1bb8b656a9
Fixes incorrect logic that went unnoticed until the function was tested with output and input types that have the same underlying floating-point format.
88 lines
3.5 KiB
C++
88 lines
3.5 KiB
C++
//===-- Utility class to test different flavors of float add ----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIBC_TEST_SRC_MATH_ADDTEST_H
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#define LLVM_LIBC_TEST_SRC_MATH_ADDTEST_H
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#include "src/__support/CPP/algorithm.h"
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#include "test/UnitTest/FEnvSafeTest.h"
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#include "test/UnitTest/FPMatcher.h"
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#include "test/UnitTest/Test.h"
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#include "utils/MPFRWrapper/MPFRUtils.h"
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namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
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template <typename OutType, typename InType>
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class AddTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
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struct InConstants {
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DECLARE_SPECIAL_CONSTANTS(InType)
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};
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using InFPBits = typename InConstants::FPBits;
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using InStorageType = typename InConstants::StorageType;
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static constexpr InStorageType IN_MAX_NORMAL_U =
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InFPBits::max_normal().uintval();
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static constexpr InStorageType IN_MIN_NORMAL_U =
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InFPBits::min_normal().uintval();
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static constexpr InStorageType IN_MAX_SUBNORMAL_U =
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InFPBits::max_subnormal().uintval();
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static constexpr InStorageType IN_MIN_SUBNORMAL_U =
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InFPBits::min_subnormal().uintval();
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public:
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using AddFunc = OutType (*)(InType, InType);
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void test_subnormal_range(AddFunc func) {
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constexpr int COUNT = 100'001;
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constexpr InStorageType STEP = LIBC_NAMESPACE::cpp::max(
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static_cast<InStorageType>((IN_MAX_SUBNORMAL_U - IN_MIN_SUBNORMAL_U) /
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COUNT),
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InStorageType(1));
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for (InStorageType i = IN_MIN_SUBNORMAL_U; i <= IN_MAX_SUBNORMAL_U;
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i += STEP) {
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InType x = InFPBits(i).get_val();
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InType y = InFPBits(static_cast<InStorageType>(IN_MAX_SUBNORMAL_U - i))
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.get_val();
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mpfr::BinaryInput<InType> input{x, y};
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EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Add, input, func(x, y),
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0.5);
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}
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}
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void test_normal_range(AddFunc func) {
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constexpr int COUNT = 100'001;
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constexpr InStorageType STEP = LIBC_NAMESPACE::cpp::max(
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static_cast<InStorageType>((IN_MAX_NORMAL_U - IN_MIN_NORMAL_U) / COUNT),
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InStorageType(1));
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for (InStorageType i = IN_MIN_NORMAL_U; i <= IN_MAX_NORMAL_U; i += STEP) {
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InType x = InFPBits(i).get_val();
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InType y =
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InFPBits(static_cast<InStorageType>(IN_MAX_NORMAL_U - i)).get_val();
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mpfr::BinaryInput<InType> input{x, y};
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EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Add, input, func(x, y),
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0.5);
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}
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}
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};
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#define LIST_ADD_TESTS(OutType, InType, func) \
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using LlvmLibcAddTest = AddTest<OutType, InType>; \
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TEST_F(LlvmLibcAddTest, SubnormalRange) { test_subnormal_range(&func); } \
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TEST_F(LlvmLibcAddTest, NormalRange) { test_normal_range(&func); }
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#define LIST_ADD_SAME_TYPE_TESTS(suffix, OutType, InType, func) \
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using LlvmLibcAddTest##suffix = AddTest<OutType, InType>; \
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TEST_F(LlvmLibcAddTest##suffix, SubnormalRange) { \
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test_subnormal_range(&func); \
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} \
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TEST_F(LlvmLibcAddTest##suffix, NormalRange) { test_normal_range(&func); }
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#endif // LLVM_LIBC_TEST_SRC_MATH_ADDTEST_H
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