| blob | a2b5a976be33612cce76a5b76c531b5bd1f06adb |
1 /* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
3 This file is part of GNU CC.
5 GNU CC is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
8 any later version.
10 GNU CC is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNU CC; see the file COPYING. If not, write to
17 the Free Software Foundation, 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <asm/export.h>
21 .text
22 .align 4
23 .globl __divdi3
24 __divdi3:
25 save %sp,-104,%sp
26 cmp %i0,0
27 bge .LL40
28 mov 0,%l4
29 mov -1,%l4
30 sub %g0,%i1,%o0
31 mov %o0,%o5
32 subcc %g0,%o0,%g0
33 sub %g0,%i0,%o0
34 subx %o0,0,%o4
35 mov %o4,%i0
36 mov %o5,%i1
37 .LL40:
38 cmp %i2,0
39 bge .LL84
40 mov %i3,%o4
41 xnor %g0,%l4,%l4
42 sub %g0,%i3,%o0
43 mov %o0,%o3
44 subcc %g0,%o0,%g0
45 sub %g0,%i2,%o0
46 subx %o0,0,%o2
47 mov %o2,%i2
48 mov %o3,%i3
49 mov %i3,%o4
50 .LL84:
51 cmp %i2,0
52 bne .LL45
53 mov %i1,%i3
54 cmp %o4,%i0
55 bleu .LL46
56 mov %i3,%o1
57 mov 32,%g1
58 subcc %i0,%o4,%g0
59 1: bcs 5f
60 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
61 sub %i0,%o4,%i0 ! this kills msb of n
62 addx %i0,%i0,%i0 ! so this cannot give carry
63 subcc %g1,1,%g1
64 2: bne 1b
65 subcc %i0,%o4,%g0
66 bcs 3f
67 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
68 b 3f
69 sub %i0,%o4,%i0 ! this kills msb of n
70 4: sub %i0,%o4,%i0
71 5: addxcc %i0,%i0,%i0
72 bcc 2b
73 subcc %g1,1,%g1
74 ! Got carry from n. Subtract next step to cancel this carry.
75 bne 4b
76 addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb
77 sub %i0,%o4,%i0
78 3: xnor %o1,0,%o1
79 b .LL50
80 mov 0,%o2
81 .LL46:
82 cmp %o4,0
83 bne .LL85
84 mov %i0,%o2
85 mov 1,%o0
86 mov 0,%o1
87 wr %g0, 0, %y
88 udiv %o0, %o1, %o0
89 mov %o0,%o4
90 mov %i0,%o2
91 .LL85:
92 mov 0,%g3
93 mov 32,%g1
94 subcc %g3,%o4,%g0
95 1: bcs 5f
96 addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb
97 sub %g3,%o4,%g3 ! this kills msb of n
98 addx %g3,%g3,%g3 ! so this cannot give carry
99 subcc %g1,1,%g1
100 2: bne 1b
101 subcc %g3,%o4,%g0
102 bcs 3f
103 addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb
104 b 3f
105 sub %g3,%o4,%g3 ! this kills msb of n
106 4: sub %g3,%o4,%g3
107 5: addxcc %g3,%g3,%g3
108 bcc 2b
109 subcc %g1,1,%g1
110 ! Got carry from n. Subtract next step to cancel this carry.
111 bne 4b
112 addcc %o2,%o2,%o2 ! shift n1n0 and a 0-bit in lsb
113 sub %g3,%o4,%g3
114 3: xnor %o2,0,%o2
115 mov %g3,%i0
116 mov %i3,%o1
117 mov 32,%g1
118 subcc %i0,%o4,%g0
119 1: bcs 5f
120 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
121 sub %i0,%o4,%i0 ! this kills msb of n
122 addx %i0,%i0,%i0 ! so this cannot give carry
123 subcc %g1,1,%g1
124 2: bne 1b
125 subcc %i0,%o4,%g0
126 bcs 3f
127 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
128 b 3f
129 sub %i0,%o4,%i0 ! this kills msb of n
130 4: sub %i0,%o4,%i0
131 5: addxcc %i0,%i0,%i0
132 bcc 2b
133 subcc %g1,1,%g1
134 ! Got carry from n. Subtract next step to cancel this carry.
