Date: Wed, 02 May 2012 23:08:52 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: Pragma unroll On 05/02/2012 07:25 PM, Claudio André wrote: >> If anyone cares, here is the correct one: > >> #ifdef cl_nv_pragma_unroll >> #pragma OPENCL EXTENSION cl_nv_pragma_unroll : enable >> #endif > > Magnum, are you happy with your results? I'm not with mine, so to see the > log i put an error inside OpenCL code and got this on GTX 570: > > :19:27: warning: unknown '#pragma OPENCL EXTENSION' - ignored > #pragma OPENCL EXTENSION cl_nv_pragma_unroll : enabled > > Makes sense since i haven't seen any performance gain (or loss). I have the exact same experience. Like I wrote the #ifdef is per the OpenCL spec, so the problem is now more of a weirdness with nvidia that will hopefully be fixed with later drivers. The weird thing is that if you google it, many people seem to use pragma unroll without problems. I really hope next versions of everything (Intel, AMD, nvidia) will fix a load of silly little issues like this. OpenCL is very immature. Maybe we should make some noise at their respective support forums but I just don't have the inspiration. Anyway, Most of RAR is manually unrolled where needed. magnum
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