* mips/mips.igen (check_op_hilo,check_mult_hilo,check_div_hilo):

	* mips/mips.igen (check_op_hilo,check_mult_hilo,check_div_hilo):
	Replace check_op_hilo with check_mult_hilo and check_div_hilo.
	Add special r3900 version of do_mult_hilo.
	(do_dmultx,do_mult,do_multu): Replace calls to check_op_hilo
	with calls to check_mult_hilo.
	(do_ddiv,do_ddivu,do_div,do_divu): Replace calls to check_op_hilo
	with calls to check_div_hilo.