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40 lines
1.2 KiB
40 lines
1.2 KiB
/* |
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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 "config.h" |
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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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