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Postings from May 2008
On Wed, May 21, 2008 at 10:14:48AM -0700, Lourdes Pe??a Castillo wrote: > # New Ticket Created by "Lourdes Pe??a Castillo" > # Please include the string: [perl #54590] > # in the subject line of all future correspondence about this issue. > # <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=54590 > > > > Hi, > > If I run the following code in perl v5.8.8 built for > x86_64-linux-thread-multi, l get the error "Can't take log of 0 at - line > 1." > > perl > print log(2.5e-310)/log(10); > ^D > > But if I run it in perl v5.8.7 built for i486-linux-gnu-thread-multi, I get > the answer -309.602059991328. > > Is this a known issue with perl 5.8.8. for 64bits? Thanks! I see a difference depending on whether Perl was build using 64 bit integers or not, I get the error when running with 32 bit build, and -309.602059991327962 when running with a 64 bit build. The version (5.8.7, 5.8.8, 5.10.0) doesn't matter, nor does it matter whether it was build with threads or not. It seems that in a 32-bit build, 2.5e-310 gets constant folded to 0. AbigailThread Previous | Thread Next