🚀 go-pugleaf

I can think of several uses for this instruction.  Exponentiation is
one obvious example.  Although I can't recall specifics, I know I have
on *many* occasions done a branch based on the low bit of an integer.

I am equally sure that this is NOT the reason the instruction exists.
Such an instruction is especially useful in handling bit patterns
used for controlling execution, and there is probably a good reason
in the architecture or operating system for this.

An afterthought.  I mean exponentiation of integers or exponentiation
in some other group or ring.  ("I suppose there probably *are* other
kinds of exponentiation," he said, in an attempt at humor.)

Duncan Buell
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|   Duncan A. Buell                    Senior Research Scientist       |
|   301-805-7372                       Supercomputing Research Center  |
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|   duncan@super.org                   Bowie, Maryland 20715           |
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