インテル® Fortran コンパイラー 19.0 デベロッパー・ガイドおよびリファレンス
Elemental Intrinsic Function (Generic): Returns the class of an IEEE* real (binary32, binary64, and binary128) argument. This function cannot be passed as an actual argument.
result = FP_CLASS (x)
x |
(Input) Must be of type real. |
The result type is INTEGER(4). The return value is one of the following:
Class of Argument |
Return Value |
|---|---|
Signaling NaN |
FOR_K_FP_SNAN |
Quiet NaN |
FOR_K_FP_QNAN |
Positive Infinity |
FOR_K_FP_POS_INF |
Negative Infinity |
FOR_K_FP_NEG_INF |
Positive Normalized Number |
FOR_K_FP_POS_NORM |
Negative Normalized Number |
FOR_K_FP_NEG_NORM |
Positive Denormalized Number |
FOR_K_FP_POS_DENORM |
Negative Denormalized Number |
FOR_K_FP_NEG_DENORM |
Positive Zero |
FOR_K_FP_POS_ZERO |
Negative Zero |
FOR_K_FP_NEG_ZERO |
The preceding return values are defined in file for_fpclass.for.
FP_CLASS (4.0_8) has the value 4 (FOR_K_FP_POS_NORM).