| //===-- Unittests for fabs ------------------------------------------------===// |
| // |
| // 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 "include/math.h" |
| #include "src/math/fabs.h" |
| #include "utils/FPUtil/BitPatterns.h" |
| #include "utils/FPUtil/FloatOperations.h" |
| #include "utils/FPUtil/FloatProperties.h" |
| #include "utils/MPFRWrapper/MPFRUtils.h" |
| #include "utils/UnitTest/Test.h" |
| |
| using __llvm_libc::fputil::valueAsBits; |
| using __llvm_libc::fputil::valueFromBits; |
| |
| using BitPatterns = __llvm_libc::fputil::BitPatterns<double>; |
| using Properties = __llvm_libc::fputil::FloatProperties<double>; |
| |
| namespace mpfr = __llvm_libc::testing::mpfr; |
| |
| // Zero tolerance; As in, exact match with MPFR result. |
| static constexpr mpfr::Tolerance tolerance{mpfr::Tolerance::doublePrecision, 0, |
| 0}; |
| |
| TEST(FabsTest, SpecialNumbers) { |
| EXPECT_EQ( |
| BitPatterns::aQuietNaN, |
| valueAsBits(__llvm_libc::fabs(valueFromBits(BitPatterns::aQuietNaN)))); |
| EXPECT_EQ(BitPatterns::aQuietNaN, valueAsBits(__llvm_libc::fabs(valueFromBits( |
| BitPatterns::aNegativeQuietNaN)))); |
| |
| EXPECT_EQ(BitPatterns::aSignallingNaN, |
| valueAsBits( |
| __llvm_libc::fabs(valueFromBits(BitPatterns::aSignallingNaN)))); |
| EXPECT_EQ(BitPatterns::aSignallingNaN, |
| valueAsBits(__llvm_libc::fabs( |
| valueFromBits(BitPatterns::aNegativeSignallingNaN)))); |
| |
| EXPECT_EQ(BitPatterns::inf, |
| valueAsBits(__llvm_libc::fabs(valueFromBits(BitPatterns::inf)))); |
| EXPECT_EQ(BitPatterns::inf, |
| valueAsBits(__llvm_libc::fabs(valueFromBits(BitPatterns::negInf)))); |
| |
| EXPECT_EQ(BitPatterns::zero, |
| valueAsBits(__llvm_libc::fabs(valueFromBits(BitPatterns::zero)))); |
| EXPECT_EQ(BitPatterns::zero, valueAsBits(__llvm_libc::fabs( |
| valueFromBits(BitPatterns::negZero)))); |
| } |
| |
| TEST(FabsTest, InDoubleRange) { |
| using BitsType = Properties::BitsType; |
| constexpr BitsType count = 1000000; |
| constexpr BitsType step = UINT64_MAX / count; |
| for (BitsType i = 0, v = 0; i <= count; ++i, v += step) { |
| double x = valueFromBits(v); |
| if (isnan(x) || isinf(x)) |
| continue; |
| ASSERT_MPFR_MATCH(mpfr::Operation::Abs, x, __llvm_libc::fabs(x), tolerance); |
| } |
| } |