--- Comment #10 from burnus at gcc dot gnu dot org 2009-03-10 15:29 ---
> Can someone reproduce this with C code?
Yes: The following gives a SIGFPE with -m32 (logf, sqrtf) and with -m64 and
"sqrtf" but not with -m64 with "logf". (Compile with "-fsignaling-nans" and
"-lm".)
--- Comment #9 from janus at gcc dot gnu dot org 2009-02-27 13:15 ---
(In reply to comment #8)
> If it works with some but not all libm routines, it sounds more like a GLIBC
> than like a GCC problem.
Can someone reproduce this with C code?
--
http://gcc.gnu.org/bugzilla/show_bug.c
--- Comment #8 from burnus at gcc dot gnu dot org 2009-02-27 10:49 ---
> Note that the problem also appears for log, while it does not for acosh and
> atanh:
If it works with some but not all libm routines, it sounds more like a GLIBC
than like a GCC problem.
--
http://gcc.gnu.org/
--- Comment #7 from janus at gcc dot gnu dot org 2009-02-27 09:13 ---
Note that the problem also appears for log, while it does not for acosh and
atanh:
real :: x = -5.0
! FPE is not thrown
print *, log(x)
print *, log10(x)
print *, acos(x)
print *, asin(x)
! FPE is thrown
!print *, s
--- Comment #6 from janus at gcc dot gnu dot org 2009-02-27 09:01 ---
On x86_64-unknown-linux-gnu I *do* get the ICE when I compile with -ffast-math
-mfpmath=387. Cf. http://gcc.gnu.org/ml/fortran/2008-11/msg00250.html.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39314
--- Comment #5 from janus at gcc dot gnu dot org 2009-02-26 19:22 ---
Also on i386-apple-darwin9.6.0 the FPEs are thrown correctly.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39314
--- Comment #4 from pinskia at gcc dot gnu dot org 2009-02-26 18:05 ---
Or maybe libc's acos is broken In which case this is not a GCC bug.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39314
--- Comment #3 from burnus at gcc dot gnu dot org 2009-02-26 18:03 ---
Confirm: Here, I get the same result with -m64 on Linux (NaN and no SIGFPE),
but with -m32 (with both -mfpmath=sse and -mfpmath=387) I get the SIGFPE.
The FPE settings are used in libgfortran/config/*; maybe fpu-387.
--- Comment #2 from janus at gcc dot gnu dot org 2009-02-26 15:45 ---
Sorry, forgot to specify the target: x86_64-unknown-linux-gnu.
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janus at gcc dot gnu dot org changed:
What|Removed |Added
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--- Comment #1 from kargl at gcc dot gnu dot org 2009-02-26 15:35 ---
What target?
Works for me on FreeBSD.
laptop:kargl[23] ~/work/bin/gfortran -static -o z -ffpe-trap=invalid j.f90
laptop:kargl[24] ./z
Floating exception (core dumped)
laptop:kargl[25] cat j.f90
real :: x = 1.0
print
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