1 //===-- Utility class to test fmaximum_mag[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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_LIBC_TEST_SRC_MATH_SMOKE_FMAXIMUM_MAGTEST_H 10 #define LLVM_LIBC_TEST_SRC_MATH_SMOKE_FMAXIMUM_MAGTEST_H 11 12 #include "src/__support/CPP/algorithm.h" 13 #include "src/__support/FPUtil/BasicOperations.h" 14 #include "test/UnitTest/FEnvSafeTest.h" 15 #include "test/UnitTest/FPMatcher.h" 16 #include "test/UnitTest/Test.h" 17 18 template <typename T> 19 class FMaximumMagTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { 20 21 DECLARE_SPECIAL_CONSTANTS(T) 22 23 public: 24 typedef T (*FMaximumMagFunc)(T, T); 25 testNaN(FMaximumMagFunc func)26 void testNaN(FMaximumMagFunc func) { 27 EXPECT_FP_EQ(aNaN, func(aNaN, inf)); 28 EXPECT_FP_EQ(aNaN, func(neg_inf, aNaN)); 29 EXPECT_FP_EQ(aNaN, func(aNaN, zero)); 30 EXPECT_FP_EQ(aNaN, func(neg_zero, aNaN)); 31 EXPECT_FP_EQ(aNaN, func(aNaN, T(-1.2345))); 32 EXPECT_FP_EQ(aNaN, func(T(1.2345), aNaN)); 33 EXPECT_FP_EQ(aNaN, func(aNaN, aNaN)); 34 } 35 testInfArg(FMaximumMagFunc func)36 void testInfArg(FMaximumMagFunc func) { 37 EXPECT_FP_EQ(inf, func(neg_inf, inf)); 38 EXPECT_FP_EQ(inf, func(inf, zero)); 39 EXPECT_FP_EQ(inf, func(neg_zero, inf)); 40 EXPECT_FP_EQ(inf, func(inf, T(1.2345))); 41 EXPECT_FP_EQ(inf, func(T(-1.2345), inf)); 42 } 43 testNegInfArg(FMaximumMagFunc func)44 void testNegInfArg(FMaximumMagFunc func) { 45 EXPECT_FP_EQ(inf, func(inf, neg_inf)); 46 EXPECT_FP_EQ(neg_inf, func(neg_inf, zero)); 47 EXPECT_FP_EQ(neg_inf, func(neg_zero, neg_inf)); 48 EXPECT_FP_EQ(neg_inf, func(neg_inf, T(-1.2345))); 49 EXPECT_FP_EQ(neg_inf, func(T(1.2345), neg_inf)); 50 } 51 testBothZero(FMaximumMagFunc func)52 void testBothZero(FMaximumMagFunc func) { 53 EXPECT_FP_EQ(zero, func(zero, zero)); 54 EXPECT_FP_EQ(zero, func(neg_zero, zero)); 55 EXPECT_FP_EQ(zero, func(zero, neg_zero)); 56 EXPECT_FP_EQ(neg_zero, func(neg_zero, neg_zero)); 57 } 58 testRange(FMaximumMagFunc func)59 void testRange(FMaximumMagFunc func) { 60 constexpr int COUNT = 100'001; 61 constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max( 62 static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1)); 63 StorageType v = 0, w = STORAGE_MAX; 64 for (int i = 0; i <= COUNT; ++i, v += STEP, w -= STEP) { 65 FPBits xbits(v), ybits(w); 66 if (xbits.is_inf_or_nan()) 67 continue; 68 if (ybits.is_inf_or_nan()) 69 continue; 70 T x = xbits.get_val(); 71 T y = ybits.get_val(); 72 if ((x == 0) && (y == 0)) 73 continue; 74 75 if (LIBC_NAMESPACE::fputil::abs(x) > LIBC_NAMESPACE::fputil::abs(y)) 76 EXPECT_FP_EQ(x, func(x, y)); 77 else 78 EXPECT_FP_EQ(y, func(x, y)); 79 } 80 } 81 }; 82 83 #define LIST_FMAXIMUM_MAG_TESTS(T, func) \ 84 using LlvmLibcFMaximumMagTest = FMaximumMagTest<T>; \ 85 TEST_F(LlvmLibcFMaximumMagTest, NaN) { testNaN(&func); } \ 86 TEST_F(LlvmLibcFMaximumMagTest, InfArg) { testInfArg(&func); } \ 87 TEST_F(LlvmLibcFMaximumMagTest, NegInfArg) { testNegInfArg(&func); } \ 88 TEST_F(LlvmLibcFMaximumMagTest, BothZero) { testBothZero(&func); } \ 89 TEST_F(LlvmLibcFMaximumMagTest, Range) { testRange(&func); } 90 91 #endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_FMAXIMUM_MAGTEST_H 92