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//===-- FPMatchers.h --------------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIBC_TEST_UNITTEST_FPMATCHER_H
#define LLVM_LIBC_TEST_UNITTEST_FPMATCHER_H
#include "src/__support/CPP/array.h"
#include "src/__support/CPP/type_traits.h"
#include "src/__support/FPUtil/FEnvImpl.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/__support/FPUtil/fpbits_str.h"
#include "test/UnitTest/RoundingModeUtils.h"
#include "test/UnitTest/StringUtils.h"
#include "test/UnitTest/Test.h"
#include "hdr/math_macros.h"
namespace LIBC_NAMESPACE {
namespace testing {
template <typename T, TestCond Condition> class FPMatcher : public Matcher<T> {
static_assert(cpp::is_floating_point_v<T>,
"FPMatcher can only be used with floating point values.");
static_assert(Condition == TestCond::EQ || Condition == TestCond::NE,
"Unsupported FPMatcher test condition.");
T expected;
T actual;
public:
FPMatcher(T expectedValue) : expected(expectedValue) {}
bool match(T actualValue) {
actual = actualValue;
fputil::FPBits<T> actualBits(actual), expectedBits(expected);
if (Condition == TestCond::EQ)
return (actualBits.is_nan() && expectedBits.is_nan()) ||
(actualBits.uintval() == expectedBits.uintval());
// If condition == TestCond::NE.
if (actualBits.is_nan())
return !expectedBits.is_nan();
return expectedBits.is_nan() ||
(actualBits.uintval() != expectedBits.uintval());
}
void explainError() override {
tlog << "Expected floating point value: "
<< str(fputil::FPBits<T>(expected)) << '\n';
tlog << "Actual floating point value: " << str(fputil::FPBits<T>(actual))
<< '\n';
}
};
template <TestCond C, typename T> FPMatcher<T, C> getMatcher(T expectedValue) {
return FPMatcher<T, C>(expectedValue);
}
template <typename T> struct FPTest : public Test {
using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>;
using StorageType = typename FPBits::StorageType;
static constexpr StorageType STORAGE_MAX =
LIBC_NAMESPACE::cpp::numeric_limits<StorageType>::max();
static constexpr T zero = FPBits::zero(Sign::POS).get_val();
static constexpr T neg_zero = FPBits::zero(Sign::NEG).get_val();
static constexpr T aNaN = FPBits::quiet_nan().get_val();
static constexpr T sNaN = FPBits::signaling_nan().get_val();
static constexpr T inf = FPBits::inf(Sign::POS).get_val();
static constexpr T neg_inf = FPBits::inf(Sign::NEG).get_val();
static constexpr T min_normal = FPBits::min_normal().get_val();
static constexpr T max_normal = FPBits::max_normal().get_val();
static constexpr T min_denormal = FPBits::min_subnormal().get_val();
static constexpr T max_denormal = FPBits::max_subnormal().get_val();
static constexpr int N_ROUNDING_MODES = 4;
static constexpr fputil::testing::RoundingMode ROUNDING_MODES[4] = {
fputil::testing::RoundingMode::Nearest,
fputil::testing::RoundingMode::Upward,
fputil::testing::RoundingMode::Downward,
fputil::testing::RoundingMode::TowardZero,
};
};
} // namespace testing
} // namespace LIBC_NAMESPACE
#define DECLARE_SPECIAL_CONSTANTS(T) \
using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>; \
using StorageType = typename FPBits::StorageType; \
\
static constexpr StorageType STORAGE_MAX = \
LIBC_NAMESPACE::cpp::numeric_limits<StorageType>::max(); \
const T zero = FPBits::zero(Sign::POS).get_val(); \
const T neg_zero = FPBits::zero(Sign::NEG).get_val(); \
const T aNaN = FPBits::quiet_nan().get_val(); \
const T sNaN = FPBits::signaling_nan().get_val(); \
const T inf = FPBits::inf(Sign::POS).get_val(); \
const T neg_inf = FPBits::inf(Sign::NEG).get_val(); \
const T min_normal = FPBits::min_normal().get_val(); \
const T max_normal = FPBits::max_normal(Sign::POS).get_val(); \
