85 lines · c
1//===-- Utility class to test different flavors of fdim ---------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===---------------------------------------------------------------------===//8 9#include "hdr/math_macros.h"10#include "src/__support/FPUtil/BasicOperations.h"11#include "src/__support/FPUtil/FPBits.h"12#include "test/UnitTest/FEnvSafeTest.h"13#include "test/UnitTest/FPMatcher.h"14#include "test/UnitTest/Test.h"15 16using LIBC_NAMESPACE::Sign;17 18template <typename T>19class FDimTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {20public:21 using FuncPtr = T (*)(T, T);22 using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>;23 using StorageType = typename FPBits::StorageType;24 25 const T inf = FPBits::inf(Sign::POS).get_val();26 const T neg_inf = FPBits::inf(Sign::NEG).get_val();27 const T zero = FPBits::zero(Sign::POS).get_val();28 const T neg_zero = FPBits::zero(Sign::NEG).get_val();29 const T nan = FPBits::quiet_nan().get_val();30 31 void test_na_n_arg(FuncPtr func) {32 EXPECT_FP_EQ(nan, func(nan, inf));33 EXPECT_FP_EQ(nan, func(neg_inf, nan));34 EXPECT_FP_EQ(nan, func(nan, zero));35 EXPECT_FP_EQ(nan, func(neg_zero, nan));36 EXPECT_FP_EQ(nan, func(nan, T(-1.2345)));37 EXPECT_FP_EQ(nan, func(T(1.2345), nan));38 EXPECT_FP_EQ(func(nan, nan), nan);39 }40 41 void test_inf_arg(FuncPtr func) {42 EXPECT_FP_EQ(zero, func(neg_inf, inf));43 EXPECT_FP_EQ(inf, func(inf, zero));44 EXPECT_FP_EQ(zero, func(neg_zero, inf));45 EXPECT_FP_EQ(inf, func(inf, T(1.2345)));46 EXPECT_FP_EQ(zero, func(T(-1.2345), inf));47 }48 49 void test_neg_inf_arg(FuncPtr func) {50 EXPECT_FP_EQ(inf, func(inf, neg_inf));51 EXPECT_FP_EQ(zero, func(neg_inf, zero));52 EXPECT_FP_EQ(inf, func(neg_zero, neg_inf));53 EXPECT_FP_EQ(zero, func(neg_inf, T(-1.2345)));54 EXPECT_FP_EQ(inf, func(T(1.2345), neg_inf));55 }56 57 void test_both_zero(FuncPtr func) {58 EXPECT_FP_EQ(zero, func(zero, zero));59 EXPECT_FP_EQ(zero, func(zero, neg_zero));60 EXPECT_FP_EQ(zero, func(neg_zero, zero));61 EXPECT_FP_EQ(zero, func(neg_zero, neg_zero));62 }63 64 void test_in_range(FuncPtr func) {65 constexpr StorageType STORAGE_MAX =66 LIBC_NAMESPACE::cpp::numeric_limits<StorageType>::max();67 constexpr StorageType COUNT = 100'001;68 constexpr StorageType STEP = STORAGE_MAX / COUNT;69 for (StorageType i = 0, v = 0, w = STORAGE_MAX; i <= COUNT;70 ++i, v += STEP, w -= STEP) {71 T x = FPBits(v).get_val(), y = FPBits(w).get_val();72 if (FPBits(v).is_nan() || FPBits(v).is_inf())73 continue;74 if (FPBits(w).is_nan() || FPBits(w).is_inf())75 continue;76 77 if (x > y) {78 EXPECT_FP_EQ(x - y, func(x, y));79 } else {80 EXPECT_FP_EQ(zero, func(x, y));81 }82 }83 }84};85