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45 lines
1.3 KiB
45 lines
1.3 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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#ifndef AVUTIL_RISCV_CPU_H |
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#define AVUTIL_RISCV_CPU_H |
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#include "config.h" |
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#include <stddef.h> |
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#include "libavutil/cpu.h" |
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#if HAVE_RVV |
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/** |
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* Returns the vector size in bytes (always a power of two and at least 4). |
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* This is undefined behaviour if vectors are not implemented. |
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*/ |
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static inline size_t ff_get_rv_vlenb(void) |
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{ |
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size_t vlenb; |
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__asm__ ( |
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".option push\n" |
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".option arch, +v\n" |
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" csrr %0, vlenb\n" |
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".option pop\n" : "=r" (vlenb)); |
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return vlenb; |
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} |
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#endif |
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#endif
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