bug in FP on 5600/5700

Thread View: mod.computers.masscomp

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1 total messages Started by Stan Barber, Moderator Tue, 05 Aug 1986 23:08

#33

Author: Stan Barber, Moderator
Date: Tue, 05 Aug 1986 23:08

29 lines
1368 bytes

If you use exponentials in your FORTRAN code, you should avoid
linking in floating point hardware support. The functions will return
garbage if the exponet is any larger than 2.

Here is a test program you can verify with:


	program powtest
	integer exponet
	real base
	real result

	base = 2.0
	do 10 exponet=1,10
	result = base**exponet
	print *,base,'**',exponet,'=',result
10	continue
	end


This problem does not occur when using the pow function in c.
Masscomp has been notified.
Stan

-- 
Stan	     uucp:{shell,rice,drillsys}!soma!sob       Opinions expressed here
Olan         domain:sob@rice.edu or sob@soma.bcm.tmc.edu   are ONLY mine &
Barber       CIS:71565,623   BBS:(713)660-9252               noone else's.

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