[math-fun] Name for function IEEE32(x) LOGAND -2^23 ??

Is there a name for the function that simply kills all of the bits of precision from an IEEE floating point number, leaving it as a simple power of 2 ? For a big-endian machine, pick up the 32 bits of the IEEE32 float and AND it with -2^23. Or pick up 64 bits of IEEE64 float and AND it with -2^52.