1 //===-- Utility class to test different flavors of float sub ----*- 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_SUBTEST_H 10 #define LLVM_LIBC_TEST_SRC_MATH_SUBTEST_H 11 12 #include "src/__support/CPP/algorithm.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 namespace mpfr = LIBC_NAMESPACE::testing::mpfr; 19 20 template <typename OutType, typename InType> 21 class SubTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { 22 23 struct InConstants { 24 DECLARE_SPECIAL_CONSTANTS(InType) 25 }; 26 27 using InFPBits = typename InConstants::FPBits; 28 using InStorageType = typename InConstants::StorageType; 29 30 static constexpr InStorageType IN_MAX_NORMAL_U = 31 InFPBits::max_normal().uintval(); 32 static constexpr InStorageType IN_MIN_NORMAL_U = 33 InFPBits::min_normal().uintval(); 34 static constexpr InStorageType IN_MAX_SUBNORMAL_U = 35 InFPBits::max_subnormal().uintval(); 36 static constexpr InStorageType IN_MIN_SUBNORMAL_U = 37 InFPBits::min_subnormal().uintval(); 38 39 public: 40 using SubFunc = OutType (*)(InType, InType); 41 test_subnormal_range(SubFunc func)42 void test_subnormal_range(SubFunc func) { 43 constexpr int COUNT = 100'001; 44 constexpr InStorageType STEP = LIBC_NAMESPACE::cpp::max( 45 static_cast<InStorageType>((IN_MAX_SUBNORMAL_U - IN_MIN_SUBNORMAL_U) / 46 COUNT), 47 InStorageType(1)); 48 for (InStorageType i = IN_MIN_SUBNORMAL_U; i <= IN_MAX_SUBNORMAL_U; 49 i += STEP) { 50 InType x = InFPBits(i).get_val(); 51 InType y = InFPBits(static_cast<InStorageType>(IN_MAX_SUBNORMAL_U - i)) 52 .get_val(); 53 mpfr::BinaryInput<InType> input{x, y}; 54 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sub, input, func(x, y), 55 0.5); 56 } 57 } 58 59 void test_normal_range(SubFunc func) { 60 constexpr int COUNT = 100'001; 61 constexpr InStorageType STEP = LIBC_NAMESPACE::cpp::max( 62 static_cast<InStorageType>((IN_MAX_NORMAL_U - IN_MIN_NORMAL_U) / COUNT), 63 InStorageType(1)); 64 for (InStorageType i = IN_MIN_NORMAL_U; i <= IN_MAX_NORMAL_U; i += STEP) { 65 InType x = InFPBits(i).get_val(); 66 InType y = 67 InFPBits(static_cast<InStorageType>(IN_MAX_NORMAL_U - i)).get_val(); 68 mpfr::BinaryInput<InType> input{x, y}; 69 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sub, input, func(x, y), 70 0.5); 71 } 72 } 73 }; 74 75 #define LIST_SUB_TESTS(OutType, InType, func) \ 76 using LlvmLibcSubTest = SubTest<OutType, InType>; \ 77 TEST_F(LlvmLibcSubTest, SubnormalRange) { test_subnormal_range(&func); } \ 78 TEST_F(LlvmLibcSubTest, NormalRange) { test_normal_range(&func); } 79 80 #define LIST_SUB_SAME_TYPE_TESTS(suffix, OutType, InType, func) \ 81 using LlvmLibcSubTest##suffix = SubTest<OutType, InType>; \ 82 TEST_F(LlvmLibcSubTest##suffix, SubnormalRange) { \ 83 test_subnormal_range(&func); \ 84 } \ 85 TEST_F(LlvmLibcSubTest##suffix, NormalRange) { test_normal_range(&func); } 86 87 #endif // LLVM_LIBC_TEST_SRC_MATH_SUBTEST_H 88