| /* |
| * Copyright (c) 2024 Institue of Software Chinese Academy of Sciences (ISCAS). |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/riscv/asm.S" |
| |
| func ff_rv34_inv_transform_dc_rvv, zve32x |
| lh t1, 0(a0) |
| li t0, 13 * 13 * 3 |
| mul t2, t0, t1 |
| srai t2, t2, 11 |
| vsetivli zero, 16, e16, m2, ta, ma |
| vmv.v.x v8, t2 |
| vse16.v v8, (a0) |
| |
| ret |
| endfunc |
| |
| func ff_rv34_idct_dc_add_rvv, zve32x |
| vsetivli zero, 4, e8, mf4, ta, ma |
| vlse32.v v0, (a0), a1 |
| li t1, 169 |
| mul t1, t1, a2 |
| li a2, 255 |
| addi t1, t1, 512 |
| srai t1, t1, 10 |
| vsetivli zero, 4*4, e16, m2, ta, ma |
| vzext.vf2 v2, v0 |
| vadd.vx v2, v2, t1 |
| vmax.vx v2, v2, zero |
| vsetvli zero, zero, e8, m1, ta, ma |
| vnclipu.wi v0, v2, 0 |
| vsetivli zero, 4, e8, mf4, ta, ma |
| vsse32.v v0, (a0), a1 |
| |
| ret |
| endfunc |
