Article View: comp.arch
Article #13479Re: 64 Vs 32
From: eugene
Date: Thu, 23 Apr 1987 16:55
Date: Thu, 23 Apr 1987 16:55
39 lines
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1890 bytes
>
>(a) You mean I can't declare
>
> integer array huge[0:1048575] ?
>
Here's one from the "real world" [term I was given when asked to give an
ACM talk to one of the CSU schools].
One of my assignments at JPL was to get SPICE running on a VAX [VMS]
(back in 1980). I was given the assignment because there were few VAXen
at JPL then and it would not run on the Univac [1100/81]. The reason
why it would not run on the Univac was the new big array SPICE uses for
a temporary array was :
DIMENSION TEMP(80000)
Univac addressing only allows 65K words of data space. I also have
this program waiting for some standalone time:
DIMENSION IA(256000000)
t1 = second()
do 1 i = 1,256000000
ia(i) = 0.0
1 continue
t2 = second()
time = t2-t1
write(*,*) time
stop
end
So as VLSI goes, I see its simulation as a minimum O(n^2) problem. Just
a matter of time before 64-bits is needed.
From the Rock of Ages Home for Retired Hackers:
--eugene miya
NASA Ames Research Center
eugene@ames-aurora.ARPA
"You trust the `reply' command with all those different mailers out there?"
"Send mail, avoid follow-ups. If enough, I'll summarize."
{hplabs,hao,ihnp4,decwrl,allegra,tektronix,menlo70}!ames!aurora!eugene
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!cbatt!ihnp4!ptsfa!styx!ames!pioneer!eugene From: eugene@pioneer.UUCP Newsgroups: comp.arch Subject: Re: 64 Vs 32 Message-ID: <1351@ames.UUCP> Date: Thu, 23-Apr-87 11:55:51 EST Article-I.D.: ames.1351 Posted: Thu Apr 23 11:55:51 1987 Date-Received: Sat, 25-Apr-87 06:58:30 EST References: <3810013@nucsrl.UUCP> <28200016@ccvaxa> <1316@ames.UUCP> <1071@osiris.UUCP> <751@instable.UUCP> <1109@aw.sei.cmu.edu> Sender: usenet@ames.UUCP Distribution: world Organization: NASA Ames Research Center, Moffett Field, Calif. Lines: 39