mathutil_unittest.cpp

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Author : Jamie Madill
Date : 2018-12-29 10:29:33
Hash : ba319ba3
Message : Re-land "Load entry points dynamically in tests and samples." Fixes the Android/ChromeOS/Fuchsia builds by using consistent EGL headers. This CL adds a dynamic loader generator based on XML files. It also refactors the entry point generation script to move the XML parsing into a helper class. Additionally this includes a new GLES 1.0 base header. The new header allows for function pointer types and hiding prototypes. All tests and samples now load ANGLE dynamically. In the future this will be extended to load entry points from the driver directly when possible. This will allow us to perform more accurate A/B testing. The new build configuration leads to some tests having more warnings applied. The CL includes fixes for the new warnings. Bug: angleproject:2995 Change-Id: I5a8772f41a0f89570b3736b785f44b7de1539b57 Reviewed-on: https://chromium-review.googlesource.com/c/1392382 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>
src/common/mathutil_unittest.cpp
//
// Copyright 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// mathutil_unittest:
//   Unit tests for the utils defined in mathutil.h
//

#include "mathutil.h"

#include <gtest/gtest.h>

using namespace gl;

namespace
{

// Test the correctness of packSnorm2x16 and unpackSnorm2x16 functions.
// For floats f1 and f2, unpackSnorm2x16(packSnorm2x16(f1, f2)) should be same as f1 and f2.
TEST(MathUtilTest, packAndUnpackSnorm2x16)
{
    const float input[8][2] = {
        {0.0f, 0.0f},    {1.0f, 1.0f},          {-1.0f, 1.0f},           {-1.0f, -1.0f},
        {0.875f, 0.75f}, {0.00392f, -0.99215f}, {-0.000675f, 0.004954f}, {-0.6937f, -0.02146f}};
    const float floatFaultTolerance = 0.0001f;
    float outputVal1, outputVal2;

    for (size_t i = 0; i < 8; i++)
    {
        unpackSnorm2x16(packSnorm2x16(input[i][0], input[i][1]), &outputVal1, &outputVal2);
        EXPECT_NEAR(input[i][0], outputVal1, floatFaultTolerance);
        EXPECT_NEAR(input[i][1], outputVal2, floatFaultTolerance);
    }
}

// Test the correctness of packSnorm2x16 and unpackSnorm2x16 functions with infinity values,
// result should be clamped to [-1, 1].
TEST(MathUtilTest, packAndUnpackSnorm2x16Infinity)
{
    const float floatFaultTolerance = 0.0001f;
    float outputVal1, outputVal2;

    unpackSnorm2x16(packSnorm2x16(std::numeric_limits<float>::infinity(),
                                  std::numeric_limits<float>::infinity()),
                    &outputVal1, &outputVal2);
    EXPECT_NEAR(1.0f, outputVal1, floatFaultTolerance);
    EXPECT_NEAR(1.0f, outputVal2, floatFaultTolerance);

    unpackSnorm2x16(packSnorm2x16(std::numeric_limits<float>::infinity(),
                                  -std::numeric_limits<float>::infinity()),
                    &outputVal1, &outputVal2);
    EXPECT_NEAR(1.0f, outputVal1, floatFaultTolerance);
    EXPECT_NEAR(-1.0f, outputVal2, floatFaultTolerance);

    unpackSnorm2x16(packSnorm2x16(-std::numeric_limits<float>::infinity(),
                                  -std::numeric_limits<float>::infinity()),
                    &outputVal1, &outputVal2);
    EXPECT_NEAR(-1.0f, outputVal1, floatFaultTolerance);
    EXPECT_NEAR(-1.0f, outputVal2, floatFaultTolerance);
}

// Test the correctness of packUnorm2x16 and unpackUnorm2x16 functions.
// For floats f1 and f2, unpackUnorm2x16(packUnorm2x16(f1, f2)) should be same as f1 and f2.
TEST(MathUtilTest, packAndUnpackUnorm2x16)
{
    const float input[8][2] = {
        {0.0f, 0.0f},    {1.0f, 1.0f},          {-1.0f, 1.0f},           {-1.0f, -1.0f},
        {0.875f, 0.75f}, {0.00392f, -0.99215f}, {-0.000675f, 0.004954f}, {-0.6937f, -0.02146f}};
    const float floatFaultTolerance = 0.0001f;
    float outputVal1, outputVal2;

    for (size_t i = 0; i < 8; i++)
    {
        unpackUnorm2x16(packUnorm2x16(input[i][0], input[i][1]), &outputVal1, &outputVal2);
        float expected = input[i][0] < 0.0f ? 0.0f : input[i][0];
        EXPECT_NEAR(expected, outputVal1, floatFaultTolerance);
        expected = input[i][1] < 0.0f ? 0.0f : input[i][1];
        EXPECT_NEAR(expected, outputVal2, floatFaultTolerance);
    }
}

