udiv.cgs

这个是LINUX下的GDB调度工具的源码

# frv testcase for udiv $GRi,$GRj,$GRk
# mach: frv fr500 fr400

	.include "testutils.inc"

	start

	.global udiv
udiv:
	; simple division 12 / 3
	set_gr_immed   	0x00000003,gr2
	set_gr_immed   	0x0000000c,gr3
	udiv      	gr3,gr2,gr3
	test_gr_immed  	0x00000003,gr2
	test_gr_immed  	0x00000004,gr3

	; example 1 from udiv in the fr30 manual
	set_gr_limmed  	0x0123,0x4567,gr2
	set_gr_limmed  	0xfedc,0xba98,gr3
	udiv      	gr3,gr2,gr3
	test_gr_limmed 	0x0123,0x4567,gr2
	test_gr_immed  	0x000000e0,gr3

	; set up exception handler
	set_psr_et	1
	and_spr_immed	-4081,tbr	; clear tbr.tt
	set_gr_spr	tbr,gr17
	inc_gr_immed	0x170,gr17	; address of exception handler
	set_bctrlr_0_0  gr17
	set_spr_immed	128,lcr
	set_gr_immed	0,gr15

	; divide by zero
	set_spr_addr	ok1,lr
	set_gr_addr	e1,gr17
e1:	udiv      	gr1,gr0,gr2	; divide by zero
	test_gr_immed	1,gr15

	pass

ok1:	; exception handler for divide by zero
	test_spr_bits	0x18,3,0x1,isr		; isr.dtt is set
	test_spr_gr	epcr0,gr17		; return address set
	test_spr_bits	0x0001,0,0x1,esr0	; esr0 is valid
	test_spr_bits	0x003e,1,0x13,esr0	; esr0.ec is set
	inc_gr_immed	1,gr15
	rett		0
	fail