Hi, I have been searching through the list of modules but haven't been able to find it: Does Gnulib offer a way to store a signaling NaN in a memory location (if supported by the platform) and some way to check a memory location whether it contains a signaling NaN?
The forthcoming C2x standard will have FLT_SNAN, DBL_SNAN, and LDBL_SNAN, but before that there doesn't seem to be a portable way to get signaling NaNs. In case the following problem is easier: What I really need is a bit pattern for a double that won't be returned by the usual floating-point functions. Thanks, Marc
