| Masahiro Yamada | 24edb7e | 2015-02-10 21:37:01 +0900 | [diff] [blame] | 1 | #include "libgcc.h" |
| 2 | |
| 3 | long long __ashrdi3(long long u, word_type b) |
| 4 | { |
| 5 | DWunion uu, w; |
| 6 | word_type bm; |
| 7 | |
| 8 | if (b == 0) |
| 9 | return u; |
| 10 | |
| 11 | uu.ll = u; |
| 12 | bm = 32 - b; |
| 13 | |
| 14 | if (bm <= 0) { |
| 15 | /* w.s.high = 1..1 or 0..0 */ |
| 16 | w.s.high = |
| 17 | uu.s.high >> 31; |
| 18 | w.s.low = uu.s.high >> -bm; |
| 19 | } else { |
| 20 | const unsigned int carries = (unsigned int) uu.s.high << bm; |
| 21 | |
| 22 | w.s.high = uu.s.high >> b; |
| 23 | w.s.low = ((unsigned int) uu.s.low >> b) | carries; |
| 24 | } |
| 25 | |
| 26 | return w.ll; |
| 27 | } |