mirror of https://git.ffmpeg.org/ffmpeg.git
67 lines
2.3 KiB
ArmAsm
67 lines
2.3 KiB
ArmAsm
/*
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* Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
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* Copyright (c) 2024 Geoff Hill <geoff@geoffhill.org>
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 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_ac3_exponent_min_neon, export=1
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cbz w1, 3f
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1: ld1 {v0.16b}, [x0]
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mov w3, w1
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add x4, x0, #256
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2: ld1 {v1.16b}, [x4]
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umin v0.16b, v0.16b, v1.16b
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add x4, x4, #256
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subs w3, w3, #1
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b.gt 2b
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st1 {v0.16b}, [x0], #16
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subs w2, w2, #16
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b.gt 1b
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3: ret
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endfunc
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function ff_ac3_extract_exponents_neon, export=1
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movi v1.4s, #8
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1: ld1 {v0.4s}, [x1], #16
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abs v0.4s, v0.4s
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clz v0.4s, v0.4s
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sub v0.4s, v0.4s, v1.4s
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xtn v0.4h, v0.4s
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xtn v0.8b, v0.8h
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st1 {v0.s}[0], [x0], #4
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subs w2, w2, #4
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b.gt 1b
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ret
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endfunc
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function ff_float_to_fixed24_neon, export=1
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1: ld1 {v0.4s, v1.4s}, [x1], #32
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fcvtzs v0.4s, v0.4s, #24
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ld1 {v2.4s, v3.4s}, [x1], #32
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fcvtzs v1.4s, v1.4s, #24
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fcvtzs v2.4s, v2.4s, #24
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st1 {v0.4s, v1.4s}, [x0], #32
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fcvtzs v3.4s, v3.4s, #24
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st1 {v2.4s, v3.4s}, [x0], #32
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subs w2, w2, #16
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b.ne 1b
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ret
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endfunc
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