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60 lines
2.0 KiB
60 lines
2.0 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 "libavutil/riscv/asm.S" |
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func ff_opus_postfilter_rvv, zve32f |
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flw fa0, 0(a2) // g0 |
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slli t1, a1, 2 |
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flw fa1, 4(a2) // g1 |
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sub t0, a0, t1 |
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flw fa2, 8(a2) // g2 |
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addi t1, t0, -2 * 4 // data - (period + 2) = initial &x4 |
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vsetivli zero, 4, e32, m4, ta, ma |
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addi t0, t0, 2 * 4 // data - (period - 2) = initial &x0 |
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vle32.v v16, (t1) |
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addi t3, a1, -2 // maximum parallelism w/o stepping our tail |
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1: |
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vslidedown.vi v8, v16, 2 |
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min t1, a3, t3 |
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vslide1down.vx v12, v16, zero |
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vsetvli t1, t1, e32, m4, ta, ma |
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vle32.v v0, (t0) // x0 |
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sub a3, a3, t1 |
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vslide1down.vx v4, v8, zero |
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sh2add t0, t1, t0 |
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vle32.v v28, (a0) |
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addi t2, t1, -4 |
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vslideup.vi v4, v0, 1 |
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vslideup.vi v8, v4, 1 |
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vslideup.vi v12, v8, 1 |
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vslideup.vi v16, v12, 1 |
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vfadd.vv v20, v4, v12 |
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vfadd.vv v24, v0, v16 |
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vslidedown.vx v16, v0, t2 |
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vfmacc.vf v28, fa0, v8 |
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vfmacc.vf v28, fa1, v20 |
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vfmacc.vf v28, fa2, v24 |
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vse32.v v28, (a0) |
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sh2add a0, t1, a0 |
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bnez a3, 1b |
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ret |
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endfunc
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