| Paul Gortmaker | 527581b | 2016-08-21 15:58:15 -0400 | [diff] [blame] | 1 | #include <linux/export.h> |
| Ralf Baechle | 72fbfb26 | 2006-06-07 13:25:37 +0100 | [diff] [blame] | 2 | |
| 3 | #include "libgcc.h" |
| 4 | |
| Harvey Hunt | aedcfbe | 2016-05-25 11:06:35 +0100 | [diff] [blame] | 5 | long long notrace __ashrdi3(long long u, word_type b) |
| Ralf Baechle | 72fbfb26 | 2006-06-07 13:25:37 +0100 | [diff] [blame] | 6 | { |
| 7 | DWunion uu, w; |
| 8 | word_type bm; |
| 9 | |
| 10 | if (b == 0) |
| 11 | return u; |
| 12 | |
| 13 | uu.ll = u; |
| 14 | bm = 32 - b; |
| 15 | |
| 16 | if (bm <= 0) { |
| 17 | /* w.s.high = 1..1 or 0..0 */ |
| 18 | w.s.high = |
| 19 | uu.s.high >> 31; |
| 20 | w.s.low = uu.s.high >> -bm; |
| 21 | } else { |
| 22 | const unsigned int carries = (unsigned int) uu.s.high << bm; |
| 23 | |
| 24 | w.s.high = uu.s.high >> b; |
| 25 | w.s.low = ((unsigned int) uu.s.low >> b) | carries; |
| 26 | } |
| 27 | |
| 28 | return w.ll; |
| 29 | } |
| 30 | |
| 31 | EXPORT_SYMBOL(__ashrdi3); |