constraints.md (ZR): New constraint.

constraints.md (ZR): New constraint.

2012-06-19  Tom de Vries  <vries@codesourcery.com>
            Maxim Kuvyrkov  <maxim@codesourcery.com>

	* config/mips/constraints.md (ZR): New constraint.
	* config/mips/predicates.md (mem_noofs_operand): New predicate.
	* config/mips/mips.c (mips_print_operand): Handle new print modifier.
        * config/mips/mips.h (TARGET_XLP): Define.
	(TARGET_SYNC_AFTER_SC): Update.
	(ISA_HAS_SWAP, ISA_HAS_LDADD): Define.
	* config/mips/sync.md (atomic_exchange, atomic_fetch_add): Use
	XLP-specific swap and ldadd patterns.
	(atomic_exchange_swap, atomic_fetch_add_ldadd): New patterns.

Co-Authored-By: Maxim Kuvyrkov <maxim@codesourcery.com>
From-SVN: r188804