Can analysis detect undefined expressions?

[Dale Worley]

In article <14816.28673F12 at stjhmc.fidonet.org> Dave.Harris at f14.n15.z1.fidonet.org (Dave Harris) writes:
   Are the electronics such that the same memory address can really be
   written to similtaneously?  If so would you expect a completely
   random result or something in the range of 1 to 7?

On the Connection Machine, if you are using the message-passing system
to perform the store, stores that collide will be merged by (1) adding,
(2) or-ing, (3) and-ing, (4) max-ing, (5) min-ing, or (6) picking a
random one.  It all depends on how you set some flag in the
message-passing system.  It is quite conceivable that there are
parallel processors where colliding writes produce completely random
results, if it saves a few nanoseconds somewhere...

Dale Worley		Compass, Inc.			worley at compass.com
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