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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _M68K_DIV64_H
2#define _M68K_DIV64_H
3
Stephen Hemminger3927f2e2007-03-25 19:54:23 -07004#include <linux/types.h>
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006/* 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
Stephen Hemminger3927f2e2007-03-25 19:54:23 -070028extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#endif /* _M68K_DIV64_H */