gcc/testsuite/gcc.target/powerpc/bmi2-pdep32-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3 -mdejagnu-cpu=power7" } */
   3 /* { dg-require-effective-target lp64 } */
   4 /* { dg-require-effective-target vsx_hw } */
   5 /* { dg-require-effective-target ppc_cpu_supports_hw } */
   6
   7 #define NO_WARN_X86_INTRINSICS 1
   8 #include <x86intrin.h>
   9 #include "bmi2-check.h"
  10
  11 __attribute__((noinline))
  12 unsigned
  13 calc_pdep_u32 (unsigned a, int mask)
  14 {
  15   unsigned res = 0;
  16   int i, k = 0;
  17
  18   for (i = 0; i < 32; ++i)
  19     if (mask & (1 << i)) {
  20       res |= ((a & (1 << k)) >> k) << i;
  21       ++k;
  22     }
  23
  24   return res;
  25 }
  26
  27 static void
  28 bmi2_test ()
  29 {
  30   unsigned i;
  31   unsigned src = 0xce7acc;
  32   unsigned res, res_ref;
  33
  34   for (i = 0; i < 5; ++i) {
  35     src = src * (i + 1);
  36
  37     res_ref = calc_pdep_u32 (src, i * 3);
  38     res = _pdep_u32 (src, i * 3);
  39
  40     if (res != res_ref)
  41       abort();
  42   }
  43 }