// Test the correctness of packUnorm2x16 and unpackUnorm2x16 functions with infinity values,
// result should be clamped to [0, 1].
TEST(MathUtilTest, packAndUnpackUnorm2x16Infinity)
{
    const float floatFaultTolerance = 0.0001f;
    float outputVal1, outputVal2;

    unpackUnorm2x16(packUnorm2x16(std::numeric_limits<float>::infinity(),
                                  std::numeric_limits<float>::infinity()),
                    &outputVal1, &outputVal2);
    EXPECT_NEAR(1.0f, outputVal1, floatFaultTolerance);
    EXPECT_NEAR(1.0f, outputVal2, floatFaultTolerance);

    unpackUnorm2x16(packUnorm2x16(std::numeric_limits<float>::infinity(),
                                  -std::numeric_limits<float>::infinity()),
                    &outputVal1, &outputVal2);
    EXPECT_NEAR(1.0f, outputVal1, floatFaultTolerance);
    EXPECT_NEAR(0.0f, outputVal2, floatFaultTolerance);

    unpackUnorm2x16(packUnorm2x16(-std::numeric_limits<float>::infinity(),
                                  -std::numeric_limits<float>::infinity()),
                    &outputVal1, &outputVal2);
    EXPECT_NEAR(0.0f, outputVal1, floatFaultTolerance);
    EXPECT_NEAR(0.0f, outputVal2, floatFaultTolerance);
}

// Test the correctness of packHalf2x16 and unpackHalf2x16 functions.
// For floats f1 and f2, unpackHalf2x16(packHalf2x16(f1, f2)) should be same as f1 and f2.
TEST(MathUtilTest, packAndUnpackHalf2x16)
{
    const float input[8][2] = {
        {0.0f, 0.0f},    {1.0f, 1.0f},          {-1.0f, 1.0f},           {-1.0f, -1.0f},
        {0.875f, 0.75f}, {0.00392f, -0.99215f}, {-0.000675f, 0.004954f}, {-0.6937f, -0.02146f},
    };
    const float floatFaultTolerance = 0.0005f;
    float outputVal1, outputVal2;

    for (size_t i = 0; i < 8; i++)
    {
        unpackHalf2x16(packHalf2x16(input[i][0], input[i][1]), &outputVal1, &outputVal2);
        EXPECT_NEAR(input[i][0], outputVal1, floatFaultTolerance);
        EXPECT_NEAR(input[i][1], outputVal2, floatFaultTolerance);
    }
}

// Test the correctness of packUnorm4x8 and unpackUnorm4x8 functions.
// For floats f1 to f4, unpackUnorm4x8(packUnorm4x8(f1, f2, f3, f4)) should be same as f1 to f4.
TEST(MathUtilTest, packAndUnpackUnorm4x8)
{
    const float input[5][4] = {{0.0f, 0.0f, 0.0f, 0.0f},
                               {1.0f, 1.0f, 1.0f, 1.0f},
                               {-1.0f, 1.0f, -1.0f, 1.0f},
                               {-1.0f, -1.0f, -1.0f, -1.0f},
                               {64.0f / 255.0f, 128.0f / 255.0f, 32.0f / 255.0f, 16.0f / 255.0f}};

    const float floatFaultTolerance = 0.005f;
    float outputVals[4];

    for (size_t i = 0; i < 5; i++)
    {
        UnpackUnorm4x8(PackUnorm4x8(input[i][0], input[i][1], input[i][2], input[i][3]),
                       outputVals);
        for (size_t j = 0; j < 4; j++)
        {
            float expected = input[i][j] < 0.0f ? 0.0f : input[i][j];
            EXPECT_NEAR(expected, outputVals[j], floatFaultTolerance);
        }
    }
}

