div64.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- #ifndef _M68K_DIV64_H
- #define _M68K_DIV64_H
- /* n = n / base; return rem; */
- #if 1
- #define do_div(n, base) ({
- union {
- unsigned long n32[2];
- unsigned long long n64;
- } __n;
- unsigned long __rem, __upper;
-
- __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;
- })
- #else
- #define do_div(n,base) ({
- int __res;
- __res = ((unsigned long) n) % (unsigned) base;
- n = ((unsigned long) n) / (unsigned) base;
- __res;
- })
- #endif
- #endif /* _M68K_DIV64_H */