Hu Chunming / FFNvDecoder

;******************************************************************************
;* VP9 loop filter SIMD optimizations
;*
;* Copyright (C) 2013-2014 Clément Bœsch <u pkh me>
;* Copyright (C) 2014 Ronald S. Bultje <rsbultje@gmail.com>
;*
;* This file is part of FFmpeg.
;*
;* FFmpeg is free software; you can redistribute it and/or
;* modify it under the terms of the GNU Lesser General Public
;* License as published by the Free Software Foundation; either
;* version 2.1 of the License, or (at your option) any later version.
;*
;* FFmpeg is distributed in the hope that it will be useful,
;* but WITHOUT ANY WARRANTY; without even the implied warranty of
;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;* Lesser General Public License for more details.
;*
;* You should have received a copy of the GNU Lesser General Public
;* License along with FFmpeg; if not, write to the Free Software
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;******************************************************************************

%include "libavutil/x86/x86util.asm"

SECTION_RODATA

cextern pb_3
cextern pb_80

pb_4:   times 16 db 0x04
pb_10:  times 16 db 0x10
pb_40:  times 16 db 0x40
pb_81:  times 16 db 0x81
pb_f8:  times 16 db 0xf8
pb_fe:  times 16 db 0xfe
pb_ff:  times 16 db 0xff

cextern pw_4
cextern pw_8

; with mix functions, two 8-bit thresholds are stored in a 16-bit storage,
; the following mask is used to splat both in the same register
mask_mix: times 8 db 0
          times 8 db 1

mask_mix84: times 8 db 0xff
            times 8 db 0x00
mask_mix48: times 8 db 0x00
            times 8 db 0xff

SECTION .text

%macro SCRATCH 3
%ifdef m8
    SWAP                %1, %2
%else
    mova              [%3], m%1
%endif
%endmacro

%macro UNSCRATCH 3
%ifdef m8
    SWAP                %1, %2
%else
    mova               m%1, [%3]
%endif
%endmacro

; %1 = abs(%2-%3)
%macro ABSSUB 4 ; dst, src1 (RO), src2 (RO), tmp
%ifdef m8
    psubusb             %1, %3, %2
    psubusb             %4, %2, %3
%else
    mova                %1, %3
    mova                %4, %2
    psubusb             %1, %2
    psubusb             %4, %3
%endif
    por                 %1, %4
%endmacro

; %1 = %1>%2
%macro CMP_GT 2-3 ; src/dst, cmp, pb_80
%if %0 == 3
    pxor                %1, %3
%endif
    pcmpgtb             %1, %2
%endmacro

; %1 = abs(%2-%3) > %4
%macro ABSSUB_GT 5-6 [pb_80]; dst, src1, src2, cmp, tmp, [pb_80]
    ABSSUB              %1, %2, %3, %5      ; dst = abs(src1-src2)
    CMP_GT              %1, %4, %6          ; dst > cmp
%endmacro

%macro MASK_APPLY 4 ; %1=new_data/dst %2=old_data %3=mask %4=tmp
    pand                %1, %3              ; new &= mask
    pandn               %4, %3, %2          ; tmp = ~mask & old
    por                 %1, %4              ; new&mask | old&~mask
%endmacro

%macro UNPACK 4
%ifdef m8
    punpck%1bw          %2, %3, %4
%else
    mova                %2, %3
    punpck%1bw          %2, %4
%endif
%endmacro

%macro FILTER_SUBx2_ADDx2 11 ; %1=dst %2=h/l %3=cache %4=stack_off %5=sub1 %6=sub2 %7=add1
                             ; %8=add2 %9=rshift, [unpack], [unpack_is_mem_on_x86_32]
    psubw               %3, [rsp+%4+%5*mmsize*2]
    psubw               %3, [rsp+%4+%6*mmsize*2]
    paddw               %3, [rsp+%4+%7*mmsize*2]
%ifnidn %10, ""
%if %11 == 0
    punpck%2bw          %1, %10, m0
%else
    UNPACK          %2, %1, %10, m0
%endif
    mova [rsp+%4+%8*mmsize*2], %1
    paddw               %3, %1
%else
    paddw               %3, [rsp+%4+%8*mmsize*2]
%endif
    psraw               %1, %3, %9
%endmacro

; FIXME interleave l/h better (for instruction pairing)
%macro FILTER_INIT 9 ; tmp1, tmp2, cacheL, cacheH, dstp, stack_off, filterid, mask, source
    FILTER%7_INIT       %1, l, %3, %6 +      0
    FILTER%7_INIT       %2, h, %4, %6 + mmsize
    packuswb            %1, %2
    MASK_APPLY          %1, %9, %8, %2
    mova                %5, %1
%endmacro


%macro FILTER_UPDATE 12-16 "", "", "", 0 ; tmp1, tmp2, cacheL, cacheH, dstp, stack_off, -, -, +, +, rshift,
                                         ; mask, [source], [unpack + src], [unpack_is_mem_on_x86_32]
; FIXME interleave this properly with the subx2/addx2
%ifnidn %15, ""
%if %16 == 0 || ARCH_X86_64
    mova               %14, %15
%endif
%endif
    FILTER_SUBx2_ADDx2  %1, l, %3, %6 +      0, %7, %8, %9, %10, %11, %14, %16
    FILTER_SUBx2_ADDx2  %2, h, %4, %6 + mmsize, %7, %8, %9, %10, %11, %14, %16
    packuswb            %1, %2
%ifnidn %13, ""
    MASK_APPLY          %1, %13, %12, %2
%else
    MASK_APPLY          %1, %5, %12, %2
%endif
    mova                %5, %1
%endmacro

%macro SRSHIFT3B_2X 4 ; reg1, reg2, [pb_10], tmp
    mova                %4, [pb_f8]
    pand                %1, %4
    pand                %2, %4
    psrlq               %1, 3
    psrlq               %2, 3
    pxor                %1, %3
    pxor                %2, %3
    psubb               %1, %3
    psubb               %2, %3
%endmacro

%macro EXTRACT_POS_NEG 3 ; i8, neg, pos
    pxor                %3, %3
    pxor                %2, %2
    pcmpgtb             %3, %1                          ; i8 < 0 mask
    psubb               %2, %1                          ; neg values (only the originally - will be kept)
    pand                %2, %3                          ; negative values of i8 (but stored as +)
    pandn               %3, %1                          ; positive values of i8
%endmacro

; clip_u8(u8 + i8)
%macro SIGN_ADD 4 ; dst, u8, i8, tmp1
    EXTRACT_POS_NEG     %3, %4, %1
    paddusb             %1, %2                          ; add the positives
    psubusb             %1, %4                          ; sub the negatives
%endmacro