// Test the correctness of packSnorm4x8 and unpackSnorm4x8 functions.
// For floats f1 to f4, unpackSnorm4x8(packSnorm4x8(f1, f2, f3, f4)) should be same as f1 to f4.
TEST(MathUtilTest, packAndUnpackSnorm4x8)
{
    const float input[5][4] = {{0.0f, 0.0f, 0.0f, 0.0f},
                               {1.0f, 1.0f, 1.0f, 1.0f},
                               {-1.0f, 1.0f, -1.0f, 1.0f},
                               {-1.0f, -1.0f, -1.0f, -1.0f},
                               {64.0f / 127.0f, -8.0f / 127.0f, 32.0f / 127.0f, 16.0f / 127.0f}};

    const float floatFaultTolerance = 0.01f;
    float outputVals[4];

    for (size_t i = 0; i < 5; i++)
    {
        UnpackSnorm4x8(PackSnorm4x8(input[i][0], input[i][1], input[i][2], input[i][3]),
                       outputVals);
        for (size_t j = 0; j < 4; j++)
        {
            float expected = input[i][j];
            EXPECT_NEAR(expected, outputVals[j], floatFaultTolerance);
        }
    }
}

// Test the correctness of gl::isNaN function.
TEST(MathUtilTest, isNaN)
{
    EXPECT_TRUE(isNaN(bitCast<float>(0xffu << 23 | 1u)));
    EXPECT_TRUE(isNaN(bitCast<float>(1u << 31 | 0xffu << 23 | 1u)));
    EXPECT_TRUE(isNaN(bitCast<float>(1u << 31 | 0xffu << 23 | 0x400000u)));
    EXPECT_TRUE(isNaN(bitCast<float>(1u << 31 | 0xffu << 23 | 0x7fffffu)));
    EXPECT_FALSE(isNaN(0.0f));
    EXPECT_FALSE(isNaN(bitCast<float>(1u << 31 | 0xffu << 23)));
    EXPECT_FALSE(isNaN(bitCast<float>(0xffu << 23)));
}

// Test the correctness of gl::isInf function.
TEST(MathUtilTest, isInf)
{
    EXPECT_TRUE(isInf(bitCast<float>(0xffu << 23)));
    EXPECT_TRUE(isInf(bitCast<float>(1u << 31 | 0xffu << 23)));
    EXPECT_FALSE(isInf(0.0f));
    EXPECT_FALSE(isInf(bitCast<float>(0xffu << 23 | 1u)));
    EXPECT_FALSE(isInf(bitCast<float>(1u << 31 | 0xffu << 23 | 1u)));
    EXPECT_FALSE(isInf(bitCast<float>(1u << 31 | 0xffu << 23 | 0x400000u)));
    EXPECT_FALSE(isInf(bitCast<float>(1u << 31 | 0xffu << 23 | 0x7fffffu)));
    EXPECT_FALSE(isInf(bitCast<float>(0xfeu << 23 | 0x7fffffu)));
    EXPECT_FALSE(isInf(bitCast<float>(1u << 31 | 0xfeu << 23 | 0x7fffffu)));
}

TEST(MathUtilTest, CountLeadingZeros)
{
    for (unsigned int i = 0; i < 32u; ++i)
    {
        uint32_t iLeadingZeros = 1u << (31u - i);
        EXPECT_EQ(i, CountLeadingZeros(iLeadingZeros));
    }
    EXPECT_EQ(32u, CountLeadingZeros(0));
}

// Some basic tests. Tests that rounding up zero produces zero.
TEST(MathUtilTest, BasicRoundUp)
{
    EXPECT_EQ(0u, rx::roundUp(0u, 4u));
    EXPECT_EQ(4u, rx::roundUp(1u, 4u));
    EXPECT_EQ(4u, rx::roundUp(4u, 4u));
}

// Test that rounding up zero produces zero for checked ints.
TEST(MathUtilTest, CheckedRoundUpZero)
{
    auto checkedValue = rx::CheckedRoundUp(0u, 4u);
    ASSERT_TRUE(checkedValue.IsValid());
    ASSERT_EQ(0u, checkedValue.ValueOrDie());
}

// Test out-of-bounds with CheckedRoundUp
TEST(MathUtilTest, CheckedRoundUpInvalid)
{
    // The answer to this query is out of bounds.
    auto limit        = std::numeric_limits<unsigned int>::max();
    auto checkedValue = rx::CheckedRoundUp(limit, limit - 1);
    ASSERT_FALSE(checkedValue.IsValid());

    // Our implementation can't handle this query, despite the parameters being in range.
    auto checkedLimit = rx::CheckedRoundUp(limit - 1, limit);
    ASSERT_FALSE(checkedLimit.IsValid());
}

// Test BitfieldReverse which reverses the order of the bits in an integer.
TEST(MathUtilTest, BitfieldReverse)
{
    EXPECT_EQ(0u, gl::BitfieldReverse(0u));
    EXPECT_EQ(0x80000000u, gl::BitfieldReverse(1u));
    EXPECT_EQ(0x1u, gl::BitfieldReverse(0x80000000u));
    uint32_t bits     = (1u << 4u) | (1u << 7u);
    uint32_t reversed = (1u << (31u - 4u)) | (1u << (31u - 7u));
    EXPECT_EQ(reversed, gl::BitfieldReverse(bits));
}

