def to_fp(self, sort, rm=None):
if rm is None:<EOL><INDENT>rm = fp.RM.default()<EOL><DEDENT>return fpToFP(rm, self, sort)<EOL>
Convert this float to a different sort

:param sort:    The sort to convert to
:param rm:      Optional: The rounding mode to use
:return:        An FP AST