1 //===-- Utility class to test fmin[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_FMAXTEST_H 10 #define LLVM_LIBC_TEST_SRC_MATH_FMAXTEST_H 11 12 #include "test/UnitTest/FEnvSafeTest.h" 13 #include "test/UnitTest/FPMatcher.h" 14 #include "test/UnitTest/Test.h" 15 #include "utils/MPFRWrapper/MPFRUtils.h" 16 17 #include "hdr/math_macros.h" 18 19 namespace mpfr = LIBC_NAMESPACE::testing::mpfr; 20 21 template <typename T> 22 class FMaxTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { 23 24 DECLARE_SPECIAL_CONSTANTS(T) 25 26 public: 27 typedef T (*FMaxFunc)(T, T); 28 testNaN(FMaxFunc func)29 void testNaN(FMaxFunc func) { 30 EXPECT_FP_EQ(inf, func(aNaN, inf)); 31 EXPECT_FP_EQ(neg_inf, func(neg_inf, aNaN)); 32 EXPECT_FP_EQ(0.0, func(aNaN, 0.0)); 33 EXPECT_FP_EQ(-0.0, func(-0.0, aNaN)); 34 EXPECT_FP_EQ(T(-1.2345), func(aNaN, T(-1.2345))); 35 EXPECT_FP_EQ(T(1.2345), func(T(1.2345), aNaN)); 36 EXPECT_FP_EQ(aNaN, func(aNaN, aNaN)); 37 } 38 testInfArg(FMaxFunc func)39 void testInfArg(FMaxFunc func) { 40 EXPECT_FP_EQ(inf, func(neg_inf, inf)); 41 EXPECT_FP_EQ(inf, func(inf, 0.0)); 42 EXPECT_FP_EQ(inf, func(-0.0, inf)); 43 EXPECT_FP_EQ(inf, func(inf, T(1.2345))); 44 EXPECT_FP_EQ(inf, func(T(-1.2345), inf)); 45 } 46 testNegInfArg(FMaxFunc func)47 void testNegInfArg(FMaxFunc func) { 48 EXPECT_FP_EQ(inf, func(inf, neg_inf)); 49 EXPECT_FP_EQ(0.0, func(neg_inf, 0.0)); 50 EXPECT_FP_EQ(-0.0, func(-0.0, neg_inf)); 51 EXPECT_FP_EQ(T(-1.2345), func(neg_inf, T(-1.2345))); 52 EXPECT_FP_EQ(T(1.2345), func(T(1.2345), neg_inf)); 53 } 54 testBothZero(FMaxFunc func)55 void testBothZero(FMaxFunc func) { 56 EXPECT_FP_EQ(0.0, func(0.0, 0.0)); 57 EXPECT_FP_EQ(0.0, func(-0.0, 0.0)); 58 EXPECT_FP_EQ(0.0, func(0.0, -0.0)); 59 EXPECT_FP_EQ(-0.0, func(-0.0, -0.0)); 60 } 61 testRange(FMaxFunc func)62 void testRange(FMaxFunc func) { 63 constexpr StorageType COUNT = 100'001; 64 constexpr StorageType STEP = STORAGE_MAX / COUNT; 65 for (StorageType i = 0, v = 0, w = STORAGE_MAX; i <= COUNT; 66 ++i, v += STEP, w -= STEP) { 67 T x = FPBits(v).get_val(), y = FPBits(w).get_val(); 68 if (FPBits(v).is_nan() || FPBits(v).is_inf()) 69 continue; 70 if (FPBits(w).is_nan() || FPBits(w).is_inf()) 71 continue; 72 if ((x == 0) && (y == 0)) 73 continue; 74 75 if (x > y) { 76 EXPECT_FP_EQ(x, func(x, y)); 77 } else { 78 EXPECT_FP_EQ(y, func(x, y)); 79 } 80 } 81 } 82 }; 83 84 #define LIST_FMAX_TESTS(T, func) \ 85 using LlvmLibcFMaxTest = FMaxTest<T>; \ 86 TEST_F(LlvmLibcFMaxTest, NaN) { testNaN(&func); } \ 87 TEST_F(LlvmLibcFMaxTest, InfArg) { testInfArg(&func); } \ 88 TEST_F(LlvmLibcFMaxTest, NegInfArg) { testNegInfArg(&func); } \ 89 TEST_F(LlvmLibcFMaxTest, BothZero) { testBothZero(&func); } \ 90 TEST_F(LlvmLibcFMaxTest, Range) { testRange(&func); } 91 92 #endif // LLVM_LIBC_TEST_SRC_MATH_FMAXTEST_H 93