;******************************************************************************
;* VP9 MC SIMD optimizations
;*
;* Copyright (c) 2013 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 32

cextern pw_256

%macro F8_TAPS 8
times 16 db %1, %2
times 16 db %3, %4
times 16 db %5, %6
times 16 db %7, %8
%endmacro
; int8_t ff_filters_ssse3[3][15][4][32]
const filters_ssse3 ; smooth
                    F8_TAPS -3, -1,  32,  64,  38,   1, -3,  0
                    F8_TAPS -2, -2,  29,  63,  41,   2, -3,  0
                    F8_TAPS -2, -2,  26,  63,  43,   4, -4,  0
                    F8_TAPS -2, -3,  24,  62,  46,   5, -4,  0
                    F8_TAPS -2, -3,  21,  60,  49,   7, -4,  0
                    F8_TAPS -1, -4,  18,  59,  51,   9, -4,  0
                    F8_TAPS -1, -4,  16,  57,  53,  12, -4, -1
                    F8_TAPS -1, -4,  14,  55,  55,  14, -4, -1
                    F8_TAPS -1, -4,  12,  53,  57,  16, -4, -1
                    F8_TAPS  0, -4,   9,  51,  59,  18, -4, -1
                    F8_TAPS  0, -4,   7,  49,  60,  21, -3, -2
                    F8_TAPS  0, -4,   5,  46,  62,  24, -3, -2
                    F8_TAPS  0, -4,   4,  43,  63,  26, -2, -2
                    F8_TAPS  0, -3,   2,  41,  63,  29, -2, -2
                    F8_TAPS  0, -3,   1,  38,  64,  32, -1, -3
                    ; regular
                    F8_TAPS  0,  1,  -5, 126,   8,  -3,  1,  0
                    F8_TAPS -1,  3, -10, 122,  18,  -6,  2,  0
                    F8_TAPS -1,  4, -13, 118,  27,  -9,  3, -1
                    F8_TAPS -1,  4, -16, 112,  37, -11,  4, -1
                    F8_TAPS -1,  5, -18, 105,  48, -14,  4, -1
                    F8_TAPS -1,  5, -19,  97,  58, -16,  5, -1
                    F8_TAPS -1,  6, -19,  88,  68, -18,  5, -1
                    F8_TAPS -1,  6, -19,  78,  78, -19,  6, -1
                    F8_TAPS -1,  5, -18,  68,  88, -19,  6, -1
                    F8_TAPS -1,  5, -16,  58,  97, -19,  5, -1
                    F8_TAPS -1,  4, -14,  48, 105, -18,  5, -1
                    F8_TAPS -1,  4, -11,  37, 112, -16,  4, -1
                    F8_TAPS -1,  3,  -9,  27, 118, -13,  4, -1
                    F8_TAPS  0,  2,  -6,  18, 122, -10,  3, -1
                    F8_TAPS  0,  1,  -3,   8, 126,  -5,  1,  0
                    ; sharp
                    F8_TAPS -1,  3,  -7, 127,   8,  -3,  1,  0
                    F8_TAPS -2,  5, -13, 125,  17,  -6,  3, -1
                    F8_TAPS -3,  7, -17, 121,  27, -10,  5, -2
                    F8_TAPS -4,  9, -20, 115,  37, -13,  6, -2
                    F8_TAPS -4, 10, -23, 108,  48, -16,  8, -3
                    F8_TAPS -4, 10, -24, 100,  59, -19,  9, -3
                    F8_TAPS -4, 11, -24,  90,  70, -21, 10, -4
                    F8_TAPS -4, 11, -23,  80,  80, -23, 11, -4
                    F8_TAPS -4, 10, -21,  70,  90, -24, 11, -4
                    F8_TAPS -3,  9, -19,  59, 100, -24, 10, -4
                    F8_TAPS -3,  8, -16,  48, 108, -23, 10, -4
                    F8_TAPS -2,  6, -13,  37, 115, -20,  9, -4
                    F8_TAPS -2,  5, -10,  27, 121, -17,  7, -3
                    F8_TAPS -1,  3,  -6,  17, 125, -13,  5, -2
                    F8_TAPS  0,  1,  -3,   8, 127,  -7,  3, -1

