| //===-- Unittests for logbl -----------------------------------------------===// |
| // |
| // 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/logbl.h" |
| #include "utils/FPUtil/FPBits.h" |
| #include "utils/FPUtil/ManipulationFunctions.h" |
| #include "utils/UnitTest/Test.h" |
| #include <math.h> |
| |
| using FPBits = __llvm_libc::fputil::FPBits<long double>; |
| |
| TEST(LlvmLibclogblTest, SpecialNumbers) { |
| EXPECT_TRUE(FPBits::inf() == __llvm_libc::logbl(FPBits::inf())); |
| EXPECT_TRUE(FPBits::inf() == __llvm_libc::logbl(FPBits::negInf())); |
| |
| EXPECT_TRUE(FPBits::negInf() == __llvm_libc::logbl(FPBits::zero())); |
| EXPECT_TRUE(FPBits::negInf() == __llvm_libc::logbl(FPBits::negZero())); |
| |
| EXPECT_TRUE(FPBits(__llvm_libc::logbl(FPBits::buildNaN(1))).isNaN()); |
| } |
| |
| TEST(LlvmLibclogblTest, PowersOfTwo) { |
| EXPECT_TRUE(0.0l == __llvm_libc::logbl(1.0l)); |
| EXPECT_TRUE(0.0l == __llvm_libc::logbl(-1.0l)); |
| |
| EXPECT_TRUE(1.0l == __llvm_libc::logbl(2.0l)); |
| EXPECT_TRUE(1.0l == __llvm_libc::logbl(-2.0l)); |
| |
| EXPECT_TRUE(2.0l == __llvm_libc::logbl(4.0l)); |
| EXPECT_TRUE(2.0l == __llvm_libc::logbl(-4.0l)); |
| |
| EXPECT_TRUE(3.0l == __llvm_libc::logbl(8.0l)); |
| EXPECT_TRUE(3.0l == __llvm_libc::logbl(-8.0l)); |
| |
| EXPECT_TRUE(4.0l == __llvm_libc::logbl(16.0l)); |
| EXPECT_TRUE(4.0l == __llvm_libc::logbl(-16.0l)); |
| |
| EXPECT_TRUE(5.0l == __llvm_libc::logbl(32.0l)); |
| EXPECT_TRUE(5.0l == __llvm_libc::logbl(-32.0l)); |
| } |
| |
| TEST(LlvmLibcLogbTest, SomeIntegers) { |
| EXPECT_TRUE(1.0l == __llvm_libc::logbl(3.0l)); |
| EXPECT_TRUE(1.0l == __llvm_libc::logbl(-3.0l)); |
| |
| EXPECT_TRUE(2.0l == __llvm_libc::logbl(7.0l)); |
| EXPECT_TRUE(2.0l == __llvm_libc::logbl(-7.0l)); |
| |
| EXPECT_TRUE(3.0l == __llvm_libc::logbl(10.0l)); |
| EXPECT_TRUE(3.0l == __llvm_libc::logbl(-10.0l)); |
| |
| EXPECT_TRUE(4.0l == __llvm_libc::logbl(31.0l)); |
| EXPECT_TRUE(4.0l == __llvm_libc::logbl(-31.0l)); |
| |
| EXPECT_TRUE(5.0l == __llvm_libc::logbl(55.0l)); |
| EXPECT_TRUE(5.0l == __llvm_libc::logbl(-55.0l)); |
| } |
| |
| TEST(LlvmLibcLogblTest, LongDoubleRange) { |
| using UIntType = FPBits::UIntType; |
| constexpr UIntType count = 10000000; |
| constexpr UIntType step = UIntType(-1) / count; |
| for (UIntType i = 0, v = 0; i <= count; ++i, v += step) { |
| long double x = FPBits(v); |
| if (isnan(x) || isinf(x) || x == 0.0l) |
| continue; |
| |
| int exponent; |
| __llvm_libc::fputil::frexp(x, exponent); |
| ASSERT_TRUE((long double)(exponent) == __llvm_libc::logbl(x) + 1.0l); |
| } |
| } |