1#ifndef _M68K_DIV64_H 2#define _M68K_DIV64_H 3 4/* n = n / base; return rem; */ 5 6#define do_div(n, base) ({ \ 7 union { \ 8 unsigned long n32[2]; \ 9 unsigned long long n64; \ 10 } __n; \ 11 unsigned long __rem, __upper; \ 12 \ 13 __n.n64 = (n); \ 14 if ((__upper = __n.n32[0])) { \ 15 asm ("divul.l %2,%1:%0" \ 16 : "=d" (__n.n32[0]), "=d" (__upper) \ 17 : "d" (base), "0" (__n.n32[0])); \ 18 } \ 19 asm ("divu.l %2,%1:%0" \ 20 : "=d" (__n.n32[1]), "=d" (__rem) \ 21 : "d" (base), "1" (__upper), "0" (__n.n32[1])); \ 22 (n) = __n.n64; \ 23 __rem; \ 24}) 25 26#endif /* _M68K_DIV64_H */ 27