; clip_u8(u8 - i8)
%macro SIGN_SUB 4 ; dst, u8, i8, tmp1
    EXTRACT_POS_NEG     %3, %1, %4
    paddusb             %1, %2                          ; add the negatives
    psubusb             %1, %4                          ; sub the positives
%endmacro

%macro FILTER6_INIT 4 ; %1=dst %2=h/l %3=cache, %4=stack_off
    UNPACK          %2, %1, rp3, m0                     ; p3: B->W
    mova [rsp+%4+0*mmsize*2], %1
    paddw               %3, %1, %1                      ; p3*2
    paddw               %3, %1                          ; p3*3
    punpck%2bw          %1, m1,  m0                     ; p2: B->W
    mova [rsp+%4+1*mmsize*2], %1
    paddw               %3, %1                          ; p3*3 + p2
    paddw               %3, %1                          ; p3*3 + p2*2
    UNPACK          %2, %1, rp1, m0                     ; p1: B->W
    mova [rsp+%4+2*mmsize*2], %1
    paddw               %3, %1                          ; p3*3 + p2*2 + p1
    UNPACK          %2, %1, rp0, m0                     ; p0: B->W
    mova [rsp+%4+3*mmsize*2], %1
    paddw               %3, %1                          ; p3*3 + p2*2 + p1 + p0
    UNPACK          %2, %1, rq0, m0                     ; q0: B->W
    mova [rsp+%4+4*mmsize*2], %1
    paddw               %3, %1                          ; p3*3 + p2*2 + p1 + p0 + q0
    paddw               %3, [pw_4]                      ; p3*3 + p2*2 + p1 + p0 + q0 + 4
    psraw               %1, %3, 3                       ; (p3*3 + p2*2 + p1 + p0 + q0 + 4) >> 3
%endmacro

%macro FILTER14_INIT 4 ; %1=dst %2=h/l %3=cache, %4=stack_off
    punpck%2bw          %1, m2, m0                      ; p7: B->W
    mova [rsp+%4+ 8*mmsize*2], %1
    psllw               %3, %1, 3                       ; p7*8
    psubw               %3, %1                          ; p7*7
    punpck%2bw          %1, m3, m0                      ; p6: B->W
    mova [rsp+%4+ 9*mmsize*2], %1
    paddw               %3, %1                          ; p7*7 + p6
    paddw               %3, %1                          ; p7*7 + p6*2
    UNPACK          %2, %1, rp5, m0                     ; p5: B->W
    mova [rsp+%4+10*mmsize*2], %1
    paddw               %3, %1                          ; p7*7 + p6*2 + p5
    UNPACK          %2, %1, rp4, m0                     ; p4: B->W
    mova [rsp+%4+11*mmsize*2], %1
    paddw               %3, %1                          ; p7*7 + p6*2 + p5 + p4
    paddw               %3, [rsp+%4+ 0*mmsize*2]        ; p7*7 + p6*2 + p5 + p4 + p3
    paddw               %3, [rsp+%4+ 1*mmsize*2]        ; p7*7 + p6*2 + p5 + .. + p2
    paddw               %3, [rsp+%4+ 2*mmsize*2]        ; p7*7 + p6*2 + p5 + .. + p1
    paddw               %3, [rsp+%4+ 3*mmsize*2]        ; p7*7 + p6*2 + p5 + .. + p0
    paddw               %3, [rsp+%4+ 4*mmsize*2]        ; p7*7 + p6*2 + p5 + .. + p0 + q0
    paddw               %3, [pw_8]                      ; p7*7 + p6*2 + p5 + .. + p0 + q0 + 8
    psraw               %1, %3, 4                       ; (p7*7 + p6*2 + p5 + .. + p0 + q0 + 8) >> 4
%endmacro

%macro TRANSPOSE16x16B 17
    mova %17, m%16
    SBUTTERFLY bw,  %1,  %2,  %16
    SBUTTERFLY bw,  %3,  %4,  %16
    SBUTTERFLY bw,  %5,  %6,  %16
    SBUTTERFLY bw,  %7,  %8,  %16
    SBUTTERFLY bw,  %9,  %10, %16
    SBUTTERFLY bw,  %11, %12, %16
    SBUTTERFLY bw,  %13, %14, %16
    mova m%16,  %17
    mova  %17, m%14
    SBUTTERFLY bw,  %15, %16, %14
    SBUTTERFLY wd,  %1,  %3,  %14
    SBUTTERFLY wd,  %2,  %4,  %14
    SBUTTERFLY wd,  %5,  %7,  %14
    SBUTTERFLY wd,  %6,  %8,  %14
    SBUTTERFLY wd,  %9,  %11, %14
    SBUTTERFLY wd,  %10, %12, %14
    SBUTTERFLY wd,  %13, %15, %14
    mova m%14,  %17
    mova  %17, m%12
    SBUTTERFLY wd,  %14, %16, %12
    SBUTTERFLY dq,  %1,  %5,  %12
    SBUTTERFLY dq,  %2,  %6,  %12
    SBUTTERFLY dq,  %3,  %7,  %12
    SBUTTERFLY dq,  %4,  %8,  %12
    SBUTTERFLY dq,  %9,  %13, %12
    SBUTTERFLY dq,  %10, %14, %12
    SBUTTERFLY dq,  %11, %15, %12
    mova m%12, %17
    mova  %17, m%8
    SBUTTERFLY dq,  %12, %16, %8
    SBUTTERFLY qdq, %1,  %9,  %8
    SBUTTERFLY qdq, %2,  %10, %8
    SBUTTERFLY qdq, %3,  %11, %8
    SBUTTERFLY qdq, %4,  %12, %8
    SBUTTERFLY qdq, %5,  %13, %8
    SBUTTERFLY qdq, %6,  %14, %8
    SBUTTERFLY qdq, %7,  %15, %8
    mova m%8, %17
    mova %17, m%1
    SBUTTERFLY qdq, %8,  %16, %1
    mova m%1, %17
    SWAP %2,  %9
    SWAP %3,  %5
    SWAP %4,  %13
    SWAP %6,  %11
    SWAP %8,  %15
    SWAP %12, %14
%endmacro

