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Add an option for enabling floating point exceptions
Issue #961
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Cactus disables floating point exceptions, so that NaNs and Infs can be generated by numerical code. When debugging, it is sometimes very helpful to use these exceptions, as a debugger will tell you exactly which piece of code generates them.
I propose that Cactus should have a run-time parameter, defaulting to "no", which enables floating point exceptions.
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Thorn TAT/NaNCatchers does this (for x86 architectures). It is available from <https://svn.cactuscode.org/projects/TAT/NaNCatcher>.