33 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * lib/lshrdi3.c4 */5 6#include <linux/module.h>7#include <linux/libgcc.h>8 9long long notrace __lshrdi3(long long u, word_type b)10{11 DWunion uu, w;12 word_type bm;13 14 if (b == 0)15 return u;16 17 uu.ll = u;18 bm = 32 - b;19 20 if (bm <= 0) {21 w.s.high = 0;22 w.s.low = (unsigned int) uu.s.high >> -bm;23 } else {24 const unsigned int carries = (unsigned int) uu.s.high << bm;25 26 w.s.high = (unsigned int) uu.s.high >> b;27 w.s.low = ((unsigned int) uu.s.low >> b) | carries;28 }29 30 return w.ll;31}32EXPORT_SYMBOL(__lshrdi3);33