include/asm-m68knommu/string.h

   1 #ifndef _M68KNOMMU_STRING_H_
   2 #define _M68KNOMMU_STRING_H_
   3
   4 #ifdef __KERNEL__ /* only set these up for kernel code */
   5
   6 #include <asm/setup.h>
   7 #include <asm/page.h>
   8
   9 #define __HAVE_ARCH_STRCPY
  10 static inline char * strcpy(char * dest,const char *src)
  11 {
  12   char *xdest = dest;
  13
  14   __asm__ __volatile__
  15        ("1:\tmoveb %1@+,%0@+\n\t"
  16         "jne 1b"
  17         : "=a" (dest), "=a" (src)
  18         : "0" (dest), "1" (src) : "memory");
  19   return xdest;
  20 }
  21
  22 #define __HAVE_ARCH_STRNCPY
  23 static inline char * strncpy(char *dest, const char *src, size_t n)
  24 {
  25   char *xdest = dest;
  26
  27   if (n == 0)
  28     return xdest;
  29
  30   __asm__ __volatile__
  31        ("1:\tmoveb %1@+,%0@+\n\t"
  32         "jeq 2f\n\t"
  33         "subql #1,%2\n\t"
  34         "jne 1b\n\t"
  35         "2:"
  36         : "=a" (dest), "=a" (src), "=d" (n)
  37         : "0" (dest), "1" (src), "2" (n)
  38         : "memory");
  39   return xdest;
  40 }
  41
  42
  43 #ifndef CONFIG_COLDFIRE
  44
  45 #define __HAVE_ARCH_STRCMP
  46 static inline int strcmp(const char * cs,const char * ct)
  47 {
  48   char __res;
  49
  50   __asm__
  51        ("1:\tmoveb %0@+,%2\n\t" /* get *cs */
  52         "cmpb %1@+,%2\n\t"      /* compare a byte */
  53         "jne  2f\n\t"           /* not equal, break out */
  54         "tstb %2\n\t"           /* at end of cs? */
  55         "jne  1b\n\t"           /* no, keep going */
  56         "jra  3f\n\t"           /* strings are equal */
  57         "2:\tsubb %1@-,%2\n\t"  /* *cs - *ct */
  58         "3:"
  59         : "=a" (cs), "=a" (ct), "=d" (__res)
  60         : "0" (cs), "1" (ct));
  61
  62   return __res;
  63 }
  64
  65 #define __HAVE_ARCH_STRNCMP
  66 static inline int strncmp(const char * cs,const char * ct,size_t count)
  67 {
  68   char __res;
  69
  70   if (!count)
  71     return 0;
  72   __asm__
  73        ("1:\tmovb %0@+,%3\n\t"          /* get *cs */
  74         "cmpb   %1@+,%3\n\t"            /* compare a byte */
  75         "jne    3f\n\t"                 /* not equal, break out */
  76         "tstb   %3\n\t"                 /* at end of cs? */
  77         "jeq    4f\n\t"                 /* yes, all done */
  78         "subql  #1,%2\n\t"              /* no, adjust count */
  79         "jne    1b\n\t"                 /* more to do, keep going */
  80         "2:\tmoveq #0,%3\n\t"           /* strings are equal */
  81         "jra    4f\n\t"
  82         "3:\tsubb %1@-,%3\n\t"          /* *cs - *ct */
  83         "4:"
  84         : "=a" (cs), "=a" (ct), "=d" (count), "=d" (__res)
  85         : "0" (cs), "1" (ct), "2" (count));
  86   return __res;
  87 }
  88
  89 #endif /* CONFIG_COLDFIRE */
  90
  91 #define __HAVE_ARCH_MEMSET
  92 extern void * memset(void * s, int c, size_t count);
  93
  94 #define __HAVE_ARCH_MEMCPY
  95 extern void * memcpy(void *d, const void *s, size_t count);
  96
  97 #else /* KERNEL */
  98
  99 /*
 100  *      let user libraries deal with these,
 101  *      IMHO the kernel has no place defining these functions for user apps
 102  */
 103
 104 #define __HAVE_ARCH_STRCPY 1
 105 #define __HAVE_ARCH_STRNCPY 1
 106 #define __HAVE_ARCH_STRCAT 1
 107 #define __HAVE_ARCH_STRNCAT 1
 108 #define __HAVE_ARCH_STRCMP 1
 109 #define __HAVE_ARCH_STRNCMP 1
 110 #define __HAVE_ARCH_STRNICMP 1
 111 #define __HAVE_ARCH_STRCHR 1
 112 #define __HAVE_ARCH_STRRCHR 1
 113 #define __HAVE_ARCH_STRSTR 1
 114 #define __HAVE_ARCH_STRLEN 1
 115 #define __HAVE_ARCH_STRNLEN 1
 116 #define __HAVE_ARCH_MEMSET 1
 117 #define __HAVE_ARCH_MEMCPY 1
 118 #define __HAVE_ARCH_MEMMOVE 1
 119 #define __HAVE_ARCH_MEMSCAN 1
 120 #define __HAVE_ARCH_MEMCMP 1
 121 #define __HAVE_ARCH_MEMCHR 1
 122 #define __HAVE_ARCH_STRTOK 1
 123
 124 #endif /* KERNEL */
 125
 126 #endif /* _M68K_STRING_H_ */