Reimplement the SIMD and FP instruction decoder, so as to avoid huge
amounts of duplicated decode, and to follow the documentation more
closely.


git-svn-id: svn://svn.valgrind.org/vex@2871 8f6e269a-dfd6-0310-a8e1-e2731360e62c
Move remaining implemented SIMD instructions into the new SIMD/FP
decoding framework.


git-svn-id: svn://svn.valgrind.org/vex@2872 8f6e269a-dfd6-0310-a8e1-e2731360e62c
Remove the old SIMD decoder entirely.


git-svn-id: svn://svn.valgrind.org/vex@2873 8f6e269a-dfd6-0310-a8e1-e2731360e62c
Implement FMUL 2d_2d_d[], 4s_4s_s[], 2s_2s_s[].


git-svn-id: svn://svn.valgrind.org/vex@2874 8f6e269a-dfd6-0310-a8e1-e2731360e62c