1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * lib/lshrdi3.c 4 */ 5 6 #include <linux/module.h> 7 #include <linux/libgcc.h> 8 9 long 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 } 32 EXPORT_SYMBOL(__lshrdi3); 33