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//===-- Utility class to test different flavors of float div ----*- 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_SRC_MATH_DIVTEST_H
#define LLVM_LIBC_TEST_SRC_MATH_DIVTEST_H
#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
#include "utils/MPFRWrapper/MPFRUtils.h"
namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
template <typename OutType, typename InType>
class DivTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
struct InConstants {
DECLARE_SPECIAL_CONSTANTS(InType)
};
using InFPBits = typename InConstants::FPBits;
using InStorageType = typename InConstants::StorageType;
static constexpr InStorageType IN_MAX_NORMAL_U =
InFPBits::max_normal().uintval();
static constexpr InStorageType IN_MIN_NORMAL_U =
InFPBits::min_normal().uintval();
static constexpr InStorageType IN_MAX_SUBNORMAL_U =
InFPBits::max_subnormal().uintval();
static constexpr InStorageType IN_MIN_SUBNORMAL_U =
InFPBits::min_subnormal().uintval();
public:
using DivFunc = OutType (*)(InType, InType);
void test_subnormal_range(DivFunc func) {
constexpr InStorageType COUNT = 100'001;
constexpr InStorageType STEP =
(IN_MAX_SUBNORMAL_U - IN_MIN_SUBNORMAL_U) / COUNT;
for (InStorageType i = 0, v = 0, w = IN_MAX_SUBNORMAL_U; i <= COUNT;
++i, v += STEP, w -= STEP) {
InType x = InFPBits(v).get_val();
InType y = InFPBits(w).get_val();
mpfr::BinaryInput<InType> input{x, y};
ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Div, input, func(x, y),
0.5);
}
}
void test_normal_range(DivFunc func) {
constexpr InStorageType COUNT = 100'001;
constexpr InStorageType STEP = (IN_MAX_NORMAL_U - IN_MIN_NORMAL_U) / COUNT;
for (InStorageType i = 0, v = 0, w = IN_MAX_NORMAL_U; i <= COUNT;
++i, v += STEP, w -= STEP) {
InType x = InFPBits(v).get_val();
InType y = InFPBits(w).get_val();
mpfr::BinaryInput<InType> input{x, y};
ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Div, input, func(x, y),
0.5);
}
}
};
#define LIST_DIV_TESTS(OutType, InType, func) \
using LlvmLibcDivTest = DivTest<OutType, InType>; \
TEST_F(LlvmLibcDivTest, SubnormalRange) { test_subnormal_range(&func); } \
TEST_F(LlvmLibcDivTest, NormalRange) { test_normal_range(&func); }
#endif // LLVM_LIBC_TEST_SRC_MATH_DIVTEST_H
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