1 files changed, 35 insertions, 0 deletions
diff --git a/gcc-4.8/gcc/testsuite/gcc.target/i386/lzcnt-6.c b/gcc-4.8/gcc/testsuite/gcc.target/i386/lzcnt-6.c
new file mode 100644
index 000000000..f0bf5dab0
--- /dev/null
+++ b/gcc-4.8/gcc/testsuite/gcc.target/i386/lzcnt-6.c
@@ -0,0 +1,35 @@
+/* { dg-do run { target { lzcnt && { ! ia32 } } } } */
+/* { dg-options "-O2 -mlzcnt -fno-inline" } */
+
+#include <x86intrin.h>
+
+#include "lzcnt-check.h"
+
+long long calc_lzcnt_u64 (long long src)
+{
+  int i;
+  int res = 0;
+
+  while ((res < 64) && (((src >> (63 - res)) & 1) == 0))
+    ++res;
+
+  return res;
+}
+
+static void
+lzcnt_test ()
+{
+  unsigned i;
+  long long src = 0xce7ace0ce7ace0;
+  long long res, res_ref;
+
+  for (i=0; i<5; ++i) {
+    src = src >> i;
+
+    res_ref = calc_lzcnt_u64 (src);
+    res = __lzcnt64 (src);
+
+    if (res != res_ref)
+      abort();
+  }
+}