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ae6b8730 RH |
1 | /* strcat (dest, src) -- Append SRC on the end of DEST. |
2 | For SPARC v9. | |
f7a9f785 | 3 | Copyright (C) 1998-2016 Free Software Foundation, Inc. |
ae6b8730 RH |
4 | This file is part of the GNU C Library. |
5 | Contributed by Jakub Jelinek <jj@ultra.linux.cz> and | |
6 | Jan Vondrak <jvon4518@ss1000.ms.mff.cuni.cz>. | |
7 | ||
8 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
9 | modify it under the terms of the GNU Lesser General Public |
10 | License as published by the Free Software Foundation; either | |
11 | version 2.1 of the License, or (at your option) any later version. | |
ae6b8730 RH |
12 | |
13 | The GNU C Library is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 16 | Lesser General Public License for more details. |
ae6b8730 | 17 | |
41bdb6e2 | 18 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
19 | License along with the GNU C Library; if not, see |
20 | <http://www.gnu.org/licenses/>. */ | |
ae6b8730 RH |
21 | |
22 | #include <sysdep.h> | |
23 | #include <asm/asi.h> | |
24 | #ifndef XCC | |
25 | #define XCC xcc | |
26 | #define USE_BPR | |
8cb079d4 UD |
27 | .register %g2, #scratch |
28 | .register %g3, #scratch | |
62f29da7 | 29 | .register %g6, #scratch |
ae6b8730 RH |
30 | #endif |
31 | ||
32 | /* Normally, this uses | |
33 | ((xword - 0x0101010101010101) & 0x8080808080808080) test | |
34 | to find out if any byte in xword could be zero. This is fast, but | |
35 | also gives false alarm for any byte in range 0x81-0xff. It does | |
36 | not matter for correctness, as if this test tells us there could | |
37 | be some zero byte, we check it byte by byte, but if bytes with | |
38 | high bits set are common in the strings, then this will give poor | |
39 | performance. You can #define EIGHTBIT_NOT_RARE and the algorithm | |
40 | will use one tick slower, but more precise test | |
41 | ((xword - 0x0101010101010101) & (~xword) & 0x8080808080808080), | |
42 | which does not give any false alarms (but if some bits are set, | |
43 | one cannot assume from it which bytes are zero and which are not). | |
44 | It is yet to be measured, what is the correct default for glibc | |
45 | in these days for an average user. | |
46 | */ | |
47 | ||
48 | .text | |
49 | .align 32 | |
50 | ENTRY(strcat) | |
51 | sethi %hi(0x01010101), %g1 /* IEU0 Group */ | |
52 | ldub [%o0], %o3 /* Load */ | |
53 | or %g1, %lo(0x01010101), %g1 /* IEU0 Group */ | |
62f29da7 | 54 | mov %o0, %g6 /* IEU1 */ |
