nly certain
members, this option can be used to enable those beyond the basic standard
instruction set. A hex digit may follow the 'x' to indicate a mask value
used in selecting the appropriate instruction set. Bit 0 of the mask selects
the basic instruction set, thus a '-x1' would have no effect. A '-x3' would
enable the basic set plus whatever instructions have bit 1 set in their
class mask. A '-x' without a digit following is equivalent to a '-xf' which
sets all four of the mask bits. The following table