3 ms·
> I examined the ARM-1's barrel shifter on the die. It takes roughly 10% of the chip so it's a fairly hefty investment. > Functions like multiply and divide ar
by segfaultbuserr 7y ago
> I examined the ARM-1's barrel shifter on the die. It takes roughly 10% of the chip so it's a fairly hefty investment.
> Functions like multiply and divide are more useful than barrel shifting, and those were missing too.
My thought was that the lack of multiplier/divider can be somewhat compensated by adding a cheaper 8-bit barrel shifter instead. So according to your analysis, apparently even that didn't make economic sense for a 8-bit chip.
Thanks a lot for giving an authoritative assessment, Ken!