arch/m68k/include/asm/string.h

   1 #ifndef _M68K_STRING_H_
   2 #define _M68K_STRING_H_
   3
   4 #include <linux/types.h>
   5 #include <linux/compiler.h>
   6
   7 #define __HAVE_ARCH_STRNLEN
   8 static inline size_t strnlen(const char *s, size_t count)
   9 {
  10         const char *sc = s;
  11
  12         asm volatile ("\n"
  13                 "1:     subq.l  #1,%1\n"
  14                 "       jcs     2f\n"
  15                 "       tst.b   (%0)+\n"
  16                 "       jne     1b\n"
  17                 "       subq.l  #1,%0\n"
  18                 "2:"
  19                 : "+a" (sc), "+d" (count));
  20         return sc - s;
  21 }
  22
  23 #define __HAVE_ARCH_STRNCPY
  24 static inline char *strncpy(char *dest, const char *src, size_t n)
  25 {
  26         char *xdest = dest;
  27
  28         asm volatile ("\n"
  29                 "       jra     2f\n"
  30                 "1:     move.b  (%1),(%0)+\n"
  31                 "       jeq     2f\n"
  32                 "       addq.l  #1,%1\n"
  33                 "2:     subq.l  #1,%2\n"
  34                 "       jcc     1b\n"
  35                 : "+a" (dest), "+a" (src), "+d" (n)
  36                 : : "memory");
  37         return xdest;
  38 }
  39
  40 #ifndef CONFIG_COLDFIRE
  41 #define __HAVE_ARCH_STRCMP
  42 static inline int strcmp(const char *cs, const char *ct)
  43 {
  44         char res;
  45
  46         asm ("\n"
  47                 "1:     move.b  (%0)+,%2\n"     /* get *cs */
  48                 "       cmp.b   (%1)+,%2\n"     /* compare a byte */
  49                 "       jne     2f\n"           /* not equal, break out */
  50                 "       tst.b   %2\n"           /* at end of cs? */
  51                 "       jne     1b\n"           /* no, keep going */
  52                 "       jra     3f\n"           /* strings are equal */
  53                 "2:     sub.b   -(%1),%2\n"     /* *cs - *ct */
  54                 "3:"
  55                 : "+a" (cs), "+a" (ct), "=d" (res));
  56         return res;
  57 }
  58 #endif /* CONFIG_COLDFIRE */
  59
  60 #define __HAVE_ARCH_MEMMOVE
  61 extern void *memmove(void *, const void *, __kernel_size_t);
  62
  63 #define memcmp(d, s, n) __builtin_memcmp(d, s, n)
  64
  65 #define __HAVE_ARCH_MEMSET
  66 extern void *memset(void *, int, __kernel_size_t);
  67 #define memset(d, c, n) __builtin_memset(d, c, n)
  68
  69 #define __HAVE_ARCH_MEMCPY
  70 extern void *memcpy(void *, const void *, __kernel_size_t);
  71 #define memcpy(d, s, n) __builtin_memcpy(d, s, n)
  72
  73 #endif /* _M68K_STRING_H_ */