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review.evervolv.com / android_kernel_htc_msm8960 / 52e5c1cec89879bd64eb4e681b4cb1525eabb472 / . / arch / sparc / lib / divdi3.S
blob: 681b3683da9e6134d065d8d719a691738f01653d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/* 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
20 .data
21 .align 8
22 .globl __clz_tab
23__clz_tab:
24 .byte 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5
25 .byte 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6
26 .byte 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
27 .byte 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
28 .byte 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
29 .byte 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
30 .byte 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
31 .byte 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
32 .size __clz_tab,256
33 .global .udiv
34
35 .text
36 .align 4
37 .globl __divdi3
38__divdi3:
39 save %sp,-104,%sp
40 cmp %i0,0
41 bge .LL40
42 mov 0,%l4
43 mov -1,%l4
44 sub %g0,%i1,%o0
45 mov %o0,%o5
46 subcc %g0,%o0,%g0
47 sub %g0,%i0,%o0
48 subx %o0,0,%o4
49 mov %o4,%i0
50 mov %o5,%i1
51.LL40:
52 cmp %i2,0
53 bge .LL84
54 mov %i3,%o4
55 xnor %g0,%l4,%l4
56 sub %g0,%i3,%o0
57 mov %o0,%o3
58 subcc %g0,%o0,%g0
59 sub %g0,%i2,%o0
60 subx %o0,0,%o2
61 mov %o2,%i2
62 mov %o3,%i3
63 mov %i3,%o4
64.LL84:
65 cmp %i2,0
66 bne .LL45
67 mov %i1,%i3
68 cmp %o4,%i0
69 bleu .LL46
70 mov %i3,%o1
71 mov 32,%g1
72 subcc %i0,%o4,%g0
731: bcs 5f
74 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
75 sub %i0,%o4,%i0 ! this kills msb of n
76 addx %i0,%i0,%i0 ! so this cannot give carry
77 subcc %g1,1,%g1
782: bne 1b
79 subcc %i0,%o4,%g0
80 bcs 3f
81 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
82 b 3f
83 sub %i0,%o4,%i0 ! this kills msb of n
844: sub %i0,%o4,%i0
855: addxcc %i0,%i0,%i0
86 bcc 2b
87 subcc %g1,1,%g1
88! Got carry from n. Subtract next step to cancel this carry.
89 bne 4b
90 addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb
91 sub %i0,%o4,%i0
923: xnor %o1,0,%o1
93 b .LL50
94 mov 0,%o2
95.LL46:
96 cmp %o4,0
97 bne .LL85
98 mov %i0,%o2
99 mov 1,%o0
100 call .udiv,0
101 mov 0,%o1
102 mov %o0,%o4
103 mov %i0,%o2
104.LL85:
105 mov 0,%g3
106 mov 32,%g1
107 subcc %g3,%o4,%g0
1081: bcs 5f
109 addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb
110 sub %g3,%o4,%g3 ! this kills msb of n
111 addx %g3,%g3,%g3 ! so this cannot give carry
112 subcc %g1,1,%g1
1132: bne 1b
114 subcc %g3,%o4,%g0
115 bcs 3f
116 addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb
117 b 3f
118 sub %g3,%o4,%g3 ! this kills msb of n
1194: sub %g3,%o4,%g3
1205: addxcc %g3,%g3,%g3
121 bcc 2b
122 subcc %g1,1,%g1
123! Got carry from n. Subtract next step to cancel this carry.
124 bne 4b
125 addcc %o2,%o2,%o2 ! shift n1n0 and a 0-bit in lsb
126 sub %g3,%o4,%g3
1273: xnor %o2,0,%o2
128 mov %g3,%i0
129 mov %i3,%o1
130 mov 32,%g1
131 subcc %i0,%o4,%g0
1321: bcs 5f
133 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
134 sub %i0,%o4,%i0 ! this kills msb of n
135 addx %i0,%i0,%i0 ! so this cannot give carry
136 subcc %g1,1,%g1
1372: bne 1b
138 subcc %i0,%o4,%g0
139 bcs 3f
140 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
141 b 3f
142 sub %i0,%o4,%i0 ! this kills msb of n
1434: sub %i0,%o4,%i0
1445: addxcc %i0,%i0,%i0
145 bcc 2b
146 subcc %g1,1,%g1
147! Got carry from n. Subtract next step to cancel this carry.
