インテル® Fortran コンパイラー XE 13.1 ユーザー・リファレンス・ガイド
Inquiry Module Intrinsic Function (Generic): Returns whether the processor supports IEEE arithmetic.
The result is a scalar of type default logical. If x is omitted, the result has the value true if the processor supports IEEE arithmetic for all real values; otherwise, false.
If x is specified, the result has the value true if the processor supports IEEE arithmetic for real variables of the same kind type parameter as x; otherwise, false.
If real values are implemented according to the IEEE standard except that underflowed values flush to zero (abrupt) instead of being denormal.