gcc/testsuite/gcc.target/aarch64/vect-clz.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3 -save-temps -fno-inline -fno-vect-cost-model" } */
   3
   4 extern void abort ();
   5
   6 void
   7 count_lz_v4si (unsigned *__restrict a, int *__restrict b)
   8 {
   9   int i;
  10
  11   for (i = 0; i < 4; i++)
  12     b[i] = __builtin_clz (a[i]);
  13 }
  14
  15 /* { dg-final { scan-assembler "clz\tv\[0-9\]+\.4s" } } */
  16
  17 int
  18 main ()
  19 {
  20   unsigned int x[4] = { 0x0, 0xFFFF, 0x1FFFF, 0xFFFFFFFF };
  21   int r[4] = { 32, 16, 15, 0 };
  22   int d[4], i;
  23
  24   count_lz_v4si (x, d);
  25
  26   for (i = 0; i < 4; i++)
  27     {
  28       if (d[i] != r[i])
  29         abort ();
  30     }
  31
  32   return 0;
  33 }
  34