Date: Tue, 16 Sep 2014 21:14:46 +0200 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: nVidia Maxwell support (especially descrypt)? On 2014-09-11 10:39, Solar Designer wrote: > On Thu, Sep 11, 2014 at 09:54:39AM +0200, magnum wrote: >> For example, it fails >> building under later AMD drivers due to excessive use of 'goto'. Some >> other drivers commit suic^Wsegfault while trying to sort it out. I >> believe using goto in an OpenCL kernel is really begging for problems. > > I'd say it's a compiler problem, but yes we may have to workaround it by > stopping to use goto, even though this kernel's uses of goto are > reasonable. Claudio found this: http://www.khronos.org/message_boards/showthread.php/6457-Error-E010-Irreducible-ControlFlow-Detected "Re: Error:E010:Irreducible ControlFlow Detected That means you have some goto jumping into the middle of a loop. OpenCL compilers are not required to support this kind of unstructured code. Even on compiler that support it, it may hurt performance quite a bit." (David Garcia is member of the OpenCL standard committee) I can't see any place where we are jumping *into* a loop though, just out of loops. But that message is precisely what 14.6beta emits when it throws in the towel. magnum
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