X86-assembly/Instructions/or

You are here:

X86-assembly

Instructions

or

Description

• The or instruction performs a logical OR operation.
• This is the equivalent to the "|" (pipe) operator in python:

>>> hex(0x18 | 0x7575)
'0x757d'

Syntax

or destination, value

Example

mov eax, 0x18 ;11000 in binary or eax, 0x7575 ;111010101110101 in binary The above example will store 0x757D (0111010101111101 in binary) into EAX.

00000000 00011000 01110101 01110101 ----------------- 01110101 01111101