%macro TRANSPOSE8x8B 13
    SBUTTERFLY bw,  %1, %2, %7
    movdq%10 m%7, %9
    movdqa %11, m%2
    SBUTTERFLY bw,  %3, %4, %2
    SBUTTERFLY bw,  %5, %6, %2
    SBUTTERFLY bw,  %7, %8, %2
    SBUTTERFLY wd,  %1, %3, %2
    movdqa m%2, %11
    movdqa %11, m%3
    SBUTTERFLY wd,  %2, %4, %3
    SBUTTERFLY wd,  %5, %7, %3
    SBUTTERFLY wd,  %6, %8, %3
    SBUTTERFLY dq, %1, %5, %3
    SBUTTERFLY dq, %2, %6, %3
    movdqa m%3, %11
    movh   %12, m%2
    movhps %13, m%2
    SBUTTERFLY dq, %3, %7, %2
    SBUTTERFLY dq, %4, %8, %2
    SWAP %2, %5
    SWAP %4, %7
%endmacro

%macro DEFINE_REAL_P7_TO_Q7 0-1 0
%define P7 dstq  + 4*mstrideq  + %1
%define P6 dstq  +   mstride3q + %1
%define P5 dstq  + 2*mstrideq  + %1
%define P4 dstq  +   mstrideq  + %1
%define P3 dstq                + %1
%define P2 dstq  +    strideq  + %1
%define P1 dstq  + 2* strideq  + %1
%define P0 dstq  +    stride3q + %1
%define Q0 dstq  + 4* strideq  + %1
%define Q1 dst2q +   mstride3q + %1
%define Q2 dst2q + 2*mstrideq  + %1
%define Q3 dst2q +   mstrideq  + %1
%define Q4 dst2q               + %1
%define Q5 dst2q +    strideq  + %1
%define Q6 dst2q + 2* strideq  + %1
%define Q7 dst2q +    stride3q + %1
%endmacro

%macro DEFINE_TRANSPOSED_P7_TO_Q7 0-1 0
%define P3 rsp +  0*mmsize + %1
%define P2 rsp +  1*mmsize + %1
%define P1 rsp +  2*mmsize + %1
%define P0 rsp +  3*mmsize + %1
%define Q0 rsp +  4*mmsize + %1
%define Q1 rsp +  5*mmsize + %1
%define Q2 rsp +  6*mmsize + %1
%define Q3 rsp +  7*mmsize + %1
%if mmsize == 16
%define P7 rsp +  8*mmsize + %1
%define P6 rsp +  9*mmsize + %1
%define P5 rsp + 10*mmsize + %1
%define P4 rsp + 11*mmsize + %1
%define Q4 rsp + 12*mmsize + %1
%define Q5 rsp + 13*mmsize + %1
%define Q6 rsp + 14*mmsize + %1
%define Q7 rsp + 15*mmsize + %1
%endif
%endmacro

; ..............AB -> AAAAAAAABBBBBBBB
%macro SPLATB_MIX 1-2 [mask_mix]
%if cpuflag(ssse3)
    pshufb     %1, %2
%else
    punpcklbw  %1, %1
    punpcklwd  %1, %1
    punpckldq  %1, %1
%endif
%endmacro

%macro LOOPFILTER 5 ; %1=v/h %2=size1 %3+%4=stack, %5=mmx/32bit stack only
%assign %%ext 0
%if ARCH_X86_32 || mmsize == 8
%assign %%ext %5
%endif

%if UNIX64
cglobal vp9_loop_filter_%1_%2_ %+ mmsize, 5, 9, 16, %3 + %4 + %%ext, dst, stride, E, I, H, mstride, dst2, stride3, mstride3
%else
%if WIN64
cglobal vp9_loop_filter_%1_%2_ %+ mmsize, 4, 8, 16, %3 + %4 + %%ext, dst, stride, E, I, mstride, dst2, stride3, mstride3
%else
cglobal vp9_loop_filter_%1_%2_ %+ mmsize, 2, 6, 16, %3 + %4 + %%ext, dst, stride, mstride, dst2, stride3, mstride3
%define Ed dword r2m
%define Id dword r3m
%endif
%define Hd dword r4m
%endif

    mov               mstrideq, strideq
    neg               mstrideq

    lea               stride3q, [strideq*3]
    lea              mstride3q, [mstrideq*3]

%ifidn %1, h
%if %2 != 16
%if mmsize == 16
%define movx movh
%else
%define movx mova
%endif
    lea                   dstq, [dstq + 4*strideq - 4]
%else
%define movx movu
    lea                   dstq, [dstq + 4*strideq - 8] ; go from top center (h pos) to center left (v pos)
%endif
%else
    lea                   dstq, [dstq + 4*mstrideq]
%endif
    ; FIXME we shouldn't need two dts registers if mmsize == 8
    lea                  dst2q, [dstq + 8*strideq]

