;  ###----------------------------------------------------------------###
;  # file	: exc008.u						#
;  # date	: Mar 26 1996						#
;  # descr.	: functional test for mips				#
;  ###----------------------------------------------------------------###

	;  ###--------------------------------------------------------###
	;  #   exceptions :						#
	;  #     - illegal data address (segment when loading)		#
	;  ###--------------------------------------------------------###

adr		.equ	0xC000003c		; data adr in system segment
data		.equ	0x9043ad6b		; data

		.org	0x00400000
		.start	init

init:
		loadi	r31, back_from_exception
		loadi	r1 , adr		; word's address
		loadi	r2 , data		; init. r2 with a data
		loadi	r3 , data		; init. r3 with the same value

	;  ###--------------------------------------------------------###
	;  #   load a word at a miss segmented address (data address	#
	;  # segment exception)						#
	;  ###--------------------------------------------------------###

		lw	r2 , 0 (r1 )		; EXCEPTION (segment)

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

back_from_exception:
		                  		; check that the lw has failed
		beq	r2 ,r3, good		; jump to good if OK
		nop
		j	bad
		nop

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

		.end