mirror of
https://github.com/FFmpeg/FFmpeg.git
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45 lines
1.4 KiB
ArmAsm
45 lines
1.4 KiB
ArmAsm
/*
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* Copyright © 2023 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 "config.h"
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#include "libavutil/riscv/asm.S"
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func ff_extract_exponents_rvvb, zve32x, zvbb, zba
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lpad 0
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1:
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vsetvli t0, a2, e32, m8, ta, ma
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vle32.v v8, (a1)
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sub a2, a2, t0
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vneg.v v16, v8
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sh2add a1, t0, a1
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vmax.vv v8, v8, v16
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vclz.v v8, v8
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vsetvli zero, zero, e16, m4, ta, ma
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vncvt.x.x.w v4, v8
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vsetvli zero, zero, e8, m2, ta, ma
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vncvt.x.x.w v2, v4
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vadd.vi v2, v2, 24 - 32
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vse8.v v2, (a0)
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add a0, a0, t0
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bnez a2, 1b
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ret
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endfunc
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