837dab96d6
This adds a new test fixture class FEnvSafeTest (usable as a base class for other fixtures) that ensures each test doesn't perturb the `fenv_t` state that the next test will start with. It also provides types and methods tests can use to explicitly wrap code under test either to check that it doesn't perturb the state or to save and restore the state around particular test code. All the fenv and math tests are updated to use this so that none can affect another. Expectations that code under test and/or tests themselves don't perturb state can be added later.
93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
//===-- Utility class to test fmin[f|l] -------------------------*- 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_FMAXTEST_H
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#define LLVM_LIBC_TEST_SRC_MATH_FMAXTEST_H
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#include "test/UnitTest/FEnvSafeTest.h"
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#include "test/UnitTest/FPMatcher.h"
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#include "test/UnitTest/Test.h"
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#include "utils/MPFRWrapper/MPFRUtils.h"
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#include "hdr/math_macros.h"
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namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
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template <typename T>
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class FMaxTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
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DECLARE_SPECIAL_CONSTANTS(T)
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public:
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typedef T (*FMaxFunc)(T, T);
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void testNaN(FMaxFunc func) {
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EXPECT_FP_EQ(inf, func(aNaN, inf));
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EXPECT_FP_EQ(neg_inf, func(neg_inf, aNaN));
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EXPECT_FP_EQ(0.0, func(aNaN, 0.0));
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EXPECT_FP_EQ(-0.0, func(-0.0, aNaN));
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EXPECT_FP_EQ(T(-1.2345), func(aNaN, T(-1.2345)));
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EXPECT_FP_EQ(T(1.2345), func(T(1.2345), aNaN));
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EXPECT_FP_EQ(aNaN, func(aNaN, aNaN));
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}
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void testInfArg(FMaxFunc func) {
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EXPECT_FP_EQ(inf, func(neg_inf, inf));
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EXPECT_FP_EQ(inf, func(inf, 0.0));
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EXPECT_FP_EQ(inf, func(-0.0, inf));
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EXPECT_FP_EQ(inf, func(inf, T(1.2345)));
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EXPECT_FP_EQ(inf, func(T(-1.2345), inf));
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}
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void testNegInfArg(FMaxFunc func) {
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EXPECT_FP_EQ(inf, func(inf, neg_inf));
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EXPECT_FP_EQ(0.0, func(neg_inf, 0.0));
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EXPECT_FP_EQ(-0.0, func(-0.0, neg_inf));
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EXPECT_FP_EQ(T(-1.2345), func(neg_inf, T(-1.2345)));
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EXPECT_FP_EQ(T(1.2345), func(T(1.2345), neg_inf));
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}
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void testBothZero(FMaxFunc func) {
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EXPECT_FP_EQ(0.0, func(0.0, 0.0));
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EXPECT_FP_EQ(0.0, func(-0.0, 0.0));
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EXPECT_FP_EQ(0.0, func(0.0, -0.0));
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EXPECT_FP_EQ(-0.0, func(-0.0, -0.0));
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}
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void testRange(FMaxFunc func) {
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constexpr StorageType COUNT = 100'001;
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constexpr StorageType STEP = STORAGE_MAX / COUNT;
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for (StorageType i = 0, v = 0, w = STORAGE_MAX; i <= COUNT;
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++i, v += STEP, w -= STEP) {
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T x = FPBits(v).get_val(), y = FPBits(w).get_val();
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if (isnan(x) || isinf(x))
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continue;
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if (isnan(y) || isinf(y))
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continue;
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if ((x == 0) && (y == 0))
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continue;
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if (x > y) {
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EXPECT_FP_EQ(x, func(x, y));
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} else {
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EXPECT_FP_EQ(y, func(x, y));
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}
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}
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}
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};
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#define LIST_FMAX_TESTS(T, func) \
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using LlvmLibcFMaxTest = FMaxTest<T>; \
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TEST_F(LlvmLibcFMaxTest, NaN) { testNaN(&func); } \
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TEST_F(LlvmLibcFMaxTest, InfArg) { testInfArg(&func); } \
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TEST_F(LlvmLibcFMaxTest, NegInfArg) { testNegInfArg(&func); } \
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TEST_F(LlvmLibcFMaxTest, BothZero) { testBothZero(&func); } \
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TEST_F(LlvmLibcFMaxTest, Range) { testRange(&func); }
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#endif // LLVM_LIBC_TEST_SRC_MATH_FMAXTEST_H
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