gcc/testsuite/gcc.target/powerpc/bmi2-bzhi64-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3" } */
   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 "bmi2-check.h"
   9
  10 __attribute__((noinline))
  11 unsigned long long
  12 calc_bzhi_u64 (unsigned long long a, int l)
  13 {
  14   unsigned long long res = a;
  15   int i;
  16   for (i = 0; i < 64 - l; ++i)
  17     res &= ~(1LL << (63 - i));
  18
  19   return res;
  20 }
  21
  22 static void
  23 bmi2_test ()
  24 {
  25   unsigned i;
  26   unsigned long long src = 0xce7ace0ce7ace0ff;
  27   unsigned long long res, res_ref;
  28
  29   for (i = 0; i < 5; ++i) {
  30     src = src * (i + 1);
  31
  32     res_ref = calc_bzhi_u64 (src, i * 2);
  33     res = _bzhi_u64 (src, i * 2);
  34
  35     if (res != res_ref)
  36       abort();
  37   }
  38 }