[PATCH] gas: blackfin: catch invalid register combinations with SEARCH/BITMUX

[Mike Frysinger]

The destination registers for SEARCH cannot be the same.  Same rule
for the source registers for BITMUX.

Attached patch catches this and tests for the issue.  committed.
-mike

gas/:
2011-03-23  Mike Frysinger  <vapier@gentoo.org>

    * config/bfin-parse.y (SEARCH): Return yyerror when dest reg $2 is
    the same as dest reg $4.
    (BITMUX): Return yyerror when dest reg $3 is the same as dest reg $5.

gas/testsuite/:
2011-03-23  Mike Frysinger  <vapier@gentoo.org>

    * gas/bfin/expected_errors.s: Add invalid SEARCH/BITMUX insns.
    * gas/bfin/expected_errors.l: Add expected errors.