33caad1628d4276619daa5b442319a386f4d17a3
[linux-3.10.git] / include / asm-m68k / div64.h
1 #ifndef _M68K_DIV64_H
2 #define _M68K_DIV64_H
3
4 #include <linux/types.h>
5
6 /* n = n / base; return rem; */
7
8 #define do_div(n, base) ({                                      \
9         union {                                                 \
10                 unsigned long n32[2];                           \
11                 unsigned long long n64;                         \
12         } __n;                                                  \
13         unsigned long __rem, __upper;                           \
14                                                                 \
15         __n.n64 = (n);                                          \
16         if ((__upper = __n.n32[0])) {                           \
17                 asm ("divul.l %2,%1:%0"                         \
18                         : "=d" (__n.n32[0]), "=d" (__upper)     \
19                         : "d" (base), "0" (__n.n32[0]));        \
20         }                                                       \
21         asm ("divu.l %2,%1:%0"                                  \
22                 : "=d" (__n.n32[1]), "=d" (__rem)               \
23                 : "d" (base), "1" (__upper), "0" (__n.n32[1])); \
24         (n) = __n.n64;                                          \
25         __rem;                                                  \
26 })
27
28 extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
29 #endif /* _M68K_DIV64_H */