The log10 operator in gfortran (cygwin build 20041213) does not work properly if
the statement is operated on a variable, but it works fine when operating on a
constant. The plain log statement works fine regardless. If the following
program is executed, one can observer that log for the two methods generates the
same value, but log10 using the different methods produces different results.
The 10*log10(tst) appears to generate -Infinity, where it should generate -50.
program test
implicit none
real :: tst
tst=1e-5
write(*,*) 10*log(1e-5), 10*log(tst)
write(*,*) 10*log10(1e-5), 10*log10(tst)
end program test
--
Summary: log10 statement does not work properly in gfortran
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: mgilbert at airborne dot nrl dot navy dot mil
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19443
