How can I change VEX instructions between 16, 32, and 64-bit modes?
Does anyone understand how to work with
MASKMOVDQU, cus I'm stuck by it's instruction from the page 902 of the Intel x64 manual . I am confused on how to adjust the register sizes for this instruction. Here the documentation mentions that the default memory location is DS:DI/EDI/RDI, but the opcode includes 0x66
How should I handle this 0x66? Should I replace it with 0x67 or use the REX.W prefix for EDI/RDI registers to adjust for the different sizes?
So there is a VEX version of this instruction listed as:
How can I change VEX instructions between 16, 32, and 64-bit modes?0 Replies