| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2014 Google, Inc. |
| * |
| * Based on linux arch/mips/lib/ashldi3.c |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #ifndef __ORDER_LITTLE_ENDIAN__ |
| #errror "What endian are you!?" |
| #endif |
| |
| typedef unsigned word_type; |
| long long __ashldi3(long long u, word_type b); |
| |
| struct DWstruct { |
| int low, high; |
| }; |
| typedef union { |
| struct DWstruct s; |
| long long ll; |
| } DWunion; |
| |
| long long __ashldi3(long long u, word_type b) |
| { |
| DWunion uu, w; |
| word_type bm; |
| |
| if (b == 0) |
| return u; |
| |
| uu.ll = u; |
| bm = 32 - b; |
| |
| if (bm <= 0) { |
| w.s.low = 0; |
| w.s.high = (unsigned int) uu.s.low << -bm; |
| } else { |
| const unsigned int carries = (unsigned int) uu.s.low >> bm; |
| |
| w.s.low = (unsigned int) uu.s.low << b; |
| w.s.high = ((unsigned int) uu.s.high << b) | carries; |
| } |
| |
| return w.ll; |
| } |