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_STRNICMP
  48#undef __HAVE_ARCH_STRPBRK
  49#undef __HAVE_ARCH_STRSEP
  50#undef __HAVE_ARCH_STRSPN
  51
  52#if !defined(IN_ARCH_STRING_C)
  53
  54static inline void *memchr(const void * s, int c, size_t n)
  55{
  56        register int r0 asm("0") = (char) c;
  57        const void *ret = s + n;
  58
  59        asm volatile(
  60                "0:     srst    %0,%1\n"
  61                "       jo      0b\n"
  62                "       jl      1f\n"
  63                "       la      %0,0\n"
  64                "1:"
  65                : "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
  66        return (void *) ret;
  67}
  68
  69static inline void *memscan(void *s, int c, size_t n)
  70{
  71        register int r0 asm("0") = (char) c;
  72        const void *ret = s + n;
  73
  74        asm volatile(
  75                "0:     srst    %0,%1\n"
  76                "       jo      0b\n"
  77                : "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
  78        return (void *) ret;
  79}
  80
  81static inline char *strcat(char *dst, const char *src)
  82{
  83        register int r0 asm("0") = 0;
  84        unsigned long dummy;
  85        char *ret = dst;
  86
  87        asm volatile(
  88                "0:     srst    %0,%1\n"
  89                "       jo      0b\n"
  90                "1:     mvst    %0,%2\n"
  91                "       jo      1b"
  92                : "=&a" (dummy), "+a" (dst), "+a" (src)
  93                : "d" (r0), "0" (0) : "cc", "memory" );
  94        return ret;
  95}
  96
  97static inline char *strcpy(char *dst, const char *src)
  98{
  99        register int r0 asm("0") = 0;
 100        char *ret = dst;
 101
 102        asm volatile(
 103                "0:     mvst    %0,%1\n"
 104                "       jo      0b"
 105                : "+&a" (dst), "+&a" (src) : "d" (r0)
 106                : "cc", "memory");
 107        return ret;
 108}
 109
 110static inline size_t strlen(const char *s)
 111{
 112        register unsigned long r0 asm("0") = 0;
 113        const char *tmp = s;
 114
 115        asm volatile(
 116                "0:     srst    %0,%1\n"
 117                "       jo      0b"
 118                : "+d" (r0), "+a" (tmp) :  : "cc");
 119        return r0 - (unsigned long) s;
 120}
 121
 122static inline size_t strnlen(const char * s, size_t n)
 123{
 124        register int r0 asm("0") = 0;
 125        const char *tmp = s;
 126        const char *end = s + n;
 127
 128        asm volatile(
 129                "0:     srst    %0,%1\n"
 130                "       jo      0b"
 131                : "+a" (end), "+a" (tmp) : "d" (r0)  : "cc");
 132        return end - s;
 133}
 134#else /* IN_ARCH_STRING_C */
 135void *memchr(const void * s, int c, size_t n);
 136void *memscan(void *s, int c, size_t n);
 137char *strcat(char *dst, const char *src);
 138char *strcpy(char *dst, const char *src);
 139size_t strlen(const char *s);
 140size_t strnlen(const char * s, size_t n);
 141#endif /* !IN_ARCH_STRING_C */
 142
 143#endif /* __S390_STRING_H_ */
 144