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- #define IN_ARCH_STRING_C 1
- #include <linux/types.h>
- #include <linux/string.h>
- #include <linux/export.h>
- static inline char *__strend(const char *s)
- {
- register unsigned long r0 asm("0") = 0;
- asm volatile ("0: srst %0,%1\n"
- " jo 0b"
- : "+d" (r0), "+a" (s) : : "cc", "memory");
- return (char *) r0;
- }
- static inline char *__strnend(const char *s, size_t n)
- {
- register unsigned long r0 asm("0") = 0;
- const char *p = s + n;
- asm volatile ("0: srst %0,%1\n"
- " jo 0b"
- : "+d" (p), "+a" (s) : "d" (r0) : "cc", "memory");
- return (char *) p;
- }
- size_t strlen(const char *s)
- {
- return __strend(s) - s;
- }
- EXPORT_SYMBOL(strlen);
- size_t strnlen(const char *s, size_t n)
- {
- return __strnend(s, n) - s;
- }
- EXPORT_SYMBOL(strnlen);
- char *strcpy(char *dest, const char *src)
- {
- register int r0 asm("0") = 0;
- char *ret = dest;
- asm volatile ("0: mvst %0,%1\n"
- " jo 0b"
- : "+&a" (dest), "+&a" (src) : "d" (r0)
- : "cc", "memory" );
- return ret;
- }
- EXPORT_SYMBOL(strcpy);
- size_t strlcpy(char *dest, const char *src, size_t size)
- {
- size_t ret = __strend(src) - src;
- if (size) {
- size_t len = (ret >= size) ? size-1 : ret;
- dest[len] = '\0';
- memcpy(dest, src, len);
- }
- return ret;
- }
- EXPORT_SYMBOL(strlcpy);
- char *strncpy(char *dest, const char *src, size_t n)
- {
- size_t len = __strnend(src, n) - src;
- memset(dest + len, 0, n - len);
- memcpy(dest, src, len);
- return dest;
- }
- EXPORT_SYMBOL(strncpy);
- char *strcat(char *dest, const char *src)
- {
- register int r0 asm("0") = 0;
- unsigned long dummy;
- char *ret = dest;
- asm volatile ("0: srst %0,%1\n"
- " jo 0b\n"
- "1: mvst %0,%2\n"
- " jo 1b"
- : "=&a" (dummy), "+a" (dest), "+a" (src)
- : "d" (r0), "0" (0UL) : "cc", "memory" );
- return ret;
- }
- EXPORT_SYMBOL(strcat);
- size_t strlcat(char *dest, const char *src, size_t n)
- {
- size_t dsize = __strend(dest) - dest;
- size_t len = __strend(src) - src;
- size_t res = dsize + len;
- if (dsize < n) {
- dest += dsize;
- n -= dsize;
- if (len >= n)
- len = n - 1;
- dest[len] = '\0';
- memcpy(dest, src, len);
- }
- return res;
- }
- EXPORT_SYMBOL(strlcat);
- char *strncat(char *dest, const char *src, size_t n)
- {
- size_t len = __strnend(src, n) - src;
- char *p = __strend(dest);
- p[len] = '\0';
- memcpy(p, src, len);
- return dest;
- }
- EXPORT_SYMBOL(strncat);
- int strcmp(const char *s1, const char *s2)
- {
- register int r0 asm("0") = 0;
- int ret = 0;
- asm volatile ("0: clst %2,%3\n"
- " jo 0b\n"
- " je 1f\n"
- " ic %0,0(%2)\n"
- " ic %1,0(%3)\n"
- " sr %0,%1\n"
- "1:"
- : "+d" (ret), "+d" (r0), "+a" (s1), "+a" (s2)
- : : "cc", "memory");
- return ret;
- }
- EXPORT_SYMBOL(strcmp);
- char *strrchr(const char *s, int c)
- {
- size_t len = __strend(s) - s;
- if (len)
- do {
- if (s[len] == (char) c)
- return (char *) s + len;
- } while (--len > 0);
- return NULL;
- }
- EXPORT_SYMBOL(strrchr);
- static inline int clcle(const char *s1, unsigned long l1,
- const char *s2, unsigned long l2)
- {
- register unsigned long r2 asm("2") = (unsigned long) s1;
- register unsigned long r3 asm("3") = (unsigned long) l1;
- register unsigned long r4 asm("4") = (unsigned long) s2;
- register unsigned long r5 asm("5") = (unsigned long) l2;
- int cc;
- asm volatile ("0: clcle %1,%3,0\n"
- " jo 0b\n"
- " ipm %0\n"
- " srl %0,28"
- : "=&d" (cc), "+a" (r2), "+a" (r3),
- "+a" (r4), "+a" (r5) : : "cc", "memory");
- return cc;
- }
- char *strstr(const char *s1, const char *s2)
- {
- int l1, l2;
- l2 = __strend(s2) - s2;
- if (!l2)
- return (char *) s1;
- l1 = __strend(s1) - s1;
- while (l1-- >= l2) {
- int cc;
- cc = clcle(s1, l2, s2, l2);
- if (!cc)
- return (char *) s1;
- s1++;
- }
- return NULL;
- }
- EXPORT_SYMBOL(strstr);
- void *memchr(const void *s, int c, size_t n)
- {
- register int r0 asm("0") = (char) c;
- const void *ret = s + n;
- asm volatile ("0: srst %0,%1\n"
- " jo 0b\n"
- " jl 1f\n"
- " la %0,0\n"
- "1:"
- : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
- return (void *) ret;
- }
- EXPORT_SYMBOL(memchr);
- int memcmp(const void *s1, const void *s2, size_t n)
- {
- int ret;
- ret = clcle(s1, n, s2, n);
- if (ret)
- ret = ret == 1 ? -1 : 1;
- return ret;
- }
- EXPORT_SYMBOL(memcmp);
- void *memscan(void *s, int c, size_t n)
- {
- register int r0 asm("0") = (char) c;
- const void *ret = s + n;
- asm volatile ("0: srst %0,%1\n"
- " jo 0b\n"
- : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
- return (void *) ret;
- }
- EXPORT_SYMBOL(memscan);
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