Re: IDEA vs DES

According to my references, the PowerPC 601 does an integer multiply in 9 cycles (5 if the 2nd operand is 16 bits or less). An integer divide takes 36 cycles. Adds, etc. take 1 cycle. Floating-point multiplies take 1 cycle for single precision, 2 for double. However, they are pipelined, so if you need to use the results of the multiply on the next instruction, they will take 3 cycles. Floating-point adds take 1 cycle, again with the results available in 3. There is a floating-point (but no integer) multiply-and-add instruction. It has the same timing as the multiply. Hal