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_FMINTEST_H 10 #define LLVM_LIBC_TEST_SRC_MATH_FMINTEST_H 11 12 #include "src/__support/FPUtil/FPBits.h" 13 #include "test/UnitTest/FEnvSafeTest.h" 14 #include "test/UnitTest/FPMatcher.h" 15 #include "test/UnitTest/Test.h" 16 #include "utils/MPFRWrapper/MPFRUtils.h" 17 18 #include "hdr/math_macros.h" 19 20 namespace mpfr = LIBC_NAMESPACE::testing::mpfr; 21 22 template <typename T> 23 class FMinTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { 24 25 DECLARE_SPECIAL_CONSTANTS(T) 26 27 public: 28 typedef T (*FMinFunc)(T, T); 29 testNaN(FMinFunc func)30 void testNaN(FMinFunc func) { 31 EXPECT_FP_EQ(inf, func(aNaN, inf)); 32 EXPECT_FP_EQ(neg_inf, func(neg_inf, aNaN)); 33 EXPECT_FP_EQ(0.0, func(aNaN, 0.0)); 34 EXPECT_FP_EQ(-0.0, func(-0.0, aNaN)); 35 EXPECT_FP_EQ(T(-1.2345), func(aNaN, T(-1.2345))); 36 EXPECT_FP_EQ(T(1.2345), func(T(1.2345), aNaN)); 37 EXPECT_FP_EQ(aNaN, func(aNaN, aNaN)); 38 } 39 testInfArg(FMinFunc func)40 void testInfArg(FMinFunc func) { 41 EXPECT_FP_EQ(neg_inf, func(neg_inf, inf)); 42 EXPECT_FP_EQ(0.0, func(inf, 0.0)); 43 EXPECT_FP_EQ(-0.0, func(-0.0, inf)); 44 EXPECT_FP_EQ(T(1.2345), func(inf, T(1.2345))); 45 EXPECT_FP_EQ(T(-1.2345), func(T(-1.2345), inf)); 46 } 47 testNegInfArg(FMinFunc func)48 void testNegInfArg(FMinFunc func) { 49 EXPECT_FP_EQ(neg_inf, func(inf, neg_inf)); 50 EXPECT_FP_EQ(neg_inf, func(neg_inf, 0.0)); 51 EXPECT_FP_EQ(neg_inf, func(-0.0, neg_inf)); 52 EXPECT_FP_EQ(neg_inf, func(neg_inf, T(-1.2345))); 53 EXPECT_FP_EQ(neg_inf, func(T(1.2345), neg_inf)); 54 } 55 testBothZero(FMinFunc func)56 void testBothZero(FMinFunc func) { 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 EXPECT_FP_EQ(-0.0, func(-0.0, -0.0)); 61 } 62 testRange(FMinFunc func)63 void testRange(FMinFunc func) { 64 constexpr StorageType COUNT = 100'001; 65 constexpr StorageType STEP = STORAGE_MAX / COUNT; 66 for (StorageType i = 0, v = 0, w = STORAGE_MAX; i <= COUNT; 67 ++i, v += STEP, w -= STEP) { 68 T x = FPBits(v).get_val(), y = FPBits(w).get_val(); 69 if (FPBits(v).is_nan() || FPBits(v).is_inf()) 70 continue; 71 if (FPBits(w).is_nan() || FPBits(w).is_inf()) 72 continue; 73 if ((x == 0) && (y == 0)) 74 continue; 75 76 if (x > y) { 77 EXPECT_FP_EQ(y, func(x, y)); 78 } else { 79 EXPECT_FP_EQ(x, func(x, y)); 80 } 81 } 82 } 83 }; 84 85 #define LIST_FMIN_TESTS(T, func) \ 86 using LlvmLibcFMinTest = FMinTest<T>; \ 87 TEST_F(LlvmLibcFMinTest, NaN) { testNaN(&func); } \ 88 TEST_F(LlvmLibcFMinTest, InfArg) { testInfArg(&func); } \ 89 TEST_F(LlvmLibcFMinTest, NegInfArg) { testNegInfArg(&func); } \ 90 TEST_F(LlvmLibcFMinTest, BothZero) { testBothZero(&func); } \ 91 TEST_F(LlvmLibcFMinTest, Range) { testRange(&func); } 92 93 #endif // LLVM_LIBC_TEST_SRC_MATH_FMINTEST_H 94