| // Copyright 2017 The Dawn Authors | |
| // | |
| // 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 "common/Math.h" | |
| #include "dawn/EnumClassBitmasks.h" | |
| #include <cmath> | |
| namespace wgpu { | |
| enum class TestEnum { | |
| A = 0x1, | |
| B = 0x2, | |
| C = 0x4, | |
| }; | |
| } // namespace wgpu | |
| template <> | |
| struct wgpu::IsDawnBitmask<wgpu::TestEnum> { | |
| static constexpr bool enable = true; | |
| }; | |
| // Tests for ScanForward | |
| TEST(Math, ScanForward) { | |
| // Test extrema | |
| ASSERT_EQ(ScanForward(1), 0u); | |
| ASSERT_EQ(ScanForward(0x80000000), 31u); | |
| // Test with more than one bit set. | |
| ASSERT_EQ(ScanForward(256), 8u); | |
| ASSERT_EQ(ScanForward(256 + 32), 5u); | |
| ASSERT_EQ(ScanForward(1024 + 256 + 32), 5u); | |
| } | |
| // Tests for Log2 | |
| TEST(Math, Log2) { | |
| // Test extrema | |
| ASSERT_EQ(Log2(1u), 0u); | |
| ASSERT_EQ(Log2(0xFFFFFFFFu), 31u); | |
| ASSERT_EQ(Log2(static_cast<uint64_t>(0xFFFFFFFFFFFFFFFF)), 63u); | |
| static_assert(ConstexprLog2(1u) == 0u, ""); | |
| static_assert(ConstexprLog2(0xFFFFFFFFu) == 31u, ""); | |
| static_assert(ConstexprLog2(static_cast<uint64_t>(0xFFFFFFFFFFFFFFFF)) == 63u, ""); | |
| // Test boundary between two logs | |
| ASSERT_EQ(Log2(0x80000000u), 31u); | |
| ASSERT_EQ(Log2(0x7FFFFFFFu), 30u); | |
| ASSERT_EQ(Log2(static_cast<uint64_t>(0x8000000000000000)), 63u); | |
| ASSERT_EQ(Log2(static_cast<uint64_t>(0x7FFFFFFFFFFFFFFF)), 62u); | |
| static_assert(ConstexprLog2(0x80000000u) == 31u, ""); | |
| static_assert(ConstexprLog2(0x7FFFFFFFu) == 30u, ""); | |
| static_assert(ConstexprLog2(static_cast<uint64_t>(0x8000000000000000)) == 63u, ""); | |
| static_assert(ConstexprLog2(static_cast<uint64_t>(0x7FFFFFFFFFFFFFFF)) == 62u, ""); | |
| ASSERT_EQ(Log2(16u), 4u); | |
| ASSERT_EQ(Log2(15u), 3u); | |
| static_assert(ConstexprLog2(16u) == 4u, ""); | |
| static_assert(ConstexprLog2(15u) == 3u, ""); | |
| } | |
| // Tests for Log2Ceil | |
| TEST(Math, Log2Ceil) { | |
| // Test extrema | |
| ASSERT_EQ(Log2Ceil(1u), 0u); | |
| ASSERT_EQ(Log2Ceil(0xFFFFFFFFu), 32u); | |
| ASSERT_EQ(Log2Ceil(static_cast<uint64_t>(0xFFFFFFFFFFFFFFFF)), 64u); | |
| static_assert(ConstexprLog2Ceil(1u) == 0u, ""); | |
| static_assert(ConstexprLog2Ceil(0xFFFFFFFFu) == 32u, ""); | |
| static_assert(ConstexprLog2Ceil(static_cast<uint64_t>(0xFFFFFFFFFFFFFFFF)) == 64u, ""); | |
| // Test boundary between two logs | |
