Language Reference

FNMSUB(A, X, Y)

Floating-point Negative Multiply and Subtract

Returns the result of a floating-point negative multiply-subtract.

Parameters

A

must be of type REAL(8). If compiled on a PowerPC platform with -qarch set for PowerPC compilation, A may alternatively be of type REAL(4).

X

must be of the same type and kind type parameter as A.

Y

must be of the same type and kind type parameter as A.

Result Type and Attributes

Same as A, X, and Y.

Results

The result has a value equal to -(A*X - Y).

Examples

In the following example, the result of FNMSUB is of type REAL(4). It is converted to REAL(8) and then assigned to RES.

    REAL(4) :: A, B, C
    REAL(8) :: RES
 
    RES = FNMSUB(A, B, C)
    END