[Patch,AVR] Support instrucions XCH, LAT, LAC, LAS

[Denis Chertykov]

2012/5/23 Georg-Johann Lay <avr@gjlay.de>:
> This patch adds support for the XMEGA atomic memory instructions
>
> o exchange
> o load-and-set
> o load-and-clear
> o load-and-toggle
>
>
> Johann
>
>
> include/
>        * opcode/avr.h (AVR_ISA_XCH): New define.
>        (AVR_ISA_XMEGA): Use it.
>        (XCH, LAS, LAT, LAC): New XMEGA opcodes.

Approved.

Denis.