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1da177e4 LT |
1 | /* |
2 | * include/asm-s390/string.h | |
3 | * | |
4 | * S390 version | |
5 | * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
6 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), | |
7 | */ | |
8 | ||
9 | #ifndef _S390_STRING_H_ | |
10 | #define _S390_STRING_H_ | |
11 | ||
12 | #ifdef __KERNEL__ | |
13 | ||
14 | #ifndef _LINUX_TYPES_H | |
15 | #include <linux/types.h> | |
16 | #endif | |
17 | ||
18 | #define __HAVE_ARCH_MEMCHR /* inline & arch function */ | |
19 | #define __HAVE_ARCH_MEMCMP /* arch function */ | |
20 | #define __HAVE_ARCH_MEMCPY /* gcc builtin & arch function */ | |
21 | #define __HAVE_ARCH_MEMSCAN /* inline & arch function */ | |
22 | #define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */ | |
23 | #define __HAVE_ARCH_STRCAT /* inline & arch function */ | |
24 | #define __HAVE_ARCH_STRCMP /* arch function */ | |
25 | #define __HAVE_ARCH_STRCPY /* inline & arch function */ | |
26 | #define __HAVE_ARCH_STRLCAT /* arch function */ | |
27 | #define __HAVE_ARCH_STRLCPY /* arch function */ | |
28 | #define __HAVE_ARCH_STRLEN /* inline & arch function */ | |
29 | #define __HAVE_ARCH_STRNCAT /* arch function */ | |
30 | #define __HAVE_ARCH_STRNCPY /* arch function */ | |
31 | #define __HAVE_ARCH_STRNLEN /* inline & arch function */ | |
32 | #define __HAVE_ARCH_STRRCHR /* arch function */ | |
33 | #define __HAVE_ARCH_STRSTR /* arch function */ | |
34 | ||
35 | /* Prototypes for non-inlined arch strings functions. */ | |
36 | extern int memcmp(const void *, const void *, size_t); | |
37 | extern void *memcpy(void *, const void *, size_t); | |
38 | extern void *memset(void *, int, size_t); | |
39 | extern int strcmp(const char *,const char *); | |
40 | extern size_t strlcat(char *, const char *, size_t); | |
41 | extern size_t strlcpy(char *, const char *, size_t); | |
42 | extern char *strncat(char *, const char *, size_t); | |
43 | extern char *strncpy(char *, const char *, size_t); | |
44 | extern char *strrchr(const char *, int); | |
45 | extern char *strstr(const char *, const char *); | |
46 | ||
47 | #undef __HAVE_ARCH_MEMMOVE | |
48 | #undef __HAVE_ARCH_STRCHR | |
49 | #undef __HAVE_ARCH_STRNCHR | |
50 | #undef __HAVE_ARCH_STRNCMP | |
51 | #undef __HAVE_ARCH_STRNICMP | |
52 | #undef __HAVE_ARCH_STRPBRK | |
53 | #undef __HAVE_ARCH_STRSEP | |
54 | #undef __HAVE_ARCH_STRSPN | |
55 | ||
56 | #if !defined(IN_ARCH_STRING_C) | |
57 | ||
58 | static inline void *memchr(const void * s, int c, size_t n) | |
59 | { | |
60 | register int r0 asm("0") = (char) c; | |
61 | const void *ret = s + n; | |
62 | ||
63 | asm volatile ("0: srst %0,%1\n" | |
64 | " jo 0b\n" | |
65 | " jl 1f\n" | |
66 | " la %0,0\n" | |
67 | "1:" | |
68 | : "+a" (ret), "+&a" (s) : "d" (r0) : "cc" ); | |
69 | return (void *) ret; | |
70 | } | |
71 | ||
72 | static inline void *memscan(void *s, int c, size_t n) | |
73 | { | |
74 | register int r0 asm("0") = (char) c; | |
75 | const void *ret = s + n; | |
76 | ||
77 | asm volatile ("0: srst %0,%1\n" | |
78 | " jo 0b\n" | |
79 | : "+a" (ret), "+&a" (s) : "d" (r0) : "cc" ); | |
80 | return (void *) ret; | |
81 | } | |
82 | ||
83 | static inline char *strcat(char *dst, const char *src) | |
84 | { | |
85 | register int r0 asm("0") = 0; | |
86 | unsigned long dummy; | |
87 | char *ret = dst; | |
88 | ||
89 | asm volatile ("0: srst %0,%1\n" | |
90 | " jo 0b\n" | |
91 | "1: mvst %0,%2\n" | |
92 | " jo 1b" | |
93 | : "=&a" (dummy), "+a" (dst), "+a" (src) | |
94 | : "d" (r0), "0" (0) : "cc", "memory" ); | |
95 | return ret; | |
96 | } | |
97 | ||
98 | static inline char *strcpy(char *dst, const char *src) | |
99 | { | |
100 | register int r0 asm("0") = 0; | |
101 | char *ret = dst; | |
102 | ||
103 | asm volatile ("0: mvst %0,%1\n" | |
104 | " jo 0b" | |
105 | : "+&a" (dst), "+&a" (src) : "d" (r0) | |
106 | : "cc", "memory" ); | |
107 | return ret; | |
108 | } | |
109 | ||
110 | static inline size_t strlen(const char *s) | |
111 | { | |
112 | register unsigned long r0 asm("0") = 0; | |
113 | const char *tmp = s; | |
114 | ||
115 | asm volatile ("0: srst %0,%1\n" | |
116 | " jo 0b" | |
117 | : "+d" (r0), "+a" (tmp) : : "cc" ); | |
118 | return r0 - (unsigned long) s; | |
119 | } | |
120 | ||
121 | static inline size_t strnlen(const char * s, size_t n) | |
122 | { | |
123 | register int r0 asm("0") = 0; | |
124 | const char *tmp = s; | |
125 | const char *end = s + n; | |
126 | ||
127 | asm volatile ("0: srst %0,%1\n" | |
128 | " jo 0b" | |
129 | : "+a" (end), "+a" (tmp) : "d" (r0) : "cc" ); | |
130 | return end - s; | |
131 | } | |
132 | ||
133 | #endif /* !IN_ARCH_STRING_C */ | |
134 | ||
135 | #endif /* __KERNEL__ */ | |
136 | ||
137 | #endif /* __S390_STRING_H_ */ |