gcc/testsuite/gcc.target/powerpc/bmi-tzcnt-2.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3 -fno-inline" } */
   3 /* { dg-require-effective-target lp64 } */
   4 /* { dg-require-effective-target ppc_cpu_supports_hw } */
   5
   6 #define NO_WARN_X86_INTRINSICS 1
   7 #include <x86intrin.h>
   8 #include "bmi-check.h"
   9
  10 int calc_tzcnt_u32 (int src)
  11 {
  12   int i;
  13   int res = 0;
  14
  15   while ( (res<32) && ((src&1) == 0)) {
  16     ++res;
  17     src >>= 1;
  18   }
  19   return res;
  20 }
  21
  22 static void
  23 bmi_test ()
  24 {
  25   unsigned i;
  26   int src = 0xfacec0ff;
  27   int res, res_ref;
  28
  29   for (i=0; i<5; ++i) {
  30     src = i + (src << i);
  31
  32     res_ref = calc_tzcnt_u32 (src);
  33     res = __tzcnt_u32 (src);
  34
  35     if (res != res_ref)
  36       abort();
  37   }
  38 }