This is a WIP checkpoint; not all tests pass yet.
More matching changes, and hopefully something much closer to what
really is desired now. The number of required patterns is now much
smaller.
However, a lot of *changes* are needed to the patterns.
Since some patterns are repeated all over the place, clean up the
x86/addflags.pl script and make it able to generate macro-based
common patterns; first use being the patterns for the "basic 8"
arithmetic patterns.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
