1 #ifndef __ASM_PARISC_DIV64
2 #define __ASM_PARISC_DIV64
3
4 #ifdef __LP64__
5
6 /*
7 * Copyright (C) 1999 Hewlett-Packard Co
8 * Copyright (C) 1999 David Mosberger-Tang <davidm@hpl.hp.com>
9 *
10 * vsprintf uses this to divide a 64-bit integer N by a small integer BASE.
11 * This is incredibly hard on IA-64 and HPPA
12 */
13
14 #define do_div(n,base) \
15 ({ \
16 int _res; \
17 _res = ((unsigned long) (n)) % (unsigned) (base); \
18 (n) = ((unsigned long) (n)) / (unsigned) (base); \
19 _res; \
20 })
21
22 #else
23 /*
24 * unsigned long long division. Yuck Yuck! What is Linux coming to?
25 * This is 100% disgusting
26 */
27 #define do_div(n,base) \
28 ({ \
29 unsigned long __low, __low2, __high, __rem; \
30 __low = (n) & 0xffffffff; \
31 __high = (n) >> 32; \
32 if (__high) { \
33 __rem = __high % (unsigned long)base; \
34 __high = __high / (unsigned long)base; \
35 __low2 = __low >> 16; \
36 __low2 += __rem << 16; \
37 __rem = __low2 % (unsigned long)base; \
38 __low2 = __low2 / (unsigned long)base; \
39 __low = __low & 0xffff; \
40 __low += __rem << 16; \
41 __rem = __low % (unsigned long)base; \
42 __low = __low / (unsigned long)base; \
43 n = __low + ((long long)__low2 << 16) + \
44 ((long long) __high << 32); \
45 } else { \
46 __rem = __low % (unsigned long)base; \
47 n = (__low / (unsigned long)base); \
48 } \
49 __rem; \
50 })
51 #endif
52
53 #endif
54
55
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