diff options
Diffstat (limited to 'include/asm-s390/div64.h')
| -rw-r--r-- | include/asm-s390/div64.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/include/asm-s390/div64.h b/include/asm-s390/div64.h new file mode 100644 index 000000000000..af098dc3cf59 --- /dev/null +++ b/include/asm-s390/div64.h @@ -0,0 +1,49 @@ +#ifndef __S390_DIV64 +#define __S390_DIV64 + +#ifndef __s390x__ + +/* for do_div "base" needs to be smaller than 2^31-1 */ +#define do_div(n, base) ({ \ + unsigned long long __n = (n); \ + unsigned long __r; \ + \ + asm (" slr 0,0\n" \ + " l 1,%1\n" \ + " srdl 0,1\n" \ + " dr 0,%2\n" \ + " alr 1,1\n" \ + " alr 0,0\n" \ + " lhi 2,1\n" \ + " n 2,%1\n" \ + " alr 0,2\n" \ + " clr 0,%2\n" \ + " jl 0f\n" \ + " slr 0,%2\n" \ + " ahi 1,1\n" \ + "0: st 1,%1\n" \ + " l 1,4+%1\n" \ + " srdl 0,1\n" \ + " dr 0,%2\n" \ + " alr 1,1\n" \ + " alr 0,0\n" \ + " lhi 2,1\n" \ + " n 2,4+%1\n" \ + " alr 0,2\n" \ + " clr 0,%2\n" \ + " jl 1f\n" \ + " slr 0,%2\n" \ + " ahi 1,1\n" \ + "1: st 1,4+%1\n" \ + " lr %0,0" \ + : "=d" (__r), "=m" (__n) \ + : "d" (base), "m" (__n) : "0", "1", "2", "cc" ); \ + (n) = (__n); \ + __r; \ +}) + +#else /* __s390x__ */ +#include <asm-generic/div64.h> +#endif /* __s390x__ */ + +#endif |