| #ifndef __S390_DIV64 |
| #define __S390_DIV64 |
| |
| /* 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) : "0", "1", "2", "cc" ); \ |
| (n) = (__n); \ |
| __r; \ |
| }) |
| |
| #endif |
