mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef AVUTIL_RISCV_CPU_H
|
|
#define AVUTIL_RISCV_CPU_H
|
|
|
|
#include "config.h"
|
|
#include <stddef.h>
|
|
#include "libavutil/cpu.h"
|
|
|
|
#if HAVE_RVV
|
|
/**
|
|
* 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;
|
|
}
|
|
#endif
|
|
#endif
|