lfpinit() signed or unsigned?

[Hal Murray]

Stromeko at nexgo.de said:
> Does anybody know of an implementation that does _not_ preserve the
> representation when converting from signed to unsigned integer of the same
> width?  The assumptions already made are: Corresponding signed and unsigned
> representation have the same number of bits, signed uses 2's complement
> representation, there are no extraordinary values and no padding bits in the
> representation. 

I think all modern machines are using 2s complement arithmetic.

50 years ago, a few systems used signed-magnitude and 1s complement.

That "implementation dependent" sort of weasel wording is probably left over to cover that case.  It might actually get interesting if somebody ported a modern c compiler to work on one of those older systems or an emulation of one.


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