jdk-24/test/hotspot/gtest/gc/z/test_zBitField.cpp

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#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";
  }
}