The FAQ claims that it does, but ISTR recent discussion about removing
the software emulation. However, a search of the mailing lists, and
Google, fails to show anything, so it is completely possible that my
memory is playing tricks on me.
It was removed last July (src/sys/i386/conf/NOTES rev 1.1091)
We should probably update this comment then, right?
# The Numeric Processing eXtension driver. In addition to this, you
# may configure a math emulator (see above). If your machine has a
# hardware FPU and the kernel configuration includes the npx device
# *and* a math emulator compiled into the kernel, the hardware FPU
# will be used, unless it is found to be broken or unless "flags" to
# npx0 includes "0x08", which requests preference for the emulator.