1 #ifndef _M68K_DIV64_H 2 #define _M68K_DIV64_H 3 4 #ifdef CONFIG_CPU_HAS_NO_MULDIV64 5 #include <asm-generic/div64.h> 6 #else 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; \ 18 \ 19 __n.n64 = (n); \ 20 if ((__upper = __n.n32[0])) { \ 21 asm ("divul.l %2,%1:%0" \ 22 : "=d" (__n.n32[0]), "=d" (__upper) \ 23 : "d" (base), "0" (__n.n32[0])); \ 24 } \ 25 asm ("divu.l %2,%1:%0" \ 26 : "=d" (__n.n32[1]), "=d" (__rem) \ 27 : "d" (base), "1" (__upper), "0" (__n.n32[1])); \ 28 (n) = __n.n64; \ 29 __rem; \ 30 }) 31 32 #endif /* CONFIG_CPU_HAS_NO_MULDIV64 */ 33 34 #endif /* _M68K_DIV64_H */ 35