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#include "io.h" int main(void) { long long achi, acho; long long result; achi = 0x004433; result = 0x004433; __asm ("mthi %1, $ac1\n\t" "mfhi %0, $ac1\n\t" : "=r"(acho) : "r"(achi) ); if (result != acho) { printf("mfhi wrong\n"); return -1; } return 0; }