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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
2
3This file is part of GNU CC.
4
5GNU CC is free software; you can redistribute it and/or modify
6it under the terms of the GNU General Public License as published by
7the Free Software Foundation; either version 2, or (at your option)
8any later version.
9
10GNU CC is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with GNU CC; see the file COPYING. If not, write to
17the Free Software Foundation, 59 Temple Place - Suite 330,
18Boston, MA 02111-1307, USA. */
19
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 .text
21 .align 4
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 .globl __divdi3
23__divdi3:
24 save %sp,-104,%sp
25 cmp %i0,0
26 bge .LL40
27 mov 0,%l4
28 mov -1,%l4
29 sub %g0,%i1,%o0
30 mov %o0,%o5
31 subcc %g0,%o0,%g0
32 sub %g0,%i0,%o0
33 subx %o0,0,%o4
34 mov %o4,%i0
35 mov %o5,%i1
36.LL40:
37 cmp %i2,0
38 bge .LL84
39 mov %i3,%o4
40 xnor %g0,%l4,%l4
41 sub %g0,%i3,%o0
42 mov %o0,%o3
43 subcc %g0,%o0,%g0
44 sub %g0,%i2,%o0
45 subx %o0,0,%o2
46 mov %o2,%i2
47 mov %o3,%i3
48 mov %i3,%o4
49.LL84:
50 cmp %i2,0
51 bne .LL45
52 mov %i1,%i3
53 cmp %o4,%i0
54 bleu .LL46
55 mov %i3,%o1
56 mov 32,%g1
57 subcc %i0,%o4,%g0
581: bcs 5f
59 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
60 sub %i0,%o4,%i0 ! this kills msb of n
61 addx %i0,%i0,%i0 ! so this cannot give carry
62 subcc %g1,1,%g1
632: bne 1b
64 subcc %i0,%o4,%g0
65 bcs 3f
66 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
67 b 3f
68 sub %i0,%o4,%i0 ! this kills msb of n
694: sub %i0,%o4,%i0
705: addxcc %i0,%i0,%i0
71 bcc 2b
72 subcc %g1,1,%g1
73! Got carry from n. Subtract next step to cancel this carry.
74 bne 4b
75 addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb
76 sub %i0,%o4,%i0
773: xnor %o1,0,%o1
78 b .LL50
79 mov 0,%o2
80.LL46:
81 cmp %o4,0
82 bne .LL85
83 mov %i0,%o2
84 mov 1,%o0
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 mov 0,%o1
David S. Miller1b35a572012-05-15 11:23:01 -070086 wr %g0, 0, %y
87 udiv %o0, %o1, %o0
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 mov %o0,%o4
89 mov %i0,%o2
90.LL85:
91 mov 0,%g3
92 mov 32,%g1
93 subcc %g3,%o4,%g0
941: bcs 5f
95 addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb
96 sub %g3,%o4,%g3 ! this kills msb of n
97 addx %g3,%g3,%g3 ! so this cannot give carry
98 subcc %g1,1,%g1
992: bne 1b
100 subcc %g3,%o4,%g0
101 bcs 3f
102 addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb
103 b 3f
104 sub %g3,%o4,%g3 ! this kills msb of n
1054: sub %g3,%o4,%g3
1065: addxcc %g3,%g3,%g3
107 bcc 2b
108 subcc %g1,1,%g1
109! Got carry from n. Subtract next step to cancel this carry.
110 bne 4b
111 addcc %o2,%o2,%o2 ! shift n1n0 and a 0-bit in lsb
112 sub %g3,%o4,%g3
1133: xnor %o2,0,%o2
114 mov %g3,%i0
115 mov %i3,%o1
116 mov 32,%g1
117 subcc %i0,%o4,%g0
1181: bcs 5f
119 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
120 sub %i0,%o4,%i0 ! this kills msb of n
121 addx %i0,%i0,%i0 ! so this cannot give carry
122 subcc %g1,1,%g1
1232: bne 1b
124 subcc %i0,%o4,%g0
125 bcs 3f
126 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
127 b 3f
128 sub %i0,%o4,%i0 ! this kills msb of n
1294: sub %i0,%o4,%i0
1305: addxcc %i0,%i0,%i0
131 bcc 2b
132 subcc %g1,1,%g1
133! Got carry from n. Subtract next step to cancel this carry.
