[linux-2.6-block.git] / arch / m68k / include / asm / div64.h

#ifndef _M68K_DIV64_H
#define _M68K_DIV64_H

#ifdef CONFIG_CPU_HAS_NO_MULDIV64
#include <asm-generic/div64.h>
#else

#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;				\
	unsigned long __base = (base);				\
								\
	__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 /* CONFIG_CPU_HAS_NO_MULDIV64 */

#endif /* _M68K_DIV64_H */
Commit	Line	Data
d20f5aa3 GU	1	#ifndef _M68K_DIV64_H
	2	#define _M68K_DIV64_H
	3
84f3fb7a GU	4	#ifdef CONFIG_CPU_HAS_NO_MULDIV64
	5	#include <asm-generic/div64.h>
	6	#else
d20f5aa3 GU	7
	8	#include <linux/types.h>
	9
	10	/* n = n / base; return rem; */
	11
	12	#define do_div(n, base) ({ \
	13	union { \
	14	unsigned long n32[2]; \
	15	unsigned long long n64; \
	16	} __n; \
	17	unsigned long __rem, __upper; \
ea077b1b	18	unsigned long __base = (base); \
d20f5aa3 GU	19	\
	20	__n.n64 = (n); \
	21	if ((__upper = __n.n32[0])) { \
	22	asm ("divul.l %2,%1:%0" \
ea077b1b AS	23	: "=d" (__n.n32[0]), "=d" (__upper) \
ea077b1b AS	24	: "d" (__base), "0" (__n.n32[0])); \
d20f5aa3 GU	25	} \
d20f5aa3 GU	26	asm ("divu.l %2,%1:%0" \
ea077b1b AS	27	: "=d" (__n.n32[1]), "=d" (__rem) \
ea077b1b AS	28	: "d" (__base), "1" (__upper), "0" (__n.n32[1])); \
d20f5aa3 GU	29	(n) = __n.n64; \
	30	__rem; \
	31	})
	32
84f3fb7a	33	#endif /* CONFIG_CPU_HAS_NO_MULDIV64 */
d20f5aa3 GU	34
d20f5aa3 GU	35	#endif /* _M68K_DIV64_H */