gcc/testsuite/gcc.target/arm/wmul-2.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target arm_dsp } */
   3 /* { dg-options "-O1 -fexpensive-optimizations -mtune=cortex-a9" } */
   4
   5 void vec_mpy(int y[], const short x[], short scaler)
   6 {
   7  int i;
   8
   9  for (i = 0; i < 150; i++)
  10    y[i] += ((scaler * x[i]) >> 31);
  11 }
  12
  13 /* { dg-final { scan-assembler-times "smulbb" 1 } } */