    DEFINE_REAL_P7_TO_Q7

%ifidn %1, h
    movx                    m0, [P7]
    movx                    m1, [P6]
    movx                    m2, [P5]
    movx                    m3, [P4]
    movx                    m4, [P3]
    movx                    m5, [P2]
%if (ARCH_X86_64 && mmsize == 16) || %2 > 16
    movx                    m6, [P1]
%endif
    movx                    m7, [P0]
%ifdef m8
    movx                    m8, [Q0]
    movx                    m9, [Q1]
    movx                   m10, [Q2]
    movx                   m11, [Q3]
    movx                   m12, [Q4]
    movx                   m13, [Q5]
    movx                   m14, [Q6]
    movx                   m15, [Q7]
    DEFINE_TRANSPOSED_P7_TO_Q7
%if %2 == 16
    TRANSPOSE16x16B 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, [rsp]
    mova           [P7],  m0
    mova           [P6],  m1
    mova           [P5],  m2
    mova           [P4],  m3
%else ; %2 == 44/48/84/88
    ; 8x16 transpose
    punpcklbw        m0,  m1
    punpcklbw        m2,  m3
    punpcklbw        m4,  m5
    punpcklbw        m6,  m7
    punpcklbw        m8,  m9
    punpcklbw       m10, m11
    punpcklbw       m12, m13
    punpcklbw       m14, m15
    TRANSPOSE8x8W     0, 2, 4, 6, 8, 10, 12, 14, 15
    SWAP              0,  4
    SWAP              2,  5
    SWAP              0,  6
    SWAP              0,  7
    SWAP             10,  9
    SWAP             12, 10
    SWAP             14, 11
%endif ; %2
    mova           [P3],  m4
    mova           [P2],  m5
    mova           [P1],  m6
    mova           [P0],  m7
    mova           [Q0],  m8
    mova           [Q1],  m9
    mova           [Q2], m10
    mova           [Q3], m11
%if %2 == 16
    mova           [Q4], m12
    mova           [Q5], m13
    mova           [Q6], m14
    mova           [Q7], m15
%endif ; %2
%else ; x86-32
%if %2 == 16
    TRANSPOSE8x8B    0, 1, 2, 3, 4, 5, 6, 7, [P1], u, [rsp+%3+%4], [rsp+64], [rsp+80]
    DEFINE_TRANSPOSED_P7_TO_Q7
    movh          [P7], m0
    movh          [P5], m1
    movh          [P3], m2
    movh          [P1], m3
    movh          [Q2], m5
    movh          [Q4], m6
    movh          [Q6], m7
    movhps        [P6], m0
    movhps        [P4], m1
    movhps        [P2], m2
    movhps        [P0], m3
    movhps        [Q3], m5
    movhps        [Q5], m6
    movhps        [Q7], m7
    DEFINE_REAL_P7_TO_Q7
    movx                    m0, [Q0]
    movx                    m1, [Q1]
    movx                    m2, [Q2]
    movx                    m3, [Q3]
    movx                    m4, [Q4]
    movx                    m5, [Q5]
    movx                    m7, [Q7]
    TRANSPOSE8x8B 0, 1, 2, 3, 4, 5, 6, 7, [Q6], u, [rsp+%3+%4], [rsp+72], [rsp+88]
    DEFINE_TRANSPOSED_P7_TO_Q7 8
    movh          [P7], m0
    movh          [P5], m1
    movh          [P3], m2
    movh          [P1], m3
    movh          [Q2], m5
    movh          [Q4], m6
    movh          [Q6], m7
    movhps        [P6], m0
    movhps        [P4], m1
    movhps        [P2], m2
    movhps        [P0], m3
    movhps        [Q3], m5
    movhps        [Q5], m6
    movhps        [Q7], m7
    DEFINE_TRANSPOSED_P7_TO_Q7
%elif %2 > 16 ; %2 == 44/48/84/88
    punpcklbw        m0, m1
    punpcklbw        m2, m3
    punpcklbw        m4, m5
    punpcklbw        m6, m7
    movx             m1, [Q0]
    movx             m3, [Q1]
    movx             m5, [Q2]
    movx             m7, [Q3]
    punpcklbw        m1, m3
    punpcklbw        m5, m7
    movx             m3, [Q4]
    movx             m7, [Q5]
    punpcklbw        m3, m7
    mova          [rsp], m3
    movx             m3, [Q6]
    movx             m7, [Q7]
    punpcklbw        m3, m7
    DEFINE_TRANSPOSED_P7_TO_Q7
    TRANSPOSE8x8W     0, 2, 4, 6, 1, 5, 7, 3, [rsp], [Q0], 1
    mova           [P3],  m0
    mova           [P2],  m2
    mova           [P1],  m4
    mova           [P0],  m6
    mova           [Q1],  m5
    mova           [Q2],  m7
    mova           [Q3],  m3
%else ; %2 == 4 || %2 == 8
    SBUTTERFLY       bw, 0, 1, 6
    SBUTTERFLY       bw, 2, 3, 6
    SBUTTERFLY       bw, 4, 5, 6
    mova [rsp+4*mmsize], m5
    mova             m6, [P1]
    SBUTTERFLY       bw, 6, 7, 5
    DEFINE_TRANSPOSED_P7_TO_Q7
    TRANSPOSE4x4W     0, 2, 4, 6, 5
    mova           [P3], m0
    mova           [P2], m2
    mova           [P1], m4
    mova           [P0], m6
    mova             m5, [rsp+4*mmsize]
    TRANSPOSE4x4W     1, 3, 5, 7, 0
    mova           [Q0], m1
    mova           [Q1], m3
    mova           [Q2], m5
    mova           [Q3], m7
%endif ; %2
%endif ; x86-32/64
%endif ; %1 == h

    ; calc fm mask
%if %2 == 16 || mmsize == 8
%if cpuflag(ssse3)
    pxor                m0, m0
%endif
    SPLATB_REG          m2, I, m0                       ; I I I I ...
    SPLATB_REG          m3, E, m0                       ; E E E E ...
%else
%if cpuflag(ssse3)
    mova                m0, [mask_mix]
%endif
    movd                m2, Id
    movd                m3, Ed
    SPLATB_MIX          m2, m0
    SPLATB_MIX          m3, m0
%endif
    mova                m0, [pb_80]
    pxor                m2, m0
    pxor                m3, m0
%ifdef m8
%ifidn %1, v
    mova                m8, [P3]
    mova                m9, [P2]
    mova               m10, [P1]
    mova               m11, [P0]
    mova               m12, [Q0]
    mova               m13, [Q1]
    mova               m14, [Q2]
    mova               m15, [Q3]
%else
    ; In case of horizontal, P3..Q3 are already present in some registers due
    ; to the previous transpose, so we just swap registers.
    SWAP                 8,  4, 12
    SWAP                 9,  5, 13
    SWAP                10,  6, 14
    SWAP                11,  7, 15
%endif
%define rp3 m8
%define rp2 m9
%define rp1 m10
%define rp0 m11
%define rq0 m12
%define rq1 m13
%define rq2 m14
%define rq3 m15
%else
%define rp3 [P3]
%define rp2 [P2]
%define rp1 [P1]
%define rp0 [P0]
%define rq0 [Q0]
%define rq1 [Q1]
%define rq2 [Q2]
%define rq3 [Q3]
%endif
    ABSSUB_GT           m5, rp3, rp2, m2, m7, m0        ; m5 = abs(p3-p2) <= I
    ABSSUB_GT           m1, rp2, rp1, m2, m7, m0        ; m1 = abs(p2-p1) <= I
    por                 m5, m1
    ABSSUB_GT           m1, rp1, rp0, m2, m7, m0        ; m1 = abs(p1-p0) <= I
    por                 m5, m1
    ABSSUB_GT           m1, rq0, rq1, m2, m7, m0        ; m1 = abs(q1-q0) <= I
    por                 m5, m1
    ABSSUB_GT           m1, rq1, rq2, m2, m7, m0        ; m1 = abs(q2-q1) <= I
    por                 m5, m1
    ABSSUB_GT           m1, rq2, rq3, m2, m7, m0        ; m1 = abs(q3-q2) <= I
    por                 m5, m1
    ABSSUB              m1, rp0, rq0, m7                ; abs(p0-q0)
    paddusb             m1, m1                          ; abs(p0-q0) * 2
    ABSSUB              m2, rp1, rq1, m7                ; abs(p1-q1)
    pand                m2, [pb_fe]                     ; drop lsb so shift can work
    psrlq               m2, 1                           ; abs(p1-q1)/2
    paddusb             m1, m2                          ; abs(p0-q0)*2 + abs(p1-q1)/2
    pxor                m1, m0
    pcmpgtb             m1, m3
    por                 m1, m5                          ; fm final value
    SWAP                 1, 3
    pxor                m3, [pb_ff]

