| //===-- Utility class to test logb[f|l] -------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/__support/CPP/algorithm.h" |
| #include "src/__support/FPUtil/ManipulationFunctions.h" |
| #include "test/UnitTest/FEnvSafeTest.h" |
| #include "test/UnitTest/FPMatcher.h" |
| #include "test/UnitTest/Test.h" |
| |
| template <typename T> |
| class LogbTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { |
| |
| DECLARE_SPECIAL_CONSTANTS(T) |
| |
| static constexpr StorageType HIDDEN_BIT = |
| StorageType(1) << LIBC_NAMESPACE::fputil::FPBits<T>::FRACTION_LEN; |
| |
| public: |
| typedef T (*LogbFunc)(T); |
| |
| void testSpecialNumbers(LogbFunc func) { |
| ASSERT_FP_EQ(aNaN, func(aNaN)); |
| ASSERT_FP_EQ(inf, func(inf)); |
| ASSERT_FP_EQ(inf, func(neg_inf)); |
| ASSERT_FP_EQ(neg_inf, func(0.0)); |
| ASSERT_FP_EQ(neg_inf, func(-0.0)); |
| } |
| |
| void testPowersOfTwo(LogbFunc func) { |
| EXPECT_FP_EQ(T(0.0), func(T(1.0))); |
| EXPECT_FP_EQ(T(0.0), func(T(-1.0))); |
| |
| EXPECT_FP_EQ(T(1.0), func(T(2.0))); |
| EXPECT_FP_EQ(T(1.0), func(T(-2.0))); |
| |
| EXPECT_FP_EQ(T(2.0), func(T(4.0))); |
| EXPECT_FP_EQ(T(2.0), func(T(-4.0))); |
| |
| EXPECT_FP_EQ(T(3.0), func(T(8.0))); |
| EXPECT_FP_EQ(T(3.0), func(T(-8.0))); |
| |
| EXPECT_FP_EQ(T(4.0), func(T(16.0))); |
| EXPECT_FP_EQ(T(4.0), func(T(-16.0))); |
| |
| EXPECT_FP_EQ(T(5.0), func(T(32.0))); |
| EXPECT_FP_EQ(T(5.0), func(T(-32.0))); |
| } |
| |
| void testSomeIntegers(LogbFunc func) { |
| EXPECT_FP_EQ(T(1.0), func(T(3.0))); |
| EXPECT_FP_EQ(T(1.0), func(T(-3.0))); |
| |
| EXPECT_FP_EQ(T(2.0), func(T(7.0))); |
| EXPECT_FP_EQ(T(2.0), func(T(-7.0))); |
| |
| EXPECT_FP_EQ(T(3.0), func(T(10.0))); |
| EXPECT_FP_EQ(T(3.0), func(T(-10.0))); |
| |
| EXPECT_FP_EQ(T(4.0), func(T(31.0))); |
| EXPECT_FP_EQ(T(4.0), func(T(-31.0))); |
| |
| EXPECT_FP_EQ(T(5.0), func(T(55.0))); |
| EXPECT_FP_EQ(T(5.0), func(T(-55.0))); |
| } |
| |
| void testRange(LogbFunc func) { |
| using StorageType = typename FPBits::StorageType; |
| constexpr int COUNT = 100'000; |
| constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max( |
| static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1)); |
| StorageType v = 0; |
| for (int i = 0; i <= COUNT; ++i, v += STEP) { |
| FPBits x_bits(v); |
| if (x_bits.is_zero() || x_bits.is_inf_or_nan()) |
| continue; |
| |
| T x = x_bits.get_val(); |
| |
| int exponent; |
| LIBC_NAMESPACE::fputil::frexp(x, exponent); |
| ASSERT_FP_EQ(T(exponent), func(x) + T(1.0)); |
| } |
| } |
| }; |
| |
| #define LIST_LOGB_TESTS(T, func) \ |
| using LlvmLibcLogbTest = LogbTest<T>; \ |
| TEST_F(LlvmLibcLogbTest, SpecialNumbers) { testSpecialNumbers(&func); } \ |
| TEST_F(LlvmLibcLogbTest, PowersOfTwo) { testPowersOfTwo(&func); } \ |
| TEST_F(LlvmLibcLogbTest, SomeIntegers) { testSomeIntegers(&func); } \ |
| TEST_F(LlvmLibcLogbTest, InRange) { testRange(&func); } |