1 //===-- Utility class to test different flavors of fdim ---------*- 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 #include "hdr/math_macros.h" 10 #include "src/__support/FPUtil/BasicOperations.h" 11 #include "src/__support/FPUtil/FPBits.h" 12 #include "test/UnitTest/FEnvSafeTest.h" 13 #include "test/UnitTest/FPMatcher.h" 14 #include "test/UnitTest/Test.h" 15 16 template <typename T> 17 class FDimTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest { 18 public: 19 using FuncPtr = T (*)(T, T); 20 using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>; 21 using StorageType = typename FPBits::StorageType; 22 23 const T inf = FPBits::inf(Sign::POS).get_val(); 24 const T neg_inf = FPBits::inf(Sign::NEG).get_val(); 25 const T zero = FPBits::zero(Sign::POS).get_val(); 26 const T neg_zero = FPBits::zero(Sign::NEG).get_val(); 27 const T nan = FPBits::quiet_nan().get_val(); 28 test_na_n_arg(FuncPtr func)29 void test_na_n_arg(FuncPtr func) { 30 EXPECT_FP_EQ(nan, func(nan, inf)); 31 EXPECT_FP_EQ(nan, func(neg_inf, nan)); 32 EXPECT_FP_EQ(nan, func(nan, zero)); 33 EXPECT_FP_EQ(nan, func(neg_zero, nan)); 34 EXPECT_FP_EQ(nan, func(nan, T(-1.2345))); 35 EXPECT_FP_EQ(nan, func(T(1.2345), nan)); 36 EXPECT_FP_EQ(func(nan, nan), nan); 37 } 38 test_inf_arg(FuncPtr func)39 void test_inf_arg(FuncPtr func) { 40 EXPECT_FP_EQ(zero, func(neg_inf, inf)); 41 EXPECT_FP_EQ(inf, func(inf, zero)); 42 EXPECT_FP_EQ(zero, func(neg_zero, inf)); 43 EXPECT_FP_EQ(inf, func(inf, T(1.2345))); 44 EXPECT_FP_EQ(zero, func(T(-1.2345), inf)); 45 } 46 test_neg_inf_arg(FuncPtr func)47 void test_neg_inf_arg(FuncPtr func) { 48 EXPECT_FP_EQ(inf, func(inf, neg_inf)); 49 EXPECT_FP_EQ(zero, func(neg_inf, zero)); 50 EXPECT_FP_EQ(inf, func(neg_zero, neg_inf)); 51 EXPECT_FP_EQ(zero, func(neg_inf, T(-1.2345))); 52 EXPECT_FP_EQ(inf, func(T(1.2345), neg_inf)); 53 } 54 test_both_zero(FuncPtr func)55 void test_both_zero(FuncPtr func) { 56 EXPECT_FP_EQ(zero, func(zero, zero)); 57 EXPECT_FP_EQ(zero, func(zero, neg_zero)); 58 EXPECT_FP_EQ(zero, func(neg_zero, zero)); 59 EXPECT_FP_EQ(zero, func(neg_zero, neg_zero)); 60 } 61 test_in_range(FuncPtr func)62 void test_in_range(FuncPtr func) { 63 constexpr StorageType STORAGE_MAX = 64 LIBC_NAMESPACE::cpp::numeric_limits<StorageType>::max(); 65 constexpr StorageType COUNT = 100'001; 66 constexpr StorageType STEP = STORAGE_MAX / COUNT; 67 for (StorageType i = 0, v = 0, w = STORAGE_MAX; i <= COUNT; 68 ++i, v += STEP, w -= STEP) { 69 T x = FPBits(v).get_val(), y = FPBits(w).get_val(); 70 if (isnan(x) || isinf(x)) 71 continue; 72 if (isnan(y) || isinf(y)) 73 continue; 74 75 if (x > y) { 76 EXPECT_FP_EQ(x - y, func(x, y)); 77 } else { 78 EXPECT_FP_EQ(zero, func(x, y)); 79 } 80 } 81 } 82 }; 83