Return +1 if this ExactFloat is positive, -1 if it is negative, and 0 if it is zero or NaN. Note that unlike sign_bit(), sgn() returns 0 for both positive and negative zero.
See Implementation
Return +1 if this ExactFloat is positive, -1 if it is negative, and 0 if it is zero or NaN. Note that unlike sign_bit(), sgn() returns 0 for both positive and negative zero.