The mov to/from cr/dr behave as if they were encoded with Mod = 3. When
encoded with Mod != 3, no displacement or SIB bytes are fetched.
Add a test with a deliberately malformed ModRM byte. (Also add the
automatically-generated simd.h to .gitignore.)
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>