134 bne 4b
135 addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb
136 sub %i0,%o4,%i0
1373: xnor %o1,0,%o1
138 b .LL86
139 mov %o1,%l1
140.LL45:
141 cmp %i2,%i0
142 bleu .LL51
143 sethi %hi(65535),%o0
144 b .LL78
145 mov 0,%o1
146.LL51:
147 or %o0,%lo(65535),%o0
148 cmp %i2,%o0
149 bgu .LL58
150 mov %i2,%o1
151 cmp %i2,256
152 addx %g0,-1,%o0
153 b .LL64
154 and %o0,8,%o2
155.LL58:
156 sethi %hi(16777215),%o0
157 or %o0,%lo(16777215),%o0
158 cmp %i2,%o0
159 bgu .LL64
160 mov 24,%o2
161 mov 16,%o2
162.LL64:
163 srl %o1,%o2,%o0
164 sethi %hi(__clz_tab),%o1
165 or %o1,%lo(__clz_tab),%o1
166 ldub [%o0+%o1],%o0
167 add %o0,%o2,%o0
168 mov 32,%o1
169 subcc %o1,%o0,%o3
170 bne,a .LL72
171 sub %o1,%o3,%o1
172 cmp %i0,%i2
173 bgu .LL74
174 cmp %i3,%o4
175 blu .LL78
176 mov 0,%o1
177.LL74:
178 b .LL78
179 mov 1,%o1
180.LL72:
181 sll %i2,%o3,%o2
182 srl %o4,%o1,%o0
183 or %o2,%o0,%i2
184 sll %o4,%o3,%o4
185 srl %i0,%o1,%o2
186 sll %i0,%o3,%o0
187 srl %i3,%o1,%o1
188 or %o0,%o1,%i0
189 sll %i3,%o3,%i3
190 mov %i0,%o1
191 mov 32,%g1
192 subcc %o2,%i2,%g0
1931: bcs 5f
194 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
195 sub %o2,%i2,%o2 ! this kills msb of n
196 addx %o2,%o2,%o2 ! so this cannot give carry
197 subcc %g1,1,%g1
1982: bne 1b
199 subcc %o2,%i2,%g0
200 bcs 3f
201 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
202 b 3f
203 sub %o2,%i2,%o2 ! this kills msb of n
2044: sub %o2,%i2,%o2
2055: addxcc %o2,%o2,%o2
206 bcc 2b
207 subcc %g1,1,%g1
208! Got carry from n. Subtract next step to cancel this carry.
209 bne 4b
210 addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb
211 sub %o2,%i2,%o2
2123: xnor %o1,0,%o1
213 mov %o2,%i0
214 wr %g0,%o1,%y ! SPARC has 0-3 delay insn after a wr
215 sra %o4,31,%g2 ! Do not move this insn
216 and %o1,%g2,%g2 ! Do not move this insn
217 andcc %g0,0,%g1 ! Do not move this insn
218 mulscc %g1,%o4,%g1
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 %g1,0,%g1
251 add %g1,%g2,%o0
252 rd %y,%o2
253 cmp %o0,%i0
254 bgu,a .LL78
255 add %o1,-1,%o1
256 bne,a .LL50
257 mov 0,%o2
258 cmp %o2,%i3
259 bleu .LL50
260 mov 0,%o2
261 add %o1,-1,%o1
262.LL78:
263 mov 0,%o2
264.LL50:
265 mov %o1,%l1
266.LL86:
267 mov %o2,%l0
268 mov %l0,%i0
269 mov %l1,%i1
270 cmp %l4,0
271 be .LL81
272 sub %g0,%i1,%o0
273 mov %o0,%l3
274 subcc %g0,%o0,%g0
275 sub %g0,%i0,%o0
276 subx %o0,0,%l2
277 mov %l2,%i0
278 mov %l3,%i1
279.LL81:
280 ret
281 restore