* tcg8086.a_op_const_ref and .a_op_const_reg: when splitting a 32-bit OP_AND,
  OP_OR or OP_XOR operation into two 16-bit parts, call a_op_const_reg/ref
  recursively for the 16-bit parts, so certain optimizations can be done if the
  low or high 16-bit of the const are $ffff.



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25703 3ad0048d-3df7-0310-abae-a5850022a9f2