OpenBLAS/cpuid_loongarch64.c

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#include <stdint.h>

#define CPU_UNKNOWN     0
#define CPU_LOONGSON3R5 1

#define LOONGARCH_CFG2  0x02
#define LOONGARCH_LASX  1<<7

static char *cpuname[] = {
  "UNKNOWN",
  "LOONGSON3R5"
};

int detect(void) {
    uint32_t reg = 0;

    __asm__ volatile (
        "cpucfg %0, %1 \n\t"
        : "+&r"(reg)
        : "r"(LOONGARCH_CFG2)
    );

    if (reg & LOONGARCH_LASX)
        return CPU_LOONGSON3R5;
    else
        return CPU_UNKNOWN;
}

char *get_corename(void) {
  return cpuname[detect()];
}

void get_architecture(void) {
  printf("LOONGARCH64");
}

void get_subarchitecture(void) {
  if (detect() == CPU_LOONGSON3R5) {
    printf("LOONGSON3R5");
  } else {
    printf("UNKNOWN");
  }
}

void get_subdirname(void) {
  printf("loongarch64");
}

void get_cpuconfig(void) {
  if (detect() == CPU_LOONGSON3R5) {
    printf("#define LOONGSON3R5\n");
    printf("#define L1_DATA_SIZE 65536\n");
    printf("#define L1_DATA_LINESIZE 64\n");
    printf("#define L2_SIZE 1048576\n");
    printf("#define L2_LINESIZE 64\n");
    printf("#define DTB_DEFAULT_ENTRIES 64\n");
    printf("#define DTB_SIZE 4096\n");
    printf("#define L2_ASSOCIATIVE 16\n");
  } else {
    printf("#define LOONGSON3R5\n");
    printf("#define L1_DATA_SIZE 65536\n");
    printf("#define L1_DATA_LINESIZE 64\n");
    printf("#define L2_SIZE 1048576\n");
    printf("#define L2_LINESIZE 64\n");
    printf("#define DTB_DEFAULT_ENTRIES 64\n");
    printf("#define DTB_SIZE 4096\n");
    printf("#define L2_ASSOCIATIVE 16\n");
  }
}

void get_libname(void){
  if (detect() == CPU_LOONGSON3R5) {
    printf("loongson3r5\n");
  } else {
    printf("loongarch64\n");
  }
}