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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; \
- })
- #endif /* CONFIG_CPU_HAS_NO_MULDIV64 */
- #endif /* _M68K_DIV64_H */
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