| //===-- 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/FPUtil/ManipulationFunctions.h" |
| #include "utils/MPFRWrapper/MPFRUtils.h" |
| #include "utils/UnitTest/FPMatcher.h" |
| #include "utils/UnitTest/Test.h" |
| |
| #include <math.h> |
| |
| namespace mpfr = __llvm_libc::testing::mpfr; |
| |
| template <typename T> class LogbTest : public __llvm_libc::testing::Test { |
| |
| DECLARE_SPECIAL_CONSTANTS(T) |
| |
| static constexpr UIntType HIDDEN_BIT = |
| UIntType(1) << __llvm_libc::fputil::MantissaWidth<T>::VALUE; |
| |
| 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 UIntType = typename FPBits::UIntType; |
| constexpr UIntType COUNT = 10000000; |
| constexpr UIntType STEP = UIntType(-1) / COUNT; |
| for (UIntType i = 0, v = 0; i <= COUNT; ++i, v += STEP) { |
| T x = static_cast<T>(FPBits(v)); |
| if (isnan(x) || isinf(x) || x == 0.0l) |
| continue; |
| |
| int exponent; |
| __llvm_libc::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); } |