    ; (m3: fm, m8..15: p3 p2 p1 p0 q0 q1 q2 q3)
    ; calc flat8in (if not 44_16) and hev masks
%if %2 != 44 && %2 != 4
    mova                m6, [pb_81]                     ; [1 1 1 1 ...] ^ 0x80
    ABSSUB_GT           m2, rp3, rp0, m6, m5            ; abs(p3 - p0) <= 1
%ifdef m8
    mova                m8, [pb_80]
%define rb80 m8
%else
%define rb80 [pb_80]
%endif
    ABSSUB_GT           m1, rp2, rp0, m6, m5, rb80      ; abs(p2 - p0) <= 1
    por                 m2, m1
    ABSSUB              m4, rp1, rp0, m5                ; abs(p1 - p0)
%if %2 <= 16
%if cpuflag(ssse3)
    pxor                m0, m0
%endif
    SPLATB_REG          m7, H, m0                       ; H H H H ...
%else
    movd                m7, Hd
    SPLATB_MIX          m7
%endif
    pxor                m7, rb80
    pxor                m4, rb80
    pcmpgtb             m0, m4, m7                      ; abs(p1 - p0) > H (1/2 hev condition)
    CMP_GT              m4, m6                          ; abs(p1 - p0) <= 1
    por                 m2, m4                          ; (flat8in)
    ABSSUB              m4, rq1, rq0, m1                ; abs(q1 - q0)
    pxor                m4, rb80
    pcmpgtb             m5, m4, m7                      ; abs(q1 - q0) > H (2/2 hev condition)
    por                 m0, m5                          ; hev final value
    CMP_GT              m4, m6                          ; abs(q1 - q0) <= 1
    por                 m2, m4                          ; (flat8in)
    ABSSUB_GT           m1, rq2, rq0, m6, m5, rb80      ; abs(q2 - q0) <= 1
    por                 m2, m1
    ABSSUB_GT           m1, rq3, rq0, m6, m5, rb80      ; abs(q3 - q0) <= 1
    por                 m2, m1                          ; flat8in final value
    pxor                m2, [pb_ff]
%if %2 == 84 || %2 == 48
    pand                m2, [mask_mix%2]
%endif
%else
    mova                m6, [pb_80]
%if %2 == 44
    movd                m7, Hd
    SPLATB_MIX          m7
%else
%if cpuflag(ssse3)
    pxor                m0, m0
%endif
    SPLATB_REG          m7, H, m0                       ; H H H H ...
%endif
    pxor                m7, m6
    ABSSUB              m4, rp1, rp0, m1                ; abs(p1 - p0)
    pxor                m4, m6
    pcmpgtb             m0, m4, m7                      ; abs(p1 - p0) > H (1/2 hev condition)
    ABSSUB              m4, rq1, rq0, m1                ; abs(q1 - q0)
    pxor                m4, m6
    pcmpgtb             m5, m4, m7                      ; abs(q1 - q0) > H (2/2 hev condition)
    por                 m0, m5                          ; hev final value
%endif

%if %2 == 16
    ; (m0: hev, m2: flat8in, m3: fm, m6: pb_81, m9..15: p2 p1 p0 q0 q1 q2 q3)
    ; calc flat8out mask
%ifdef m8
    mova                m8, [P7]
    mova                m9, [P6]
%define rp7 m8
%define rp6 m9
%else
%define rp7 [P7]
%define rp6 [P6]
%endif
    ABSSUB_GT           m1, rp7, rp0, m6, m5            ; abs(p7 - p0) <= 1
    ABSSUB_GT           m7, rp6, rp0, m6, m5            ; abs(p6 - p0) <= 1
    por                 m1, m7
%ifdef m8
    mova                m8, [P5]
    mova                m9, [P4]
%define rp5 m8
%define rp4 m9
%else
%define rp5 [P5]
%define rp4 [P4]
%endif
    ABSSUB_GT           m7, rp5, rp0, m6, m5            ; abs(p5 - p0) <= 1
    por                 m1, m7
    ABSSUB_GT           m7, rp4, rp0, m6, m5            ; abs(p4 - p0) <= 1
    por                 m1, m7
%ifdef m8
    mova                m14, [Q4]
    mova                m15, [Q5]
%define rq4 m14
%define rq5 m15
%else
%define rq4 [Q4]
%define rq5 [Q5]
%endif
    ABSSUB_GT           m7, rq4, rq0, m6, m5            ; abs(q4 - q0) <= 1
    por                 m1, m7
    ABSSUB_GT           m7, rq5, rq0, m6, m5            ; abs(q5 - q0) <= 1
    por                 m1, m7
%ifdef m8
    mova                m14, [Q6]
    mova                m15, [Q7]
%define rq6 m14
%define rq7 m15
%else
%define rq6 [Q6]
%define rq7 [Q7]
%endif
    ABSSUB_GT           m7, rq6, rq0, m6, m5            ; abs(q4 - q0) <= 1
    por                 m1, m7
    ABSSUB_GT           m7, rq7, rq0, m6, m5            ; abs(q5 - q0) <= 1
    por                 m1, m7                          ; flat8out final value
    pxor                m1, [pb_ff]
%endif

    ; if (fm) {
    ;     if (out && in) filter_14()
    ;     else if (in)   filter_6()
    ;     else if (hev)  filter_2()
    ;     else           filter_4()
    ; }
    ;
    ; f14:                                                                            fm &  out &  in
    ; f6:  fm & ~f14 & in        => fm & ~(out & in) & in                          => fm & ~out &  in
    ; f2:  fm & ~f14 & ~f6 & hev => fm & ~(out & in) & ~(~out & in) & hev          => fm &  ~in &  hev
    ; f4:  fm & ~f14 & ~f6 & ~f2 => fm & ~(out & in) & ~(~out & in) & ~(~in & hev) => fm &  ~in & ~hev