SECTION .text

%macro filter_h_fn 1
%assign %%px mmsize/2
cglobal vp9_%1_8tap_1d_h_ %+ %%px, 6, 6, 11, dst, dstride, src, sstride, h, filtery
    mova        m6, [pw_256]
    mova        m7, [filteryq+ 0]
%if ARCH_X86_64 && mmsize > 8
    mova        m8, [filteryq+32]
    mova        m9, [filteryq+64]
    mova       m10, [filteryq+96]
%endif
.loop:
    movh        m0, [srcq-3]
    movh        m1, [srcq-2]
    movh        m2, [srcq-1]
    movh        m3, [srcq+0]
    movh        m4, [srcq+1]
    movh        m5, [srcq+2]
    punpcklbw   m0, m1
    punpcklbw   m2, m3
    movh        m1, [srcq+3]
    movh        m3, [srcq+4]
    add       srcq, sstrideq
    punpcklbw   m4, m5
    punpcklbw   m1, m3
    pmaddubsw   m0, m7
%if ARCH_X86_64 && mmsize > 8
    pmaddubsw   m2, m8
    pmaddubsw   m4, m9
    pmaddubsw   m1, m10
%else
    pmaddubsw   m2, [filteryq+32]
    pmaddubsw   m4, [filteryq+64]
    pmaddubsw   m1, [filteryq+96]
%endif
    paddw       m0, m2
    paddw       m4, m1
    paddsw      m0, m4
    pmulhrsw    m0, m6
%ifidn %1, avg
    movh        m1, [dstq]
%endif
    packuswb    m0, m0
%ifidn %1, avg
    pavgb       m0, m1
%endif
    movh    [dstq], m0
    add       dstq, dstrideq
    dec         hd
    jg .loop
    RET
%endmacro

INIT_MMX ssse3
filter_h_fn put
filter_h_fn avg

INIT_XMM ssse3
filter_h_fn put
filter_h_fn avg

%if ARCH_X86_64
%macro filter_hx2_fn 1
%assign %%px mmsize
cglobal vp9_%1_8tap_1d_h_ %+ %%px, 6, 6, 14, dst, dstride, src, sstride, h, filtery
    mova       m13, [pw_256]
    mova        m8, [filteryq+ 0]
    mova        m9, [filteryq+32]
    mova       m10, [filteryq+64]
    mova       m11, [filteryq+96]
.loop:
    movu        m0, [srcq-3]
    movu        m1, [srcq-2]
    movu        m2, [srcq-1]
    movu        m3, [srcq+0]
    movu        m4, [srcq+1]
    movu        m5, [srcq+2]
    movu        m6, [srcq+3]
    movu        m7, [srcq+4]
    add       srcq, sstrideq
    SBUTTERFLY  bw, 0, 1, 12
    SBUTTERFLY  bw, 2, 3, 12
    SBUTTERFLY  bw, 4, 5, 12
    SBUTTERFLY  bw, 6, 7, 12
    pmaddubsw   m0, m8
    pmaddubsw   m1, m8
    pmaddubsw   m2, m9
    pmaddubsw   m3, m9
    pmaddubsw   m4, m10
    pmaddubsw   m5, m10
    pmaddubsw   m6, m11
    pmaddubsw   m7, m11
    paddw       m0, m2
    paddw       m1, m3
    paddw       m4, m6
    paddw       m5, m7
    paddsw      m0, m4
    paddsw      m1, m5
    pmulhrsw    m0, m13
    pmulhrsw    m1, m13
    packuswb    m0, m1
%ifidn %1, avg
    pavgb       m0, [dstq]
%endif
    mova    [dstq], m0
    add       dstq, dstrideq
    dec         hd
    jg .loop
    RET
%endmacro

