Cheat Engine

Xblade Of Heaven

Hi all, i try explain me problem trying move a reg value to other reg and the stored value is a bit confused.

this is the code:

Dark Byte · Posted: Sun Dec 14, 2014 8:49 am Post subject:

Xblade Of Heaven · Posted: Sun Dec 14, 2014 9:07 am Post subject:

thanks again db, using xor rbx,rbx the value stored is now correct.

regards

mgr.inz.Player · Posted: Sun Dec 14, 2014 4:26 pm Post subject:

I often see such things:

movzx rbx,byte ptr [rbx+08]

movsx rbx,byte ptr [rbx+08]

movzx rbx,word ptr [rbx+08]

movsx rbx,word ptr [rbx+08]

movsxd rbx,dword ptr [rbx+08]

also, simple "MOV EAX, EBX" automatically zeroes upper 32 bits of RAX register

64-bit operands generate a 64-bit result in the destination general-purpose register.
32-bit operands generate a 32-bit result, zero-extended to a 64-bit result in the destination general-purpose register.
8-bit and 16-bit operands generate an 8-bit or 16-bit result. The upper 56 bits or 48 bits (respectively) of the destination general-purpose register are not be modified by the operation. If the result of an 8-bit or 16-bit operation is intended for 64-bit address calculation, explicitly sign-extend the register to the full 64-bits.

Xblade Of Heaven · Posted: Sun Dec 14, 2014 6:50 pm Post subject:

thanks too mgr.inz.Player Very Happy