| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 */ |