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.
Pre-R6 MIPS cores have the MUL instruction which hide the usage of the HI/LO registers, but do clobber those registers.
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