/*
* Copyright (c) 2010 Mans Rullgard <mans@mansr.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/arm/asm.S"
.macro vp6_edge_filter
vdup.16 q3, r2 @ t
vmov.i16 q13, #1
vsubl.u8 q0, d20, d18 @ p[ 0] - p[-s]
vsubl.u8 q1, d16, d22 @ p[-2*s] - p[ s]
vsubl.u8 q14, d21, d19
vsubl.u8 q15, d17, d23
vadd.i16 q2, q0, q0 @ 2*(p[0]-p[-s])
vadd.i16 d29, d28, d28
vadd.i16 q0, q0, q1 @ p[0]-p[-s] + p[-2*s]-p[s]
vadd.i16 d28, d28, d30
vadd.i16 q0, q0, q2 @ 3*(p[0]-p[-s]) + p[-2*s]-p[s]
vadd.i16 d28, d28, d29
vrshr.s16 q0, q0, #3 @ v
vrshr.s16 d28, d28, #3
vsub.i16 q8, q3, q13 @ t-1
vabs.s16 q1, q0 @ V
vshr.s16 q2, q0, #15 @ s
vabs.s16 d30, d28
vshr.s16 d29, d28, #15
vsub.i16 q12, q1, q3 @ V-t
vsub.i16 d31, d30, d6
vsub.i16 q12, q12, q13 @ V-t-1
vsub.i16 d31, d31, d26
vcge.u16 q12, q12, q8 @ V-t-1 >= t-1
vcge.u16 d31, d31, d16
vadd.i16 q13, q3, q3 @ 2*t
vadd.i16 d16, d6, d6
vsub.i16 q13, q13, q1 @ 2*t - V
vsub.i16 d16, d16, d30
vadd.i16 q13, q13, q2 @ += s
vadd.i16 d16, d16, d29
veor q13, q13, q2 @ ^= s
veor d16, d16, d29
vbif q0, q13, q12
vbif d28, d16, d31
vmovl.u8 q1, d20
vmovl.u8 q15, d21
vaddw.u8 q2, q0, d18
vaddw.u8 q3, q14, d19
vsub.i16 q1, q1, q0
vsub.i16 d30, d30, d28
vqmovun.s16 d18, q2
vqmovun.s16 d19, q3
vqmovun.s16 d20, q1
vqmovun.s16 d21, q15
.endm
function ff_vp6_edge_filter_ver_neon, export=1
sub r0, r0, r1, lsl #1
vld1.8 {q8}, [r0], r1 @ p[-2*s]
vld1.8 {q9}, [r0], r1 @ p[-s]
vld1.8 {q10}, [r0], r1 @ p[0]
vld1.8 {q11}, [r0] @ p[s]
vp6_edge_filter
sub r0, r0, r1, lsl #1
sub r1, r1, #8
vst1.8 {d18}, [r0]!
vst1.32 {d19[0]}, [r0], r1
vst1.8 {d20}, [r0]!
vst1.32 {d21[0]}, [r0]
bx lr
endfunc
function ff_vp6_edge_filter_hor_neon, export=1
sub r3, r0, #1
sub r0, r0, #2
vld1.32 {d16[0]}, [r0], r1
vld1.32 {d18[0]}, [r0], r1
vld1.32 {d20[0]}, [r0], r1
vld1.32 {d22[0]}, [r0], r1
vld1.32 {d16[1]}, [r0], r1
vld1.32 {d18[1]}, [r0], r1
vld1.32 {d20[1]}, [r0], r1
vld1.32 {d22[1]}, [r0], r1
vld1.32 {d17[0]}, [r0], r1
vld1.32 {d19[0]}, [r0], r1
vld1.32 {d21[0]}, [r0], r1
vld1.32 {d23[0]}, [r0], r1
vtrn.8 q8, q9
vtrn.8 q10, q11
vtrn.16 q8, q10
vtrn.16 q9, q11
vp6_edge_filter
vtrn.8 q9, q10
vst1.16 {d18[0]}, [r3], r1
vst1.16 {d20[0]}, [r3], r1
vst1.16 {d18[1]}, [r3], r1
vst1.16 {d20[1]}, [r3], r1
vst1.16 {d18[2]}, [r3], r1
vst1.16 {d20[2]}, [r3], r1
vst1.16 {d18[3]}, [r3], r1
vst1.16 {d20[3]}, [r3], r1
vst1.16 {d19[0]}, [r3], r1
vst1.16 {d21[0]}, [r3], r1
vst1.16 {d19[1]}, [r3], r1
vst1.16 {d21[1]}, [r3], r1
bx lr
endfunc