linux/arch/m68k/include/asm/div64.h
Greg Ungerer d20f5aa338 m68k: merge the mmu and non-mmu versions of div64.h
Trivial merge of the mmu and non-mmu versions of div64.h

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2009-03-24 15:17:45 +10:00

35 lines
728 B
C

#ifndef _M68K_DIV64_H
#define _M68K_DIV64_H
#ifdef CONFIG_MMU
#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; \
})
#else
#include <asm-generic/div64.h>
#endif /* CONFIG_MMU */
#endif /* _M68K_DIV64_H */