97 lines · c
1//===-- Utility class to test logb[f|l] -------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/__support/FPUtil/ManipulationFunctions.h"10#include "test/UnitTest/FEnvSafeTest.h"11#include "test/UnitTest/FPMatcher.h"12#include "test/UnitTest/Test.h"13#include "utils/MPFRWrapper/MPFRUtils.h"14 15#include "hdr/math_macros.h"16 17namespace mpfr = LIBC_NAMESPACE::testing::mpfr;18 19template <typename T>20class LogbTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {21 22 DECLARE_SPECIAL_CONSTANTS(T)23 24 static constexpr StorageType HIDDEN_BIT =25 StorageType(1) << LIBC_NAMESPACE::fputil::FPBits<T>::FRACTION_LEN;26 27public:28 typedef T (*LogbFunc)(T);29 30 void testSpecialNumbers(LogbFunc func) {31 ASSERT_FP_EQ(aNaN, func(aNaN));32 ASSERT_FP_EQ(inf, func(inf));33 ASSERT_FP_EQ(inf, func(neg_inf));34 ASSERT_FP_EQ(neg_inf, func(0.0));35 ASSERT_FP_EQ(neg_inf, func(-0.0));36 }37 38 void testPowersOfTwo(LogbFunc func) {39 EXPECT_FP_EQ(T(0.0), func(T(1.0)));40 EXPECT_FP_EQ(T(0.0), func(T(-1.0)));41 42 EXPECT_FP_EQ(T(1.0), func(T(2.0)));43 EXPECT_FP_EQ(T(1.0), func(T(-2.0)));44 45 EXPECT_FP_EQ(T(2.0), func(T(4.0)));46 EXPECT_FP_EQ(T(2.0), func(T(-4.0)));47 48 EXPECT_FP_EQ(T(3.0), func(T(8.0)));49 EXPECT_FP_EQ(T(3.0), func(T(-8.0)));50 51 EXPECT_FP_EQ(T(4.0), func(T(16.0)));52 EXPECT_FP_EQ(T(4.0), func(T(-16.0)));53 54 EXPECT_FP_EQ(T(5.0), func(T(32.0)));55 EXPECT_FP_EQ(T(5.0), func(T(-32.0)));56 }57 58 void testSomeIntegers(LogbFunc func) {59 EXPECT_FP_EQ(T(1.0), func(T(3.0)));60 EXPECT_FP_EQ(T(1.0), func(T(-3.0)));61 62 EXPECT_FP_EQ(T(2.0), func(T(7.0)));63 EXPECT_FP_EQ(T(2.0), func(T(-7.0)));64 65 EXPECT_FP_EQ(T(3.0), func(T(10.0)));66 EXPECT_FP_EQ(T(3.0), func(T(-10.0)));67 68 EXPECT_FP_EQ(T(4.0), func(T(31.0)));69 EXPECT_FP_EQ(T(4.0), func(T(-31.0)));70 71 EXPECT_FP_EQ(T(5.0), func(T(55.0)));72 EXPECT_FP_EQ(T(5.0), func(T(-55.0)));73 }74 75 void testRange(LogbFunc func) {76 using StorageType = typename FPBits::StorageType;77 constexpr StorageType COUNT = 100'000;78 constexpr StorageType STEP = STORAGE_MAX / COUNT;79 for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) {80 T x = FPBits(v).get_val();81 if (FPBits(v).is_nan() || FPBits(v).is_inf() || x == 0.0l)82 continue;83 84 int exponent;85 LIBC_NAMESPACE::fputil::frexp(x, exponent);86 ASSERT_FP_EQ(T(exponent), func(x) + T(1.0));87 }88 }89};90 91#define LIST_LOGB_TESTS(T, func) \92 using LlvmLibcLogbTest = LogbTest<T>; \93 TEST_F(LlvmLibcLogbTest, SpecialNumbers) { testSpecialNumbers(&func); } \94 TEST_F(LlvmLibcLogbTest, PowersOfTwo) { testPowersOfTwo(&func); } \95 TEST_F(LlvmLibcLogbTest, SomeIntegers) { testSomeIntegers(&func); } \96 TEST_F(LlvmLibcLogbTest, InRange) { testRange(&func); }97