Computes (x * y) + z, rounded as one ternary operation.

    This function is supported on OpenVMS Integrity servers and
    Alpha only.

    Format

      #include  <math.h>

      double fma  (double x, double y, double z);

      float fmaf  (float x, float y, float z);

      long double fmal  (long double x, long double y, long double z);

1  –  Argument

 x,y,z

    Real values.

2  –  Description

    The fma functions compute (x * y) + z, rounded as one ternary
    operation: the value is computed as if to infinite precision and
    rounded once to the result format, according to the rounding mode
    characterized by the value of FLT_ROUNDS.

3  –  Return Values

    n                  Upon success, (x * y) + z, rounded as one
                       ternary operation.
    NaN                x or y is NaN; errno is set to EDOM.