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/*
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* Copyright (c) 2017 Matthieu Bouron <matthieu.bouron gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "libavutil/aarch64/asm.S"
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function ff_resample_common_apply_filter_x4_float_neon, export=1
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movi v0.4s, #0 // accumulator
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1: ld1 {v1.4s}, [x1], #16 // src[0..3]
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ld1 {v2.4s}, [x2], #16 // filter[0..3]
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fmla v0.4s, v1.4s, v2.4s // accumulator += src[0..3] * filter[0..3]
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subs w3, w3, #4 // filter_length -= 4
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b.gt 1b // loop until filter_length
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faddp v0.4s, v0.4s, v0.4s // pair adding of the 4x32-bit accumulated values
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faddp v0.4s, v0.4s, v0.4s // pair adding of the 4x32-bit accumulated values
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st1 {v0.s}[0], [x0], #4 // write accumulator
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ret
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endfunc
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function ff_resample_common_apply_filter_x8_float_neon, export=1
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movi v0.4s, #0 // accumulator
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1: ld1 {v1.4s}, [x1], #16 // src[0..3]
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ld1 {v2.4s}, [x2], #16 // filter[0..3]
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ld1 {v3.4s}, [x1], #16 // src[4..7]
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ld1 {v4.4s}, [x2], #16 // filter[4..7]
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fmla v0.4s, v1.4s, v2.4s // accumulator += src[0..3] * filter[0..3]
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fmla v0.4s, v3.4s, v4.4s // accumulator += src[4..7] * filter[4..7]
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subs w3, w3, #8 // filter_length -= 8
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b.gt 1b // loop until filter_length
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faddp v0.4s, v0.4s, v0.4s // pair adding of the 4x32-bit accumulated values
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faddp v0.4s, v0.4s, v0.4s // pair adding of the 4x32-bit accumulated values
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st1 {v0.s}[0], [x0], #4 // write accumulator
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ret
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endfunc
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function ff_resample_common_apply_filter_x4_s16_neon, export=1
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movi v0.4s, #0 // accumulator
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1: ld1 {v1.4h}, [x1], #8 // src[0..3]
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ld1 {v2.4h}, [x2], #8 // filter[0..3]
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smlal v0.4s, v1.4h, v2.4h // accumulator += src[0..3] * filter[0..3]
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subs w3, w3, #4 // filter_length -= 4
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b.gt 1b // loop until filter_length
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addp v0.4s, v0.4s, v0.4s // pair adding of the 4x32-bit accumulated values
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addp v0.4s, v0.4s, v0.4s // pair adding of the 4x32-bit accumulated values
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st1 {v0.s}[0], [x0], #4 // write accumulator
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ret
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endfunc
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function ff_resample_common_apply_filter_x8_s16_neon, export=1
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movi v0.4s, #0 // accumulator
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1: ld1 {v1.8h}, [x1], #16 // src[0..7]
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ld1 {v2.8h}, [x2], #16 // filter[0..7]
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smlal v0.4s, v1.4h, v2.4h // accumulator += src[0..3] * filter[0..3]
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smlal2 v0.4s, v1.8h, v2.8h // accumulator += src[4..7] * filter[4..7]
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subs w3, w3, #8 // filter_length -= 8
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b.gt 1b // loop until filter_length
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addp v0.4s, v0.4s, v0.4s // pair adding of the 4x32-bit accumulated values
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addp v0.4s, v0.4s, v0.4s // pair adding of the 4x32-bit accumulated values
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st1 {v0.s}[0], [x0], #4 // write accumulator
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ret
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endfunc
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