Fortran weirdnesses

[Henk Mos]

In <HUDGENS.91Apr29142057 at sun13.sun13.SCRI.FSU.EDU> hudgens at sun13.SCRI.FSU.EDU (Jim Hudgens) writes:


>This is on a Decstation 5000, Ultrix 4.1, f77 == U4V2.0p.

>Anyone ever seen anything like this???  A GKS window appears,
>and then the dbx drops out with the "I/O possible" message.  Anyone
>know what might be causing this?

We have the same problems with 2.0. After creating a window (GKS3D) the
first line you draw will not show up. But there are more serious problems
with 2.0. Compiling with -O3 will give a very good speedup
because sometimes DO loops will just be skipped! We just received
the new 3.0 (2.1 has the same problems) but...

Have a look:

	program test
	a = 3.
	b = 2(a)
	c = 2**3(a)
	write (6,*) b, c
	end

This will compile (3.0) without any errors and the results are:

3.00000  24.00000

There are memory allocation and floating points problems as well, but
they are very difficult to locate. There seems to be an update so we'll
see.

Henk Mos

-- 
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Henk J. Mos, Dept of Physics and Astrophysics, Utrecht University
The Netherlands.  Phone: 31-30-532239    Email: mos at fys.ruu.nl
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