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From: john@ghostwheel.unm.edu (John Prentice)
Newsgroups: comp.lang.fortran
Subject: Cray conditional vector merge
Message-ID: <1991Feb24.050433.21694@ariel.unm.edu>
Date: 24 Feb 91 05:04:33 GMT
Organization: University of New Mexico, Albuquerque, NM
Lines: 18

I have a question for the Cray guru's out there.  When you execute
a conditional vector merge in Cray Fortran, what is really happening?
For example, consider:

    a=cvmgp(f(x),g(x),h(x))

where f,g, and h are some arithmetic functions.  Does it compute both
f(x) and g(x) and then return only one depending on what the value
of h(x) is or does it only compute f(x) or g(x) as required depending
on the value of h(x)?  

Appreciate any help.

John
--
John K. Prentice    john@unmfys.unm.edu (Internet)
Dept. of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA
Computational Physics Group, Amparo Corporation, Albuquerque, NM, USA