diff options
Diffstat (limited to 'include/asm-m68k/div64.h')
| -rw-r--r-- | include/asm-m68k/div64.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-m68k/div64.h b/include/asm-m68k/div64.h new file mode 100644 index 00000000000..9f65de1a248 --- /dev/null +++ b/include/asm-m68k/div64.h @@ -0,0 +1,26 @@ +#ifndef _M68K_DIV64_H +#define _M68K_DIV64_H + +/* n = n / base; return rem; */ + +#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; \ +}) + +#endif /* _M68K_DIV64_H */ |