Linux kernel mirror (for testing)
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linux
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. */
36extern int memcmp(const void *, const void *, size_t);
37extern void *memcpy(void *, const void *, size_t);
38extern void *memset(void *, int, size_t);
39extern int strcmp(const char *,const char *);
40extern size_t strlcat(char *, const char *, size_t);
41extern size_t strlcpy(char *, const char *, size_t);
42extern char *strncat(char *, const char *, size_t);
43extern char *strncpy(char *, const char *, size_t);
44extern char *strrchr(const char *, int);
45extern 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
58static 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
72static 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
83static 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
98static 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
110static 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
121static 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_ */