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/* SPDX-License-Identifier: GPL-2.0 */
#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; \
})
/* defining this stops the unused helper function from being built */
#define __div64_32 __div64_32
#endif /* CONFIG_CPU_HAS_NO_MULDIV64 */
#endif /* _M68K_DIV64_H */