[Beowulf] A start in Parallel Programming?
James.P.Lux at jpl.nasa.gov
Tue Mar 13 20:56:14 PDT 2007
At 05:30 PM 3/13/2007, Robert G. Brown wrote:
>On Tue, 13 Mar 2007, Jim Lux wrote:
>>Now that I think about it, I actually quite liked working in PL/I.
>>it's easy to write without GOTOs in FORTRAN...
>> IF (0) 902,902,902
>>is the same as
>> GOTO 902
>Again, I'm left speechless. I wonder if I would have gotten credit on
>all my assignments where they took off points for goto spaghetti...
I should mention that if you want to really obfuscate things, you
could do something like
IF (0) 901,902,903
because you know that only 902 will be a target. And, almost all
compilers could figure out that the argument is fixed, so it would
emit a JMP $902 or whatever... You could make the other targets
something really obscure, and hopefully many pages away, and rather
than make the argument a constant, some complex expression that
always evaluates to the same value (like those "think of a number" puzzles).
Good for detecting copyright infringments, eh?
James Lux, P.E.
Spacecraft Radio Frequency Subsystems Group
Flight Communications Systems Section
Jet Propulsion Laboratory, Mail Stop 161-213
4800 Oak Grove Drive
Pasadena CA 91109
More information about the Beowulf