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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#ifndef _LINUX_TYPES_H
13#include <linux/types.h>
14#endif
15
16#define __HAVE_ARCH_MEMCHR /* inline & arch function */
17#define __HAVE_ARCH_MEMCMP /* arch function */
18#define __HAVE_ARCH_MEMCPY /* gcc builtin & arch function */
19#define __HAVE_ARCH_MEMSCAN /* inline & arch function */
20#define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */
21#define __HAVE_ARCH_STRCAT /* inline & arch function */
22#define __HAVE_ARCH_STRCMP /* arch function */
23#define __HAVE_ARCH_STRCPY /* inline & arch function */
24#define __HAVE_ARCH_STRLCAT /* arch function */
25#define __HAVE_ARCH_STRLCPY /* arch function */
26#define __HAVE_ARCH_STRLEN /* inline & arch function */
27#define __HAVE_ARCH_STRNCAT /* arch function */
28#define __HAVE_ARCH_STRNCPY /* arch function */
29#define __HAVE_ARCH_STRNLEN /* inline & arch function */
30#define __HAVE_ARCH_STRRCHR /* arch function */
31#define __HAVE_ARCH_STRSTR /* arch function */
32
33/* Prototypes for non-inlined arch strings functions. */
34extern int memcmp(const void *, const void *, size_t);
35extern void *memcpy(void *, const void *, size_t);
36extern void *memset(void *, int, size_t);
37extern int strcmp(const char *,const char *);
38extern size_t strlcat(char *, const char *, size_t);
39extern size_t strlcpy(char *, const char *, size_t);
40extern char *strncat(char *, const char *, size_t);
41extern char *strncpy(char *, const char *, size_t);
42extern char *strrchr(const char *, int);
43extern char *strstr(const char *, const char *);
44
45#undef __HAVE_ARCH_MEMMOVE
46#undef __HAVE_ARCH_STRCHR
47#undef __HAVE_ARCH_STRNCHR
48#undef __HAVE_ARCH_STRNCMP
49#undef __HAVE_ARCH_STRNICMP
50#undef __HAVE_ARCH_STRPBRK
51#undef __HAVE_ARCH_STRSEP
52#undef __HAVE_ARCH_STRSPN
53
54#if !defined(IN_ARCH_STRING_C)
55
56static inline void *memchr(const void * s, int c, size_t n)
57{
58 register int r0 asm("0") = (char) c;
59 const void *ret = s + n;
60
61 asm volatile(
62 "0: srst %0,%1\n"
63 " jo 0b\n"
64 " jl 1f\n"
65 " la %0,0\n"
66 "1:"
67 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
68 return (void *) ret;
69}
70
71static inline void *memscan(void *s, int c, size_t n)
72{
73 register int r0 asm("0") = (char) c;
74 const void *ret = s + n;
75
76 asm volatile(
77 "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(
90 "0: srst %0,%1\n"
91 " jo 0b\n"
92 "1: mvst %0,%2\n"
93 " jo 1b"
94 : "=&a" (dummy), "+a" (dst), "+a" (src)
95 : "d" (r0), "0" (0) : "cc", "memory" );
96 return ret;
97}
98
99static inline char *strcpy(char *dst, const char *src)
100{
101#if __GNUC__ < 4
102 register int r0 asm("0") = 0;
103 char *ret = dst;
104
105 asm volatile(
106 "0: mvst %0,%1\n"
107 " jo 0b"
108 : "+&a" (dst), "+&a" (src) : "d" (r0)
109 : "cc", "memory");
110 return ret;
111#else
112 return __builtin_strcpy(dst, src);
113#endif
114}
115
116static inline size_t strlen(const char *s)
117{
118#if __GNUC__ < 4
119 register unsigned long r0 asm("0") = 0;
120 const char *tmp = s;
121
122 asm volatile(
123 "0: srst %0,%1\n"
124 " jo 0b"
125 : "+d" (r0), "+a" (tmp) : : "cc");
126 return r0 - (unsigned long) s;
127#else
128 return __builtin_strlen(s);
129#endif
130}
131
132static inline size_t strnlen(const char * s, size_t n)
133{
134 register int r0 asm("0") = 0;
135 const char *tmp = s;
136 const char *end = s + n;
137
138 asm volatile(
139 "0: srst %0,%1\n"
140 " jo 0b"
141 : "+a" (end), "+a" (tmp) : "d" (r0) : "cc");
142 return end - s;
143}
144#else /* IN_ARCH_STRING_C */
145void *memchr(const void * s, int c, size_t n);
146void *memscan(void *s, int c, size_t n);
147char *strcat(char *dst, const char *src);
148char *strcpy(char *dst, const char *src);
149size_t strlen(const char *s);
150size_t strnlen(const char * s, size_t n);
151#endif /* !IN_ARCH_STRING_C */
152
153#endif /* __S390_STRING_H_ */