Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

ID 767251
Date 9/08/2022
Public

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IEEE_MAX_NUM_MAG

Inquiry Module Intrinsic Function (Generic): Returns the maximum magnitude of two values. This is equivalent to the IEEE maxNumMag operation.

Module

USE, INTRINSIC :: IEEE_ARITHMETIC

result = IEEE_MAX_NUM_MAG (x,y)

x

(Input) Must be of type REAL.

y

(Input) Must be of type REAL with the same kind type parameter as x.

Results

The result type is REAL with the same kind type parameter as x. The result is x if ABS(y) < ABS(x). The result is the value of y if ABS(x) < ABS(y).

If one of the arguments is a quiet NaN, the result is the value of the argument which is not a quiet Nan. If either or both of the arguments is a signaling NaN, the result is a NaN and IEEE_INVALID signals. Otherwise, the result value is that of either x or y (processor dependent). No exceptions are signaled unless x or y is a signaling NaN.

This is the maxNumMag operation as specified in the ISO/IEC/IEEE 60559:2011 standard.

Example

The result value of IEEE_MAX_NUM_MAG (3.7, -7.5) is -7.5.