25226f3e4a
Apply the formatting rules that were applied to the libc/src directory to the libc/test directory, as well as the files in libc/utils that are included by the tests. This does not include automated enforcement. Reviewed By: sivachandra, lntue Differential Revision: https://reviews.llvm.org/D116127
112 lines
3.3 KiB
C++
112 lines
3.3 KiB
C++
//===-- Utility class to test different flavors of ilogb --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIBC_TEST_SRC_MATH_ILOGBTEST_H
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#define LLVM_LIBC_TEST_SRC_MATH_ILOGBTEST_H
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#include "src/__support/FPUtil/FPBits.h"
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#include "src/__support/FPUtil/ManipulationFunctions.h"
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#include "utils/UnitTest/Test.h"
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#include <math.h>
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#include <limits.h>
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class LlvmLibcILogbTest : public __llvm_libc::testing::Test {
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public:
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template <typename T> struct ILogbFunc { typedef int (*Func)(T); };
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template <typename T>
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void test_special_numbers(typename ILogbFunc<T>::Func func) {
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EXPECT_EQ(FP_ILOGB0, func(T(__llvm_libc::fputil::FPBits<T>::zero())));
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EXPECT_EQ(FP_ILOGB0, func(T(__llvm_libc::fputil::FPBits<T>::neg_zero())));
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EXPECT_EQ(FP_ILOGBNAN,
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func(T(__llvm_libc::fputil::FPBits<T>::build_nan(1))));
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EXPECT_EQ(INT_MAX, func(T(__llvm_libc::fputil::FPBits<T>::inf())));
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EXPECT_EQ(INT_MAX, func(T(__llvm_libc::fputil::FPBits<T>::neg_inf())));
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}
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template <typename T>
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void test_powers_of_two(typename ILogbFunc<T>::Func func) {
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EXPECT_EQ(0, func(T(1.0)));
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EXPECT_EQ(0, func(T(-1.0)));
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EXPECT_EQ(1, func(T(2.0)));
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EXPECT_EQ(1, func(T(-2.0)));
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EXPECT_EQ(2, func(T(4.0)));
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EXPECT_EQ(2, func(T(-4.0)));
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EXPECT_EQ(3, func(T(8.0)));
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EXPECT_EQ(3, func(-8.0));
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EXPECT_EQ(4, func(16.0));
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EXPECT_EQ(4, func(-16.0));
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EXPECT_EQ(5, func(32.0));
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EXPECT_EQ(5, func(-32.0));
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}
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template <typename T>
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void test_some_integers(typename ILogbFunc<T>::Func func) {
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EXPECT_EQ(1, func(T(3.0)));
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EXPECT_EQ(1, func(T(-3.0)));
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EXPECT_EQ(2, func(T(7.0)));
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EXPECT_EQ(2, func(T(-7.0)));
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EXPECT_EQ(3, func(T(10.0)));
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EXPECT_EQ(3, func(T(-10.0)));
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EXPECT_EQ(4, func(T(31.0)));
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EXPECT_EQ(4, func(-31.0));
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EXPECT_EQ(5, func(55.0));
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EXPECT_EQ(5, func(-55.0));
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}
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template <typename T>
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void test_subnormal_range(typename ILogbFunc<T>::Func func) {
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using FPBits = __llvm_libc::fputil::FPBits<T>;
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using UIntType = typename FPBits::UIntType;
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constexpr UIntType COUNT = 1000001;
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constexpr UIntType STEP =
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(FPBits::MAX_SUBNORMAL - FPBits::MIN_SUBNORMAL) / COUNT;
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for (UIntType v = FPBits::MIN_SUBNORMAL; v <= FPBits::MAX_SUBNORMAL;
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v += STEP) {
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T x = T(FPBits(v));
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if (isnan(x) || isinf(x) || x == 0.0)
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continue;
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int exponent;
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__llvm_libc::fputil::frexp(x, exponent);
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ASSERT_EQ(exponent, func(x) + 1);
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}
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}
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template <typename T>
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void test_normal_range(typename ILogbFunc<T>::Func func) {
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using FPBits = __llvm_libc::fputil::FPBits<T>;
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using UIntType = typename FPBits::UIntType;
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constexpr UIntType COUNT = 1000001;
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constexpr UIntType STEP = (FPBits::MAX_NORMAL - FPBits::MIN_NORMAL) / COUNT;
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for (UIntType v = FPBits::MIN_NORMAL; v <= FPBits::MAX_NORMAL; v += STEP) {
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T x = T(FPBits(v));
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if (isnan(x) || isinf(x) || x == 0.0)
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continue;
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int exponent;
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__llvm_libc::fputil::frexp(x, exponent);
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ASSERT_EQ(exponent, func(x) + 1);
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}
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}
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};
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#endif // LLVM_LIBC_TEST_SRC_MATH_ILOGBTEST_H
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