Comment out matches() operand flags logic

Also space fix

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

assemble.c

@@ -2100,7 +2100,30 @@ static enum match_result matches(const struct itemplate *itemp,
     }
 
     /*
-     * Check that the operand flags all match up
+     * Check that the operand flags all match up,
+     * it's a bit tricky so lets be verbose:
+     *
+     * 1) Find out the size of operand. If instruction
+     *    doesn't have one specified -- we're trying to
+     *    guess it either from template (IF_S* flag) or
+     *    from code bits.
+     *
+     * 2) If template operand (i) has SAME_AS flag [used for registers only]
+     *    (ie the same operand as was specified somewhere in template, and
+     *    this referred operand index is being achieved via ~SAME_AS)
+     *    we are to be sure that both registers (in template and instruction)
+     *    do exactly match.
+     *
+     * 3) If template operand do not match the instruction OR
+     *    template has an operand size specified AND this size differ
+     *    from which instruction has (perhaps we got it from code bits)
+     *    we are:
+     *      a)  Check that only size of instruction and operand is differ
+     *          other characteristics do match
+     *      b)  Perhaps it's a register specified in instruction so
+     *          for such a case we just mark that operand as "size
+     *          missing" and this will turn on fuzzy operand size
+     *          logic facility (handled by a caller)
      */
     for (i = 0; i < itemp->operands; i++) {
         opflags_t type = instruction->oprs[i].type;