🚀 go-pugleaf

In article <9106190449.AA02871@ucbvax.Berkeley.EDU> jbs@WATSON.IBM.COM writes:
>         Robert Herdon asked:
>While I've seen lots of verbage on the pros and cons of interval..

I've heard yapping about interval arithmetic for a decade and have yet
to see anyone that actually _used_ it. Has anyone implemented a
compiler with set of "interval" data types? Has anyone used interval
arithmetic by doing it themselves with macros/functions/subroutines. 

I'd be interested in seeing more of the uses....

---------

On the conditional assignment topic, since no other ex-Multifloids
spoke up yet, I'll just mention that the Trace family had multiple
condition codes and could do a "select" operation between two values
based on a condition code bit. 

The new machine we were working on upon our demise.., <sniff>, had
both selects and conditional assignments. In a VLIW it isn't very hard
to implement this critters. In a typical scoreboarded machine you
might not like the select instructions as they are 4-address
instructions. In addition, the floating point data path might not have
the ability to transport either source field, etc, etc.

pkr





--
Paul K. Rodman                                     Advanced Systems Division
rodman@sgi.com                                     Silicon Graphics, Inc.
   KA1ZA                                           Mountain View, Ca.