include/asm-s390/string.h

   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
  19 #define __HAVE_ARCH_MEMCPY
  20 #define __HAVE_ARCH_MEMSET
  21 #define __HAVE_ARCH_STRCAT
  22 #define __HAVE_ARCH_STRCMP
  23 #define __HAVE_ARCH_STRCPY
  24 #define __HAVE_ARCH_STRLEN
  25 #define __HAVE_ARCH_STRNCPY
  26
  27 #undef __HAVE_ARCH_MEMMOVE
  28 #undef __HAVE_ARCH_STRNICMP
  29 #undef __HAVE_ARCH_STRNCAT
  30 #undef __HAVE_ARCH_STRNCMP
  31 #undef __HAVE_ARCH_STRCHR
  32 #undef __HAVE_ARCH_STRRCHR
  33 #undef __HAVE_ARCH_STRNLEN
  34 #undef __HAVE_ARCH_STRSPN
  35 #undef __HAVE_ARCH_STRPBRK
  36 #undef __HAVE_ARCH_STRTOK
  37 #undef __HAVE_ARCH_BCOPY
  38 #undef __HAVE_ARCH_MEMCMP
  39 #undef __HAVE_ARCH_MEMSCAN
  40 #undef __HAVE_ARCH_STRSTR
  41
  42 extern void *memset(void *, int, size_t);
  43
  44 extern inline void * memchr(const void * cs,int c,size_t count)
  45 {
  46     void *ptr;
  47
  48     __asm__ __volatile__ ("   lr    0,%2\n"
  49                           "   la    %0,0(%3,%1)\n"
  50                           "0: srst  %0,%1\n"
  51                           "   jo    0b\n"
  52                           "   brc   13,1f\n"
  53                           "   slr   %0,%0\n"
  54                           "1:"
  55                           : "=a" (ptr) : "a" (cs), "d" (c), "d" (count)
  56                           : "cc", "0" );
  57     return ptr;
  58 }
  59
  60 extern __inline__ char *strcpy(char *dest, const char *src)
  61 {
  62     char *tmp = dest;
  63
  64     __asm__ __volatile__ ("   sr    0,0\n"
  65                           "0: mvst  %0,%1\n"
  66                           "   jo    0b"
  67                           : "+&a" (dest), "+&a" (src) :
  68                           : "cc", "memory", "0" );
  69     return tmp;
  70 }
  71
  72 extern __inline__ size_t strlen(const char *s)
  73 {
  74     size_t len;
  75
  76     __asm__ __volatile__ ("   sr    0,0\n"
  77                           "   lr    %0,%1\n"
  78                           "0: srst  0,%0\n"
  79                           "   jo    0b\n"
  80                           "   lr    %0,0\n"
  81                           "   sr    %0,%1"
  82                           : "=&a" (len) : "a" (s)
  83                           : "cc", "0" );
  84     return len;
  85 }
  86
  87 extern __inline__ char *strcat(char *dest, const char *src)
  88 {
  89     char *tmp = dest;
  90
  91     __asm__ __volatile__ ("   sr    0,0\n"
  92                           "0: srst  0,%0\n"
  93                           "   jo    0b\n"
  94                           "   lr    %0,0\n"
  95                           "   sr    0,0\n"
  96                           "1: mvst  %0,%1\n"
  97                           "   jo    1b"
  98                           : "+&a" (dest), "+&a" (src) :
  99                           : "cc", "memory", "0" );
 100     return tmp;
 101 }
 102
 103
 104 #endif /* __KERNEL__ */
 105
 106 #endif /* __S390_STRING_H_ */
 107