;================================================= ;routine: mult_soft ; fuction: 8-bit unsigned multiplier using ; shift-and-add algorithm ; input register: ; s3: multiplicand ; s4: multiplier ; output register ; s5: upper byte of product ; s6: lower byte of product ; temp registr: i ;================================================= mult_soft: load s5, 00 load i, 08 mult_loop: sr0 s4 jump nc, shift_prod add s5, s3 shidt_prod: sra s5 sra s6 sub i, 01 jump nz, mult_loop return 程式码如上，因对此小弟看不懂，特地到贵版求助 请各位大大伸出援手帮帮我！ 感激不尽 --

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