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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __S390_DIV64
2#define __S390_DIV64
3
4#ifndef __s390x__
5
6/* for do_div "base" needs to be smaller than 2^31-1 */
7#define do_div(n, base) ({ \
8 unsigned long long __n = (n); \
9 unsigned long __r; \
10 \
11 asm (" slr 0,0\n" \
12 " l 1,%1\n" \
13 " srdl 0,1\n" \
14 " dr 0,%2\n" \
15 " alr 1,1\n" \
16 " alr 0,0\n" \
17 " lhi 2,1\n" \
18 " n 2,%1\n" \
19 " alr 0,2\n" \
20 " clr 0,%2\n" \
21 " jl 0f\n" \
22 " slr 0,%2\n" \
23 " ahi 1,1\n" \
24 "0: st 1,%1\n" \
25 " l 1,4+%1\n" \
26 " srdl 0,1\n" \
27 " dr 0,%2\n" \
28 " alr 1,1\n" \
29 " alr 0,0\n" \
30 " lhi 2,1\n" \
31 " n 2,4+%1\n" \
32 " alr 0,2\n" \
33 " clr 0,%2\n" \
34 " jl 1f\n" \
35 " slr 0,%2\n" \
36 " ahi 1,1\n" \
37 "1: st 1,4+%1\n" \
38 " lr %0,0" \
39 : "=d" (__r), "=m" (__n) \
40 : "d" (base), "m" (__n) : "0", "1", "2", "cc" ); \
41 (n) = (__n); \
42 __r; \
43})
44
45#else /* __s390x__ */
46#include <asm-generic/div64.h>
47#endif /* __s390x__ */
48
49#endif