[PATCH/AArch64] Implement LSE feature

[PATCH/AArch64] Implement LSE feature

2014-09-03  Jiong Wang  <jiong.wang@arm.com>

  gas/
	* config/tc-aarch64.c (parse_operands): Recognize PAIRREG.
	(aarch64_features): Add entry for lse extension.

  include/opcode/
	* aarch64.h (AARCH64_FEATURE_LSE): New feature added.
	(aarch64_opnd): Add AARCH64_OPND_PAIRREG.
	(aarch64_insn_class): Add lse_atomic.
	(F_LSE_SZ): New field added.
	(opcode_has_special_coder): Recognize F_LSE_SZ.

  opcode/
	* aarch64-tbl.h (QL_R4NIL): New qualifiers.
	(aarch64_feature_lse): New feature added.
	(LSE): New Added.
	(aarch64_opcode_table): New LSE instructions added.  Improve
	descriptions for ldarb/ldarh/ldar.
	(aarch64_opcode_table): Describe PAIRREG.
	* aarch64-opc.h (aarch64_field_kind): Add FLD_lse_sz.
	* aarch64-opc.c (fields): Add entry for F_LSE_SZ.
	(aarch64_print_operand): Recognize PAIRREG.
	(operand_general_constraint_met_p): Check reg pair constraints for CASP
	instructions.
	* aarch64-dis.c (aarch64_ext_regno_pair): New extractor for paired reg.
	(do_special_decoding): Recognize F_LSE_SZ.
	* aarch64-asm.c (do_special_encoding): Recognize F_LSE_SZ.

  gas/testsuite/
	* gas/aarch64/lse-atomic.d: New.
	* gas/aarch64/lse-atomic.s: Likewise.
	* gas/aarch64/illegal-lse.d: Likewise.
	* gas/aarch64/illegal-lse.l: Likewise.
	* gas/aarch64/illegal-lse.s: Likewise.
	* gas/aarch64/diagnostic.s: Check processor feature detect for lse
	instruction.
	* gas/aarch64/diagnostic.l: Likewise.