Fabiano Ramos <ramosf@xxxxxxxxxxx> writes: > How many different instructions are in the IA-32 architecture? > I cannot find this info. There are many instructions. And there are many variants of the architecture, with slightly different instruction sets. And you can count the instructions in different ways, depending upon how you count addressing modes, which are expressed differently in different syntaxes. That said, you can get a very rough approximation by looking closely at this file: http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/include/opcode/i386.h?rev=1.43&content-type=text/x-cvsweb-markup&cvsroot=src Ian