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[unix-history] / gnu / usr.bin / gcc1 / gnulib / longlong / lshldi3.c

#include "longlong.h"

long long
__lshldi3 (u, b1)
    long long u;
    long long b1;
{
 long_long w;
 unsigned long carries;
 int bm;
 long_long uu;
 int b = b1;

 if (b == 0)
   return u;

 uu.ll = u;

 bm = (sizeof (int) * BITS_PER_UNIT) - b;
 if (bm <= 0)
   {
     w.s.low = 0;
     w.s.high = (unsigned long)uu.s.low << -bm;
   }
 else
   {
     carries = (unsigned long)uu.s.low >> bm;
     w.s.low = (unsigned long)uu.s.low << b;
     w.s.high = ((unsigned long)uu.s.high << b) | carries;
   }

 return w.ll;
}