tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _M68K_DIV64_H
2#define _M68K_DIV64_H
3
4#ifdef CONFIG_MMU
5
6#include <linux/types.h>
7
8/* n = n / base; return rem; */
9
10#define do_div(n, base) ({ \
11 union { \
12 unsigned long n32[2]; \
13 unsigned long long n64; \
14 } __n; \
15 unsigned long __rem, __upper; \
16 \
17 __n.n64 = (n); \
18 if ((__upper = __n.n32[0])) { \
19 asm ("divul.l %2,%1:%0" \
20 : "=d" (__n.n32[0]), "=d" (__upper) \
21 : "d" (base), "0" (__n.n32[0])); \
22 } \
23 asm ("divu.l %2,%1:%0" \
24 : "=d" (__n.n32[1]), "=d" (__rem) \
25 : "d" (base), "1" (__upper), "0" (__n.n32[1])); \
26 (n) = __n.n64; \
27 __rem; \
28})
29
30#else
31#include <asm-generic/div64.h>
32#endif /* CONFIG_MMU */
33
34#endif /* _M68K_DIV64_H */