Date: Mon, 2 Apr 2012 00:38:41 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: fast hashes on GPU On Sun, Apr 01, 2012 at 11:02:10PM +0300, Milen Rangelov wrote: > Well, those are profiler stats from my sha256 and sha512 kernels: > > sha256 (using uint4 vectors): > > Used GPRs = 36 > ALU ops = 1654 > > sha512 (using uint2 vectors): > > Used GPRs = 51 > ALU ops = 5283 Is this for AMD VLIW? Do you limit this to uint2 because you can't afford 100+ GPRs? Do you have similar stats for Nvidia? If things are so bad in terms of register pressure anyway, maybe bitslicing would be of help - at least we'll avoid the 64-bit rotates. Alexander
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.