fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-xtensa / string.h
blob5fb8c27cbef58dd98cb3847e2bc1b286fdad1cd3
1 /*
2 * include/asm-xtensa/string.h
4 * These trivial string functions are considered part of the public domain.
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
10 * Copyright (C) 2001 - 2005 Tensilica Inc.
13 /* We should optimize these. See arch/xtensa/lib/strncpy_user.S */
15 #ifndef _XTENSA_STRING_H
16 #define _XTENSA_STRING_H
18 #define __HAVE_ARCH_STRCPY
19 static inline char *strcpy(char *__dest, const char *__src)
21 register char *__xdest = __dest;
22 unsigned long __dummy;
24 __asm__ __volatile__("1:\n\t"
25 "l8ui %2, %1, 0\n\t"
26 "s8i %2, %0, 0\n\t"
27 "addi %1, %1, 1\n\t"
28 "addi %0, %0, 1\n\t"
29 "bnez %2, 1b\n\t"
30 : "=r" (__dest), "=r" (__src), "=&r" (__dummy)
31 : "0" (__dest), "1" (__src)
32 : "memory");
34 return __xdest;
37 #define __HAVE_ARCH_STRNCPY
38 static inline char *strncpy(char *__dest, const char *__src, size_t __n)
40 register char *__xdest = __dest;
41 unsigned long __dummy;
43 if (__n == 0)
44 return __xdest;
46 __asm__ __volatile__(
47 "1:\n\t"
48 "l8ui %2, %1, 0\n\t"
49 "s8i %2, %0, 0\n\t"
50 "addi %1, %1, 1\n\t"
51 "addi %0, %0, 1\n\t"
52 "beqz %2, 2f\n\t"
53 "bne %1, %5, 1b\n"
54 "2:"
55 : "=r" (__dest), "=r" (__src), "=&r" (__dummy)
56 : "0" (__dest), "1" (__src), "r" (__src+__n)
57 : "memory");
59 return __xdest;
62 #define __HAVE_ARCH_STRCMP
63 static inline int strcmp(const char *__cs, const char *__ct)
65 register int __res;
66 unsigned long __dummy;
68 __asm__ __volatile__(
69 "1:\n\t"
70 "l8ui %3, %1, 0\n\t"
71 "addi %1, %1, 1\n\t"
72 "l8ui %2, %0, 0\n\t"
73 "addi %0, %0, 1\n\t"
74 "beqz %2, 2f\n\t"
75 "beq %2, %3, 1b\n"
76 "2:\n\t"
77 "sub %2, %3, %2"
78 : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
79 : "0" (__cs), "1" (__ct));
81 return __res;
84 #define __HAVE_ARCH_STRNCMP
85 static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
87 register int __res;
88 unsigned long __dummy;
90 __asm__ __volatile__(
91 "mov %2, %3\n"
92 "1:\n\t"
93 "beq %0, %6, 2f\n\t"
94 "l8ui %3, %1, 0\n\t"
95 "addi %1, %1, 1\n\t"
96 "l8ui %2, %0, 0\n\t"
97 "addi %0, %0, 1\n\t"
98 "beqz %2, 2f\n\t"
99 "beqz %3, 2f\n\t"
100 "beq %2, %3, 1b\n"
101 "2:\n\t"
102 "sub %2, %3, %2"
103 : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
104 : "0" (__cs), "1" (__ct), "r" (__cs+__n));
106 return __res;
109 #define __HAVE_ARCH_MEMSET
110 extern void *memset(void *__s, int __c, size_t __count);
112 #define __HAVE_ARCH_MEMCPY
113 extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
115 #define __HAVE_ARCH_MEMMOVE
116 extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
118 /* Don't build bcopy at all ... */
119 #define __HAVE_ARCH_BCOPY
121 #define __HAVE_ARCH_MEMSCAN
122 #define memscan memchr
124 #endif /* _XTENSA_STRING_H */