| //===-- Unittests for logbf -----------------------------------------------===// |
| // |
| // 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/logbf.h" |
| #include "utils/FPUtil/BitPatterns.h" |
| #include "utils/FPUtil/FloatOperations.h" |
| #include "utils/FPUtil/FloatProperties.h" |
| #include "utils/FPUtil/ManipulationFunctions.h" |
| #include "utils/UnitTest/Test.h" |
| #include <math.h> |
| |
| using __llvm_libc::fputil::valueAsBits; |
| using __llvm_libc::fputil::valueFromBits; |
| |
| using BitPatterns = __llvm_libc::fputil::BitPatterns<float>; |
| using Properties = __llvm_libc::fputil::FloatProperties<float>; |
| |
| TEST(LlvmLibcLogbfTest, SpecialNumbers) { |
| EXPECT_EQ( |
| BitPatterns::aQuietNaN, |
| valueAsBits(__llvm_libc::logbf(valueFromBits(BitPatterns::aQuietNaN)))); |
| EXPECT_EQ(BitPatterns::aNegativeQuietNaN, |
| valueAsBits(__llvm_libc::logbf( |
| valueFromBits(BitPatterns::aNegativeQuietNaN)))); |
| |
| EXPECT_EQ(BitPatterns::aSignallingNaN, |
| valueAsBits(__llvm_libc::logbf( |
| valueFromBits(BitPatterns::aSignallingNaN)))); |
| EXPECT_EQ(BitPatterns::aNegativeSignallingNaN, |
| valueAsBits(__llvm_libc::logbf( |
| valueFromBits(BitPatterns::aNegativeSignallingNaN)))); |
| |
| EXPECT_EQ(BitPatterns::inf, |
| valueAsBits(__llvm_libc::logbf(valueFromBits(BitPatterns::inf)))); |
| EXPECT_EQ(BitPatterns::inf, valueAsBits(__llvm_libc::logbf( |
| valueFromBits(BitPatterns::negInf)))); |
| |
| EXPECT_EQ(BitPatterns::negInf, |
| valueAsBits(__llvm_libc::logbf(valueFromBits(BitPatterns::zero)))); |
| EXPECT_EQ(BitPatterns::negInf, valueAsBits(__llvm_libc::logbf( |
| valueFromBits(BitPatterns::negZero)))); |
| } |
| |
| TEST(LlvmLibcLogbfTest, PowersOfTwo) { |
| EXPECT_EQ(valueAsBits(0.0f), valueAsBits(__llvm_libc::logbf(1.0f))); |
| EXPECT_EQ(valueAsBits(0.0f), valueAsBits(__llvm_libc::logbf(-1.0f))); |
| |
| EXPECT_EQ(valueAsBits(1.0f), valueAsBits(__llvm_libc::logbf(2.0f))); |
| EXPECT_EQ(valueAsBits(1.0f), valueAsBits(__llvm_libc::logbf(-2.0f))); |
| |
| EXPECT_EQ(valueAsBits(2.0f), valueAsBits(__llvm_libc::logbf(4.0f))); |
| EXPECT_EQ(valueAsBits(2.0f), valueAsBits(__llvm_libc::logbf(-4.0f))); |
| |
| EXPECT_EQ(valueAsBits(3.0f), valueAsBits(__llvm_libc::logbf(8.0f))); |
| EXPECT_EQ(valueAsBits(3.0f), valueAsBits(__llvm_libc::logbf(-8.0f))); |
| |
| EXPECT_EQ(valueAsBits(4.0f), valueAsBits(__llvm_libc::logbf(16.0f))); |
| EXPECT_EQ(valueAsBits(4.0f), valueAsBits(__llvm_libc::logbf(-16.0f))); |
| |
| EXPECT_EQ(valueAsBits(5.0f), valueAsBits(__llvm_libc::logbf(32.0f))); |
| EXPECT_EQ(valueAsBits(5.0f), valueAsBits(__llvm_libc::logbf(-32.0f))); |
| } |
| |
| TEST(LlvmLibcLogbTest, SomeIntegers) { |
| EXPECT_EQ(valueAsBits(1.0f), valueAsBits(__llvm_libc::logbf(3.0f))); |
| EXPECT_EQ(valueAsBits(1.0f), valueAsBits(__llvm_libc::logbf(-3.0f))); |
| |
| EXPECT_EQ(valueAsBits(2.0f), valueAsBits(__llvm_libc::logbf(7.0f))); |
| EXPECT_EQ(valueAsBits(2.0f), valueAsBits(__llvm_libc::logbf(-7.0f))); |
| |
| EXPECT_EQ(valueAsBits(3.0f), valueAsBits(__llvm_libc::logbf(10.0f))); |
| EXPECT_EQ(valueAsBits(3.0f), valueAsBits(__llvm_libc::logbf(-10.0f))); |
| |
| EXPECT_EQ(valueAsBits(4.0f), valueAsBits(__llvm_libc::logbf(31.0f))); |
| EXPECT_EQ(valueAsBits(4.0f), valueAsBits(__llvm_libc::logbf(-31.0f))); |
| |
| EXPECT_EQ(valueAsBits(5.0f), valueAsBits(__llvm_libc::logbf(55.0f))); |
| EXPECT_EQ(valueAsBits(5.0f), valueAsBits(__llvm_libc::logbf(-55.0f))); |
| } |
| |
| TEST(LlvmLibcLogbfTest, InDoubleRange) { |
| using BitsType = Properties::BitsType; |
| constexpr BitsType count = 10000000; |
| constexpr BitsType step = UINT32_MAX / count; |
| for (BitsType i = 0, v = 0; i <= count; ++i, v += step) { |
| float x = valueFromBits(v); |
| if (isnan(x) || isinf(x) || x == 0.0) |
| continue; |
| |
| int exponent; |
| __llvm_libc::fputil::frexp(x, exponent); |
| ASSERT_TRUE(float(exponent) == __llvm_libc::logbf(x) + 1.0); |
| } |
| } |