148 bne 4b
149 addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb
150 sub %i0,%o4,%i0
1513: xnor %o1,0,%o1
152 b .LL86
153 mov %o1,%l1
154.LL45:
155 cmp %i2,%i0
156 bleu .LL51
157 sethi %hi(65535),%o0
158 b .LL78
159 mov 0,%o1
160.LL51:
161 or %o0,%lo(65535),%o0
162 cmp %i2,%o0
163 bgu .LL58
164 mov %i2,%o1
165 cmp %i2,256
166 addx %g0,-1,%o0
167 b .LL64
168 and %o0,8,%o2
169.LL58:
170 sethi %hi(16777215),%o0
171 or %o0,%lo(16777215),%o0
172 cmp %i2,%o0
173 bgu .LL64
174 mov 24,%o2
175 mov 16,%o2
176.LL64:
177 srl %o1,%o2,%o0
178 sethi %hi(__clz_tab),%o1
179 or %o1,%lo(__clz_tab),%o1
180 ldub [%o0+%o1],%o0
181 add %o0,%o2,%o0
182 mov 32,%o1
183 subcc %o1,%o0,%o3
184 bne,a .LL72
185 sub %o1,%o3,%o1
186 cmp %i0,%i2
187 bgu .LL74
188 cmp %i3,%o4
189 blu .LL78
190 mov 0,%o1
191.LL74:
192 b .LL78
193 mov 1,%o1
194.LL72:
195 sll %i2,%o3,%o2
196 srl %o4,%o1,%o0
197 or %o2,%o0,%i2
198 sll %o4,%o3,%o4
199 srl %i0,%o1,%o2
200 sll %i0,%o3,%o0
201 srl %i3,%o1,%o1
202 or %o0,%o1,%i0
203 sll %i3,%o3,%i3
204 mov %i0,%o1
205 mov 32,%g1
206 subcc %o2,%i2,%g0
2071: bcs 5f
208 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
209 sub %o2,%i2,%o2 ! this kills msb of n
210 addx %o2,%o2,%o2 ! so this cannot give carry
211 subcc %g1,1,%g1
2122: bne 1b
213 subcc %o2,%i2,%g0
214 bcs 3f
215 addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
216 b 3f
217 sub %o2,%i2,%o2 ! this kills msb of n
2184: sub %o2,%i2,%o2
2195: addxcc %o2,%o2,%o2
220 bcc 2b
221 subcc %g1,1,%g1
222! Got carry from n. Subtract next step to cancel this carry.
223 bne 4b
224 addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb
225 sub %o2,%i2,%o2
2263: xnor %o1,0,%o1
227 mov %o2,%i0
228 wr %g0,%o1,%y ! SPARC has 0-3 delay insn after a wr
229 sra %o4,31,%g2 ! Do not move this insn
230 and %o1,%g2,%g2 ! Do not move this insn
231 andcc %g0,0,%g1 ! Do not move this insn
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,%o4,%g1
252 mulscc %g1,%o4,%g1
253 mulscc %g1,%o4,%g1
254 mulscc %g1,%o4,%g1
255 mulscc %g1,%o4,%g1
256 mulscc %g1,%o4,%g1
257 mulscc %g1,%o4,%g1
258 mulscc %g1,%o4,%g1
259 mulscc %g1,%o4,%g1
260 mulscc %g1,%o4,%g1
261 mulscc %g1,%o4,%g1
262 mulscc %g1,%o4,%g1
263 mulscc %g1,%o4,%g1
264 mulscc %g1,0,%g1
265 add %g1,%g2,%o0
266 rd %y,%o2
267 cmp %o0,%i0
268 bgu,a .LL78
269 add %o1,-1,%o1
270 bne,a .LL50
271 mov 0,%o2
272 cmp %o2,%i3
273 bleu .LL50
274 mov 0,%o2
275 add %o1,-1,%o1
276.LL78:
277 mov 0,%o2
278.LL50:
279 mov %o1,%l1
280.LL86:
281 mov %o2,%l0
282 mov %l0,%i0
283 mov %l1,%i1
284 cmp %l4,0
285 be .LL81
286 sub %g0,%i1,%o0
287 mov %o0,%l3
288 subcc %g0,%o0,%g0
289 sub %g0,%i0,%o0
290 subx %o0,0,%l2
291 mov %l2,%i0
292 mov %l3,%i1
293.LL81:
294 ret
295 restore