gas/

gas/
	* config/bfin-parse.y (check_macfunc_option): Allow (IU)
	option for multiply and multiply-accumulate to data register
	instruction.
	(check_macfuncs): Don't check if accumulator matches the data register
	here.
	(assign_macfunc): Check if accumulator matches the
	data register in each rule that moves to the data
	register.

gas/testsuite/
	* gas/bfin/arithmetic.s, gas/bfin/arithmetic.d: Add check
	for IU option.
	* gas/bfin/expected_errors.l, gas/bfin/expected_errors.s:
	Add check for mismatch of accumulator and data register.

opcodes/
	* bfin-dis.c (decode_dsp32mac_0): Decode (IU) option for
	multiply and multiply-accumulate to data register instruction.