], mm1

        xor         rdx,        rdx
        movq        mm0,        QWORD PTR [rdi-16];
        movq        mm1,        QWORD PTR [rdi-8];

.acrossnextcol:
        movdqu      xmm0,       XMMWORD PTR [rdi + rdx]
        movdqu      xmm1,       XMMWORD PTR [rdi + rdx -2]
        movdqu      xmm3,       XMMWORD PTR [rdi + rdx -1]

        FIRST_2_ROWS

        movdqu      xmm1,       XMMWORD PTR [rdi + rdx +1]
        movdqu      xmm3,       XMMWORD PTR [rdi + rdx +2]

        SECOND_2_ROWS

        movq        QWORD PTR [rdi+rdx-16], mm0  ; store previous 8 bytes
        movq        QWORD PTR [rdi+rdx-8], mm1   ; store previous 8 bytes
        movdq2q     mm0,        xmm0
        psrldq      xmm0,       8
        movdq2q     mm1,        xmm0

        add         rdx,        16
        cmp         edx,        dword arg(4)     ;cols
        jge         .acrossdone
        UPDATE_FLIMIT
        jmp         .acrossnextcol

.acrossdone:
        ; last 16 pixels
        movq        QWORD PTR [rdi+rdx-16], mm0

        cmp         edx,        dword arg(4)
        jne         .throw_last_8
        movq        QWORD PTR [rdi+rdx-8], mm1
.throw_last_8:
        ; done with this rwo
        add         rsi,rax                      ;next src line
        mov         eax, dword arg(3)            ;dst_pixels_per_line
        add         rdi,rax                      ;next destination
        mov         eax, dword arg(2)            ;src_pixels_per_line

        mov         rbx,        arg(5)           ;flimits
        UPDATE_FLIMIT

        dec         rcx                          ;decrement count
        jnz         .nextrow                     ;next row

    add rsp, 16
    pop rsp
    ; begin epilog
    pop rdi
    pop rsi
    pop rbx
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret
%undef flimit


;void vpx_mbpost_proc_across_ip_sse2(unsigned char *src,
;                                    int pitch, int rows, int cols,int flimit)
global sym(vpx_mbpost_proc_across_ip_sse2) PRIVATE
sym(vpx_mbpost_proc_across_ip_sse2):
    push        rbp
    mov         rbp, rsp
    SHADOW_ARGS_TO_STACK 5
    SAVE_XMM 7
    GET_GOT     rbx
    push        rsi
    push        rdi
    ; end prolog

    ALIGN_STACK 16, rax
    sub         rsp, 16

    ; create flimit4 at [rsp]
    mov         eax, dword ptr arg(4) ;flimit
    mov         [rsp], eax
    mov         [rsp+4], eax
    mov         [rsp+8], eax
    mov         [rsp+12], eax
%define flimit4 [rsp]


    ;for(r=0;r<rows;r++)
.ip_row_loop:

        xor         rdx,    rdx ;sumsq=0;
        xor         rcx,    rcx ;sum=0;
        mov         rsi,    arg(0); s


        ; dup the first byte into the left border 8 times
        movq        mm1,   [rsi]
        punpcklbw   mm1,   mm1
        punpcklwd   mm1,   mm1
        punpckldq   mm1,   mm1

        mov         rdi,    -8
        movq        [rsi+rdi], mm1

        ; dup the last byte into the right border
        movsxd      rdx,    dword arg(3)
        movq        mm1,   [rsi + rdx + -1]
        punpcklbw   mm1,   mm1
        punpcklwd   mm1,   mm1
        punpckldq   mm1,   mm1
        movq        [rsi+rdx], mm1

.ip_var_loop:
        ;for(i=-8;i<=6;i++)
        ;{
        ;    sumsq += s[i]*s[i];
        ;    sum   += s[i];
        ;}
        movzx       eax, byte [rsi+rdi]
        add         ecx, eax
        mul         al
        add         edx, eax
        add         rdi, 1
        cmp         rdi, 6
        jle         .ip_var_loop


            ;mov         rax,    sumsq
            ;movd        xmm7,   rax
            movd        xmm7,   edx

