NAME
	IEEESPFloor -- compute Floor function of IEEE single precision number

   SYNOPSIS
	  x   = IEEESPFloor(  y  );
	  d0		      d0

	float	x,y;

   FUNCTION
	Calculate the largest integer less than or equal to x and return it.

   INPUTS
	y -- IEEE single precision floating point value

   RESULT
	x -- IEEE single precision floating point value

   BUGS

   SEE ALSO
	IEEESPCeil()