    ; (m0: hev, [m1: flat8out], [m2: flat8in], m3: fm, m8..15: p5 p4 p1 p0 q0 q1 q6 q7)
    ; filter2()
%if %2 != 44 && %2 != 4
    mova                m6, [pb_80]                     ; already in m6 if 44_16
    SCRATCH              2, 15, rsp+%3+%4
%if %2 == 16
    SCRATCH              1,  8, rsp+%3+%4+16
%endif
%endif
    pxor                m2, m6, rq0                     ; q0 ^ 0x80
    pxor                m4, m6, rp0                     ; p0 ^ 0x80
    psubsb              m2, m4                          ; (signed) q0 - p0
    pxor                m4, m6, rp1                     ; p1 ^ 0x80
    pxor                m5, m6, rq1                     ; q1 ^ 0x80
    psubsb              m4, m5                          ; (signed) p1 - q1
    paddsb              m4, m2                          ;   (q0 - p0) + (p1 - q1)
    paddsb              m4, m2                          ; 2*(q0 - p0) + (p1 - q1)
    paddsb              m4, m2                          ; 3*(q0 - p0) + (p1 - q1)
    paddsb              m6, m4, [pb_4]                  ; m6: f1 = clip(f + 4, 127)
    paddsb              m4, [pb_3]                      ; m4: f2 = clip(f + 3, 127)
%ifdef m8
    mova                m14, [pb_10]                    ; will be reused in filter4()
%define rb10 m14
%else
%define rb10 [pb_10]
%endif
    SRSHIFT3B_2X        m6, m4, rb10, m7                ; f1 and f2 sign byte shift by 3
    SIGN_SUB            m7, rq0, m6, m5                 ; m7 = q0 - f1
    SIGN_ADD            m1, rp0, m4, m5                 ; m1 = p0 + f2
%if %2 != 44 && %2 != 4
%ifdef m8
    pandn               m6, m15, m3                     ;  ~mask(in) & mask(fm)
%else
    mova                m6, [rsp+%3+%4]
    pandn               m6, m3
%endif
    pand                m6, m0                          ; (~mask(in) & mask(fm)) & mask(hev)
%else
    pand                m6, m3, m0
%endif
    MASK_APPLY          m7, rq0, m6, m5                 ; m7 = filter2(q0) & mask / we write it in filter4()
    MASK_APPLY          m1, rp0, m6, m5                 ; m1 = filter2(p0) & mask / we write it in filter4()

    ; (m0: hev, m1: p0', m2: q0-p0, m3: fm, m7: q0', [m8: flat8out], m10..13: p1 p0 q0 q1, m14: pb_10, [m15: flat8in], )
    ; filter4()
    mova                m4, m2
    paddsb              m2, m4                          ; 2 * (q0 - p0)
    paddsb              m2, m4                          ; 3 * (q0 - p0)
    paddsb              m6, m2, [pb_4]                  ; m6:  f1 = clip(f + 4, 127)
    paddsb              m2, [pb_3]                      ; m2: f2 = clip(f + 3, 127)
    SRSHIFT3B_2X        m6, m2, rb10, m4                ; f1 and f2 sign byte shift by 3
%if %2 != 44 && %2 != 4
%ifdef m8
    pandn               m5, m15, m3                     ;               ~mask(in) & mask(fm)
%else
    mova                m5, [rsp+%3+%4]
    pandn               m5, m3
%endif
    pandn               m0, m5                          ; ~mask(hev) & (~mask(in) & mask(fm))
%else
    pandn               m0, m3
%endif
    SIGN_SUB            m5, rq0, m6, m4                 ; q0 - f1
    MASK_APPLY          m5, m7, m0, m4                  ; filter4(q0) & mask
    mova                [Q0], m5
    SIGN_ADD            m7, rp0, m2, m4                 ; p0 + f2
    MASK_APPLY          m7, m1, m0, m4                  ; filter4(p0) & mask
    mova                [P0], m7
    paddb               m6, [pb_80]                     ;
    pxor                m1, m1                          ;   f=(f1+1)>>1
    pavgb               m6, m1                          ;
    psubb               m6, [pb_40]                     ;
    SIGN_ADD            m1, rp1, m6, m2                 ; p1 + f
    SIGN_SUB            m4, rq1, m6, m2                 ; q1 - f
    MASK_APPLY          m1, rp1, m0, m2                 ; m1 = filter4(p1)
    MASK_APPLY          m4, rq1, m0, m2                 ; m4 = filter4(q1)
    mova                [P1], m1
    mova                [Q1], m4

%if %2 != 44 && %2 != 4
    UNSCRATCH            2, 15, rsp+%3+%4
%endif

    ; ([m1: flat8out], m2: flat8in, m3: fm, m10..13: p1 p0 q0 q1)
    ; filter6()
%if %2 != 44 && %2 != 4
    pxor                m0, m0
%if %2 != 16
    pand                m3, m2
%else
    pand                m2, m3                          ;               mask(fm) & mask(in)
%ifdef m8
    pandn               m3, m8, m2                      ; ~mask(out) & (mask(fm) & mask(in))
%else
    mova                m3, [rsp+%3+%4+16]
    pandn               m3, m2
%endif
%endif
%ifdef m8
    mova               m14, [P3]
    mova                m9, [Q3]
%define rp3 m14
%define rq3 m9
%else
%define rp3 [P3]
%define rq3 [Q3]
%endif
    mova                m1, [P2]
    FILTER_INIT         m4, m5, m6, m7, [P2], %4, 6,             m3,  m1             ; [p2]
    mova                m1, [Q2]
    FILTER_UPDATE       m4, m5, m6, m7, [P1], %4, 0, 1, 2, 5, 3, m3,  "", rq1, "", 1 ; [p1] -p3 -p2 +p1 +q1
    FILTER_UPDATE       m4, m5, m6, m7, [P0], %4, 0, 2, 3, 6, 3, m3,  "", m1         ; [p0] -p3 -p1 +p0 +q2
    FILTER_UPDATE       m4, m5, m6, m7, [Q0], %4, 0, 3, 4, 7, 3, m3,  "", rq3, "", 1 ; [q0] -p3 -p0 +q0 +q3
    FILTER_UPDATE       m4, m5, m6, m7, [Q1], %4, 1, 4, 5, 7, 3, m3,  ""             ; [q1] -p2 -q0 +q1 +q3
    FILTER_UPDATE       m4, m5, m6, m7, [Q2], %4, 2, 5, 6, 7, 3, m3,  m1             ; [q2] -p1 -q1 +q2 +q3
%endif

%if %2 == 16
    UNSCRATCH            1,  8, rsp+%3+%4+16
%endif

    ; (m0: 0, [m1: flat8out], m2: fm & flat8in, m8..15: q2 q3 p1 p0 q0 q1 p3 p2)
    ; filter14()
    ;
    ;                            m2  m3  m8  m9 m14 m15 m10 m11 m12 m13
    ;
    ;                                    q2  q3  p3  p2  p1  p0  q0  q1
    ; p6  -7                     p7  p6  p5  p4   .   .   .   .   .
    ; p5  -6  -p7 -p6 +p5 +q1     .   .   .                           .
    ; p4  -5  -p7 -p5 +p4 +q2     .       .   .                      q2
    ; p3  -4  -p7 -p4 +p3 +q3     .           .   .                  q3
    ; p2  -3  -p7 -p3 +p2 +q4     .               .   .              q4
    ; p1  -2  -p7 -p2 +p1 +q5     .                   .   .          q5
    ; p0  -1  -p7 -p1 +p0 +q6     .                       .   .      q6
    ; q0  +0  -p7 -p0 +q0 +q7     .                           .   .  q7
    ; q1  +1  -p6 -q0 +q1 +q7    q1   .                           .   .
    ; q2  +2  -p5 -q1 +q2 +q7     .  q2   .                           .
    ; q3  +3  -p4 -q2 +q3 +q7         .  q3   .                       .
    ; q4  +4  -p3 -q3 +q4 +q7             .  q4   .                   .
    ; q5  +5  -p2 -q4 +q5 +q7                 .  q5   .               .
    ; q6  +6  -p1 -q5 +q6 +q7                     .  q6   .           .

