Linux kernel mirror (for testing)
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linux
1/*
2 * S390 version
3 * Copyright IBM Corp. 1999
4 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
5 */
6
7#ifndef _S390_STRING_H_
8#define _S390_STRING_H_
9
10#ifndef _LINUX_TYPES_H
11#include <linux/types.h>
12#endif
13
14#define __HAVE_ARCH_MEMCHR /* inline & arch function */
15#define __HAVE_ARCH_MEMCMP /* arch function */
16#define __HAVE_ARCH_MEMCPY /* gcc builtin & arch function */
17#define __HAVE_ARCH_MEMSCAN /* inline & arch function */
18#define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */
19#define __HAVE_ARCH_STRCAT /* inline & arch function */
20#define __HAVE_ARCH_STRCMP /* arch function */
21#define __HAVE_ARCH_STRCPY /* inline & arch function */
22#define __HAVE_ARCH_STRLCAT /* arch function */
23#define __HAVE_ARCH_STRLCPY /* arch function */
24#define __HAVE_ARCH_STRLEN /* inline & arch function */
25#define __HAVE_ARCH_STRNCAT /* arch function */
26#define __HAVE_ARCH_STRNCPY /* arch function */
27#define __HAVE_ARCH_STRNLEN /* inline & arch function */
28#define __HAVE_ARCH_STRRCHR /* arch function */
29#define __HAVE_ARCH_STRSTR /* arch function */
30
31/* Prototypes for non-inlined arch strings functions. */
32extern int memcmp(const void *, const void *, size_t);
33extern void *memcpy(void *, const void *, size_t);
34extern void *memset(void *, int, size_t);
35extern int strcmp(const char *,const char *);
36extern size_t strlcat(char *, const char *, size_t);
37extern size_t strlcpy(char *, const char *, size_t);
38extern char *strncat(char *, const char *, size_t);
39extern char *strncpy(char *, const char *, size_t);
40extern char *strrchr(const char *, int);
41extern char *strstr(const char *, const char *);
42
43#undef __HAVE_ARCH_MEMMOVE
44#undef __HAVE_ARCH_STRCHR
45#undef __HAVE_ARCH_STRNCHR
46#undef __HAVE_ARCH_STRNCMP
47#undef __HAVE_ARCH_STRNICMP
48#undef __HAVE_ARCH_STRPBRK
49#undef __HAVE_ARCH_STRSEP
50#undef __HAVE_ARCH_STRSPN
51
52#if !defined(IN_ARCH_STRING_C)
53
54static inline void *memchr(const void * s, int c, size_t n)
55{
56 register int r0 asm("0") = (char) c;
57 const void *ret = s + n;
58
59 asm volatile(
60 "0: srst %0,%1\n"
61 " jo 0b\n"
62 " jl 1f\n"
63 " la %0,0\n"
64 "1:"
65 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
66 return (void *) ret;
67}
68
69static inline void *memscan(void *s, int c, size_t n)
70{
71 register int r0 asm("0") = (char) c;
72 const void *ret = s + n;
73
74 asm volatile(
75 "0: srst %0,%1\n"
76 " jo 0b\n"
77 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
78 return (void *) ret;
79}
80
81static inline char *strcat(char *dst, const char *src)
82{
83 register int r0 asm("0") = 0;
84 unsigned long dummy;
85 char *ret = dst;
86
87 asm volatile(
88 "0: srst %0,%1\n"
89 " jo 0b\n"
90 "1: mvst %0,%2\n"
91 " jo 1b"
92 : "=&a" (dummy), "+a" (dst), "+a" (src)
93 : "d" (r0), "0" (0) : "cc", "memory" );
94 return ret;
95}
96
97static inline char *strcpy(char *dst, const char *src)
98{
99#if __GNUC__ < 4
100 register int r0 asm("0") = 0;
101 char *ret = dst;
102
103 asm volatile(
104 "0: mvst %0,%1\n"
105 " jo 0b"
106 : "+&a" (dst), "+&a" (src) : "d" (r0)
107 : "cc", "memory");
108 return ret;
109#else
110 return __builtin_strcpy(dst, src);
111#endif
112}
113
114static inline size_t strlen(const char *s)
115{
116#if __GNUC__ < 4
117 register unsigned long r0 asm("0") = 0;
118 const char *tmp = s;
119
120 asm volatile(
121 "0: srst %0,%1\n"
122 " jo 0b"
123 : "+d" (r0), "+a" (tmp) : : "cc");
124 return r0 - (unsigned long) s;
125#else
126 return __builtin_strlen(s);
127#endif
128}
129
130static inline size_t strnlen(const char * s, size_t n)
131{
132 register int r0 asm("0") = 0;
133 const char *tmp = s;
134 const char *end = s + n;
135
136 asm volatile(
137 "0: srst %0,%1\n"
138 " jo 0b"
139 : "+a" (end), "+a" (tmp) : "d" (r0) : "cc");
140 return end - s;
141}
142#else /* IN_ARCH_STRING_C */
143void *memchr(const void * s, int c, size_t n);
144void *memscan(void *s, int c, size_t n);
145char *strcat(char *dst, const char *src);
146char *strcpy(char *dst, const char *src);
147size_t strlen(const char *s);
148size_t strnlen(const char * s, size_t n);
149#endif /* !IN_ARCH_STRING_C */
150
151#endif /* __S390_STRING_H_ */