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//===-- Utility class to test sqrt[f|l] -------------------------*- C++ -*-===//
//
// 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/__support/CPP/bit.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
#include "utils/MPFRWrapper/MPFRUtils.h"
#include "hdr/math_macros.h"
namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
template <typename T> class SqrtTest : public LIBC_NAMESPACE::testing::Test {
DECLARE_SPECIAL_CONSTANTS(T)
static constexpr StorageType HIDDEN_BIT =
StorageType(1) << LIBC_NAMESPACE::fputil::FPBits<T>::FRACTION_LEN;
public:
typedef T (*SqrtFunc)(T);
void test_special_numbers(SqrtFunc func) {
ASSERT_FP_EQ(aNaN, func(aNaN));
ASSERT_FP_EQ(inf, func(inf));
ASSERT_FP_EQ(aNaN, func(neg_inf));
ASSERT_FP_EQ(0.0, func(0.0));
ASSERT_FP_EQ(-0.0, func(-0.0));
ASSERT_FP_EQ(aNaN, func(T(-1.0)));
ASSERT_FP_EQ(T(1.0), func(T(1.0)));
ASSERT_FP_EQ(T(2.0), func(T(4.0)));
ASSERT_FP_EQ(T(3.0), func(T(9.0)));
}
void test_denormal_values(SqrtFunc func) {
for (StorageType mant = 1; mant < HIDDEN_BIT; mant <<= 1) {
FPBits denormal(T(0.0));
denormal.set_mantissa(mant);
T x = denormal.get_val();
EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sqrt, x, func(x), 0.5);
}
constexpr StorageType COUNT = 200'001;
constexpr StorageType STEP = HIDDEN_BIT / COUNT;
for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
T x = LIBC_NAMESPACE::cpp::bit_cast<T>(v);
EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sqrt, x, func(x), 0.5);
}
}
void test_normal_range(SqrtFunc func) {
constexpr StorageType COUNT = 200'001;
constexpr StorageType STEP = STORAGE_MAX / COUNT;
for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
T x = LIBC_NAMESPACE::cpp::bit_cast<T>(v);
if (isnan(x) || (x < 0)) {
continue;
}
EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sqrt, x, func(x), 0.5);
}
}
};
#define LIST_SQRT_TESTS(T, func) \
using LlvmLibcSqrtTest = SqrtTest<T>; \
TEST_F(LlvmLibcSqrtTest, SpecialNumbers) { test_special_numbers(&func); } \
TEST_F(LlvmLibcSqrtTest, DenormalValues) { test_denormal_values(&func); } \
TEST_F(LlvmLibcSqrtTest, NormalRange) { test_normal_range(&func); }
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