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/*
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* Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "asm.S"
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.macro vp6_edge_filter
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vdup.16 q3, r2 @ t
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vmov.i16 q13, #1
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vsubl.u8 q0, d20, d18 @ p[ 0] - p[-s]
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vsubl.u8 q1, d16, d22 @ p[-2*s] - p[ s]
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vsubl.u8 q14, d21, d19
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vsubl.u8 q15, d17, d23
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vadd.i16 q2, q0, q0 @ 2*(p[0]-p[-s])
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vadd.i16 d29, d28, d28
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vadd.i16 q0, q0, q1 @ p[0]-p[-s] + p[-2*s]-p[s]
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vadd.i16 d28, d28, d30
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vadd.i16 q0, q0, q2 @ 3*(p[0]-p[-s]) + p[-2*s]-p[s]
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vadd.i16 d28, d28, d29
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vrshr.s16 q0, q0, #3 @ v
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vrshr.s16 d28, d28, #3
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vsub.i16 q8, q3, q13 @ t-1
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vabs.s16 q1, q0 @ V
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vshr.s16 q2, q0, #15 @ s
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vabs.s16 d30, d28
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vshr.s16 d29, d28, #15
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vsub.i16 q12, q1, q3 @ V-t
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vsub.i16 d31, d30, d6
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vsub.i16 q12, q12, q13 @ V-t-1
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vsub.i16 d31, d31, d26
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vcge.u16 q12, q12, q8 @ V-t-1 >= t-1
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vcge.u16 d31, d31, d16
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vadd.i16 q13, q3, q3 @ 2*t
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vadd.i16 d16, d6, d6
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vsub.i16 q13, q13, q1 @ 2*t - V
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vsub.i16 d16, d16, d30
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vadd.i16 q13, q13, q2 @ += s
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vadd.i16 d16, d16, d29
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veor q13, q13, q2 @ ^= s
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veor d16, d16, d29
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vbif q0, q13, q12
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vbif d28, d16, d31
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vmovl.u8 q1, d20
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vmovl.u8 q15, d21
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vaddw.u8 q2, q0, d18
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vaddw.u8 q3, q14, d19
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vsub.i16 q1, q1, q0
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vsub.i16 d30, d30, d28
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vqmovun.s16 d18, q2
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vqmovun.s16 d19, q3
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vqmovun.s16 d20, q1
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vqmovun.s16 d21, q15
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.endm
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function ff_vp6_edge_filter_ver_neon, export=1
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sub r0, r0, r1, lsl #1
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vld1.8 {q8}, [r0], r1 @ p[-2*s]
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vld1.8 {q9}, [r0], r1 @ p[-s]
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vld1.8 {q10}, [r0], r1 @ p[0]
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vld1.8 {q11}, [r0] @ p[s]
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vp6_edge_filter
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sub r0, r0, r1, lsl #1
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sub r1, r1, #8
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vst1.8 {d18}, [r0]!
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vst1.32 {d19[0]}, [r0], r1
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vst1.8 {d20}, [r0]!
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vst1.32 {d21[0]}, [r0]
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bx lr
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endfunc
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function ff_vp6_edge_filter_hor_neon, export=1
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sub r3, r0, #1
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sub r0, r0, #2
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vld1.32 {d16[0]}, [r0], r1
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vld1.32 {d18[0]}, [r0], r1
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vld1.32 {d20[0]}, [r0], r1
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vld1.32 {d22[0]}, [r0], r1
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vld1.32 {d16[1]}, [r0], r1
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vld1.32 {d18[1]}, [r0], r1
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vld1.32 {d20[1]}, [r0], r1
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vld1.32 {d22[1]}, [r0], r1
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vld1.32 {d17[0]}, [r0], r1
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vld1.32 {d19[0]}, [r0], r1
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vld1.32 {d21[0]}, [r0], r1
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vld1.32 {d23[0]}, [r0], r1
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vtrn.8 q8, q9
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vtrn.8 q10, q11
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vtrn.16 q8, q10
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vtrn.16 q9, q11
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vp6_edge_filter
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vtrn.8 q9, q10
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vst1.16 {d18[0]}, [r3], r1
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vst1.16 {d20[0]}, [r3], r1
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vst1.16 {d18[1]}, [r3], r1
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vst1.16 {d20[1]}, [r3], r1
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vst1.16 {d18[2]}, [r3], r1
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vst1.16 {d20[2]}, [r3], r1
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vst1.16 {d18[3]}, [r3], r1
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vst1.16 {d20[3]}, [r3], r1
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vst1.16 {d19[0]}, [r3], r1
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vst1.16 {d21[0]}, [r3], r1
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vst1.16 {d19[1]}, [r3], r1
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vst1.16 {d21[1]}, [r3], r1
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bx lr
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endfunc
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