$file = <<<EOD
$ cat /var/log/dmesg.boot
Copyright (c) 1992-2007 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 6.2-RELEASE-p8 #0: Sat Oct 27 10:32:07 CEST 2007
root@dev.askozia.com:/usr/src/sys/i386/compile/ASKOZIAPBX_ALIX1X
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Geode(TM) Integrated Processor by AMD PCS (498.05-MHz 586-class CPU)
Origin = "AuthenticAMD" Id = 0x5a2 Stepping = 2
Features=0x88a93d<FPU,DE,PSE,TSC,MSR,CX8,SEP,PGE,CMOV,CLFLUSH,MMX>
AMD Features=0xc0400000<MMX+,3DNow+,3DNow>
EOD;
if (preg_match("/Features.MMX/", $file)) {
print "mmx!\n";
} else {
print "no mmx!\n";
}