41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/*
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* Copyright (c) 2021 Loongson Technology Corporation Limited
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* Contributed by Jin Bo <jinbo@loongson.cn>
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* Contributed by Lu Wang <wanglu@loongson.cn>
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "./vpx_config.h"
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#include "vpx_ports/loongarch.h"
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#define LOONGARCH_CFG2 0x02
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#define LOONGARCH_CFG2_LSX (1 << 6)
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#define LOONGARCH_CFG2_LASX (1 << 7)
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#if CONFIG_RUNTIME_CPU_DETECT
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#if defined(__loongarch__) && defined(__linux__)
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int loongarch_cpu_caps(void) {
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int reg = 0;
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int flag = 0;
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__asm__ volatile("cpucfg %0, %1 \n\t" : "+&r"(reg) : "r"(LOONGARCH_CFG2));
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if (reg & LOONGARCH_CFG2_LSX) flag |= HAS_LSX;
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if (reg & LOONGARCH_CFG2_LASX) flag |= HAS_LASX;
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return flag;
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}
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#else /* end __loongarch__ && __linux__ */
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#error \
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"--enable-runtime-cpu-detect selected, but no CPU detection method " \
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"available for your platform. Reconfigure with --disable-runtime-cpu-detect."
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#endif
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#else /* end CONFIG_RUNTIME_CPU_DETECT */
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int loongarch_cpu_caps(void) { return 0; }
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#endif
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