| ASSERT_EQ(Log2Ceil(0x80000001u), 32u); | |
| ASSERT_EQ(Log2Ceil(0x80000000u), 31u); | |
| ASSERT_EQ(Log2Ceil(0x7FFFFFFFu), 31u); | |
| ASSERT_EQ(Log2Ceil(static_cast<uint64_t>(0x8000000000000001)), 64u); | |
| ASSERT_EQ(Log2Ceil(static_cast<uint64_t>(0x8000000000000000)), 63u); | |
| ASSERT_EQ(Log2Ceil(static_cast<uint64_t>(0x7FFFFFFFFFFFFFFF)), 63u); | |
| static_assert(ConstexprLog2Ceil(0x80000001u) == 32u, ""); | |
| static_assert(ConstexprLog2Ceil(0x80000000u) == 31u, ""); | |
| static_assert(ConstexprLog2Ceil(0x7FFFFFFFu) == 31u, ""); | |
| static_assert(ConstexprLog2Ceil(static_cast<uint64_t>(0x8000000000000001)) == 64u, ""); | |
| static_assert(ConstexprLog2Ceil(static_cast<uint64_t>(0x8000000000000000)) == 63u, ""); | |
| static_assert(ConstexprLog2Ceil(static_cast<uint64_t>(0x7FFFFFFFFFFFFFFF)) == 63u, ""); | |
| ASSERT_EQ(Log2Ceil(17u), 5u); | |
| ASSERT_EQ(Log2Ceil(16u), 4u); | |
| ASSERT_EQ(Log2Ceil(15u), 4u); | |
| static_assert(ConstexprLog2Ceil(17u) == 5u, ""); | |
| static_assert(ConstexprLog2Ceil(16u) == 4u, ""); | |
| static_assert(ConstexprLog2Ceil(15u) == 4u, ""); | |
| } | |
| // Tests for IsPowerOfTwo | |
| TEST(Math, IsPowerOfTwo) { | |
| ASSERT_TRUE(IsPowerOfTwo(1)); | |
| ASSERT_TRUE(IsPowerOfTwo(2)); | |
| ASSERT_FALSE(IsPowerOfTwo(3)); | |
| ASSERT_TRUE(IsPowerOfTwo(0x8000000)); | |
| ASSERT_FALSE(IsPowerOfTwo(0x8000400)); | |
| } | |
| // Tests for NextPowerOfTwo | |
| TEST(Math, NextPowerOfTwo) { | |
| // Test extrema | |
| ASSERT_EQ(NextPowerOfTwo(0), 1ull); | |
| ASSERT_EQ(NextPowerOfTwo(0x7FFFFFFFFFFFFFFF), 0x8000000000000000); | |
| // Test boundary between powers-of-two. | |
| ASSERT_EQ(NextPowerOfTwo(31), 32ull); | |
| ASSERT_EQ(NextPowerOfTwo(33), 64ull); | |
| ASSERT_EQ(NextPowerOfTwo(32), 32ull); | |
| } | |
| // Tests for AlignPtr | |
| TEST(Math, AlignPtr) { | |
| constexpr size_t kTestAlignment = 8; | |
| char buffer[kTestAlignment * 4]; | |
| for (size_t i = 0; i < 2 * kTestAlignment; ++i) { | |
| char* unaligned = &buffer[i]; | |
| char* aligned = AlignPtr(unaligned, kTestAlignment); | |
| ASSERT_GE(aligned - unaligned, 0); | |
| ASSERT_LT(static_cast<size_t>(aligned - unaligned), kTestAlignment); | |
| ASSERT_EQ(reinterpret_cast<uintptr_t>(aligned) & (kTestAlignment - 1), 0u); | |
| } | |
| } | |
| // Tests for Align | |
| TEST(Math, Align) { | |
| // 0 aligns to 0 | |
| ASSERT_EQ(Align(0u, 4), 0u); | |
| ASSERT_EQ(Align(0u, 256), 0u); | |
