decoding: non-optimal encodings

[derekbruening]

From derek.br...@gmail.com on February 14, 2009 10:13:53

non-optimal encodings:

• we require user to specify OPSZ_0 to get c1: o/w we use Ib
  we do document this in some INSTR_CREATE macros
• we do not use 41 90 but instead 41 87 c0 since complex and we don't trust
  that all processors treat 41 90 as a non-nop

Original issue: http://code.google.com/p/dynamorio/issues/detail?id=10