| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | |
| 2 | unsigned long udivmodsi4(unsigned long num, unsigned long den, int modwanted) |
| 3 | { |
| 4 | unsigned long bits = 1; |
| 5 | unsigned long ret = 0; |
| 6 | unsigned long tmpnum = num; |
| 7 | unsigned long tmpden = den; |
| 8 | |
| 9 | while (tmpden < tmpnum && bits && !(tmpden & (1L<<31))) |
| 10 | { |
| 11 | tmpden <<=1; |
| 12 | bits <<=1; |
| 13 | } |
| 14 | while (bits) |
| 15 | { |
| 16 | if (tmpnum >= tmpden) |
| 17 | { |
| 18 | tmpnum -= tmpden; |
| 19 | ret |= bits; |
| 20 | } |
| 21 | bits >>=1; |
| 22 | tmpden >>=1; |
| 23 | } |
| 24 | if (modwanted) return tmpnum; |
| 25 | |
| 26 | return ret; |
| 27 | } |