alpha/lib/ev6-divide.S

38  *	$1 - shifted divisor
53  *	E	- either cluster
66 #define divisor	$1
109 	subq	$30,STACK,$30		# E :
113 7:	stq	$1, 0($30)		# L :
114 	bis	$25,$25,divisor		# E :
117 	bis	$24,$24,modulus		# E :
119 	bis	$31,$31,quotient	# E :
120 	LONGIFY(divisor)		# E : U L L U
123 	LONGIFY(modulus)		# E :
124 	bis	$31,1,mask		# E :
131 	 * below ensures that label 1 is going to be nicely aligned
144 1:	cmpult	divisor,modulus,compare	# E :
145 	s8addq	divisor,$31,divisor	# E :
146 	s8addq	mask,$31,mask		# E :
147 	bne	compare,1b		# U : U L U L
149 1:	cmpult	divisor,modulus,compare	# E :
150 	nop				# E :
151 	nop				# E :
154 	addq	divisor,divisor,divisor	# E :
155 	addq	mask,mask,mask		# E :
156 	unop				# E :
157 	bne	compare,1b		# U : U L U L
167 	DIV_ONLY(addq quotient,mask,tmp2) # E :
169 	nop				# E :
171 	srl	mask,1,mask		# U :
172 	cmpule	divisor,modulus,compare	# E :
173 	subq	modulus,divisor,tmp1	# E :
176 	DIV_ONLY(cmovne compare,tmp2,quotient)	# E : Latency 2, extra map slot
177 	nop				# E : as part of the cmovne
178 	srl	divisor,1,divisor	# U :
179 	nop				# E : L U L U
181 	nop				# E :
182 	cmovne	compare,tmp1,modulus	# E : Latency 2, extra map slot
183 	nop				# E : as part of the cmovne
186 	srl	divisor,1,divisor	# U :
187 	cmovne	compare,tmp1,modulus	# E : Latency 2, extra map slot
188 	nop				# E : as part of the cmovne
192 9:	ldq	$1, 0($30)		# L :
194 	nop				# E :
195 	nop				# E : U U L L
199 	nop				# E :
200 	nop				# E :
205 	nop				# E :
207 	addq	$30,STACK,$30		# E :
208 	ret	$31,($23),1		# L0 : L U U L
226 	subq	$30,STACK,$30		# E :
229 	bis	$24,$25,$28		# E :
230 	SLONGIFY($28)			# E :
234 	subq	$31,$24,$28		# E :
236 	nop				# E : U L U L
238 	cmovlt	$24,$28,$24	/* abs($24) */ # E : Latency 2, extra map slot
239 	nop				# E : as part of the cmov
241 	subq	$31,$25,$28		# E : U L U L
244 	cmovlt	$25,$28,$25	/* abs($25) */ # E : Latency 2, extra map slot
245 	nop				# E :
250 	GETSIGN($28)			# E :
251 	subq	$31,$27,tmp1		# E : U U L L
253 	SLONGIFY($28)			# E :
255 	cmovlt	$28,tmp1,$27		# E : Latency 2, extra map slot
256 	nop				# E : U L L U : as part of the cmov
259 	nop				# E : as part of the cmov
260 	addq	$30,STACK,$30		# E :
261 	ret	$31,($23),1		# L0 : L U U L