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1//===-- Utility class to test roundeven[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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_TEST_SRC_MATH_ROUNDEVENTEST_H10#define LLVM_LIBC_TEST_SRC_MATH_ROUNDEVENTEST_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 18#include "hdr/math_macros.h"19 20namespace mpfr = LIBC_NAMESPACE::testing::mpfr;21 22template <typename T>23class RoundEvenTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {24 25 DECLARE_SPECIAL_CONSTANTS(T)26 27public:28 typedef T (*RoundEvenFunc)(T);29 30 void testSpecialNumbers(RoundEvenFunc func) {31 EXPECT_FP_EQ(zero, func(zero));32 EXPECT_FP_EQ(neg_zero, func(neg_zero));33 34 EXPECT_FP_EQ(inf, func(inf));35 EXPECT_FP_EQ(neg_inf, func(neg_inf));36 37 EXPECT_FP_EQ(aNaN, func(aNaN));38 }39 40 void testRoundedNumbers(RoundEvenFunc func) {41 EXPECT_FP_EQ(T(1.0), func(T(1.0)));42 EXPECT_FP_EQ(T(-1.0), func(T(-1.0)));43 EXPECT_FP_EQ(T(10.0), func(T(10.0)));44 EXPECT_FP_EQ(T(-10.0), func(T(-10.0)));45 EXPECT_FP_EQ(T(1234.0), func(T(1234.0)));46 EXPECT_FP_EQ(T(-1234.0), func(T(-1234.0)));47 }48 49 void testFractions(RoundEvenFunc func) {50 EXPECT_FP_EQ(T(0.0), func(T(0.5)));51 EXPECT_FP_EQ(T(-0.0), func(T(-0.5)));52 EXPECT_FP_EQ(T(0.0), func(T(0.115)));53 EXPECT_FP_EQ(T(-0.0), func(T(-0.115)));54 EXPECT_FP_EQ(T(1.0), func(T(0.715)));55 EXPECT_FP_EQ(T(-1.0), func(T(-0.715)));56 EXPECT_FP_EQ(T(1.0), func(T(1.3)));57 EXPECT_FP_EQ(T(-1.0), func(T(-1.3)));58 EXPECT_FP_EQ(T(2.0), func(T(1.5)));59 EXPECT_FP_EQ(T(-2.0), func(T(-1.5)));60 EXPECT_FP_EQ(T(2.0), func(T(1.75)));61 EXPECT_FP_EQ(T(-2.0), func(T(-1.75)));62 EXPECT_FP_EQ(T(11.0), func(T(10.65)));63 EXPECT_FP_EQ(T(-11.0), func(T(-10.65)));64 EXPECT_FP_EQ(T(123.0), func(T(123.25)));65 EXPECT_FP_EQ(T(124.0), func(T(123.50)));66 EXPECT_FP_EQ(T(124.0), func(T(123.75)));67 EXPECT_FP_EQ(T(-123.0), func(T(-123.25)));68 EXPECT_FP_EQ(T(-124.0), func(T(-123.50)));69 EXPECT_FP_EQ(T(-124.0), func(T(-123.75)));70 EXPECT_FP_EQ(T(124.0), func(T(124.50)));71 EXPECT_FP_EQ(T(-124.0), func(T(-124.50)));72 }73 74 void testRange(RoundEvenFunc func) {75 constexpr int COUNT = 100'000;76 constexpr StorageType STEP = LIBC_NAMESPACE::cpp::max(77 static_cast<StorageType>(STORAGE_MAX / COUNT), StorageType(1));78 StorageType v = 0;79 for (int i = 0; i <= COUNT; ++i, v += STEP) {80 FPBits xbits(v);81 T x = xbits.get_val();82 if (xbits.is_inf_or_nan())83 continue;84 85 ASSERT_MPFR_MATCH(mpfr::Operation::RoundEven, x, func(x), 0.0);86 }87 }88};89 90#define LIST_ROUNDEVEN_TESTS(T, func) \91 using LlvmLibcRoundEvenTest = RoundEvenTest<T>; \92 TEST_F(LlvmLibcRoundEvenTest, SpecialNumbers) { testSpecialNumbers(&func); } \93 TEST_F(LlvmLibcRoundEvenTest, RoundedNubmers) { testRoundedNumbers(&func); } \94 TEST_F(LlvmLibcRoundEvenTest, Fractions) { testFractions(&func); } \95 TEST_F(LlvmLibcRoundEvenTest, Range) { testRange(&func); }96 97#endif // LLVM_LIBC_TEST_SRC_MATH_ROUNDEVENTEST_H98