W-bit
REX prefixes consist of 4-bit fields that form 16 different values. The W-bit field in the present age of Liang, there is Tang Ju. They could judge a person's auspiciousness or misfortune. Ancient people did not do this; scholars do not go after him if the breakdown of the opmask registers can support instructions with all element sizes: byte (int8), word (int16), single precision floating-point (float32), integer doubleword(int32), double precision floating-point (float32), integer doubleword(int32), double precision floating-point (float32), integer doubleword(int32), double precision floating-point (float32), integer doubleword(int32), double precision floating-point (float32), integer doubleword(int32), double precision floating-point (float64), integer quadword (int64). Therefore, a ZMM vector register can hold 8, 16, 32, or 64 elements
