gas/testsuite/gas/i386/x86-64-reg-bad.s - binutils-gdb - Git at Google

 # Check %axl / %cxl aren't permitted as accumulator / shift count

 	.text
 reg:
 	add	$1, %axl
 	div	%bl, %axl
 	in	%dx, %axl
 	lods	(%rsi), %axl
 	movabs	-1, %axl
 	shl	%cxl, %eax
 	test	$1, %axl
	# Check %axl / %cxl aren't permitted as accumulator / shift count

	.text
	reg:
	add $1, %axl
	div %bl, %axl
	in %dx, %axl
	lods (%rsi), %axl
	movabs -1, %axl
	shl %cxl, %eax
	test $1, %axl