--- /dev/null	2018-04-03 12:55:20.301839954 +0200
+++ new/test/hotspot/gtest/gc/z/test_zBitField.cpp	2018-06-08 19:47:00.111452429 +0200
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * ORACLE PROPRIETARY/CONFIDENTIAL.  Use is subject to license terms.
+ */
+
+#include "precompiled.hpp"
+#include "gc/z/zBitField.hpp"
+#include "unittest.hpp"
+
+TEST(ZBitFieldTest, test) {
+  typedef ZBitField<uint64_t, bool,      0,  1>    field_bool;
+  typedef ZBitField<uint64_t, uint8_t,   1,  8>    field_uint8;
+  typedef ZBitField<uint64_t, uint16_t,  2, 16>    field_uint16;
+  typedef ZBitField<uint64_t, uint32_t, 32, 32>    field_uint32;
+  typedef ZBitField<uint64_t, uint64_t,  0, 63>    field_uint64;
+  typedef ZBitField<uint64_t, void*,     1, 61, 3> field_pointer;
+
+  uint64_t entry;
+
+  {
+    const bool value = false;
+    entry = field_bool::encode(value);
+    EXPECT_EQ(field_bool::decode(entry), value) << "Should be equal";
+  }
+
+  {
+    const bool value = true;
+    entry = field_bool::encode(value);
+      EXPECT_EQ(field_bool::decode(entry), value) << "Should be equal";
+  }
+
+  {
+    const uint8_t value = ~(uint8_t)0;
+    entry = field_uint8::encode(value);
+    EXPECT_EQ(field_uint8::decode(entry), value) << "Should be equal";
+  }
+
+  {
+    const uint16_t value = ~(uint16_t)0;
+    entry = field_uint16::encode(value);
+    EXPECT_EQ(field_uint16::decode(entry), value) << "Should be equal";
+  }
+
+  {
+    const uint32_t value = ~(uint32_t)0;
+    entry = field_uint32::encode(value);
+    EXPECT_EQ(field_uint32::decode(entry), value) << "Should be equal";
+  }
+
+  {
+    const uint64_t value = ~(uint64_t)0 >> 1;
+    entry = field_uint64::encode(value);
+    EXPECT_EQ(field_uint64::decode(entry), value) << "Should be equal";
+  }
+
+  {
+    void* const value = (void*)(~(uintptr_t)0 << 3);
+    entry = field_pointer::encode(value);
+    EXPECT_EQ(field_pointer::decode(entry), value) << "Should be equal";
+  }
+}