[Xtensa] add extra check in GAS

Bob Wilson bwilson@tensilica.com
Wed Jul 25 18:25:00 GMT 2007

The Xtensa EXTUI opcode has undefined behavior if its two immediate  
operands sum to greater than 32.  I've committed this patch from  
Sterling Augustine to check for that condition.

2007-07-25  Sterling Augustine  <sterling@tensilica.com>

         * config/tc-xtensa.c (xtensa_extui_opcode): New.
         (xg_expand_assembly_insn): Check for invalid extui operands.
         (md_begin): Initialize xtensa_extui_opcode.

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