gas/

gas/
	* config/tc-mips.c (mips_prefer_vec_regno, mips_parse_register):
	New functions, split out from...
	(reg_lookup): ...here.  Remove itbl support.
	(reglist_lookup): Delete.
	(mips_operand_token_type): New enum.
	(mips_operand_token): New structure.
	(mips_operand_tokens): New variable.
	(mips_add_token, mips_parse_base_start, mips_parse_argument_token)
	(mips_parse_arguments): New functions.
	(md_begin): Initialize mips_operand_tokens.
	(mips_arg_info): Add a token field.  Remove optional_reg field.
	(match_char, match_expression): New functions.
	(match_const_int): Use match_expression.  Remove "s" argument
	and return a boolean result.  Remove O_register handling.
	(match_regno, match_reg, match_reg_range): New functions.
	(match_int_operand, match_mapped_int_operand, match_msb_operand)
	(match_reg_operand, match_reg_pair_operand, match_perf_reg_operand)
	(match_addiusp_operand, match_clo_clz_dest_operand)
	(match_lwm_swm_list_operand, match_entry_exit_operand)
	(match_save_restore_list_operand, match_mdmx_imm_reg_operand)
	(match_tied_reg_operand): Remove "s" argument and return a boolean
	result.  Match tokens rather than text.  Update calls to
	match_const_int.  Rely on match_regno to call check_regno.
	(match_pcrel_operand, match_pc_operand): Replace "s" argument with
	"arg" argument.  Return a boolean result.
	(parse_float_constant): Replace with...
	(match_float_constant): ...this new function.
	(match_operand): Remove "s" argument and return a boolean result.
	Update calls to subfunctions.
	(mips_ip, mips16_ip): Call mips_parse_arguments.  Use match routines
	rather than string-parsing routines.  Update handling of optional
	registers for token scheme.

gas/testsuite/
	* gas/mips/vr5400-ill.s, gas/mips/vr5400-ill.l: Add some more cases.
	* gas/mips/micromips-ill.s, gas/mips/micromips-ill.l: New test.
	* gas/mips/mips.exp: Run it.