[deliverable/linux.git] / include / asm-m68k / div64.h

#ifndef _M68K_DIV64_H
#define _M68K_DIV64_H

#include <linux/types.h>

/* n = n / base; return rem; */

#define do_div(n, base) ({					\
	union {							\
		unsigned long n32[2];				\
		unsigned long long n64;				\
	} __n;							\
	unsigned long __rem, __upper;				\
								\
	__n.n64 = (n);						\
	if ((__upper = __n.n32[0])) {				\
		asm ("divul.l %2,%1:%0"				\
			: "=d" (__n.n32[0]), "=d" (__upper)	\
			: "d" (base), "0" (__n.n32[0]));	\
	}							\
	asm ("divu.l %2,%1:%0"					\
		: "=d" (__n.n32[1]), "=d" (__rem)		\
		: "d" (base), "1" (__upper), "0" (__n.n32[1]));	\
	(n) = __n.n64;						\
	__rem;							\
})

#endif /* _M68K_DIV64_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _M68K_DIV64_H
	2	#define _M68K_DIV64_H
	3
3927f2e8 SH	4	#include <linux/types.h>
3927f2e8 SH	5
1da177e4 LT	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	#endif /* _M68K_DIV64_H */