ae6b8730 RH |
55 | |
56 | sllx %g1, 32, %g2 /* IEU0 Group */ | |
57 | andcc %o0, 7, %g0 /* IEU1 */ | |
58 | or %g1, %g2, %g1 /* IEU0 Group */ | |
59 | bne,pn %icc, 32f /* CTI */ | |
60 | ||
61 | sllx %g1, 7, %g2 /* IEU0 Group */ | |
62 | brz,pn %o3, 30f /* CTI+IEU1 */ | |
63 | ldx [%o0], %o3 /* Load */ | |
64 | 48: add %o0, 8, %o0 /* IEU0 Group */ | |
65 | ||
66 | 49: sub %o3, %g1, %o2 /* IEU0 Group */ | |
67 | #ifdef EIGHTBIT_NOT_RARE | |
68 | andn %o2, %o3, %g5 /* IEU0 Group */ | |
69 | ldxa [%o0] ASI_PNF, %o3 /* Load */ | |
70 | andcc %g5, %g2, %g0 /* IEU1 Group */ | |
71 | #else | |
72 | ldxa [%o0] ASI_PNF, %o3 /* Load */ | |
73 | andcc %o2, %g2, %g0 /* IEU1 Group */ | |
74 | #endif | |
75 | be,pt %xcc, 49b /* CTI */ | |
76 | ||
77 | add %o0, 8, %o0 /* IEU0 */ | |
78 | addcc %o2, %g1, %g3 /* IEU1 Group */ | |
79 | srlx %o2, 32, %o2 /* IEU0 */ | |
80 | 50: andcc %o2, %g2, %g0 /* IEU1 Group */ | |
81 | ||
82 | be,pn %xcc, 51f /* CTI */ | |
83 | srlx %g3, 56, %o2 /* IEU0 */ | |
84 | andcc %o2, 0xff, %g0 /* IEU1 Group */ | |
85 | be,pn %icc, 29f /* CTI */ | |
86 | ||
87 | srlx %g3, 48, %o2 /* IEU0 */ | |
88 | andcc %o2, 0xff, %g0 /* IEU1 Group */ | |
89 | be,pn %icc, 28f /* CTI */ | |
90 | srlx %g3, 40, %o2 /* IEU0 */ | |
91 | ||
92 | andcc %o2, 0xff, %g0 /* IEU1 Group */ | |
93 | be,pn %icc, 27f /* CTI */ | |
94 | srlx %g3, 32, %o2 /* IEU0 */ | |
95 | andcc %o2, 0xff, %g0 /* IEU1 Group */ | |
96 | ||
97 | be,pn %icc, 26f /* CTI */ | |
98 | 51: srlx %g3, 24, %o2 /* IEU0 */ | |
99 | andcc %o2, 0xff, %g0 /* IEU1 Group */ | |
100 | be,pn %icc, 25f /* CTI */ | |
101 | ||
102 | srlx %g3, 16, %o2 /* IEU0 */ | |
103 | andcc %o2, 0xff, %g0 /* IEU1 Group */ | |
104 | be,pn %icc, 24f /* CTI */ | |
105 | srlx %g3, 8, %o2 /* IEU0 */ | |
106 | ||
107 | andcc %o2, 0xff, %g0 /* IEU1 Group */ | |
108 | be,pn %icc, 23f /* CTI */ | |
109 | sub %o3, %g1, %o2 /* IEU0 */ | |
110 | andcc %g3, 0xff, %g0 /* IEU1 Group */ | |
111 | ||
112 | be,pn %icc, 52f /* CTI */ | |
113 | ldxa [%o0] ASI_PNF, %o3 /* Load */ | |
114 | andcc %o2, %g2, %g0 /* IEU1 Group */ | |
115 | be,pt %xcc, 49b /* CTI */ | |
116 | ||
117 | add %o0, 8, %o0 /* IEU0 */ | |
118 | addcc %o2, %g1, %g3 /* IEU1 Group */ | |
119 | ba,pt %xcc, 50b /* CTI */ | |
120 | srlx %o2, 32, %o2 /* IEU0 */ | |
121 | ||
122 | .align 16 | |
123 | 52: ba,pt %xcc, 12f /* CTI Group */ | |
124 | add %o0, -9, %o0 /* IEU0 */ | |
125 | 23: ba,pt %xcc, 12f /* CTI Group */ | |
126 | add %o0, -10, %o0 /* IEU0 */ | |
127 | ||
