Yoshinori Sato | a71a29d | 2015-01-28 02:48:15 +0900 | [diff] [blame] | 1 | #include "libgcc.h" |
2 | |||||
3 | DWtype | ||||
4 | __ashldi3(DWtype u, word_type b) | ||||
5 | { | ||||
6 | const DWunion uu = {.ll = u}; | ||||
7 | const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b; | ||||
8 | DWunion w; | ||||
9 | |||||
10 | if (b == 0) | ||||
11 | return u; | ||||
12 | |||||
13 | if (bm <= 0) { | ||||
14 | w.s.low = 0; | ||||
15 | w.s.high = (UWtype) uu.s.low << -bm; | ||||
16 | } else { | ||||
17 | const UWtype carries = (UWtype) uu.s.low >> bm; | ||||
18 | |||||
19 | w.s.low = (UWtype) uu.s.low << b; | ||||
20 | w.s.high = ((UWtype) uu.s.high << b) | carries; | ||||
21 | } | ||||
22 | |||||
23 | return w.ll; | ||||
24 | } |