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Linux/arch/mips/lib/ashldi3.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 #include <linux/export.h>
  3 
  4 #include "libgcc.h"
  5 
  6 long long notrace __ashldi3(long long u, word_type b)
  7 {
  8         DWunion uu, w;
  9         word_type bm;
 10 
 11         if (b == 0)
 12                 return u;
 13 
 14         uu.ll = u;
 15         bm = 32 - b;
 16 
 17         if (bm <= 0) {
 18                 w.s.low = 0;
 19                 w.s.high = (unsigned int) uu.s.low << -bm;
 20         } else {
 21                 const unsigned int carries = (unsigned int) uu.s.low >> bm;
 22 
 23                 w.s.low = (unsigned int) uu.s.low << b;
 24                 w.s.high = ((unsigned int) uu.s.high << b) | carries;
 25         }
 26 
 27         return w.ll;
 28 }
 29 
 30 EXPORT_SYMBOL(__ashldi3);
 31 

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