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1//===-- Utility class to test different flavors of nearbyint ----*- 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_NEARBYINTTEST_H10#define LLVM_LIBC_TEST_SRC_MATH_NEARBYINTTEST_H11 12#include "hdr/fenv_macros.h"13#include "src/__support/FPUtil/FEnvImpl.h"14#include "src/__support/FPUtil/FPBits.h"15#include "test/UnitTest/FPMatcher.h"16#include "test/UnitTest/Test.h"17 18using LIBC_NAMESPACE::Sign;19 20static constexpr int ROUNDING_MODES[4] = {FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO,21 FE_TONEAREST};22 23template <typename T>24class NearbyIntTestTemplate : public LIBC_NAMESPACE::testing::Test {25 26 DECLARE_SPECIAL_CONSTANTS(T)27 28public:29 typedef T (*NearbyIntFunc)(T);30 31 void testNaN(NearbyIntFunc func) {32 EXPECT_FP_EQ_ALL_ROUNDING(func(aNaN), aNaN);33 }34 35 void testInfinities(NearbyIntFunc func) {36 EXPECT_FP_EQ_ALL_ROUNDING(func(inf), inf);37 EXPECT_FP_EQ_ALL_ROUNDING(func(neg_inf), neg_inf);38 }39 40 void testZeroes(NearbyIntFunc func) {41 EXPECT_FP_EQ_ALL_ROUNDING(func(zero), zero);42 EXPECT_FP_EQ_ALL_ROUNDING(func(neg_zero), neg_zero);43 }44 45 void testIntegers(NearbyIntFunc func) {46 EXPECT_FP_EQ_ALL_ROUNDING(func(T(1.0)), T(1.0));47 EXPECT_FP_EQ_ALL_ROUNDING(func(T(-1.0)), T(-1.0));48 49 EXPECT_FP_EQ_ALL_ROUNDING(func(T(1234.0)), T(1234.0));50 EXPECT_FP_EQ_ALL_ROUNDING(func(T(-1234.0)), T(-1234.0));51 52 EXPECT_FP_EQ_ALL_ROUNDING(func(T(10.0)), T(10.0));53 EXPECT_FP_EQ_ALL_ROUNDING(func(T(-10.0)), T(-10.0));54 55 FPBits ints_start(T(0));56 ints_start.set_biased_exponent(FPBits::SIG_LEN + FPBits::EXP_BIAS);57 T expected = ints_start.get_val();58 EXPECT_FP_EQ_ALL_ROUNDING(func(expected), expected);59 }60 61 void testSubnormalToNearest(NearbyIntFunc func) {62 ASSERT_FP_EQ(func(min_denormal), zero);63 ASSERT_FP_EQ(func(-min_denormal), neg_zero);64 }65 66 void testSubnormalTowardZero(NearbyIntFunc func) {67 EXPECT_FP_EQ_ROUNDING_TOWARD_ZERO(func(min_denormal), zero);68 EXPECT_FP_EQ_ROUNDING_TOWARD_ZERO(func(-min_denormal), neg_zero);69 }70 71 void testSubnormalToPosInf(NearbyIntFunc func) {72 EXPECT_FP_EQ_ROUNDING_UPWARD(func(min_denormal), FPBits::one().get_val());73 EXPECT_FP_EQ_ROUNDING_UPWARD(func(-min_denormal), neg_zero);74 }75 76 void testSubnormalToNegInf(NearbyIntFunc func) {77 T negative_one = FPBits::one(Sign::NEG).get_val();78 EXPECT_FP_EQ_ROUNDING_DOWNWARD(func(min_denormal), zero);79 EXPECT_FP_EQ_ROUNDING_DOWNWARD(func(-min_denormal), negative_one);80 }81};82 83#define LIST_NEARBYINT_TESTS(T, func) \84 using LlvmLibcNearbyIntTest = NearbyIntTestTemplate<T>; \85 TEST_F(LlvmLibcNearbyIntTest, TestNaN) { testNaN(&func); } \86 TEST_F(LlvmLibcNearbyIntTest, TestInfinities) { testInfinities(&func); } \87 TEST_F(LlvmLibcNearbyIntTest, TestZeroes) { testZeroes(&func); } \88 TEST_F(LlvmLibcNearbyIntTest, TestIntegers) { testIntegers(&func); } \89 TEST_F(LlvmLibcNearbyIntTest, TestSubnormalToNearest) { \90 testSubnormalToNearest(&func); \91 } \92 TEST_F(LlvmLibcNearbyIntTest, TestSubnormalTowardZero) { \93 testSubnormalTowardZero(&func); \94 } \95 TEST_F(LlvmLibcNearbyIntTest, TestSubnormalToPosInf) { \96 testSubnormalToPosInf(&func); \97 } \98 TEST_F(LlvmLibcNearbyIntTest, TestSubnormalToNegInf) { \99 testSubnormalToNegInf(&func); \100 }101 102#endif // LLVM_LIBC_TEST_SRC_MATH_NEARBYINTTEST_H103