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39 lines
1.2 KiB
39 lines
1.2 KiB
1 year ago
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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_rvb, zbb
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1:
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lw t0, (a1)
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addi a0, a0, 1
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neg t1, t0
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addi a1, a1, 4
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max t0, t0, t1
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addi a2, a2, -1
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clz t0, t0
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addi t0, t0, 24 - __riscv_xlen
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sb t0, -1(a0)
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bgtz a2, 1b
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ret
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endfunc
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