// Test BitCount, which counts 1 bits in an integer.
TEST(MathUtilTest, BitCount)
{
    EXPECT_EQ(0, gl::BitCount(0u));
    EXPECT_EQ(32, gl::BitCount(0xFFFFFFFFu));
    EXPECT_EQ(10, gl::BitCount(0x17103121u));

#if defined(ANGLE_IS_64_BIT_CPU)
    EXPECT_EQ(0, gl::BitCount(static_cast<uint64_t>(0ull)));
    EXPECT_EQ(32, gl::BitCount(static_cast<uint64_t>(0xFFFFFFFFull)));
    EXPECT_EQ(10, gl::BitCount(static_cast<uint64_t>(0x17103121ull)));
#endif  // defined(ANGLE_IS_64_BIT_CPU)
}

// Test ScanForward, which scans for the least significant 1 bit from a non-zero integer.
TEST(MathUtilTest, ScanForward)
{
    EXPECT_EQ(0ul, gl::ScanForward(1u));
    EXPECT_EQ(16ul, gl::ScanForward(0x80010000u));
    EXPECT_EQ(31ul, gl::ScanForward(0x80000000u));

#if defined(ANGLE_IS_64_BIT_CPU)
    EXPECT_EQ(0ul, gl::ScanForward(static_cast<uint64_t>(1ull)));
    EXPECT_EQ(16ul, gl::ScanForward(static_cast<uint64_t>(0x80010000ull)));
    EXPECT_EQ(31ul, gl::ScanForward(static_cast<uint64_t>(0x80000000ull)));
#endif  // defined(ANGLE_IS_64_BIT_CPU)
}

// Test ScanReverse, which scans for the most significant 1 bit from a non-zero integer.
TEST(MathUtilTest, ScanReverse)
{
    EXPECT_EQ(0ul, gl::ScanReverse(1ul));
    EXPECT_EQ(16ul, gl::ScanReverse(0x00010030ul));
    EXPECT_EQ(31ul, gl::ScanReverse(0x80000000ul));
}

// Test FindLSB, which finds the least significant 1 bit.
TEST(MathUtilTest, FindLSB)
{
    EXPECT_EQ(-1, gl::FindLSB(0u));
    EXPECT_EQ(0, gl::FindLSB(1u));
    EXPECT_EQ(16, gl::FindLSB(0x80010000u));
    EXPECT_EQ(31, gl::FindLSB(0x80000000u));
}

// Test FindMSB, which finds the most significant 1 bit.
TEST(MathUtilTest, FindMSB)
{
    EXPECT_EQ(-1, gl::FindMSB(0u));
    EXPECT_EQ(0, gl::FindMSB(1u));
    EXPECT_EQ(16, gl::FindMSB(0x00010030u));
    EXPECT_EQ(31, gl::FindMSB(0x80000000u));
}

// Test Ldexp, which combines mantissa and exponent into a floating-point number.
TEST(MathUtilTest, Ldexp)
{
    EXPECT_EQ(2.5f, Ldexp(0.625f, 2));
    EXPECT_EQ(-5.0f, Ldexp(-0.625f, 3));
    EXPECT_EQ(std::numeric_limits<float>::infinity(), Ldexp(0.625f, 129));
    EXPECT_EQ(0.0f, Ldexp(1.0f, -129));
}

// Test that Range::extend works as expected.
TEST(MathUtilTest, RangeExtend)
{
    RangeI range(0, 0);

    range.extend(5);
    EXPECT_EQ(0, range.low());
    EXPECT_EQ(6, range.high());
    EXPECT_EQ(6, range.length());

    range.extend(-1);
    EXPECT_EQ(-1, range.low());
    EXPECT_EQ(6, range.high());
    EXPECT_EQ(7, range.length());

    range.extend(10);
    EXPECT_EQ(-1, range.low());
    EXPECT_EQ(11, range.high());
    EXPECT_EQ(12, range.length());
}

// Test that Range iteration works as expected.
TEST(MathUtilTest, RangeIteration)
{
    RangeI range(0, 10);
    int expected = 0;
    for (int value : range)
    {
        EXPECT_EQ(expected, value);
        expected++;
    }
    EXPECT_EQ(range.length(), expected);
}

}  // anonymous namespace
kc3-lang/angle/src/common/mathutil_unittest.cpp

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kc3-lang/angle /src/common/mathutil_unittest.cpp
