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9a840ffa17
LSX and LASX is loongarch SIMD extention. They are enabled by default if compiler support it, and can be disabled with '--disable-lsx' '--disable-lasx'. Change-Id: Ie2608ea61dbd9b7fffadbf0ec2348bad6c124476 Reviewed-by: Shiyou Yin <yinshiyou-hf@loongson.cn> Reviewed-by: guxiwei <guxiwei-hf@loongson.cn> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/*
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* Copyright (c) 2020 Loongson Technology Corporation Limited
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* Contributed by Shiyou Yin <yinshiyou-hf@loongson.cn>
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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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#include <stdint.h>
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#include "cpu.h"
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#define LOONGARCH_CFG2 0x2
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#define LOONGARCH_CFG2_LSX (1 << 6)
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#define LOONGARCH_CFG2_LASX (1 << 7)
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static int cpu_flags_cpucfg(void)
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{
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int flags = 0;
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uint32_t cfg2 = 0;
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__asm__ volatile(
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"cpucfg %0, %1 \n\t"
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: "+&r"(cfg2)
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: "r"(LOONGARCH_CFG2)
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);
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if (cfg2 & LOONGARCH_CFG2_LSX)
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flags |= AV_CPU_FLAG_LSX;
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if (cfg2 & LOONGARCH_CFG2_LASX)
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flags |= AV_CPU_FLAG_LASX;
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return flags;
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}
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int ff_get_cpu_flags_loongarch(void)
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{
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#if defined __linux__
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return cpu_flags_cpucfg();
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#else
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/* Assume no SIMD ASE supported */
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return 0;
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#endif
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}
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size_t ff_get_cpu_max_align_loongarch(void)
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{
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int flags = av_get_cpu_flags();
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if (flags & AV_CPU_FLAG_LASX)
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return 32;
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if (flags & AV_CPU_FLAG_LSX)
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return 16;
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return 8;
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}
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