The following series of patches improves usage of the risbg and
risbgn instructions on s390/s390x.  The patches have been
regression tested on s390 and s390x and pass the Spec2006
testsuite without any negative effects.

Patch 1 introduces a new mode attribute to simplify some
instruction patterns.

Patch 2 enables wraparound of bit ranges and rewrites portion of
the bitrange calculation code to do so.

Patch 3 adds new patterns and tests based on the first two patches
to make better use of the risbg and risbgn instructions.

Please check the individual Changelogs for details.


Dominik ^_^  ^_^


Dominik Vogt
IBM Germany

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