Return the width of the mantissa of this type. This is only valid on floating‐point types. If the FP type does not have a stable mantissa (e.g. ppc long double), this method returns ‐1.
Return the width of the mantissa of this type. This is only valid on floating‐point types. If the FP type does not have a stable mantissa (e.g. ppc long double), this method returns ‐1.