INIT_XMM ssse3
filter_hx2_fn put
filter_hx2_fn avg

%if HAVE_AVX2_EXTERNAL
INIT_YMM avx2
filter_hx2_fn put
filter_hx2_fn avg
%endif

%endif ; ARCH_X86_64

%macro filter_v_fn 1
%assign %%px mmsize/2
%if ARCH_X86_64
cglobal vp9_%1_8tap_1d_v_ %+ %%px, 6, 8, 11, dst, dstride, src, sstride, h, filtery, src4, sstride3
%else
cglobal vp9_%1_8tap_1d_v_ %+ %%px, 4, 7, 11, dst, dstride, src, sstride, filtery, src4, sstride3
    mov   filteryq, r5mp
%define hd r4mp
%endif
    mova        m6, [pw_256]
    lea  sstride3q, [sstrideq*3]
    lea      src4q, [srcq+sstrideq]
    sub       srcq, sstride3q
    mova        m7, [filteryq+ 0]
%if ARCH_X86_64 && mmsize > 8
    mova        m8, [filteryq+32]
    mova        m9, [filteryq+64]
    mova       m10, [filteryq+96]
%endif
.loop:
    ; FIXME maybe reuse loads from previous rows, or just
    ; more generally unroll this to prevent multiple loads of
    ; the same data?
    movh        m0, [srcq]
    movh        m1, [srcq+sstrideq]
    movh        m2, [srcq+sstrideq*2]
    movh        m3, [srcq+sstride3q]
    movh        m4, [src4q]
    movh        m5, [src4q+sstrideq]
    punpcklbw   m0, m1
    punpcklbw   m2, m3
    movh        m1, [src4q+sstrideq*2]
    movh        m3, [src4q+sstride3q]
    add       srcq, sstrideq
    add      src4q, sstrideq
    punpcklbw   m4, m5
    punpcklbw   m1, m3
    pmaddubsw   m0, m7
%if ARCH_X86_64 && mmsize > 8
    pmaddubsw   m2, m8
    pmaddubsw   m4, m9
    pmaddubsw   m1, m10
%else
    pmaddubsw   m2, [filteryq+32]
    pmaddubsw   m4, [filteryq+64]
    pmaddubsw   m1, [filteryq+96]
%endif
    paddw       m0, m2
    paddw       m4, m1
    paddsw      m0, m4
    pmulhrsw    m0, m6
%ifidn %1, avg
    movh        m1, [dstq]
%endif
    packuswb    m0, m0
%ifidn %1, avg
    pavgb       m0, m1
%endif
    movh    [dstq], m0
    add       dstq, dstrideq
    dec         hd
    jg .loop
    RET
%endmacro

INIT_MMX ssse3
filter_v_fn put
filter_v_fn avg

INIT_XMM ssse3
filter_v_fn put
filter_v_fn avg

%if ARCH_X86_64

%macro filter_vx2_fn 1
%assign %%px mmsize
cglobal vp9_%1_8tap_1d_v_ %+ %%px, 6, 8, 14, dst, dstride, src, sstride, h, filtery, src4, sstride3
    mova       m13, [pw_256]
    lea  sstride3q, [sstrideq*3]
    lea      src4q, [srcq+sstrideq]
    sub       srcq, sstride3q
    mova        m8, [filteryq+ 0]
    mova        m9, [filteryq+32]
    mova       m10, [filteryq+64]
    mova       m11, [filteryq+96]
.loop:
    ; FIXME maybe reuse loads from previous rows, or just
    ; more generally unroll this to prevent multiple loads of
    ; the same data?
    movu        m0, [srcq]
    movu        m1, [srcq+sstrideq]
    movu        m2, [srcq+sstrideq*2]
    movu        m3, [srcq+sstride3q]
    movu        m4, [src4q]
    movu        m5, [src4q+sstrideq]
    movu        m6, [src4q+sstrideq*2]
    movu        m7, [src4q+sstride3q]
    add       srcq, sstrideq
    add      src4q, sstrideq
    SBUTTERFLY  bw, 0, 1, 12
    SBUTTERFLY  bw, 2, 3, 12
    SBUTTERFLY  bw, 4, 5, 12
    SBUTTERFLY  bw, 6, 7, 12
    pmaddubsw   m0, m8
    pmaddubsw   m1, m8
    pmaddubsw   m2, m9
    pmaddubsw   m3, m9
    pmaddubsw   m4, m10
    pmaddubsw   m5, m10
    pmaddubsw   m6, m11
    pmaddubsw   m7, m11
    paddw       m0, m2
    paddw       m1, m3
    paddw       m4, m6
    paddw       m5, m7
    paddsw      m0, m4
    paddsw      m1, m5
    pmulhrsw    m0, m13
    pmulhrsw    m1, m13
    packuswb    m0, m1
%ifidn %1, avg
    pavgb       m0, [dstq]
%endif
    mova    [dstq], m0
    add       dstq, dstrideq
    dec         hd
    jg .loop
    RET
%endmacro

