fixes and small optimizations for avx and xop decoding

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11802 6c8e4198-a580-4521-a02f-c9ae86df1db9
update (c) for few files

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11803 6c8e4198-a580-4521-a02f-c9ae86df1db9
update (c) for few files

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11804 6c8e4198-a580-4521-a02f-c9ae86df1db9