gcc/testsuite/gcc.target/powerpc/bmi2-pdep64-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3 -mcpu=power7" } */
   3 /* { dg-require-effective-target lp64 } */
   4 /* { dg-require-effective-target vsx_hw } */
   5 /* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power7" } } */
   6 /* { dg-require-effective-target ppc_cpu_supports_hw } */
   7
   8 #define NO_WARN_X86_INTRINSICS 1
   9 #include <x86intrin.h>
  10 #include "bmi2-check.h"
  11
  12 __attribute__((noinline))
  13 unsigned long long
  14 calc_pdep_u64 (unsigned long long a, unsigned long long mask)
  15 {
  16   unsigned long long res = 0;
  17   unsigned long long i, k = 0;
  18
  19   for (i = 0; i < 64; ++i)
  20     if (mask & (1LL << i)) {
  21       res |= ((a & (1LL << k)) >> k) << i;
  22       ++k;
  23     }
  24   return res;
  25 }
  26
  27 static
  28 void
  29 bmi2_test ()
  30 {
  31   unsigned long long i;
  32   unsigned long long src = 0xce7acce7acce7ac;
  33   unsigned long long res, res_ref;
  34
  35   for (i = 0; i < 5; ++i) {
  36     src = src * (i + 1);
  37
  38     res_ref = calc_pdep_u64 (src, ~(i * 3));
  39     res = _pdep_u64 (src, ~(i * 3));
  40
  41     if (res != res_ref)
  42       abort ();
  43   }
  44 }