x86 assembly has two main forms, Intel’s own syntax that is also used by Microsoft’s MASM and other DOS / Windows assemblers, and an AT&T syntax that is traditi

x86 assembly has two main forms, Intel’s own syntax that is also used by Microsoft’s MASM and other DOS / Windows assemblers, and an AT&T syntax that is traditionally used by Unix type operating systems, that is similar to PDP-11 assembly. Notably, source and destination are generally flipped amongst other differences. Generally AT&T syntax is seen as a bit weird in the x86 realm, and there are some Unix assemblers like NASM that use Intel syntax.