From: [log in to unmask]
Sent: Thursday, April 06, 2017 4:34 PM
>I beg to differ: on the CDC, in the late 70s, Real was 60 bit.
> According to my observation the 4-8-16 byte rule appeared later, mainly with the PCs.
>Not sure about the VAXes.
The good old days I was referring to were the 1950s and 1960s.
>Best wishes
>Alois
------ Originalnachricht------
Von: Robin Vowels
Datum: Do., 6. Apr. 2017 05:15
An: [log in to unmask];
Betreff:Re: REAL64 what is it good for!
From: Clune, Thomas L. (GSFC-6101)Sent: Thursday, April 06, 2017 6:37 AM
> In the good-old-days, DOUBLE PRECISION was often something like 128 bits (and definitely not >
> IEEE!).
In the good old days before those good old days, DOUBLE PRECISION was 64 bits.
> But that historic issue aside, using DOUBLE PRECISION is a real pain if you want to change
> to a different precision. The KIND mechanism will generally allow us to at least control
> the precision in a small number of “well chosen” spots in the code.
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