Hi : On mips target, mult insns normally modify and refer to hi/lo regs. Giving following two embedded asm insns: 1 __asm__ ("mult %0, $1" : : "r"(a), "r"(b) : "lo"); 2 __asm__ ("mflo %0" : "=r"(c) ); the mult modify specific hard reg lo, and I can describe this by "lo" after the third colon. But what about the mflo? how could I describe that the insn will refer to the "lo" reg? Thanks. -- Best Regards.