;  ###----------------------------------------------------------------###
;  # file	: exc009.u						#
;  # date	: Mar 26 1996						#
;  # descr.	: functional test for mips				#
;  ###----------------------------------------------------------------###

	;  ###--------------------------------------------------------###
	;  #   exceptions :						#
	;  #     - illegal instruction (when executing a mfc0)  	#
	;  ###--------------------------------------------------------###

data		.equ	0x324f6b71
		.org	0x00400000
		.start	init

init:
		loadi	r31, back_from_exception
		loadi	r1 , data		; init. r2 with a data
		loadi	r2 , data		; init. r3 with the same value

	;  ###--------------------------------------------------------###
	;  #   move SR into r1. This must generate an exception		#
	;  # (coprocesseur inaccessible)				#
	;  ###--------------------------------------------------------###

		mfc0	r1 , status		; EXCEPTION (privileged)
		nop

	;  ###--------------------------------------------------------###
	;  #   check that the load has faild and the content of the	#
	;  # register has not been altered				#
	;  ###--------------------------------------------------------###

back_from_exception:
		                   		; check that the move has failed
		beq	r1 , r2 ,good		; jump to good if OK
		nop
		j	bad
		nop

		.org	0x004000d0
good:		j	good
		nop
bad:		j	bad
		nop

		.end