gcc/testsuite/gcc.target/powerpc/bmi-tzcnt-1.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 long long calc_tzcnt_u64 (long long src)
  11 {
  12   int i;
  13   int res = 0;
  14
  15   while ( (res<64) && ((src&1) == 0)) {
  16     ++res;
  17     src >>= 1;
  18   }
  19
  20   return res;
  21 }
  22
  23 static void
  24 bmi_test ()
  25 {
  26   unsigned i;
  27   long long src = 0xfacec0ffeefacec0;
  28   long long res, res_ref;
  29
  30   for (i=0; i<5; ++i) {
  31     src = (i + src) << i;
  32
  33     res_ref = calc_tzcnt_u64 (src);
  34     res = __tzcnt_u64 (src);
  35
  36     if (res != res_ref)
  37       abort();
  38   }
  39 }