| //===-- Utility class to test fixed-point round -----------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "test/UnitTest/Test.h" |
| |
| #include "src/__support/fixed_point/fx_rep.h" |
| |
| template <typename T> class RoundTest : public LIBC_NAMESPACE::testing::Test { |
| |
| using FXRep = LIBC_NAMESPACE::fixed_point::FXRep<T>; |
| static constexpr T zero = FXRep::ZERO(); |
| static constexpr T min = FXRep::MIN(); |
| static constexpr T max = FXRep::MAX(); |
| static constexpr T half = static_cast<T>(0.5); |
| static constexpr T neg_half = static_cast<T>(-0.5); |
| static constexpr T one = |
| (FXRep::INTEGRAL_LEN > 0) ? static_cast<T>(1) : FXRep::MAX(); |
| static constexpr T neg_one = static_cast<T>(-1); |
| static constexpr T eps = FXRep::EPS(); |
| |
| public: |
| typedef T (*RoundFunc)(T, int); |
| |
| void testSpecialNumbers(RoundFunc func) { |
| EXPECT_EQ(zero, func(zero, FXRep::FRACTION_LEN - 5)); |
| EXPECT_EQ(min, func(min, 0)); |
| EXPECT_EQ(max, func(max, FXRep::FRACTION_LEN)); |
| |
| EXPECT_EQ(one, func(half, 0)); |
| EXPECT_EQ(half, func(half, 1)); |
| EXPECT_EQ(half, func(half, FXRep::FRACTION_LEN)); |
| EXPECT_EQ(one, func(half + eps, 0)); |
| EXPECT_EQ(half, func(half + eps, 1)); |
| EXPECT_EQ(half, func(half + eps, 2)); |
| EXPECT_EQ(zero, func(half - eps, 0)); |
| EXPECT_EQ(half, func(half - eps, 1)); |
| EXPECT_EQ(half, func(half - eps, 2)); |
| EXPECT_EQ(eps, func(eps, FXRep::FRACTION_LEN + 10)); |
| EXPECT_EQ(eps << 1, func(eps, FXRep::FRACTION_LEN - 1)); |
| EXPECT_EQ(zero, func(eps, FXRep::FRACTION_LEN - 2)); |
| |
| if constexpr (FXRep::SIGN_LEN) { |
| EXPECT_EQ(zero, func(neg_half, 0)); |
| EXPECT_EQ(neg_half, func(neg_half, 1)); |
| EXPECT_EQ(neg_half, func(neg_half, 3)); |
| EXPECT_EQ(zero, func(neg_half + eps, 0)); |
| EXPECT_EQ(neg_half, func(neg_half + eps, 1)); |
| EXPECT_EQ(neg_half, func(neg_half + eps, 2)); |
| EXPECT_EQ(neg_one, func(neg_half - eps, 0)); |
| EXPECT_EQ(neg_half, func(neg_half - eps, 1)); |
| EXPECT_EQ(neg_half, func(neg_half - eps, 2)); |
| EXPECT_EQ(-eps, func(-eps, FXRep::FRACTION_LEN + 10)); |
| } |
| } |
| }; |
| |
| #define LIST_ROUND_TESTS(T, func) \ |
| using LlvmLibcRoundTest = RoundTest<T>; \ |
| TEST_F(LlvmLibcRoundTest, SpecialNumbers) { testSpecialNumbers(&func); } \ |
| static_assert(true, "Require semicolon.") |