/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. */

#include <gtest/gtest.h>
#include "paddle/math/float16.h"

namespace paddle {

TEST(float16, conversion_cpu) {
  // Conversion to and from Eigen::half
  EXPECT_EQ(float16(Eigen::half(float16(1.0f))).x, 0x3c00);
  EXPECT_EQ(float16(Eigen::half(float16(0.5f))).x, 0x3800);
  EXPECT_EQ(float16(Eigen::half(float16(0.33333f))).x, 0x3555);
  EXPECT_EQ(float16(Eigen::half(float16(0.0f))).x, 0x0000);
  EXPECT_EQ(float16(Eigen::half(float16(-0.0f))).x, 0x8000);
  EXPECT_EQ(float16(Eigen::half(float16(65504.0f))).x, 0x7bff);
  EXPECT_EQ(float16(Eigen::half(float16(65536.0f))).x, 0x7c00);

  // Conversion from float
  EXPECT_EQ(float16(1.0f).x, 0x3c00);
  EXPECT_EQ(float16(0.5f).x, 0x3800);
  EXPECT_EQ(float16(0.33333f).x, 0x3555);
  EXPECT_EQ(float16(0.0f).x, 0x0000);
  EXPECT_EQ(float16(-0.0f).x, 0x8000);
  EXPECT_EQ(float16(65504.0f).x, 0x7bff);
  EXPECT_EQ(float16(65536.0f).x, 0x7c00);

  // Conversion from double

  // Conversion from int

  // Conversion from bool
}

TEST(float16, arithmetic_cpu) { EXPECT_EQ(float(float16(2) + float16(2)), 4); }

TEST(float16, comparison_cpu) { EXPECT_TRUE(float16(1.0f) > float16(0.5f)); }

}  // namespace paddle