Date: Mon, 21 Oct 2013 11:36:50 +1100 From: Michael Samuel <mik@...net.net> To: john-dev@...ts.openwall.com Subject: Re: Bad version of Intel OpenCL CPU driver On 21 October 2013 09:50, magnum <john.magnum@...hmail.com> wrote: > It dies from this statement in line 73 of phpass kernel: > a = ROTATE_LEFT(a, S11); > > ...and ROTATE_LEFT is defined in line 22: > #define ROTATE_LEFT(x, s) rotate(x,(uint)s) I ran across this with my otp-md5 stuff. Doing old-school C rotate works fine and seems to use a native rot instruction if it's better for all the LLVM based drivers. I also found in older Intel drivers, it would pop everything out of the AVX registers, do a 'rol' instruction, then put them back on - which was definitely not faster than 2 AVX shifts and an or. (Not that this excuses the brokenness) Regards, Michael
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.