| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | #include "libgcc.h" |
| 3 | |
| 4 | DWtype |
| 5 | __ashldi3(DWtype u, word_type b) |
| 6 | { |
| 7 | const DWunion uu = {.ll = u}; |
| 8 | const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b; |
| 9 | DWunion w; |
| 10 | |
| 11 | if (b == 0) |
| 12 | return u; |
| 13 | |
| 14 | if (bm <= 0) { |
| 15 | w.s.low = 0; |
| 16 | w.s.high = (UWtype) uu.s.low << -bm; |
| 17 | } else { |
| 18 | const UWtype carries = (UWtype) uu.s.low >> bm; |
| 19 | |
| 20 | w.s.low = (UWtype) uu.s.low << b; |
| 21 | w.s.high = ((UWtype) uu.s.high << b) | carries; |
| 22 | } |
| 23 | |
| 24 | return w.ll; |
| 25 | } |