LXR linux/arch/s390/include/asm/string.h

   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_STRPBRK
  48#undef __HAVE_ARCH_STRSEP
  49#undef __HAVE_ARCH_STRSPN
  50
  51#if !defined(IN_ARCH_STRING_C)
  52
  53static inline void *memchr(const void * s, int c, size_t n)
  54{
  55        register int r0 asm("0") = (char) c;
  56        const void *ret = s + n;
  57
  58        asm volatile(
  59                "0:     srst    %0,%1\n"
  60                "       jo      0b\n"
  61                "       jl      1f\n"
  62                "       la      %0,0\n"
  63                "1:"
  64                : "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
  65        return (void *) ret;
  66}
  67
  68static inline void *memscan(void *s, int c, size_t n)
  69{
  70        register int r0 asm("0") = (char) c;
  71        const void *ret = s + n;
  72
  73        asm volatile(
  74                "0:     srst    %0,%1\n"
  75                "       jo      0b\n"
  76                : "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
  77        return (void *) ret;
  78}
  79
  80static inline char *strcat(char *dst, const char *src)
  81{
  82        register int r0 asm("0") = 0;
  83        unsigned long dummy;
  84        char *ret = dst;
  85
  86        asm volatile(
  87                "0:     srst    %0,%1\n"
  88                "       jo      0b\n"
  89                "1:     mvst    %0,%2\n"
  90                "       jo      1b"
  91                : "=&a" (dummy), "+a" (dst), "+a" (src)
  92                : "d" (r0), "0" (0) : "cc", "memory" );
  93        return ret;
  94}
  95
  96static inline char *strcpy(char *dst, const char *src)
  97{
  98        register int r0 asm("0") = 0;
  99        char *ret = dst;
 100
 101        asm volatile(
 102                "0:     mvst    %0,%1\n"
 103                "       jo      0b"
 104                : "+&a" (dst), "+&a" (src) : "d" (r0)
 105                : "cc", "memory");
 106        return ret;
 107}
 108
 109static inline size_t strlen(const char *s)
 110{
 111        register unsigned long r0 asm("0") = 0;
 112        const char *tmp = s;
 113
 114        asm volatile(
 115                "0:     srst    %0,%1\n"
 116                "       jo      0b"
 117                : "+d" (r0), "+a" (tmp) :  : "cc");
 118        return r0 - (unsigned long) s;
 119}
 120
 121static inline size_t strnlen(const char * s, size_t n)
 122{
 123        register int r0 asm("0") = 0;
 124        const char *tmp = s;
 125        const char *end = s + n;
 126
 127        asm volatile(
 128                "0:     srst    %0,%1\n"
 129                "       jo      0b"
 130                : "+a" (end), "+a" (tmp) : "d" (r0)  : "cc");
 131        return end - s;
 132}
 133#else /* IN_ARCH_STRING_C */
 134void *memchr(const void * s, int c, size_t n);
 135void *memscan(void *s, int c, size_t n);
 136char *strcat(char *dst, const char *src);
 137char *strcpy(char *dst, const char *src);
 138size_t strlen(const char *s);
 139size_t strnlen(const char * s, size_t n);
 140#endif /* !IN_ARCH_STRING_C */
 141
 142#endif /* __S390_STRING_H_ */
 143