UASM_i_CPUID_MFC0
UASM_i_CPUID_MFC0(&p, a1, SMP_CPUID_REG);
UASM_i_CPUID_MFC0(p, GPR_K0, SMP_CPUID_REG);
UASM_i_CPUID_MFC0(p, ptr, SMP_CPUID_REG);