MIPSR6 does away with the HI/LO registers and have multiplication instructions which return the result to GPR registers. Pre-R6 MIPS cores have the MUL instruc

MIPSR6 does away with the HI/LO registers and have multiplication instructions which return the result to GPR registers. Pre-R6 MIPS cores have the MUL instruction which hide the usage of the HI/LO registers, but do clobber those registers.