gcc/testsuite/gcc.target/i386/wmul-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-require-effective-target ia32 } */
   4
   5 long long mac(const int *a, const int *b, long long sqr, long long *sum)
   6 {
   7   int i;
   8   long long dotp = *sum;
   9
  10   for (i = 0; i < 150; i++) {
  11     dotp += (long long)b[i] * a[i];
  12     sqr += (long long)b[i] * b[i];
  13   }
  14
  15   *sum = dotp;
  16   return sqr;
  17 }
  18
  19 /* { dg-final { scan-assembler-times "imull" 2 } } */