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