INSTR_CREATE_mov

[Mohammad Ewais]

Hi,

This may sound like a very simple question, but it has got me really confused.

I am trying to create a good old x86 mov from reg to reg. e.g. mov rax, rdx But I can't find the correct MOV opcode or INSTR_CREATE  to use for it.

The opcodes I found and my understanding of them:

- OP_mov_ld. Source must be memory operand, for example opnd_create_base_disp

- OP_mov_st. Destination must be memory operand

- OP_mov_imm. Source must be immediate

- OP_mov_seg. Either source or destination should be a Segment register

- OP_mov_priv. I don't know what this is?!

There are also five corresponding INSTR_CREATE_ macros with the exact same prefixes. What is the correct OP/Macro I should use if I all I want to do is the following?

INSTR_CREATE_mov_????(drctx, opnd_create_reg(reg1), opnd_create_reg(reg2));

Thanks

[Derek Bruening]

I believe either OP_mov_ld or OP_mov_st can take two registers: their "modrm" byte can select either a base-disp or a plain register which I think is why it was done that way.  Looking at XINST_CREATE_move() helps: it could be used directly (and is cross-platform) or you can see it is defined with mov_ld.

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[Mohammad Ewais]

Thanks a lot Derek.