gcc/testsuite/gcc.target/i386/bmi-blsi-1.c

   1 /* { dg-do run { target { bmi && { ! ia32 } } } } */
   2 /* { dg-options "-O2 -mbmi -fno-inline" } */
   3
   4 #include <x86intrin.h>
   5
   6 #include "bmi-check.h"
   7
   8 /* To fool compiler, so it not generate blsi here. */
   9 long long calc_blsi_u64 (long long src1, long long src2)
  10 {
  11   return (-src1) & (src2);
  12 }
  13
  14 static void
  15 bmi_test()
  16 {
  17   unsigned i;
  18
  19   long long src = 0xfacec0ffeefacec0;
  20   long long res, res_ref;
  21
  22   for (i=0; i<5; ++i) {
  23     src = i + src << i;
  24
  25     res_ref = calc_blsi_u64 (src, src);
  26     res = __blsi_u64 (src);
  27
  28     if (res != res_ref)
  29       abort();
  30   }
  31 }