Date: Tue, 8 Nov 2011 13:24:21 -0600 From: "jfoug" <jfoug@....net> To: <john-dev@...ts.openwall.com> Subject: RE: floating-point math after MMX Would a P3 'ever' be used in an MPI build? >From: magnum [mailto:john.magnum@...hmail.com] > >2011-11-08 20:04, Solar Designer wrote: >> I expect that >> 0022-j7-Fix-for-huge-figures-in-MPI-sum-avg-cps-64-bit-ov.patch and >> 0027-j7-Optionally-output-number-of-candidates-tried.patch would cause >> misreporting when running MMX-using builds (and formats for which MMX >> specifically is actually used) on certain CPUs. I previously observed >> this on Pentium 3, for which there's now a workaround in -jumbo's >> status.c: status_get_ETA() and status_get_totalETA(), but not in other >> functions. Basically, we only issue the EMMS instruction right before >> doing floating-point math. >> >> Is this something you can test for (on a P3) and patch now or should >I? > >I have no idea where to find a P3... I guess you get to do it. > >magnum
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