Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. */ |
| 36 | extern int memcmp(const void *, const void *, size_t); |
| 37 | extern void *memcpy(void *, const void *, size_t); |
| 38 | extern void *memset(void *, int, size_t); |
| 39 | extern int strcmp(const char *,const char *); |
| 40 | extern size_t strlcat(char *, const char *, size_t); |
| 41 | extern size_t strlcpy(char *, const char *, size_t); |
| 42 | extern char *strncat(char *, const char *, size_t); |
| 43 | extern char *strncpy(char *, const char *, size_t); |
| 44 | extern char *strrchr(const char *, int); |
| 45 | extern 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 | |
| 58 | static 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 | |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 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"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | return (void *) ret; |
| 71 | } |
| 72 | |
| 73 | static 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 | |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 78 | asm volatile( |
| 79 | "0: srst %0,%1\n" |
| 80 | " jo 0b\n" |
| 81 | : "+a" (ret), "+&a" (s) : "d" (r0) : "cc"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | return (void *) ret; |
| 83 | } |
| 84 | |
| 85 | static 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 | |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 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" ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | return ret; |
| 99 | } |
| 100 | |
| 101 | static inline char *strcpy(char *dst, const char *src) |
| 102 | { |
| 103 | register int r0 asm("0") = 0; |
| 104 | char *ret = dst; |
| 105 | |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 106 | asm volatile( |
| 107 | "0: mvst %0,%1\n" |
| 108 | " jo 0b" |
| 109 | : "+&a" (dst), "+&a" (src) : "d" (r0) |
| 110 | : "cc", "memory"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | return ret; |
| 112 | } |
| 113 | |
| 114 | static inline size_t strlen(const char *s) |
| 115 | { |
| 116 | register unsigned long r0 asm("0") = 0; |
| 117 | const char *tmp = s; |
| 118 | |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 119 | asm volatile( |
| 120 | "0: srst %0,%1\n" |
| 121 | " jo 0b" |
| 122 | : "+d" (r0), "+a" (tmp) : : "cc"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | return r0 - (unsigned long) s; |
| 124 | } |
| 125 | |
| 126 | static inline size_t strnlen(const char * s, size_t n) |
| 127 | { |
| 128 | register int r0 asm("0") = 0; |
| 129 | const char *tmp = s; |
| 130 | const char *end = s + n; |
| 131 | |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 132 | asm volatile( |
| 133 | "0: srst %0,%1\n" |
| 134 | " jo 0b" |
| 135 | : "+a" (end), "+a" (tmp) : "d" (r0) : "cc"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | return end - s; |
| 137 | } |
Rusty Russell | 6faf250 | 2009-03-26 15:24:33 +0100 | [diff] [blame^] | 138 | #else /* IN_ARCH_STRING_C */ |
| 139 | void *memchr(const void * s, int c, size_t n); |
| 140 | void *memscan(void *s, int c, size_t n); |
| 141 | char *strcat(char *dst, const char *src); |
| 142 | char *strcpy(char *dst, const char *src); |
| 143 | size_t strlen(const char *s); |
| 144 | size_t strnlen(const char * s, size_t n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | #endif /* !IN_ARCH_STRING_C */ |
| 146 | |
| 147 | #endif /* __KERNEL__ */ |
| 148 | |
| 149 | #endif /* __S390_STRING_H_ */ |