1
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Are all CPU computations done using registers?
Yes and no.
Ignoring special-purpose CPUs (e.g. stack machines, which still matter), most instruction set architectures (ISA for short) fall into one of two fuzzy categories:
Load/store architectures,...
1
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Can computers only add?
Computers can perform any algorithm using only addition (or even using only the x86 MOV instruction).
But what they have is a set of instructions aiming to maximize performance.
A computer that only ...
1
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Can computers only add?
If “the only thing a computer can do is adding”, then a computer can do everything it does just by adding.
But by adding you can’t change a 1 to a 0. There are many things you can’t do just by adding.
...
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