diff options
Diffstat (limited to 'media/libvpx/libvpx/vpx_ports/loongarch_cpudetect.c')
| -rw-r--r-- | media/libvpx/libvpx/vpx_ports/loongarch_cpudetect.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_ports/loongarch_cpudetect.c b/media/libvpx/libvpx/vpx_ports/loongarch_cpudetect.c new file mode 100644 index 0000000000..7b4322d35e --- /dev/null +++ b/media/libvpx/libvpx/vpx_ports/loongarch_cpudetect.c @@ -0,0 +1,40 @@ +/* + * 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 |