The W bit is equivalent to the REX prefix's W bit, and specifies a 64-bit operand; for non-integer instructions, it is a general opcode extension bit.
For non-integer instructions, it is a general opcode extension bit. The W bit is equivalent to the REX prefix's W bit, and specifies a 64-bit operand.
The W bit is equivalent to the REX prefix's W bit, and specifies a 64-bit operand. For non-integer instructions, it is a general opcode extension bit.
The W bit is equivalent to the REX prefix's W bit, and specifies a 64-bit operand. For non-integer instructions, it is a general opcode extension bit.