mirror of https://git.ffmpeg.org/ffmpeg.git
40 lines
1.2 KiB
ArmAsm
40 lines
1.2 KiB
ArmAsm
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/*
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* Copyright © 2022 Rémi Denis-Courmont.
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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 "asm.S"
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// (a0) = (a0) + (a1), (a1) = (a0) - (a1) [0..a2-1]
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func ff_butterflies_fixed_rvv, zve32x
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1:
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vsetvli t0, a2, e32, m1, ta, ma
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vle32.v v16, (a0)
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sub a2, a2, t0
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vle32.v v24, (a1)
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vadd.vv v0, v16, v24
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vsub.vv v8, v16, v24
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vse32.v v0, (a0)
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sh2add a0, t0, a0
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vse32.v v8, (a1)
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sh2add a1, t0, a1
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bnez a2, 1b
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ret
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endfunc
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