INIT_XMM ssse3
filter_vx2_fn put
filter_vx2_fn avg

%if HAVE_AVX2_EXTERNAL
INIT_YMM avx2
filter_vx2_fn put
filter_vx2_fn avg
%endif

%endif ; ARCH_X86_64

%macro fpel_fn 6
%if %2 == 4
%define %%srcfn movh
%define %%dstfn movh
%else
%define %%srcfn movu
%define %%dstfn mova
%endif

%if %2 <= mmsize
cglobal vp9_%1%2, 5, 7, 4, dst, dstride, src, sstride, h, dstride3, sstride3
    lea  sstride3q, [sstrideq*3]
    lea  dstride3q, [dstrideq*3]
%else
cglobal vp9_%1%2, 5, 5, 4, dst, dstride, src, sstride, h
%endif
.loop:
    %%srcfn     m0, [srcq]
    %%srcfn     m1, [srcq+s%3]
    %%srcfn     m2, [srcq+s%4]
    %%srcfn     m3, [srcq+s%5]
    lea       srcq, [srcq+sstrideq*%6]
%ifidn %1, avg
    pavgb       m0, [dstq]
    pavgb       m1, [dstq+d%3]
    pavgb       m2, [dstq+d%4]
    pavgb       m3, [dstq+d%5]
%endif
    %%dstfn [dstq], m0
    %%dstfn [dstq+d%3], m1
    %%dstfn [dstq+d%4], m2
    %%dstfn [dstq+d%5], m3
    lea       dstq, [dstq+dstrideq*%6]
    sub         hd, %6
    jnz .loop
    RET
%endmacro

%define d16 16
%define s16 16
%define d32 32
%define s32 32
INIT_MMX mmx
fpel_fn put, 4,  strideq, strideq*2, stride3q, 4
fpel_fn put, 8,  strideq, strideq*2, stride3q, 4
INIT_MMX mmxext
fpel_fn avg, 4,  strideq, strideq*2, stride3q, 4
fpel_fn avg, 8,  strideq, strideq*2, stride3q, 4
INIT_XMM sse
fpel_fn put, 16, strideq, strideq*2, stride3q, 4
fpel_fn put, 32, mmsize,  strideq,   strideq+mmsize, 2
fpel_fn put, 64, mmsize,  mmsize*2,  mmsize*3, 1
INIT_XMM sse2
fpel_fn avg, 16, strideq, strideq*2, stride3q, 4
fpel_fn avg, 32, mmsize,  strideq,   strideq+mmsize, 2
fpel_fn avg, 64, mmsize,  mmsize*2,  mmsize*3, 1
INIT_YMM avx
fpel_fn put, 32, strideq, strideq*2, stride3q, 4
fpel_fn put, 64, mmsize,  strideq,   strideq+mmsize, 2
%if HAVE_AVX2_EXTERNAL
INIT_YMM avx2
fpel_fn avg, 32, strideq, strideq*2, stride3q, 4
fpel_fn avg, 64, mmsize,  strideq,   strideq+mmsize, 2
%endif
%undef s16
%undef d16
%undef s32
%undef d32