ffmpeg | branch: master | Rémi Denis-Courmont <r...@remlab.net> | Tue Sep 27 23:04:21 2022 +0300| [c47ebfa141565a6bcaf6eeb699f135f81efacc63] | committer: Lynne
lavu/riscv: helper to read the vector length > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c47ebfa141565a6bcaf6eeb699f135f81efacc63 --- libavutil/riscv/cpu.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/libavutil/riscv/cpu.h b/libavutil/riscv/cpu.h new file mode 100644 index 0000000000..56035f8556 --- /dev/null +++ b/libavutil/riscv/cpu.h @@ -0,0 +1,45 @@ +/* + * 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 _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
