An Overview of Intel's MMX Technology

An introduction to MMX and how to take advantage of its capabilities in your program.

Is all this worth the trouble? The answer to this question depends on the importance you give to speed. Comparing the MMX example program to a pure C language version, the speed improvements speak for themselves. The MMX routine is roughly 14 times faster than the C version (Listing 2 in the archive file) when compiled with no optimizations and about five times faster when full -O2 optimizations are enabled. Of course, you will lose portability and will probably have a harder time writing and debugging assembly language code. Life's full of tough choices, isn't it?


Ariel Ortiz Ramirez is a faculty member in the Computer Science Department of the Monterey Institute of Technology and Higher Education, Campus Estado de Mexico. He has been using Linux to teach x86 assembly language for two semesters now. Although he has taught several different programming languages for almost a decade, he personally has much more fun when programming in Scheme. He can be reached at



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Listing 2??

Anonymous's picture

Where is the listing 2 man>>>????

On the FTP server

Mitch Frazier's picture

The term "archive file" is referring to the article resources file: 3244.tgz on our ftp server.

Mitch Frazier is an Associate Editor for Linux Journal.

mmx tecknology

vishnuprasad.k.s's picture

what is the mmx tecknology.what is the use.

MMX help

FM's picture

I work with nasm assembler & bochs as a pc emulator to enter to pmode and in this mode overlaying a picture on a background. i could enter to protected mode but i dont know how to load my image.and what is the use of FAT12.i wrote my program in assembly. could you help me.Any help would be greatly appreciated.

intel mmx technology

D.BHARAT KUMAR's picture

it is a multimedia communication system