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9#define IN_ARCH_STRING_C 1
10
11#include <linux/types.h>
12#include <linux/module.h>
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17static inline char *__strend(const char *s)
18{
19 register unsigned long r0 asm("0") = 0;
20
21 asm volatile ("0: srst %0,%1\n"
22 " jo 0b"
23 : "+d" (r0), "+a" (s) : : "cc" );
24 return (char *) r0;
25}
26
27static inline char *__strnend(const char *s, size_t n)
28{
29 register unsigned long r0 asm("0") = 0;
30 const char *p = s + n;
31
32 asm volatile ("0: srst %0,%1\n"
33 " jo 0b"
34 : "+d" (p), "+a" (s) : "d" (r0) : "cc" );
35 return (char *) p;
36}
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44size_t strlen(const char *s)
45{
46 return __strend(s) - s;
47}
48EXPORT_SYMBOL(strlen);
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57size_t strnlen(const char * s, size_t n)
58{
59 return __strnend(s, n) - s;
60}
61EXPORT_SYMBOL(strnlen);
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70char *strcpy(char *dest, const char *src)
71{
72 register int r0 asm("0") = 0;
73 char *ret = dest;
74
75 asm volatile ("0: mvst %0,%1\n"
76 " jo 0b"
77 : "+&a" (dest), "+&a" (src) : "d" (r0)
78 : "cc", "memory" );
79 return ret;
80}
81EXPORT_SYMBOL(strcpy);
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94size_t strlcpy(char *dest, const char *src, size_t size)
95{
96 size_t ret = __strend(src) - src;
97
98 if (size) {
99 size_t len = (ret >= size) ? size-1 : ret;
100 dest[len] = '\0';
101 memcpy(dest, src, len);
102 }
103 return ret;
104}
105EXPORT_SYMBOL(strlcpy);
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116char *strncpy(char *dest, const char *src, size_t n)
117{
118 size_t len = __strnend(src, n) - src;
119 memset(dest + len, 0, n - len);
120 memcpy(dest, src, len);
121 return dest;
122}
123EXPORT_SYMBOL(strncpy);
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132char *strcat(char *dest, const char *src)
133{
134 register int r0 asm("0") = 0;
135 unsigned long dummy;
136 char *ret = dest;
137
138 asm volatile ("0: srst %0,%1\n"
139 " jo 0b\n"
140 "1: mvst %0,%2\n"
141 " jo 1b"
142 : "=&a" (dummy), "+a" (dest), "+a" (src)
143 : "d" (r0), "0" (0UL) : "cc", "memory" );
144 return ret;
145}
146EXPORT_SYMBOL(strcat);
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153
154size_t strlcat(char *dest, const char *src, size_t n)
155{
156 size_t dsize = __strend(dest) - dest;
157 size_t len = __strend(src) - src;
158 size_t res = dsize + len;
159
160 if (dsize < n) {
161 dest += dsize;
162 n -= dsize;
163 if (len >= n)
164 len = n - 1;
165 dest[len] = '\0';
166 memcpy(dest, src, len);
167 }
168 return res;
169}
170EXPORT_SYMBOL(strlcat);
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182
183char *strncat(char *dest, const char *src, size_t n)
184{
185 size_t len = __strnend(src, n) - src;
186 char *p = __strend(dest);
187
188 p[len] = '\0';
189 memcpy(p, src, len);
190 return dest;
191}
192EXPORT_SYMBOL(strncat);
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203int strcmp(const char *cs, const char *ct)
204{
205 register int r0 asm("0") = 0;
206 int ret = 0;
207
208 asm volatile ("0: clst %2,%3\n"
209 " jo 0b\n"
210 " je 1f\n"
211 " ic %0,0(%2)\n"
212 " ic %1,0(%3)\n"
213 " sr %0,%1\n"
214 "1:"
215 : "+d" (ret), "+d" (r0), "+a" (cs), "+a" (ct)
216 : : "cc" );
217 return ret;
218}
219EXPORT_SYMBOL(strcmp);
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226char * strrchr(const char * s, int c)
227{
228 size_t len = __strend(s) - s;
229
230 if (len)
231 do {
232 if (s[len] == (char) c)
233 return (char *) s + len;
234 } while (--len > 0);
235 return NULL;
236}
237EXPORT_SYMBOL(strrchr);
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244char * strstr(const char * s1,const char * s2)
245{
246 int l1, l2;
247
248 l2 = __strend(s2) - s2;
249 if (!l2)
250 return (char *) s1;
251 l1 = __strend(s1) - s1;
252 while (l1-- >= l2) {
253 register unsigned long r2 asm("2") = (unsigned long) s1;
254 register unsigned long r3 asm("3") = (unsigned long) l2;
255 register unsigned long r4 asm("4") = (unsigned long) s2;
256 register unsigned long r5 asm("5") = (unsigned long) l2;
257 int cc;
258
259 asm volatile ("0: clcle %1,%3,0\n"
260 " jo 0b\n"
261 " ipm %0\n"
262 " srl %0,28"
263 : "=&d" (cc), "+a" (r2), "+a" (r3),
264 "+a" (r4), "+a" (r5) : : "cc" );
265 if (!cc)
266 return (char *) s1;
267 s1++;
268 }
269 return NULL;
270}
271EXPORT_SYMBOL(strstr);
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282void *memchr(const void *s, int c, size_t n)
283{
284 register int r0 asm("0") = (char) c;
285 const void *ret = s + n;
286
287 asm volatile ("0: srst %0,%1\n"
288 " jo 0b\n"
289 " jl 1f\n"
290 " la %0,0\n"
291 "1:"
292 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc" );
293 return (void *) ret;
294}
295EXPORT_SYMBOL(memchr);
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303int memcmp(const void *cs, const void *ct, size_t n)
304{
305 register unsigned long r2 asm("2") = (unsigned long) cs;
306 register unsigned long r3 asm("3") = (unsigned long) n;
307 register unsigned long r4 asm("4") = (unsigned long) ct;
308 register unsigned long r5 asm("5") = (unsigned long) n;
309 int ret;
310
311 asm volatile ("0: clcle %1,%3,0\n"
312 " jo 0b\n"
313 " ipm %0\n"
314 " srl %0,28"
315 : "=&d" (ret), "+a" (r2), "+a" (r3), "+a" (r4), "+a" (r5)
316 : : "cc" );
317 if (ret)
318 ret = *(char *) r2 - *(char *) r4;
319 return ret;
320}
321EXPORT_SYMBOL(memcmp);
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332void *memscan(void *s, int c, size_t n)
333{
334 register int r0 asm("0") = (char) c;
335 const void *ret = s + n;
336
337 asm volatile ("0: srst %0,%1\n"
338 " jo 0b\n"
339 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc" );
340 return (void *) ret;
341}
342EXPORT_SYMBOL(memscan);
343