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