128 | 24: ba,pt %xcc, 12f /* CTI Group */ | |
129 | add %o0, -11, %o0 /* IEU0 */ | |
130 | 25: ba,pt %xcc, 12f /* CTI Group */ | |
131 | add %o0, -12, %o0 /* IEU0 */ | |
132 | ||
133 | 26: ba,pt %xcc, 12f /* CTI Group */ | |
134 | add %o0, -13, %o0 /* IEU0 */ | |
135 | 27: ba,pt %xcc, 12f /* CTI Group */ | |
136 | add %o0, -14, %o0 /* IEU0 */ | |
137 | ||
138 | 28: ba,pt %xcc, 12f /* CTI Group */ | |
139 | add %o0, -15, %o0 /* IEU0 */ | |
140 | 29: add %o0, -16, %o0 /* IEU0 Group */ | |
141 | 30: andcc %o1, 7, %g3 /* IEU1 */ | |
142 | ||
143 | 31: bne,pn %icc, 14f /* CTI */ | |
144 | orcc %g0, 64, %g4 /* IEU1 Group */ | |
145 | 1: ldx [%o1], %o3 /* Load */ | |
146 | add %o1, 8, %o1 /* IEU1 */ | |
147 | ||
148 | 2: mov %o3, %g3 /* IEU0 Group */ | |
149 | 3: sub %o3, %g1, %o2 /* IEU1 */ | |
150 | ldxa [%o1] ASI_PNF, %o3 /* Load */ | |
151 | #ifdef EIGHTBIT_NOT_RARE | |
152 | andn %o2, %g3, %o2 /* IEU0 Group */ | |
153 | #endif | |
154 | add %o0, 8, %o0 /* IEU0 Group */ | |
155 | ||
156 | andcc %o2, %g2, %g0 /* IEU1 */ | |
157 | add %o1, 8, %o1 /* IEU0 Group */ | |
158 | be,a,pt %xcc, 2b /* CTI */ | |
159 | stx %g3, [%o0 - 8] /* Store */ | |
160 | ||
161 | srlx %g3, 56, %g5 /* IEU0 Group */ | |
162 | andcc %g5, 0xff, %g0 /* IEU1 Group */ | |
163 | be,pn %icc, 11f /* CTI */ | |
164 | srlx %g3, 48, %g4 /* IEU0 */ | |
165 | ||
166 | andcc %g4, 0xff, %g0 /* IEU1 Group */ | |
167 | be,pn %icc, 10f /* CTI */ | |
168 | srlx %g3, 40, %g5 /* IEU0 */ | |
169 | andcc %g5, 0xff, %g0 /* IEU1 Group */ | |
170 | ||
171 | be,pn %icc, 9f /* CTI */ | |
172 | srlx %g3, 32, %g4 /* IEU0 */ | |
173 | andcc %g4, 0xff, %g0 /* IEU1 Group */ | |
174 | be,pn %icc, 8f /* CTI */ | |
175 | ||
176 | srlx %g3, 24, %g5 /* IEU0 */ | |
177 | andcc %g5, 0xff, %g0 /* IEU1 Group */ | |
178 | be,pn %icc, 7f /* CTI */ | |
179 | srlx %g3, 16, %g4 /* IEU0 */ | |
180 | ||
181 | andcc %g4, 0xff, %g0 /* IEU1 Group */ | |
182 | be,pn %icc, 6f /* CTI */ | |
183 | srlx %g3, 8, %g5 /* IEU0 */ | |
184 | andcc %g5, 0xff, %g0 /* IEU1 Group */ | |
185 | ||
186 | be,pn %icc, 5f /* CTI */ | |
187 | sub %o3, %g1, %o2 /* IEU0 */ | |
188 | stx %g3, [%o0 - 8] /* Store Group */ | |
189 | andcc %g3, 0xff, %g0 /* IEU1 */ | |
190 | ||
191 | bne,pt %icc, 3b /* CTI */ | |
192 | mov %o3, %g3 /* IEU0 Group */ | |
193 | 4: retl /* CTI+IEU1 Group */ | |
62f29da7 | 194 | mov %g6, %o0 /* IEU0 */ |
ae6b8730 RH |
195 | |
196 | .align 16 | |
197 | 5: stb %g5, [%o0 - 2] /* Store Group */ | |
198 | srlx %g3, 16, %g4 /* IEU0 */ | |
199 | 6: sth %g4, [%o0 - 4] /* Store Group */ | |
