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1//===-- Utility class to test fixed-point round -----------------*- 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 "test/UnitTest/Test.h"10 11#include "src/__support/fixed_point/fx_rep.h"12 13template <typename T> class RoundTest : public LIBC_NAMESPACE::testing::Test {14 15 using FXRep = LIBC_NAMESPACE::fixed_point::FXRep<T>;16 static constexpr T zero = FXRep::ZERO();17 static constexpr T min = FXRep::MIN();18 static constexpr T max = FXRep::MAX();19 static constexpr T half = static_cast<T>(0.5);20 static constexpr T neg_half = static_cast<T>(-0.5);21 static constexpr T one =22 (FXRep::INTEGRAL_LEN > 0) ? static_cast<T>(1) : FXRep::MAX();23 static constexpr T neg_one = static_cast<T>(-1);24 static constexpr T eps = FXRep::EPS();25 26public:27 typedef T (*RoundFunc)(T, int);28 29 void testSpecialNumbers(RoundFunc func) {30 EXPECT_EQ(zero, func(zero, FXRep::FRACTION_LEN - 5));31 EXPECT_EQ(min, func(min, 0));32 EXPECT_EQ(max, func(max, FXRep::FRACTION_LEN));33 34 EXPECT_EQ(one, func(half, 0));35 EXPECT_EQ(half, func(half, 1));36 EXPECT_EQ(half, func(half, FXRep::FRACTION_LEN));37 EXPECT_EQ(one, func(half + eps, 0));38 EXPECT_EQ(half, func(half + eps, 1));39 EXPECT_EQ(half, func(half + eps, 2));40 EXPECT_EQ(zero, func(half - eps, 0));41 EXPECT_EQ(half, func(half - eps, 1));42 EXPECT_EQ(half, func(half - eps, 2));43 EXPECT_EQ(eps, func(eps, FXRep::FRACTION_LEN + 10));44 EXPECT_EQ(eps << 1, func(eps, FXRep::FRACTION_LEN - 1));45 EXPECT_EQ(zero, func(eps, FXRep::FRACTION_LEN - 2));46 47 if constexpr (FXRep::SIGN_LEN) {48 EXPECT_EQ(zero, func(neg_half, 0));49 EXPECT_EQ(neg_half, func(neg_half, 1));50 EXPECT_EQ(neg_half, func(neg_half, 3));51 EXPECT_EQ(zero, func(neg_half + eps, 0));52 EXPECT_EQ(neg_half, func(neg_half + eps, 1));53 EXPECT_EQ(neg_half, func(neg_half + eps, 2));54 EXPECT_EQ(neg_one, func(neg_half - eps, 0));55 EXPECT_EQ(neg_half, func(neg_half - eps, 1));56 EXPECT_EQ(neg_half, func(neg_half - eps, 2));57 EXPECT_EQ(-eps, func(-eps, FXRep::FRACTION_LEN + 10));58 }59 }60};61 62#define LIST_ROUND_TESTS(T, func) \63 using LlvmLibcRoundTest = RoundTest<T>; \64 TEST_F(LlvmLibcRoundTest, SpecialNumbers) { testSpecialNumbers(&func); } \65 static_assert(true, "Require semicolon.")66