Items requiring attention:

(hi) Implement OP_DISPATCH_FF for real. (Right now it's treated as
     an unused instruction.)

(md) Use dvmThrowAIOOBE(index, length) for array bounds errors.
(md) Use dvmThrowClassCastException(actual, desired) for class cast errors.
(md) Use dvmThrowArrayStoreException(actual, desired) for array store errors.

(lo) Implement OP_BREAKPOINT
(lo) Implement OP_*_VOLATILE (12 instructions)
(lo) Implement OP_RETURN_VOID_BARRIER
