SIGN_Positive
negative = (m64 & 0x80000000) ? SIGN_Negative : SIGN_Positive;
negative = (m32 & 0x80000000) ? SIGN_Negative : SIGN_Positive;
sign = SIGN_Positive;
negative = SIGN_Positive;
negative = SIGN_Positive;
sign = sign & 0x80 ? SIGN_Negative : SIGN_Positive;