const T neg_max_normal = FPBits::max_normal(Sign::NEG).get_val(); \
const T min_denormal = FPBits::min_subnormal(Sign::POS).get_val(); \
const T neg_min_denormal = FPBits::min_subnormal(Sign::NEG).get_val(); \
const T max_denormal = FPBits::max_subnormal().get_val(); \
static constexpr int UNKNOWN_MATH_ROUNDING_DIRECTION = 99; \
static constexpr LIBC_NAMESPACE::cpp::array<int, 6> \
MATH_ROUNDING_DIRECTIONS_INCLUDING_UNKNOWN = { \
FP_INT_UPWARD, FP_INT_DOWNWARD, \
FP_INT_TOWARDZERO, FP_INT_TONEARESTFROMZERO, \
FP_INT_TONEAREST, UNKNOWN_MATH_ROUNDING_DIRECTION, \
};
#define EXPECT_FP_EQ(expected, actual) \
EXPECT_THAT(actual, LIBC_NAMESPACE::testing::getMatcher< \
LIBC_NAMESPACE::testing::TestCond::EQ>(expected))
#define TEST_FP_EQ(expected, actual) \
LIBC_NAMESPACE::testing::getMatcher<LIBC_NAMESPACE::testing::TestCond::EQ>( \
expected) \
.match(actual)
#define EXPECT_FP_IS_NAN(actual) EXPECT_TRUE((actual) != (actual))
#define ASSERT_FP_EQ(expected, actual) \
ASSERT_THAT(actual, LIBC_NAMESPACE::testing::getMatcher< \
LIBC_NAMESPACE::testing::TestCond::EQ>(expected))
#define EXPECT_FP_NE(expected, actual) \
EXPECT_THAT(actual, LIBC_NAMESPACE::testing::getMatcher< \
LIBC_NAMESPACE::testing::TestCond::NE>(expected))
#define ASSERT_FP_NE(expected, actual) \
ASSERT_THAT(actual, LIBC_NAMESPACE::testing::getMatcher< \
LIBC_NAMESPACE::testing::TestCond::NE>(expected))
#define EXPECT_MATH_ERRNO(expected) \
do { \
if (math_errhandling & MATH_ERRNO) { \
int actual = LIBC_NAMESPACE::libc_errno; \
LIBC_NAMESPACE::libc_errno = 0; \
EXPECT_EQ(actual, expected); \
} \
} while (0)
#define ASSERT_MATH_ERRNO(expected) \
do { \
if (math_errhandling & MATH_ERRNO) { \
int actual = LIBC_NAMESPACE::libc_errno; \
LIBC_NAMESPACE::libc_errno = 0; \
ASSERT_EQ(actual, expected); \
} \
} while (0)
#define EXPECT_FP_EXCEPTION(expected) \
do { \
if (math_errhandling & MATH_ERREXCEPT) { \
EXPECT_GE(LIBC_NAMESPACE::fputil::test_except(FE_ALL_EXCEPT) & \
(expected), \
expected); \
} \
} while (0)
#define ASSERT_FP_EXCEPTION(expected) \
do { \
if (math_errhandling & MATH_ERREXCEPT) { \
ASSERT_GE(LIBC_NAMESPACE::fputil::test_except(FE_ALL_EXCEPT) & \
(expected), \
expected); \
} \
} while (0)
#define EXPECT_FP_EQ_WITH_EXCEPTION(expected_val, actual_val, expected_except) \
do { \
LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT); \
EXPECT_FP_EQ(expected_val, actual_val); \
if (math_errhandling & MATH_ERREXCEPT) { \
EXPECT_GE(LIBC_NAMESPACE::fputil::test_except(FE_ALL_EXCEPT) & \
(expected_except), \
expected_except); \
LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT); \
} \
} while (0)
#define EXPECT_FP_IS_NAN_WITH_EXCEPTION(actual_val, expected_except) \
do { \
LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT); \
EXPECT_FP_IS_NAN(actual_val); \
if (math_errhandling & MATH_ERREXCEPT) { \
EXPECT_GE(LIBC_NAMESPACE::fputil::test_except(FE_ALL_EXCEPT) & \
(expected_except), \
expected_except); \
LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT); \
} \
} while (0)
#define EXPECT_FP_EQ_ALL_ROUNDING(expected, actual) \
do { \
using namespace LIBC_NAMESPACE::fputil::testing; \
ForceRoundingMode __r1(RoundingMode::Nearest); \
if (__r1.success) { \
EXPECT_FP_EQ((expected), (actual)); \
} \
ForceRoundingMode __r2(RoundingMode::Upward); \
if (__r2.success) { \
EXPECT_FP_EQ((expected), (actual)); \
} \
ForceRoundingMode __r3(RoundingMode::Downward); \
if (__r3.success) { \
EXPECT_FP_EQ((expected), (actual)); \
} \
ForceRoundingMode __r4(RoundingMode::TowardZero); \
if (__r4.success) { \
EXPECT_FP_EQ((expected), (actual)); \
} \
} while (0)
#endif // LLVM_LIBC_TEST_UNITTEST_FPMATCHER_H
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