            ;mov         rax,    sum
            ;movd        xmm6,   rax
            movd        xmm6,   ecx

            mov         rsi,    arg(0) ;s
            xor         rcx,    rcx

            movsxd      rdx,    dword arg(3) ;cols
            add         rdx,    8
            pxor        mm0,    mm0
            pxor        mm1,    mm1

            pxor        xmm0,   xmm0
.nextcol4:

            movd        xmm1,   DWORD PTR [rsi+rcx-8]   ; -8 -7 -6 -5
            movd        xmm2,   DWORD PTR [rsi+rcx+7]   ; +7 +8 +9 +10

            punpcklbw   xmm1,   xmm0                    ; expanding
            punpcklbw   xmm2,   xmm0                    ; expanding

            punpcklwd   xmm1,   xmm0                    ; expanding to dwords
            punpcklwd   xmm2,   xmm0                    ; expanding to dwords

            psubd       xmm2,   xmm1                    ; 7--8   8--7   9--6 10--5
            paddd       xmm1,   xmm1                    ; -8*2   -7*2   -6*2 -5*2

            paddd       xmm1,   xmm2                    ; 7+-8   8+-7   9+-6 10+-5
            pmaddwd     xmm1,   xmm2                    ; squared of 7+-8   8+-7   9+-6 10+-5

            paddd       xmm6,   xmm2
            paddd       xmm7,   xmm1

            pshufd      xmm6,   xmm6,   0               ; duplicate the last ones
            pshufd      xmm7,   xmm7,   0               ; duplicate the last ones

            psrldq      xmm1,       4                   ; 8--7   9--6 10--5  0000
            psrldq      xmm2,       4                   ; 8--7   9--6 10--5  0000

            pshufd      xmm3,   xmm1,   3               ; 0000  8--7   8--7   8--7 squared
            pshufd      xmm4,   xmm2,   3               ; 0000  8--7   8--7   8--7 squared

            paddd       xmm6,   xmm4
            paddd       xmm7,   xmm3

            pshufd      xmm3,   xmm1,   01011111b       ; 0000  0000   9--6   9--6 squared
            pshufd      xmm4,   xmm2,   01011111b       ; 0000  0000   9--6   9--6 squared

            paddd       xmm7,   xmm3
            paddd       xmm6,   xmm4

            pshufd      xmm3,   xmm1,   10111111b       ; 0000  0000   8--7   8--7 squared
            pshufd      xmm4,   xmm2,   10111111b       ; 0000  0000   8--7   8--7 squared

            paddd       xmm7,   xmm3
            paddd       xmm6,   xmm4

            movdqa      xmm3,   xmm6
            pmaddwd     xmm3,   xmm3

            movdqa      xmm5,   xmm7
            pslld       xmm5,   4

            psubd       xmm5,   xmm7
            psubd       xmm5,   xmm3

            psubd       xmm5,   flimit4
            psrad       xmm5,   31

            packssdw    xmm5,   xmm0
            packsswb    xmm5,   xmm0

            movd        xmm1,   DWORD PTR [rsi+rcx]
            movq        xmm2,   xmm1

            punpcklbw   xmm1,   xmm0
            punpcklwd   xmm1,   xmm0

            paddd       xmm1,   xmm6
            paddd       xmm1,   [GLOBAL(four8s)]

            psrad       xmm1,   4
            packssdw    xmm1,   xmm0

            packuswb    xmm1,   xmm0
            pand        xmm1,   xmm5

            pandn       xmm5,   xmm2
            por         xmm5,   xmm1

            movd        [rsi+rcx-8],  mm0
            movq        mm0,    mm1

            movdq2q     mm1,    xmm5
            psrldq      xmm7,   12

            psrldq      xmm6,   12
            add         rcx,    4

            cmp         rcx,    rdx
            jl          .nextcol4

        ;s+=pitch;
        movsxd rax, dword arg(1)
        add    arg(0), rax

        sub dword arg(2), 1 ;rows-=1
        cmp dword arg(2), 0
        jg .ip_row_loop

    add         rsp, 16
    pop         rsp

    ; begin epilog
    pop rdi
    pop rsi
    RESTORE_GOT
    RESTORE_XMM
    UNSHADOW_ARGS
    pop         rbp
    ret
%undef flimit4


SECTION_RODATA
align 16
four8s:
    times 4 dd 8
