[AArch64][SVE 21/32] Add Zn and Pn registers

[AArch64][SVE 21/32] Add Zn and Pn registers

This patch adds the Zn and Pn registers, and associated fields and
operands.

include/
	* opcode/aarch64.h (AARCH64_OPND_CLASS_SVE_REG): New
	aarch64_operand_class.
	(AARCH64_OPND_CLASS_PRED_REG): Likewise.
	(AARCH64_OPND_SVE_Pd, AARCH64_OPND_SVE_Pg3, AARCH64_OPND_SVE_Pg4_5)
	(AARCH64_OPND_SVE_Pg4_10, AARCH64_OPND_SVE_Pg4_16)
	(AARCH64_OPND_SVE_Pm, AARCH64_OPND_SVE_Pn, AARCH64_OPND_SVE_Pt)
	(AARCH64_OPND_SVE_Za_5, AARCH64_OPND_SVE_Za_16, AARCH64_OPND_SVE_Zd)
	(AARCH64_OPND_SVE_Zm_5, AARCH64_OPND_SVE_Zm_16, AARCH64_OPND_SVE_Zn)
	(AARCH64_OPND_SVE_Zn_INDEX, AARCH64_OPND_SVE_ZnxN)
	(AARCH64_OPND_SVE_Zt, AARCH64_OPND_SVE_ZtxN): New aarch64_opnds.

opcodes/
	* aarch64-tbl.h (AARCH64_OPERANDS): Add entries for new SVE operands.
	* aarch64-opc.h (FLD_SVE_Pd, FLD_SVE_Pg3, FLD_SVE_Pg4_5)
	(FLD_SVE_Pg4_10, FLD_SVE_Pg4_16, FLD_SVE_Pm, FLD_SVE_Pn, FLD_SVE_Pt)
	(FLD_SVE_Za_5, FLD_SVE_Za_16, FLD_SVE_Zd, FLD_SVE_Zm_5, FLD_SVE_Zm_16)
	(FLD_SVE_Zn, FLD_SVE_Zt, FLD_SVE_tzsh): New aarch64_field_kinds.
	* aarch64-opc.c (fields): Add corresponding entries here.
	(operand_general_constraint_met_p): Check that SVE register lists
	have the correct length.  Check the ranges of SVE index registers.
	Check for cases where p8-p15 are used in 3-bit predicate fields.
	(aarch64_print_operand): Handle the new SVE operands.
	* aarch64-opc-2.c: Regenerate.
	* aarch64-asm.h (ins_sve_index, ins_sve_reglist): New inserters.
	* aarch64-asm.c (aarch64_ins_sve_index): New function.
	(aarch64_ins_sve_reglist): Likewise.
	* aarch64-asm-2.c: Regenerate.
	* aarch64-dis.h (ext_sve_index, ext_sve_reglist): New extractors.
	* aarch64-dis.c (aarch64_ext_sve_index): New function.
	(aarch64_ext_sve_reglist): Likewise.
	* aarch64-dis-2.c: Regenerate.

gas/
	* config/tc-aarch64.c (NTA_HASVARWIDTH): New macro.
	(AARCH64_REG_TYPES): Add ZN and PN.
	(get_reg_expected_msg): Handle them.
	(parse_vector_type_for_operand): Add a reg_type parameter.
	Skip the width for Zn and Pn registers.
	(parse_typed_reg): Extend vector handling to Zn and Pn.  Update the
	call to parse_vector_type_for_operand.  Set HASVARTYPE for Zn and Pn,
	expecting the width to be 0.
	(parse_vector_reg_list): Restrict error about [BHSD]nn operands to
	REG_TYPE_VN.
	(vectype_to_qualifier): Use S_[BHSD] qualifiers for NTA_HASVARWIDTH.
	(parse_operands): Handle the new Zn and Pn operands.
	(REGSET16): New macro, split out from...
	(REGSET31): ...here.
	(reg_names): Add Zn and Pn entries.