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Published 20 hours ago • verified publisher icon NFFT

test failure for long-double with threads in windows

Open michaelquellmalz opened this issue 7 years ago • 2 comments

The test checkall_threads.exe fails with enabled long-double precision in Windows, see the logfile checkall_threads.txt. However, the single threaded test checkall.exe passed (checkall.txt). I used GCC 7.2.0 in 64bit MinGW (the check also fails with GCC 5.4.0). Note that these tests only run after the bugfix #55 (which previously caused checkall to crash).

michaelquellmalz avatar Aug 29 '17 13:08 michaelquellmalz

This bug seems to be caused by the OpenMP impementation in MinGW, which seems to do all computations actually in double instead of long double. Inserting the line __asm__("fninit"); in nfft_trafo_direct fixes the problem for this function. But this would have to be done in all OMP calls, but only for long double and only in MinGW ...

michaelquellmalz avatar Sep 04 '17 14:09 michaelquellmalz

I posted a bug report on the MinGW-w64 project which is now under investigation.

michaelquellmalz avatar Oct 05 '17 09:10 michaelquellmalz