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( 64 "0: srst %0,%1\n" 65 " jo 0b\n" 66 " jl 1f\n" 67 " la %0,0\n" 68 "1:" 69 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc"); 70 return (void *) ret; 71} 72 73static inline void *memscan(void *s, int c, size_t n) 74{ 75 register int r0 asm("0") = (char) c; 76 const void *ret = s + n; 77 78 asm volatile( 79 "0: srst %0,%1\n" 80 " jo 0b\n" 81 : "+a" (ret), "+&a" (s) : "d" (r0) : "cc"); 82 return (void *) ret; 83} 84 85static inline char *strcat(char *dst, const char *src) 86{ 87 register int r0 asm("0") = 0; 88 unsigned long dummy; 89 char *ret = dst; 90 91 asm volatile( 92 "0: srst %0,%1\n" 93 " jo 0b\n" 94 "1: mvst %0,%2\n" 95 " jo 1b" 96 : "=&a" (dummy), "+a" (dst), "+a" (src) 97 : "d" (r0), "0" (0) : "cc", "memory" ); 98 return ret; 99} 100 101static inline char *strcpy(char *dst, const char *src) 102{ 103#if __GNUC__ < 4 104 register int r0 asm("0") = 0; 105 char *ret = dst; 106 107 asm volatile( 108 "0: mvst %0,%1\n" 109 " jo 0b" 110 : "+&a" (dst), "+&a" (src) : "d" (r0) 111 : "cc", "memory"); 112 return ret; 113#else 114 return __builtin_strcpy(dst, src); 115#endif 116} 117 118static inline size_t strlen(const char *s) 119{ 120#if __GNUC__ < 4 121 register unsigned long r0 asm("0") = 0; 122 const char *tmp = s; 123 124 asm volatile( 125 "0: srst %0,%1\n" 126 " jo 0b" 127 : "+d" (r0), "+a" (tmp) : : "cc"); 128 return r0 - (unsigned long) s; 129#else 130 return __builtin_strlen(s); 131#endif 132} 133 134static inline size_t strnlen(const char * s, size_t n) 135{ 136 register int r0 asm("0") = 0; 137 const char *tmp = s; 138 const char *end = s + n; 139 140 asm volatile( 141 "0: srst %0,%1\n" 142 " jo 0b" 143 : "+a" (end), "+a" (tmp) : "d" (r0) : "cc"); 144 return end - s; 145} 146#else /* IN_ARCH_STRING_C */ 147void *memchr(const void * s, int c, size_t n); 148void *memscan(void *s, int c, size_t n); 149char *strcat(char *dst, const char *src); 150char *strcpy(char *dst, const char *src); 151size_t strlen(const char *s); 152size_t strnlen(const char * s, size_t n); 153#endif /* !IN_ARCH_STRING_C */ 154 155#endif /* __KERNEL__ */ 156 157#endif /* __S390_STRING_H_ */ 158