mirror of https://github.com/FFmpeg/FFmpeg.git
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/* |
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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 |
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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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