200 | srlx %g3, 32, %g4 /* IEU0 */ | |
201 | ||
202 | stw %g4, [%o0 - 8] /* Store Group */ | |
203 | retl /* CTI+IEU1 Group */ | |
62f29da7 | 204 | mov %g6, %o0 /* IEU0 */ |
ae6b8730 RH |
205 | 7: stb %g5, [%o0 - 4] /* Store Group */ |
206 | ||
207 | srlx %g3, 32, %g4 /* IEU0 */ | |
208 | 8: stw %g4, [%o0 - 8] /* Store Group */ | |
209 | retl /* CTI+IEU1 Group */ | |
62f29da7 | 210 | mov %g6, %o0 /* IEU0 */ |
ae6b8730 RH |
211 | |
212 | 9: stb %g5, [%o0 - 6] /* Store Group */ | |
213 | srlx %g3, 48, %g4 /* IEU0 */ | |
214 | 10: sth %g4, [%o0 - 8] /* Store Group */ | |
215 | retl /* CTI+IEU1 Group */ | |
216 | ||
62f29da7 | 217 | mov %g6, %o0 /* IEU0 */ |
ae6b8730 RH |
218 | 11: stb %g5, [%o0 - 8] /* Store Group */ |
219 | retl /* CTI+IEU1 Group */ | |
62f29da7 | 220 | mov %g6, %o0 /* IEU0 */ |
ae6b8730 RH |
221 | |
222 | .align 16 | |
223 | 32: andcc %o0, 7, %g0 /* IEU1 Group */ | |
224 | be,a,pn %icc, 48b /* CTI */ | |
225 | ldx [%o0], %o3 /* Load */ | |
226 | add %o0, 1, %o0 /* IEU0 Group */ | |
227 | ||
228 | brnz,a,pt %o3, 32b /* CTI+IEU1 */ | |
229 | lduba [%o0] ASI_PNF, %o3 /* Load */ | |
230 | add %o0, -1, %o0 /* IEU0 Group */ | |
231 | andcc %o0, 7, %g0 /* IEU1 Group */ | |
232 | ||
233 | be,a,pn %icc, 31b /* CTI */ | |
234 | andcc %o1, 7, %g3 /* IEU1 Group */ | |
235 | 12: ldub [%o1], %o3 /* Load */ | |
236 | stb %o3, [%o0] /* Store Group */ | |
237 | ||
238 | 13: add %o0, 1, %o0 /* IEU0 */ | |
239 | add %o1, 1, %o1 /* IEU1 */ | |
240 | andcc %o3, 0xff, %g0 /* IEU1 Group */ | |
241 | be,pn %icc, 4b /* CTI */ | |
242 | ||
243 | lduba [%o1] ASI_PNF, %o3 /* Load */ | |
244 | andcc %o0, 7, %g0 /* IEU1 Group */ | |
245 | bne,a,pt %icc, 13b /* CTI */ | |
246 | stb %o3, [%o0] /* Store */ | |
247 | ||
248 | andcc %o1, 7, %g3 /* IEU1 Group */ | |
249 | be,a,pt %icc, 1b /* CTI */ | |
250 | ldx [%o1], %o3 /* Load */ | |
251 | orcc %g0, 64, %g4 /* IEU1 Group */ | |
252 | ||
253 | 14: sllx %g3, 3, %g5 /* IEU0 */ | |
254 | sub %o1, %g3, %o1 /* IEU0 Group */ | |
255 | sub %g4, %g5, %g4 /* IEU1 */ | |
256 | /* %g1 = 0101010101010101 * | |
257 | * %g2 = 8080808080808080 * | |
258 | * %g3 = source alignment * | |
259 | * %g5 = number of bits to shift left * | |
260 | * %g4 = number of bits to shift right */ | |
261 | ldxa [%o1] ASI_PNF, %o5 /* Load Group */ | |
262 | ||
263 | addcc %o1, 8, %o1 /* IEU1 */ | |
264 | 15: sllx %o5, %g5, %o3 /* IEU0 Group */ | |
265 | ldxa [%o1] ASI_PNF, %o5 /* Load */ | |
266 | srlx %o5, %g4, %o4 /* IEU0 Group */ | |
267 | ||
