Support for SPARC Leon 3 processor

[Sebastian Huber]

Hello,

the Leon 3 is a processor implementing the SPARC V8 instruction set:

http://en.wikipedia.org/wiki/LEON#LEON3_processor_core

In order to provide better SMP support it implements in addition also 
the CASA instruction defined in SPARC V9:

"68.2.7 Compare and Swap instruction (CASA)"

http://gaisler.com/products/grlib/grip.pdf

We would like to use C11 atomic operations supported by GCC for this 
processor. Currently GCC passes -Av8 to GAS so the assembler would 
complain about the CASA instruction.  I think we need a new SPARC opcode 
architecture for the Leon 3.  Is it all right to start with (opcode/sparc.h)

enum sparc_opcode_arch_val
{
[...]
   SPARC_OPCODE_ARCH_V8_LEON3,
[...]
};

or maybe SPARC_OPCODE_ARCH_V8_CASA?

-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax     : +49 89 189 47 41-09
E-Mail  : sebastian.huber@embedded-brains.de
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