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libavutil/loongarch/cpu.c
61 строка
2 KB
Brad Smith
avutil/cpu_internal: Provide ff_getauxval() wrapper for getauxvaul()
09 сен 2024, 13:20
09 сен 2024, 13:20
fe4b9ef
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/* * Copyright (c) 2020 Loongson Technology Corporation Limited * Contributed by Shiyou Yin <yinshiyou-hf@loongson.cn> * * 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 <stdint.h> #include "cpu.h" #include <sys/auxv.h> #define LA_HWCAP_LSX (1<<4) #define LA_HWCAP_LASX (1<<5) static int cpu_flags_getauxval(void) { int flags = 0; int flag = (int)ff_getauxval(AT_HWCAP); if (flag & LA_HWCAP_LSX) flags |= AV_CPU_FLAG_LSX; if (flag & LA_HWCAP_LASX) flags |= AV_CPU_FLAG_LASX; return flags; } int ff_get_cpu_flags_loongarch(void) { #if defined __linux__ return cpu_flags_getauxval(); #else /* Assume no SIMD ASE supported */ return 0; #endif } size_t ff_get_cpu_max_align_loongarch(void) { int flags = av_get_cpu_flags(); if (flags & AV_CPU_FLAG_LASX) return 32; if (flags & AV_CPU_FLAG_LSX) return 16; return 8; }