| /* | |
| * Copyright © 2022 Rémi Denis-Courmont. | |
| * | |
| * 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 | |
| */ | |
| /** | |
| * Returns the vector size in bytes (always a power of two and at least 4). | |
| * This is undefined behaviour if vectors are not implemented. | |
| */ | |
| static inline size_t ff_get_rv_vlenb(void) | |
| { | |
| size_t vlenb; | |
| __asm__ ( | |
| ".option push\n" | |
| ".option arch, +v\n" | |
| " csrr %0, vlenb\n" | |
| ".option pop\n" : "=r" (vlenb)); | |
| return vlenb; | |
| } | |