include/asm-m68k/div64.h

   1 #ifndef _M68K_DIV64_H
   2 #define _M68K_DIV64_H
   3
   4 /* n = n / base; return rem; */
   5
   6 #if 1
   7 #define do_div(n, base) ({                                      \
   8         union {                                                 \
   9                 unsigned long n32[2];                           \
  10                 unsigned long long n64;                         \
  11         } __n;                                                  \
  12         unsigned long __rem, __upper;                           \
  13                                                                 \
  14         __n.n64 = (n);                                          \
  15         if ((__upper = __n.n32[0])) {                           \
  16                 asm ("divul.l %2,%1:%0"                         \
  17                         : "=d" (__n.n32[0]), "=d" (__upper)     \
  18                         : "d" (base), "0" (__n.n32[0]));        \
  19         }                                                       \
  20         asm ("divu.l %2,%1:%0"                                  \
  21                 : "=d" (__n.n32[1]), "=d" (__rem)               \
  22                 : "d" (base), "1" (__upper), "0" (__n.n32[1])); \
  23         (n) = __n.n64;                                          \
  24         __rem;                                                  \
  25 })
  26 #else
  27 #define do_div(n,base) ({                                       \
  28         int __res;                                              \
  29         __res = ((unsigned long) n) % (unsigned) base;          \
  30         n = ((unsigned long) n) / (unsigned) base;              \
  31         __res;                                                  \
  32 })
  33 #endif
  34
  35 #endif /* _M68K_DIV64_H */