Basic HTML version of Foils prepared
17 Sept 1996
Foil 56 WHERE (masked array assignment) in HPF
From
New CPS615HPF and Fortran90 Discussion Sept 17 96 Basic Simulation Track for Computational Science CPS615 --
Fall Semester 96
.
by
Geoffrey C. Fox, Tom Haupt
1
This is as in CMFortran and Maspar MPFortran with example:
WHERE (A .GT. 0) A = A - 100
2
Semantics of WHERE statement:
1. evaluate mask (in parallel) and store as a temporary T1
2. for each i that T1(i)=.TRUE. compute T2(i)=A(i) - 100
3. for each i that T1(i)=.TRUE. assign A(i)=T2(1)
in Table To:
©
on Tue Oct 7 1997
