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