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From: "thenlich at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/49010] New: Result of MOD and MODULO intrinsic has wrong sign Date: Mon, 16 May 2011 09:00:00 -0000 [thread overview] Message-ID: <bug-49010-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49010 Summary: Result of MOD and MODULO intrinsic has wrong sign Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned@gcc.gnu.org ReportedBy: thenlich@users.sourceforge.net If the first argument to the MOD and MODULO intrinsic is negative, and the magnitude of the result is zero, the function returns a negative zero. Fortran 2003/2008: MOD: The value of the result is A − INT (A/P) * P. MODULO: The value of the result is A − FLOOR (A / P) * P. The values returned by these intrinsics should be the same as the expressions by which the functions are defined; which is zero, without a negative sign. Example: program test_mod real :: a, p a = -4.0 p = 2.0 print *, mod(a, p), a - int(a / p) * p ! -0 0 expected 0 0 print *, modulo(a, p), a - floor(a / p) * p ! -0 0 expected 0 0 end program test_mod
next reply other threads:[~2011-05-16 8:26 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-05-16 9:00 thenlich at users dot sourceforge.net [this message] 2011-05-16 10:49 ` [Bug fortran/49010] " burnus at gcc dot gnu.org 2011-05-16 21:03 ` kargl at gcc dot gnu.org 2011-05-16 21:29 ` sgk at troutmask dot apl.washington.edu 2011-05-16 22:24 ` sgk at troutmask dot apl.washington.edu 2011-05-17 7:40 ` thenlich at users dot sourceforge.net 2011-05-17 10:18 ` jb at gcc dot gnu.org 2011-05-17 12:30 ` thenlich at users dot sourceforge.net 2011-05-17 14:34 ` jb at gcc dot gnu.org 2011-05-17 14:48 ` sgk at troutmask dot apl.washington.edu 2011-05-17 15:15 ` sgk at troutmask dot apl.washington.edu 2011-05-17 16:36 ` jb at gcc dot gnu.org 2012-05-05 8:00 ` jb at gcc dot gnu.org 2012-05-05 8:17 ` jb at gcc dot gnu.org
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