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. */ 34 extern int memcmp(const void *, const void *, size_t); 35 extern void *memcpy(void *, const void *, size_t); 36 extern void *memset(void *, int, size_t); 37 extern int strcmp(const char *,const char *); 38 extern size_t strlcat(char *, const char *, size_t); 39 extern size_t strlcpy(char *, const char *, size_t); 40 extern char *strncat(char *, const char *, size_t); 41 extern char *strncpy(char *, const char *, size_t); 42 extern char *strrchr(const char *, int); 43 extern 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 56 static 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 71 static 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 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( 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 99 static 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 } 115 116 static 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 } 131 132 static 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 */ 145 void *memchr(const void * s, int c, size_t n); 146 void *memscan(void *s, int c, size_t n); 147 char *strcat(char *dst, const char *src); 148 char *strcpy(char *dst, const char *src); 149 size_t strlen(const char *s); 150 size_t strnlen(const char * s, size_t n); 151 #endif /* !IN_ARCH_STRING_C */ 152 153 #endif /* __S390_STRING_H_ */ 154