Path: utzoo!attcan!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!hplabs!hp-ses!hpcc01!hpsmdca!phil
From: phil@hpsmdca.HP.COM (Philip Walden)
Newsgroups: comp.sys.hp
Subject: Re: Converting Reals
Message-ID: <9660003@hpsmdca.HP.COM>
Date: 7 Jul 89 16:09:21 GMT
References: <5292@charon.unm.edu>
Organization: HP Surface Mount Development Center
Lines: 32

> / hpsmdca:comp.sys.hp / steve@wayback.unm.edu (Steve Jorgensen-S) / 12:39 pm  Jul  6, 1989 /
> 
> I am working on a program, where I read data files created on a HP 1000 
> computer, and I am trying to use the data on a HP 9000/300.  In the data
> files, I have some floating point numbers to read, and, since they were written
> out in HP 1000 format, the HP 9000 does not interpret them correctly.  So,
> May question is:  How do you convert a 4 byte HP 1000 floating point number
> to a HP 9000 floating point number?  Any help will be appreciated!  Thanks!
> 
I's been a while, but I recall that the HP1000 folks had a library
routine to convert HP1000 FPP to IEEE, which is used by HP9000's.
This routine was originally intended for the HP9000/500s but works
for the 300/800 series.

Digging out my RTE Relocatable Library Reference Manual (cough, cough, whew ..
the dust!), these routines are called DFCHI, FCHI, DFCIH and FCIH.

	status = DFCHI(hpfp, i3efp) - HP1000 dble prec to IEEE dble prec
	status = FCHI(hpfp, i3efp)  - HP1000 sngl prec to IEEE sngl prec
	status = DFCIH(hpfp, i3efp) - IEEE dble prec to HP1000 dble prec
	status = FCIH(hpfp, i3efp)  - IEEE sngl prec to HP1000 sngl prec

Status = 0 if it worked. Hope this helps.

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Philip Walden
Hewlett Packard
Surface Mount Development Center
3500 Deer Creek Road
Palo Alto, CA 94304
(408) 857-3899
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