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7 # M68000 Hi-Performance Microprocessor Division
822 	mov.l		0xc(%sp),-(%sp)		# move voff,hi(pc)
826 	mov.l		(%sp)+,0x4(%sp)		# store voff,hi(pc)
843 	mov.w		0xc(%sp),0x4(%sp)	# store hi(pc)
1693 	bsr.l		_dmem_write_byte	# os  : write hi
1737 	bsr.l		_dmem_write_byte	# os  : write hi
1907 	mov.b		EXC_EXTWORD(%a6), %d0	# fetch hi extension word
1948 	mov.w		%d0, %d1		# place hi in %d1
1952 	ext.l		%d1			# sign extend hi bnd
1972 	mov.b		%d0, %d1		# place hi in %d1
1976 	extb.l		%d1			# sign extend hi bnd
1988 #	(2) save 'Z' and 'N' bits from ((hi - lo) - (Rn - hi))
1996 	sub.l		%d0, %d1		# (hi - lo)
1997 	cmp.l	 	%d1,%d2			# ((hi - lo) - (Rn - hi))
2118 	mov.l		(EXC_DREGS,%a6,%d0.w*4), %d5 # get dividend hi
2135 	tst.l		%d5			# chk sign of hi(dividend)
2145 #	- is (hi(dividend) == 0 && (divisor <= lo(dividend))) ? (32-bit div)
2147 	tst.l		%d5			# is (hi(dividend) == 0)
2166 # 	- is hi(dividend) >= divisor ? if yes, then overflow
2409 # returns 64 bit result in %d5 (hi) %d6(lo).
2412 # multiply hi,lo words of each factor to get 4 intermediate products
2574 # 	| hi(mplier) * hi(mplicand)|					#
2577 #		     | hi(mplier) * lo(mplicand) |			#
2580 #		     | lo(mplier) * hi(mplicand) |			#
2587 #	|	hi(result)	   |	    lo(result)         |	#
2595 	swap		%d6			# hi(mr) in lo %d6
2596 	swap		%d7			# hi(md) in lo %d7
2600 	mulu.w		%d6, %d4		# [2] hi(mr) * lo(md)
2601 	mulu.w		%d7, %d5		# [3] lo(mr) * hi(md)
2602 	mulu.w		%d7, %d6		# [4] hi(mr) * hi(md)
2604 # add lo portions of [2],[3] to hi portion of [1].
2608 	swap		%d3			# hi([1]) <==> lo([1])
2609 	add.w		%d4, %d3		# hi([1]) + lo([2])
2611 	add.w		%d5, %d3		# hi([1]) + lo([3])
2613 	swap		%d3			# lo([1]) <==> hi([1])
2616 # now, clear lo, put hi in lo reg, and add to [4]
2618 	clr.w		%d5			# clear hi([3])
2619 	swap		%d4			# hi([2]) in lo %d4
2620 	swap		%d5			# hi([3]) in lo %d5
2621 	add.l		%d5, %d4		#    [4]  + hi([2])
2622 	add.l		%d6, %d4		#    [4]  + hi([3])
2633 	not.l		%d4			# negate hi(result) bits
2635 	addx.l		%d7, %d4		# add carry to hi(result)
2638 # for '040 compatibility, if Dl == Dh then only the hi(result) is
2639 # saved. so, saving hi after lo accomplishes this without need to
2644 	mov.l		%d4, (EXC_DREGS,%a6,%d1.w*4) # save hi(result)
2664 	clr.l		(EXC_DREGS,%a6,%d1.w*4) # save hi(result)