| ASSERT_EQ(Align(0u, 512), 0u); | |
| // Multiples align to self | |
| ASSERT_EQ(Align(8u, 8), 8u); | |
| ASSERT_EQ(Align(16u, 8), 16u); | |
| ASSERT_EQ(Align(24u, 8), 24u); | |
| ASSERT_EQ(Align(256u, 256), 256u); | |
| ASSERT_EQ(Align(512u, 256), 512u); | |
| ASSERT_EQ(Align(768u, 256), 768u); | |
| // Alignment with 1 is self | |
| for (uint32_t i = 0; i < 128; ++i) { | |
| ASSERT_EQ(Align(i, 1), i); | |
| } | |
| // Everything in the range (align, 2*align] aligns to 2*align | |
| for (uint32_t i = 1; i <= 64; ++i) { | |
| ASSERT_EQ(Align(64 + i, 64), 128u); | |
| } | |
| // Test extrema | |
| ASSERT_EQ(Align(static_cast<uint64_t>(0xFFFFFFFF), 4), 0x100000000u); | |
| ASSERT_EQ(Align(static_cast<uint64_t>(0xFFFFFFFFFFFFFFFF), 1), 0xFFFFFFFFFFFFFFFFull); | |
| } | |
| // Tests for IsPtrAligned | |
| TEST(Math, IsPtrAligned) { | |
| constexpr size_t kTestAlignment = 8; | |
| char buffer[kTestAlignment * 4]; | |
| for (size_t i = 0; i < 2 * kTestAlignment; ++i) { | |
| char* unaligned = &buffer[i]; | |
| char* aligned = AlignPtr(unaligned, kTestAlignment); | |
| ASSERT_EQ(IsPtrAligned(unaligned, kTestAlignment), unaligned == aligned); | |
| } | |
| } | |
| // Tests for IsAligned | |
| TEST(Math, IsAligned) { | |
| // 0 is aligned | |
| ASSERT_TRUE(IsAligned(0, 4)); | |
| ASSERT_TRUE(IsAligned(0, 256)); | |
| ASSERT_TRUE(IsAligned(0, 512)); | |
| // Multiples are aligned | |
| ASSERT_TRUE(IsAligned(8, 8)); | |
| ASSERT_TRUE(IsAligned(16, 8)); | |
| ASSERT_TRUE(IsAligned(24, 8)); | |
| ASSERT_TRUE(IsAligned(256, 256)); | |
| ASSERT_TRUE(IsAligned(512, 256)); | |
| ASSERT_TRUE(IsAligned(768, 256)); | |
| // Alignment with 1 is always aligned | |
| for (uint32_t i = 0; i < 128; ++i) { | |
| ASSERT_TRUE(IsAligned(i, 1)); | |
| } | |
| // Everything in the range (align, 2*align) is not aligned | |
| for (uint32_t i = 1; i < 64; ++i) { | |
| ASSERT_FALSE(IsAligned(64 + i, 64)); | |
| } | |
| } | |
| // Tests for float32 to float16 conversion | |
| TEST(Math, Float32ToFloat16) { | |
| ASSERT_EQ(Float32ToFloat16(0.0f), 0x0000); | |
| ASSERT_EQ(Float32ToFloat16(-0.0f), 0x8000); | |
| ASSERT_EQ(Float32ToFloat16(INFINITY), 0x7C00); | |
| ASSERT_EQ(Float32ToFloat16(-INFINITY), 0xFC00); | |
| // Check that NaN is converted to a value in one of the float16 NaN ranges | |
| uint16_t nan16 = Float32ToFloat16(NAN); | |
| ASSERT_TRUE(nan16 > 0xFC00 || (nan16 < 0x8000 && nan16 > 0x7C00)); | |
| ASSERT_EQ(Float32ToFloat16(1.0f), 0x3C00); | |