%if %2 == 16
    pand            m1, m2                                                              ; mask(out) & (mask(fm) & mask(in))
    mova            m2, [P7]
    mova            m3, [P6]
%ifdef m8
    mova            m8, [P5]
    mova            m9, [P4]
%define rp5 m8
%define rp4 m9
%define rp5s m8
%define rp4s m9
%define rp3s m14
%define rq4 m8
%define rq5 m9
%define rq6 m14
%define rq7 m15
%define rq4s m8
%define rq5s m9
%define rq6s m14
%else
%define rp5 [P5]
%define rp4 [P4]
%define rp5s ""
%define rp4s ""
%define rp3s ""
%define rq4 [Q4]
%define rq5 [Q5]
%define rq6 [Q6]
%define rq7 [Q7]
%define rq4s ""
%define rq5s ""
%define rq6s ""
%endif
    FILTER_INIT     m4, m5, m6, m7, [P6], %4, 14,                m1,  m3            ; [p6]
    FILTER_UPDATE   m4, m5, m6, m7, [P5], %4,  8,  9, 10,  5, 4, m1, rp5s           ; [p5] -p7 -p6 +p5 +q1
    FILTER_UPDATE   m4, m5, m6, m7, [P4], %4,  8, 10, 11,  6, 4, m1, rp4s           ; [p4] -p7 -p5 +p4 +q2
    FILTER_UPDATE   m4, m5, m6, m7, [P3], %4,  8, 11,  0,  7, 4, m1, rp3s           ; [p3] -p7 -p4 +p3 +q3
    FILTER_UPDATE   m4, m5, m6, m7, [P2], %4,  8,  0,  1, 12, 4, m1,  "", rq4, [Q4], 1 ; [p2] -p7 -p3 +p2 +q4
    FILTER_UPDATE   m4, m5, m6, m7, [P1], %4,  8,  1,  2, 13, 4, m1,  "", rq5, [Q5], 1 ; [p1] -p7 -p2 +p1 +q5
    FILTER_UPDATE   m4, m5, m6, m7, [P0], %4,  8,  2,  3, 14, 4, m1,  "", rq6, [Q6], 1 ; [p0] -p7 -p1 +p0 +q6
    FILTER_UPDATE   m4, m5, m6, m7, [Q0], %4,  8,  3,  4, 15, 4, m1,  "", rq7, [Q7], 1 ; [q0] -p7 -p0 +q0 +q7
    FILTER_UPDATE   m4, m5, m6, m7, [Q1], %4,  9,  4,  5, 15, 4, m1,  ""            ; [q1] -p6 -q0 +q1 +q7
    FILTER_UPDATE   m4, m5, m6, m7, [Q2], %4, 10,  5,  6, 15, 4, m1,  ""            ; [q2] -p5 -q1 +q2 +q7
    FILTER_UPDATE   m4, m5, m6, m7, [Q3], %4, 11,  6,  7, 15, 4, m1,  ""            ; [q3] -p4 -q2 +q3 +q7
    FILTER_UPDATE   m4, m5, m6, m7, [Q4], %4,  0,  7, 12, 15, 4, m1, rq4s           ; [q4] -p3 -q3 +q4 +q7
    FILTER_UPDATE   m4, m5, m6, m7, [Q5], %4,  1, 12, 13, 15, 4, m1, rq5s           ; [q5] -p2 -q4 +q5 +q7
    FILTER_UPDATE   m4, m5, m6, m7, [Q6], %4,  2, 13, 14, 15, 4, m1, rq6s           ; [q6] -p1 -q5 +q6 +q7
%endif

