Support "compare double ansd swap" insns: CDS, CDSY, and CDSG 
valgrind bits for fixing bugzilla #291865. See also VEX r2372.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12615 a5019735-40e9-0310-863c-91ae7b9d1cf9
20 files changed