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notzed
Challenger

catalyst 12.4, tahiti, floating point exception with small local work size

Strange bug, again with catalyst 12.4 and a HD 7970 and on a linux 64-bit machine.

If i run the attached programme with a local work size < 64, it throws a floating point exception.  See also the backtrace, as it is.  It works fine if i use the CPU device instead of the Tahiti device, or if the size >= 64.

It seems this is normally ignored in C, but in Java(JOCL) it causes an abort, for no apparently adequate reason.

I've been pulling my hair out for a couple of days with various bugs in my or others code exposed by the new driver/device, but I think this is one is at least not mine (the reason it's 42 is i was playing with a port of clsurf).

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kcarney
Staff
Staff

Re: catalyst 12.4, tahiti, floating point exception with small local work size

Thanks for reporting this. I'll let the QA team know. An AMD person will follow up with you by email on this. 

Cheers!

Kristen

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