%ifidn %1, h
%if %2 == 16
    mova                    m0, [P7]
    mova                    m1, [P6]
    mova                    m2, [P5]
    mova                    m3, [P4]
    mova                    m4, [P3]
    mova                    m5, [P2]
%if ARCH_X86_64
    mova                    m6, [P1]
%endif
    mova                    m7, [P0]
%if ARCH_X86_64
    mova                    m8, [Q0]
    mova                    m9, [Q1]
    mova                   m10, [Q2]
    mova                   m11, [Q3]
    mova                   m12, [Q4]
    mova                   m13, [Q5]
    mova                   m14, [Q6]
    mova                   m15, [Q7]
    TRANSPOSE16x16B 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, [rsp]
    DEFINE_REAL_P7_TO_Q7
    movu  [P7],  m0
    movu  [P6],  m1
    movu  [P5],  m2
    movu  [P4],  m3
    movu  [P3],  m4
    movu  [P2],  m5
    movu  [P1],  m6
    movu  [P0],  m7
    movu  [Q0],  m8
    movu  [Q1],  m9
    movu  [Q2], m10
    movu  [Q3], m11
    movu  [Q4], m12
    movu  [Q5], m13
    movu  [Q6], m14
    movu  [Q7], m15
%else
    DEFINE_REAL_P7_TO_Q7
    TRANSPOSE8x8B 0, 1, 2, 3, 4, 5, 6, 7, [rsp+32], a, [rsp+%3+%4], [Q0], [Q1]
    movh   [P7],  m0
    movh   [P5],  m1
    movh   [P3],  m2
    movh   [P1],  m3
    movh   [Q2],  m5
    movh   [Q4],  m6
    movh   [Q6],  m7
    movhps [P6],  m0
    movhps [P4],  m1
    movhps [P2],  m2
    movhps [P0],  m3
    movhps [Q3],  m5
    movhps [Q5],  m6
    movhps [Q7],  m7
    DEFINE_TRANSPOSED_P7_TO_Q7
    mova                    m0, [Q0]
    mova                    m1, [Q1]
    mova                    m2, [Q2]
    mova                    m3, [Q3]
    mova                    m4, [Q4]
    mova                    m5, [Q5]
    mova                    m7, [Q7]
    DEFINE_REAL_P7_TO_Q7 8
    TRANSPOSE8x8B 0, 1, 2, 3, 4, 5, 6, 7, [rsp+224], a, [rsp+%3+%4], [Q0], [Q1]
    movh   [P7],  m0
    movh   [P5],  m1
    movh   [P3],  m2
    movh   [P1],  m3
    movh   [Q2],  m5
    movh   [Q4],  m6
    movh   [Q6],  m7
    movhps [P6],  m0
    movhps [P4],  m1
    movhps [P2],  m2
    movhps [P0],  m3
    movhps [Q3],  m5
    movhps [Q5],  m6
    movhps [Q7],  m7
%endif
%elif %2 == 44 || %2 == 4
    SWAP 0, 1   ; m0 = p1
    SWAP 1, 7   ; m1 = p0
    SWAP 2, 5   ; m2 = q0
    SWAP 3, 4   ; m3 = q1
    DEFINE_REAL_P7_TO_Q7 2
    SBUTTERFLY  bw, 0, 1, 4
    SBUTTERFLY  bw, 2, 3, 4
    SBUTTERFLY  wd, 0, 2, 4
    SBUTTERFLY  wd, 1, 3, 4
%if mmsize == 16
    movd  [P7], m0
    movd  [P3], m2
    movd  [Q0], m1
    movd  [Q4], m3
    psrldq  m0, 4
    psrldq  m1, 4
    psrldq  m2, 4
    psrldq  m3, 4
    movd  [P6], m0
    movd  [P2], m2
    movd  [Q1], m1
    movd  [Q5], m3
    psrldq  m0, 4
    psrldq  m1, 4
    psrldq  m2, 4
    psrldq  m3, 4
    movd  [P5], m0
    movd  [P1], m2
    movd  [Q2], m1
    movd  [Q6], m3
    psrldq  m0, 4
    psrldq  m1, 4
    psrldq  m2, 4
    psrldq  m3, 4
    movd  [P4], m0
    movd  [P0], m2
    movd  [Q3], m1
    movd  [Q7], m3
%else
    movd  [P7], m0
    movd  [P5], m2
    movd  [P3], m1
    movd  [P1], m3
    psrlq   m0, 32
    psrlq   m2, 32
    psrlq   m1, 32
    psrlq   m3, 32
    movd  [P6], m0
    movd  [P4], m2
    movd  [P2], m1
    movd  [P0], m3
%endif
%else
    ; the following code do a transpose of 8 full lines to 16 half
    ; lines (high part). It is inlined to avoid the need of a staging area
    mova                    m0, [P3]
    mova                    m1, [P2]
    mova                    m2, [P1]
    mova                    m3, [P0]
    mova                    m4, [Q0]
    mova                    m5, [Q1]
%ifdef m8
    mova                    m6, [Q2]
%endif
    mova                    m7, [Q3]
    DEFINE_REAL_P7_TO_Q7
%ifdef m8
    SBUTTERFLY  bw,  0,  1, 8
    SBUTTERFLY  bw,  2,  3, 8
    SBUTTERFLY  bw,  4,  5, 8
    SBUTTERFLY  bw,  6,  7, 8
    SBUTTERFLY  wd,  0,  2, 8
    SBUTTERFLY  wd,  1,  3, 8
    SBUTTERFLY  wd,  4,  6, 8
    SBUTTERFLY  wd,  5,  7, 8
    SBUTTERFLY  dq,  0,  4, 8
    SBUTTERFLY  dq,  1,  5, 8
    SBUTTERFLY  dq,  2,  6, 8
    SBUTTERFLY  dq,  3,  7, 8
%else
    SBUTTERFLY  bw,  0,  1, 6
    mova [rsp+mmsize*4], m1
    mova        m6, [rsp+mmsize*6]
    SBUTTERFLY  bw,  2,  3, 1
    SBUTTERFLY  bw,  4,  5, 1
    SBUTTERFLY  bw,  6,  7, 1
    SBUTTERFLY  wd,  0,  2, 1
    mova [rsp+mmsize*6], m2
    mova        m1, [rsp+mmsize*4]
    SBUTTERFLY  wd,  1,  3, 2
    SBUTTERFLY  wd,  4,  6, 2
    SBUTTERFLY  wd,  5,  7, 2
    SBUTTERFLY  dq,  0,  4, 2
    SBUTTERFLY  dq,  1,  5, 2
%if mmsize == 16
    movh      [Q0], m1
    movhps    [Q1], m1
%else
    mova      [P3], m1
%endif
    mova        m2, [rsp+mmsize*6]
    SBUTTERFLY  dq,  2,  6, 1
    SBUTTERFLY  dq,  3,  7, 1
%endif
    SWAP         3, 6
    SWAP         1, 4
%if mmsize == 16
    movh      [P7], m0
    movhps    [P6], m0
    movh      [P5], m1
    movhps    [P4], m1
    movh      [P3], m2
    movhps    [P2], m2
    movh      [P1], m3
    movhps    [P0], m3
%ifdef m8
    movh      [Q0], m4
    movhps    [Q1], m4
%endif
    movh      [Q2], m5
    movhps    [Q3], m5
    movh      [Q4], m6
    movhps    [Q5], m6
    movh      [Q6], m7
    movhps    [Q7], m7
%else
    mova      [P7], m0
    mova      [P6], m1
    mova      [P5], m2
    mova      [P4], m3
    mova      [P2], m5
    mova      [P1], m6
    mova      [P0], m7
%endif
%endif
%endif

    RET
%endmacro

%macro LPF_16_VH 5
INIT_XMM %5
LOOPFILTER v, %1, %2,  0, %4
LOOPFILTER h, %1, %2, %3, %4
%endmacro

%macro LPF_16_VH_ALL_OPTS 4
LPF_16_VH %1, %2, %3, %4, sse2
LPF_16_VH %1, %2, %3, %4, ssse3
LPF_16_VH %1, %2, %3, %4, avx
%endmacro

LPF_16_VH_ALL_OPTS 16, 512, 256, 32
LPF_16_VH_ALL_OPTS 44,   0, 128,  0
LPF_16_VH_ALL_OPTS 48, 256, 128, 16
LPF_16_VH_ALL_OPTS 84, 256, 128, 16
LPF_16_VH_ALL_OPTS 88, 256, 128, 16

INIT_MMX mmxext
LOOPFILTER v, 4,   0,  0, 0
LOOPFILTER h, 4,   0, 64, 0
LOOPFILTER v, 8, 128,  0, 8
LOOPFILTER h, 8, 128, 64, 8