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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_TEST_SRC_MATH_SUBTEST_H10#define LLVM_LIBC_TEST_SRC_MATH_SUBTEST_H11 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 18namespace mpfr = LIBC_NAMESPACE::testing::mpfr;19 20template <typename OutType, typename InType>21class 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 39public:40 using SubFunc = OutType (*)(InType, InType);41 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_H88