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IEEECK generates IEEE exceptions #1172

@foxtran

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@foxtran

IEEECK generates division-by-zero exception near

POSINF = ONE / ZERO

and ieee-invalid exception near
NAN1 = POSINF + NEGINF

that makes analysis of division-by-zero (and other IEEE exceptions) in other parts of application more complicated since one has to disable checks before LAPACK calls and enable them back after.

With modern Fortran, the same checks can be done via ieee_arithmetic module without generating exceptions. See #1168.

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