unfortunately cmf was used by the old fpa (floating point
accelerator),
which is replaced by vfp (vector floating point) for some time.
Perhaps I
can try a "cmpvs reg0, reg0" instruction, which sets zero flag if one
argument is NaN (since reg0 is always equal to reg0). Otherwise it
does
nothing (=nop).
That should work, but it would require two branches instead of one
(compare to 0, compare to self).
I'm sure there must be a way to do an IEEE double comparison on ARM
with only one branch.
Geoff
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