what is his processor? https://en.wikipedia.org/wiki/Pentium_FDIV_bug
On Wed, 26 Apr 2017 11:28:00 -0400 Peter Teeson <peter.tee...@icloud.com> wrote: > Works OK on my Early 2009 Mac Pro running macOS 10.10.5 Yosemite and APL > #svn927 > > You have different HW but same OS & toolchain? > So how about trying a different toolchain to see if it is the compiler etc? > Or what about trying to disassemble the coded at the point of execution? > Could it be something like missing an overflow? > > Just my 0.02¢ > > Peter > > On Apr 26, 2017, at 1:44 AM, Frederick Pitts <fred.pi...@comcast.net> wrote: > > > > To all, > > > > I have 3 machines running 64-bit Fedora 25 Workstation with g++ > > (GCC) 6.3.1 20161221 (Red Hat 6.3.1-1) and either gnu-apl svn version > > 889 or 933. Two of the machines are about 8 years old and one less > > than a year old. > > > > On all three platforms, gnu-apl gives: > > > > 3J1 | 23J1 25J25 > > 3J1 0 > > > > Juergen and Xtian (on svn 933) report their setups give the > > right answer: > > > > 0 0 > > > > Am I the only one seeing this problem? BTW, I have about 1500 > > more examples of the modulo operator failing out of 6765201 tests with > > distinct argument values. > > > > Regards, > > > > Fred > > > > > > On Tue, 2017-04-25 at 23:01 -0400, Christian Robert wrote: > >> Same result as Juergen, > >> > >> Xtian. > >> > >> [xtian@centos-7:/home/xtian] $ apl > >> > >> ______ _ __ __ __ ___ ____ __ > >> / ____// | / // / / / / | / __ \ / / > >> / / __ / |/ // / / / / /| | / /_/ // / > >> / /_/ // /| // /_/ / / ___ | / ____// /___ > >> \____//_/ |_/ \____/ /_/ |_|/_/ /_____/ > >> > >> Welcome to GNU APL version 1.7 / 933M > >> > >> Copyright (C) 2008-2016 Dr. Jürgen Sauermann > >> Banner by FIGlet: www.figlet.org > >> > >> This program comes with ABSOLUTELY NO WARRANTY; > >> for details run: apl --gpl. > >> > >> This program is free software, and you are welcome to > >> redistribute it > >> according to the GNU Public License (GPL) version 3 or > >> later. > >> > >> SAVED 2017-03-30 22:33:13 (GMT-4) > >> 23J1 25J25 ÷ 3J1 > >> 7J¯2 10J5 > >> 3J1 | 23J1 25J25 > >> 0 0 > >> > >> > >> > >> On 2017-04-25 21:50, Frederick Pitts wrote: > >>> Juergen, > >>> > >>> I did a 'make clean' followed by 'make' and 'make > >>> install'. I > >>> obtained the same result that caused me to report the problem. > >>> > >>> The version of gnu-apl I'm using is svn rev 933. From the > >>> banner in your email, I see you're testing with code from your > >>> personal > >>> svn. Is it possible the changes you recently made to > >>> (ComplexCell.hh > >>> and FloatCell.hh) are not yet in the svn from which I clone? > >>> > >>> Regards, > >>> > >>> Fred > >>> > >>> On Tue, 2017-04-25 at 22:05 +0200, Juergen Sauermann wrote: > >>>> Hi Fred, > >>>> > >>>> actually it does on my machine: > >>>> > >>>> ______ _ __ __ __ ___ ____ __ > >>>> / ____// | / // / / / / | / __ \ / / > >>>> / / __ / |/ // / / / / /| | / /_/ // / > >>>> / /_/ // /| // /_/ / / ___ | / ____// /___ > >>>> \____//_/ |_/ \____/ /_/ |_|/_/ /_____/ > >>>> > >>>> Welcome to GNU APL version 1.7 / 12784:12785M > >>>> > >>>> Copyright (C) 2008-2016 Dr. Jürgen Sauermann > >>>> Banner by FIGlet: www.figlet.org > >>>> > >>>> This program comes with ABSOLUTELY NO WARRANTY; > >>>> for details run: apl --gpl. > >>>> > >>>> This program is free software, and you are welcome to > >>>> redistribute it > >>>> according to the GNU Public License (GPL) version 3 or > >>>> later. > >>>> > >>>> 23J1 25J25 ÷ 3J1 > >>>> 7J¯2 10J5 > >>>> > >>>> 3J1 | 23J1 25J25 > >>>> 0 0 > >>>> > >>>> > >>>> However, if I remember correctly then some of the changes that I > >>>> made > >>>> lately were in > >>>> header files (ComplexCell.hh and FloatCell.hh). If you did > >>>> ./configure without options, then > >>>> your build is probably is a 'fast' one, which may not have > >>>> detected > >>>> header file changes. > >>>> > >>>> Please try make clean at the top level and rebuild GNU APL to see > >>>> if > >>>> the problem persists. > >>>> > >>>> Best Regards, > >>>> Jürgen Sauermann > >>>> > >>>> > >>>> > >>>> On 04/25/2017 09:30 PM, Frederick Pitts wrote: > >>>>> Jeurgen, > >>>>> > >>>>> A greatest common divisor of 23J1 and 25J25 is 3J1. > >>>>> Complex division by of 23J1 and 25J25 by 3J1 yields Gaussian > >>>>> integers > >>>>> > >>>>> 23J1 25J25 ÷ 3J1 > >>>>> 7J¯2 10J5 > >>>>> > >>>>> but mod 3J1 of the same numbers does not consistently yield > >>>>> zeroes > >>>>> > >>>>> 3J1 | 23J1 25J25 > >>>>> 3J1 0 > >>>>> > >>>>> I can provide numerous other examples of this problem if > >>>>> needed. > >>>>> > >>>>> Regards, > >>>>> > >>>>> Fred > >>>>> > >>>>> > >>>>> > >>>>> > >>>> > >>>> > >> > >> > > > >