268 | add %o0, 8, %o0 /* IEU1 */ | |
269 | or %o3, %o4, %o3 /* IEU0 Group */ | |
270 | add %o1, 8, %o1 /* IEU1 */ | |
271 | sub %o3, %g1, %o4 /* IEU0 Group */ | |
272 | ||
273 | #ifdef EIGHTBIT_NOT_RARE | |
274 | andn %o4, %o3, %o4 /* IEU0 Group */ | |
275 | #endif | |
276 | andcc %o4, %g2, %g0 /* IEU1 Group */ | |
277 | be,a,pt %xcc, 15b /* CTI */ | |
278 | stx %o3, [%o0 - 8] /* Store */ | |
279 | srlx %o3, 56, %o4 /* IEU0 Group */ | |
280 | ||
281 | andcc %o4, 0xff, %g0 /* IEU1 Group */ | |
282 | be,pn %icc, 22f /* CTI */ | |
283 | srlx %o3, 48, %o4 /* IEU0 */ | |
284 | andcc %o4, 0xff, %g0 /* IEU1 Group */ | |
285 | ||
286 | be,pn %icc, 21f /* CTI */ | |
287 | srlx %o3, 40, %o4 /* IEU0 */ | |
288 | andcc %o4, 0xff, %g0 /* IEU1 Group */ | |
289 | be,pn %icc, 20f /* CTI */ | |
290 | ||
291 | srlx %o3, 32, %o4 /* IEU0 */ | |
292 | andcc %o4, 0xff, %g0 /* IEU1 Group */ | |
293 | be,pn %icc, 19f /* CTI */ | |
294 | srlx %o3, 24, %o4 /* IEU0 */ | |
295 | ||
296 | andcc %o4, 0xff, %g0 /* IEU1 Group */ | |
297 | be,pn %icc, 18f /* CTI */ | |
298 | srlx %o3, 16, %o4 /* IEU0 */ | |
299 | andcc %o4, 0xff, %g0 /* IEU1 Group */ | |
300 | ||
301 | be,pn %icc, 17f /* CTI */ | |
302 | srlx %o3, 8, %o4 /* IEU0 */ | |
303 | andcc %o4, 0xff, %g0 /* IEU1 Group */ | |
304 | be,pn %icc, 16f /* CTI */ | |
305 | ||
306 | andcc %o3, 0xff, %g0 /* IEU1 Group */ | |
307 | bne,pn %icc, 15b /* CTI */ | |
308 | stx %o3, [%o0 - 8] /* Store */ | |
309 | retl /* CTI+IEU1 Group */ | |
310 | ||
62f29da7 | 311 | mov %g6, %o0 /* IEU0 */ |
ae6b8730 RH |
312 | |
313 | .align 16 | |
314 | 16: srlx %o3, 8, %o4 /* IEU0 Group */ | |
315 | stb %o4, [%o0 - 2] /* Store */ | |
316 | 17: srlx %o3, 16, %o4 /* IEU0 Group */ | |
317 | stb %o4, [%o0 - 3] /* Store */ | |
318 | ||
319 | 18: srlx %o3, 24, %o4 /* IEU0 Group */ | |
320 | stb %o4, [%o0 - 4] /* Store */ | |
321 | 19: srlx %o3, 32, %o4 /* IEU0 Group */ | |
322 | stw %o4, [%o0 - 8] /* Store */ | |
323 | ||
324 | retl /* CTI+IEU1 Group */ | |
62f29da7 | 325 | mov %g6, %o0 /* IEU0 */ |
ae6b8730 RH |
326 | nop |
327 | nop | |
328 | ||
329 | 20: srlx %o3, 40, %o4 /* IEU0 Group */ | |
330 | stb %o4, [%o0 - 6] /* Store */ | |
331 | 21: srlx %o3, 48, %o4 /* IEU0 Group */ | |
332 | stb %o4, [%o0 - 7] /* Store */ | |
333 | ||
334 | 22: srlx %o3, 56, %o4 /* IEU0 Group */ | |
335 | stb %o4, [%o0 - 8] /* Store */ | |
336 | retl /* CTI+IEU1 Group */ | |
62f29da7 | 337 | mov %g6, %o0 /* IEU0 */ |
ae6b8730 | 338 | END(strcat) |
85dd1003 | 339 | libc_hidden_builtin_def (strcat) |