mathutil_unittest.cpp

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Author : Arun Patole
Date : 2015-07-07 18:18:23
Hash : 551279e5
Message : Support constant folding of more common built-ins This change adds const folding support for below mentioned common built-ins: - isnan, ininf, floatBitsToInt, floatBitsToUint, intBitsToFloat and uintBitsToFloat BUG=angleproject:913 TEST=angle_unittests(new: MathUtilTest.isNan/inInf), dEQP Tests dEQP-GLES3.functional.shaders.constant_expressions.builtin_functions.common.* (20 more tests started passing with this change) Change-Id: Ifdedb251cd8b183b4999314c0f5de857bc20702f Reviewed-on: https://chromium-review.googlesource.com/283767 Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Tested-by: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: 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 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)));
}

}

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

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