//===-- Unittests for sqrtf -----------------------------------------------===// // // 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 "src/math/sqrtf.h" #include "utils/FPUtil/FPBits.h" #include "utils/FPUtil/TestHelpers.h" #include "utils/MPFRWrapper/MPFRUtils.h" #include using FPBits = __llvm_libc::fputil::FPBits; using UIntType = typename FPBits::UIntType; namespace mpfr = __llvm_libc::testing::mpfr; constexpr UIntType HiddenBit = UIntType(1) << __llvm_libc::fputil::MantissaWidth::value; DECLARE_SPECIAL_CONSTANTS(float) TEST(SqrtfTest, SpecialValues) { ASSERT_FP_EQ(nan, __llvm_libc::sqrtf(nan)); ASSERT_FP_EQ(inf, __llvm_libc::sqrtf(inf)); ASSERT_FP_EQ(nan, __llvm_libc::sqrtf(negInf)); ASSERT_FP_EQ(0.0f, __llvm_libc::sqrtf(0.0f)); ASSERT_FP_EQ(-0.0f, __llvm_libc::sqrtf(-0.0f)); ASSERT_FP_EQ(nan, __llvm_libc::sqrtf(-1.0f)); ASSERT_FP_EQ(1.0f, __llvm_libc::sqrtf(1.0f)); ASSERT_FP_EQ(2.0f, __llvm_libc::sqrtf(4.0f)); ASSERT_FP_EQ(3.0f, __llvm_libc::sqrtf(9.0f)); } TEST(SqrtfTest, DenormalValues) { for (UIntType mant = 1; mant < HiddenBit; mant <<= 1) { FPBits denormal(0.0f); denormal.mantissa = mant; ASSERT_MPFR_MATCH(mpfr::Operation::Sqrt, float(denormal), __llvm_libc::sqrtf(denormal), 0.5); } constexpr UIntType count = 1'000'001; constexpr UIntType step = HiddenBit / count; for (UIntType i = 0, v = 0; i <= count; ++i, v += step) { float x = *reinterpret_cast(&v); ASSERT_MPFR_MATCH(mpfr::Operation::Sqrt, x, __llvm_libc::sqrtf(x), 0.5); } } TEST(SqrtfTest, InFloatRange) { constexpr UIntType count = 10'000'001; constexpr UIntType step = UIntType(-1) / count; for (UIntType i = 0, v = 0; i <= count; ++i, v += step) { float x = *reinterpret_cast(&v); if (isnan(x) || (x < 0)) { continue; } ASSERT_MPFR_MATCH(mpfr::Operation::Sqrt, x, __llvm_libc::sqrtf(x), 0.5); } }