I'm working on an AMD FX-6100, which has bulldozer subarch. But
cpuinfo2cpuflags-x86 doesn't not include 3dnow nor 3dnowext. I don't think it is a good idea to include microcode that the CPU doesn't actually support?
Maybe it would be better to tell the readers to refer to http://www.funtoo.org/News:CPU_FLAGS_X86 for optimization?