| } | |
| // Tests for IsFloat16NaN | |
| TEST(Math, IsFloat16NaN) { | |
| ASSERT_FALSE(IsFloat16NaN(0u)); | |
| ASSERT_FALSE(IsFloat16NaN(0u)); | |
| ASSERT_FALSE(IsFloat16NaN(Float32ToFloat16(1.0f))); | |
| ASSERT_FALSE(IsFloat16NaN(Float32ToFloat16(INFINITY))); | |
| ASSERT_FALSE(IsFloat16NaN(Float32ToFloat16(-INFINITY))); | |
| ASSERT_TRUE(IsFloat16NaN(Float32ToFloat16(INFINITY) + 1)); | |
| ASSERT_TRUE(IsFloat16NaN(Float32ToFloat16(-INFINITY) + 1)); | |
| ASSERT_TRUE(IsFloat16NaN(0x7FFF)); | |
| ASSERT_TRUE(IsFloat16NaN(0xFFFF)); | |
| } | |
| // Tests for SRGBToLinear | |
| TEST(Math, SRGBToLinear) { | |
| ASSERT_EQ(SRGBToLinear(0.0f), 0.0f); | |
| ASSERT_EQ(SRGBToLinear(1.0f), 1.0f); | |
| ASSERT_EQ(SRGBToLinear(-1.0f), 0.0f); | |
| ASSERT_EQ(SRGBToLinear(2.0f), 1.0f); | |
| ASSERT_FLOAT_EQ(SRGBToLinear(0.5f), 0.21404114f); | |
| } | |
| // Tests for RoundUp | |
| TEST(Math, RoundUp) { | |
| ASSERT_EQ(RoundUp(2, 2), 2u); | |
| ASSERT_EQ(RoundUp(2, 4), 4u); | |
| ASSERT_EQ(RoundUp(6, 2), 6u); | |
| ASSERT_EQ(RoundUp(8, 4), 8u); | |
| ASSERT_EQ(RoundUp(12, 6), 12u); | |
| ASSERT_EQ(RoundUp(3, 3), 3u); | |
| ASSERT_EQ(RoundUp(3, 5), 5u); | |
| ASSERT_EQ(RoundUp(5, 3), 6u); | |
| ASSERT_EQ(RoundUp(9, 5), 10u); | |
| // Test extrema | |
| ASSERT_EQ(RoundUp(0x7FFFFFFFFFFFFFFFull, 0x8000000000000000ull), 0x8000000000000000ull); | |
| ASSERT_EQ(RoundUp(1, 1), 1u); | |
| } | |
| // Tests for IsSubset | |
| TEST(Math, IsSubset) { | |
| // single value is a subset | |
| ASSERT_TRUE(IsSubset(0b100, 0b101)); | |
| ASSERT_FALSE(IsSubset(0b010, 0b101)); | |
| ASSERT_TRUE(IsSubset(0b001, 0b101)); | |
| // empty set is a subset | |
| ASSERT_TRUE(IsSubset(0b000, 0b101)); | |
| // equal-to is a subset | |
| ASSERT_TRUE(IsSubset(0b101, 0b101)); | |
| // superset is not a subset | |
| ASSERT_FALSE(IsSubset(0b111, 0b101)); | |
| // only empty is a subset of empty | |
| ASSERT_FALSE(IsSubset(0b100, 0b000)); | |
| ASSERT_FALSE(IsSubset(0b010, 0b000)); | |
| ASSERT_FALSE(IsSubset(0b001, 0b000)); | |
| ASSERT_TRUE(IsSubset(0b000, 0b000)); | |
| // Test with enums | |
| ASSERT_TRUE(IsSubset(wgpu::TestEnum::A, wgpu::TestEnum::A)); | |
| ASSERT_TRUE(IsSubset(wgpu::TestEnum::A, wgpu::TestEnum::A | wgpu::TestEnum::B)); | |
| ASSERT_FALSE(IsSubset(wgpu::TestEnum::C, wgpu::TestEnum::A | wgpu::TestEnum::B)); | |
| ASSERT_FALSE(IsSubset(wgpu::TestEnum::A | wgpu::TestEnum::C, wgpu::TestEnum::A)); | |
| } |