NAME
    IEEEDPNeg -- compute negative value of IEEE double precision number
SYNOPSIS
      x   = IEEEDPNeg(  y  );
    d0/d1             d0/d1
    double  x,y;
FUNCTION
    Invert the sign of argument y and return it to caller.
INPUTS
    y - IEEE double precision floating point value
RESULT
    x - IEEE double precision floating point value
BUGS
SEE ALSO