| //===-- Utility class to test different flavors of nearbyint ----*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIBC_TEST_SRC_MATH_NEARBYINTTEST_H |
| #define LLVM_LIBC_TEST_SRC_MATH_NEARBYINTTEST_H |
| |
| #include "hdr/fenv_macros.h" |
| #include "src/__support/FPUtil/FEnvImpl.h" |
| #include "src/__support/FPUtil/FPBits.h" |
| #include "test/UnitTest/FPMatcher.h" |
| #include "test/UnitTest/Test.h" |
| |
| static constexpr int ROUNDING_MODES[4] = {FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO, |
| FE_TONEAREST}; |
| |
| template <typename T> |
| class NearbyIntTestTemplate : public LIBC_NAMESPACE::testing::Test { |
| |
| DECLARE_SPECIAL_CONSTANTS(T) |
| |
| public: |
| typedef T (*NearbyIntFunc)(T); |
| |
| void testNaN(NearbyIntFunc func) { |
| EXPECT_FP_EQ_ALL_ROUNDING(func(aNaN), aNaN); |
| } |
| |
| void testInfinities(NearbyIntFunc func) { |
| EXPECT_FP_EQ_ALL_ROUNDING(func(inf), inf); |
| EXPECT_FP_EQ_ALL_ROUNDING(func(neg_inf), neg_inf); |
| } |
| |
| void testZeroes(NearbyIntFunc func) { |
| EXPECT_FP_EQ_ALL_ROUNDING(func(zero), zero); |
| EXPECT_FP_EQ_ALL_ROUNDING(func(neg_zero), neg_zero); |
| } |
| |
| void testIntegers(NearbyIntFunc func) { |
| EXPECT_FP_EQ_ALL_ROUNDING(func(T(1.0)), T(1.0)); |
| EXPECT_FP_EQ_ALL_ROUNDING(func(T(-1.0)), T(-1.0)); |
| |
| EXPECT_FP_EQ_ALL_ROUNDING(func(T(1234.0)), T(1234.0)); |
| EXPECT_FP_EQ_ALL_ROUNDING(func(T(-1234.0)), T(-1234.0)); |
| |
| EXPECT_FP_EQ_ALL_ROUNDING(func(T(10.0)), T(10.0)); |
| EXPECT_FP_EQ_ALL_ROUNDING(func(T(-10.0)), T(-10.0)); |
| |
| FPBits ints_start(T(0)); |
| ints_start.set_biased_exponent(FPBits::SIG_LEN + FPBits::EXP_BIAS); |
| T expected = ints_start.get_val(); |
| EXPECT_FP_EQ_ALL_ROUNDING(func(expected), expected); |
| } |
| |
| void testSubnormalToNearest(NearbyIntFunc func) { |
| ASSERT_FP_EQ(func(min_denormal), zero); |
| ASSERT_FP_EQ(func(-min_denormal), neg_zero); |
| } |
| |
| void testSubnormalTowardZero(NearbyIntFunc func) { |
| EXPECT_FP_EQ_ROUNDING_TOWARD_ZERO(func(min_denormal), zero); |
| EXPECT_FP_EQ_ROUNDING_TOWARD_ZERO(func(-min_denormal), neg_zero); |
| } |
| |
| void testSubnormalToPosInf(NearbyIntFunc func) { |
| EXPECT_FP_EQ_ROUNDING_UPWARD(func(min_denormal), FPBits::one().get_val()); |
| EXPECT_FP_EQ_ROUNDING_UPWARD(func(-min_denormal), neg_zero); |
| } |
| |
| void testSubnormalToNegInf(NearbyIntFunc func) { |
| T negative_one = FPBits::one(Sign::NEG).get_val(); |
| EXPECT_FP_EQ_ROUNDING_DOWNWARD(func(min_denormal), zero); |
| EXPECT_FP_EQ_ROUNDING_DOWNWARD(func(-min_denormal), negative_one); |
| } |
| }; |
| |
| #define LIST_NEARBYINT_TESTS(T, func) \ |
| using LlvmLibcNearbyIntTest = NearbyIntTestTemplate<T>; \ |
| TEST_F(LlvmLibcNearbyIntTest, TestNaN) { testNaN(&func); } \ |
| TEST_F(LlvmLibcNearbyIntTest, TestInfinities) { testInfinities(&func); } \ |
| TEST_F(LlvmLibcNearbyIntTest, TestZeroes) { testZeroes(&func); } \ |
| TEST_F(LlvmLibcNearbyIntTest, TestIntegers) { testIntegers(&func); } \ |
| TEST_F(LlvmLibcNearbyIntTest, TestSubnormalToNearest) { \ |
| testSubnormalToNearest(&func); \ |
| } \ |
| TEST_F(LlvmLibcNearbyIntTest, TestSubnormalTowardZero) { \ |
| testSubnormalTowardZero(&func); \ |
| } \ |
| TEST_F(LlvmLibcNearbyIntTest, TestSubnormalToPosInf) { \ |
| testSubnormalToPosInf(&func); \ |
| } \ |
| TEST_F(LlvmLibcNearbyIntTest, TestSubnormalToNegInf) { \ |
| testSubnormalToNegInf(&func); \ |
| } |
| |
| #endif // LLVM_LIBC_TEST_SRC_MATH_NEARBYINTTEST_H |