| //===-- Utility class to test fabs[f|l] -------------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "utils/FPUtil/TestHelpers.h" |
| #include "utils/MPFRWrapper/MPFRUtils.h" |
| #include "utils/UnitTest/Test.h" |
| |
| #include <math.h> |
| |
| namespace mpfr = __llvm_libc::testing::mpfr; |
| |
| template <typename T> class SqrtTest : public __llvm_libc::testing::Test { |
| |
| DECLARE_SPECIAL_CONSTANTS(T) |
| |
| static constexpr UIntType HiddenBit = |
| UIntType(1) << __llvm_libc::fputil::MantissaWidth<T>::value; |
| |
| public: |
| typedef T (*SqrtFunc)(T); |
| |
| void testSpecialNumbers(SqrtFunc func) { |
| ASSERT_FP_EQ(aNaN, func(aNaN)); |
| ASSERT_FP_EQ(inf, func(inf)); |
| ASSERT_FP_EQ(aNaN, func(negInf)); |
| ASSERT_FP_EQ(0.0, func(0.0)); |
| ASSERT_FP_EQ(-0.0, func(-0.0)); |
| ASSERT_FP_EQ(aNaN, func(T(-1.0))); |
| ASSERT_FP_EQ(T(1.0), func(T(1.0))); |
| ASSERT_FP_EQ(T(2.0), func(T(4.0))); |
| ASSERT_FP_EQ(T(3.0), func(T(9.0))); |
| } |
| |
| void testDenormalValues(SqrtFunc func) { |
| for (UIntType mant = 1; mant < HiddenBit; mant <<= 1) { |
| FPBits denormal(T(0.0)); |
| denormal.encoding.mantissa = mant; |
| |
| ASSERT_MPFR_MATCH(mpfr::Operation::Sqrt, T(denormal), func(T(denormal)), |
| T(0.5)); |
| } |
| |
| constexpr UIntType count = 1'000'001; |
| constexpr UIntType step = HiddenBit / count; |
| for (UIntType i = 0, v = 0; i <= count; ++i, v += step) { |
| T x = *reinterpret_cast<T *>(&v); |
| ASSERT_MPFR_MATCH(mpfr::Operation::Sqrt, x, func(x), 0.5); |
| } |
| } |
| |
| void testNormalRange(SqrtFunc func) { |
| constexpr UIntType count = 10'000'001; |
| constexpr UIntType step = UIntType(-1) / count; |
| for (UIntType i = 0, v = 0; i <= count; ++i, v += step) { |
| T x = *reinterpret_cast<T *>(&v); |
| if (isnan(x) || (x < 0)) { |
| continue; |
| } |
| ASSERT_MPFR_MATCH(mpfr::Operation::Sqrt, x, func(x), 0.5); |
| } |
| } |
| }; |
| |
| #define LIST_SQRT_TESTS(T, func) \ |
| using LlvmLibcSqrtTest = SqrtTest<T>; \ |
| TEST_F(LlvmLibcSqrtTest, SpecialNumbers) { testSpecialNumbers(&func); } \ |
| TEST_F(LlvmLibcSqrtTest, DenormalValues) { testDenormalValues(&func); } \ |
| TEST_F(LlvmLibcSqrtTest, NormalRange) { testNormalRange(&func); } |