// SPDX-License-Identifier: Apache-2.0

// ----------------------------------------------------------------------------

// Copyright 2021 Arm Limited

//

// 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.

// ----------------------------------------------------------------------------

/**

* @brief Unit tests for the software half-float library.

*/

#include "gtest/gtest.h"

#include "../astcenc_internal.h"

namespace astcenc

{

#if (ASTCENC_F16C == 0) && (ASTCENC_NEON == 0)

/** @brief Test normal numbers. */

TEST(softfloat, FP16NormalNumbers)

{

float result = sf16_to_float((15 << 10) + 1);

EXPECT_NEAR(result, 1.00098f, 0.00005f);

}

/** @brief Test denormal numbers. */

TEST(softfloat, FP16DenormalNumbers)

{

float result = sf16_to_float((0 << 10) + 1);

EXPECT_NEAR(result, 5.96046e-08f, 0.00005f);

}

/** @brief Test zero. */

TEST(softfloat, FP16Zero)

{

float result = sf16_to_float(0x0000);

EXPECT_EQ(result, 0.0f);

}

/** @brief Test infinity. */

TEST(softfloat, FP16Infinity)

{

float result = sf16_to_float((31 << 10) + 0);

EXPECT_TRUE(std::isinf(result));

}

/** @brief Test NaN. */

TEST(softfloat, FP16NaN)

{

float result = sf16_to_float(0xFFFF);

EXPECT_TRUE(std::isnan(result));

}

#endif

}