1/* 2 * arch/score/lib/ashrdi3.c 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, see the file COPYING, or write 16 * to the Free Software Foundation, Inc., 17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20#include <linux/module.h> 21#include "libgcc.h" 22 23long long __ashrdi3(long long u, word_type b) 24{ 25 DWunion uu, w; 26 word_type bm; 27 28 if (b == 0) 29 return u; 30 31 uu.ll = u; 32 bm = 32 - b; 33 34 if (bm <= 0) { 35 /* w.s.high = 1..1 or 0..0 */ 36 w.s.high = 37 uu.s.high >> 31; 38 w.s.low = uu.s.high >> -bm; 39 } else { 40 const unsigned int carries = (unsigned int) uu.s.high << bm; 41 42 w.s.high = uu.s.high >> b; 43 w.s.low = ((unsigned int) uu.s.low >> b) | carries; 44 } 45 46 return w.ll; 47} 48EXPORT_SYMBOL(__ashrdi3); 49