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Re: "Built upon 754"

On Fri, 29 Jan 2016 15:47:45 +0000, John Pryce wrote:
>  There have to be some rules about these.  Did your interval systems
>  in ACRITH etc. completely do without FP numbers?  If so, how?

It did use FP numbers, but in the IBM S/360 HFP (Hexadecimal) format,
which has an exponent range intermediate between those of IEEE Binary32
and Binary64 (namely roughly 10**-85 to 10**75).  That explains the
shorter Kulisch accumulator.

Michel.
---Sent: 2016-01-29 16:33:19 UTC