135 bne 4b
136 addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb
137 sub %i0,%o4,%i0
138 3: xnor %o1,0,%o1
139 b .LL86
140 mov %o1,%l1
141 .LL45:
142 cmp %i2,%i0
143 bleu .LL51
144 sethi %hi(65535),%o0
145 b .LL78
146 mov 0,%o1
147 .LL51:
148 or %o0,%lo(65535),%o0
149 cmp %i2,%o0
150 bgu .LL58
151 mov %i2,%o1
152 cmp %i2,256
153 addx %g0,-1,%o0
154 b .LL64
155 and %o0,8,%o2
156 .LL58:
157 sethi %hi(16777215),%o0
158 or %o0,%lo(16777215),%o0
159 cmp %i2,%o0
160 bgu .LL64
161 mov 24,%o2
162 mov 16,%o2
163 .LL64:
164 srl %o1,%o2,%o0
165 sethi %hi(__clz_tab),%o1
166 or %o1,%lo(__clz_tab),%o1
167 ldub [%o0+%o1],%o0
168 add %o0,%o2,%o0
169 mov 32,%o1
170 subcc %o1,%o0,%o3
171 bne,a .LL72
172 sub %o1,%o3,%o1
173 cmp %i0,%i2
174 bgu .LL74
175 cmp %i3,%o4
176 blu .LL78
177 mov 0,%o1
178 .LL74:
179 b .LL78
180 mov 1,%o1
181 .LL72:
182 sll %i2,%o3,%o2
183 srl %o4,%o1,%o0
184 or %o2,%o0,%i2
185 sll %o4,%o3,%o4
186 srl %i0,%o1,%o2
187 sll %i0,%o3,%o0
188 srl %i3,%o1,%o1
189 or %o0,%o1,%i0
190 sll %i3,%o3,%i3
191 mov %i0,%o1
192 mov 32,%g1
193 subcc %o2,%i2,%g0
194 1: bcs 5f
195 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
196 sub %o2,%i2,%o2 ! this kills msb of n
197 addx %o2,%o2,%o2 ! so this cannot give carry
198 subcc %g1,1,%g1
199 2: bne 1b
200 subcc %o2,%i2,%g0
201 bcs 3f
202 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
203 b 3f
204 sub %o2,%i2,%o2 ! this kills msb of n
205 4: sub %o2,%i2,%o2
206 5: addxcc %o2,%o2,%o2
207 bcc 2b
208 subcc %g1,1,%g1
209 ! Got carry from n. Subtract next step to cancel this carry.
210 bne 4b
211 addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb
212 sub %o2,%i2,%o2
213 3: xnor %o1,0,%o1
214 mov %o2,%i0
215 wr %g0,%o1,%y ! SPARC has 0-3 delay insn after a wr
216 sra %o4,31,%g2 ! Do not move this insn
217 and %o1,%g2,%g2 ! Do not move this insn
218 andcc %g0,0,%g1 ! Do not move this insn
219 mulscc %g1,%o4,%g1
220 mulscc %g1,%o4,%g1
221 mulscc %g1,%o4,%g1
222 mulscc %g1,%o4,%g1
223 mulscc %g1,%o4,%g1
224 mulscc %g1,%o4,%g1
225 mulscc %g1,%o4,%g1
226 mulscc %g1,%o4,%g1
227 mulscc %g1,%o4,%g1
228 mulscc %g1,%o4,%g1
229 mulscc %g1,%o4,%g1
230 mulscc %g1,%o4,%g1
231 mulscc %g1,%o4,%g1
232 mulscc %g1,%o4,%g1
233 mulscc %g1,%o4,%g1
234 mulscc %g1,%o4,%g1
235 mulscc %g1,%o4,%g1
236 mulscc %g1,%o4,%g1
237 mulscc %g1,%o4,%g1
238 mulscc %g1,%o4,%g1
239 mulscc %g1,%o4,%g1
240 mulscc %g1,%o4,%g1
241 mulscc %g1,%o4,%g1
242 mulscc %g1,%o4,%g1
243 mulscc %g1,%o4,%g1
244 mulscc %g1,%o4,%g1
245 mulscc %g1,%o4,%g1
246 mulscc %g1,%o4,%g1
247 mulscc %g1,%o4,%g1
248 mulscc %g1,%o4,%g1
249 mulscc %g1,%o4,%g1
250 mulscc %g1,%o4,%g1
251 mulscc %g1,0,%g1
252 add %g1,%g2,%o0
253 rd %y,%o2
254 cmp %o0,%i0
255 bgu,a .LL78
256 add %o1,-1,%o1
257 bne,a .LL50
258 mov 0,%o2
259 cmp %o2,%i3
260 bleu .LL50
261 mov 0,%o2
262 add %o1,-1,%o1
263 .LL78:
264 mov 0,%o2
265 .LL50:
266 mov %o1,%l1
267 .LL86:
268 mov %o2,%l0
269 mov %l0,%i0
270 mov %l1,%i1
271 cmp %l4,0
272 be .LL81
273 sub %g0,%i1,%o0
274 mov %o0,%l3
275 subcc %g0,%o0,%g0
276 sub %g0,%i0,%o0
277 subx %o0,0,%l2
278 mov %l2,%i0
279 mov %l3,%i1
280 .LL81:
281 ret
282 restore
283 EXPORT_SYMBOL(__divdi3)