| 1 | //===-- Utility class to test sqrt[f|l] -------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "test/UnitTest/FEnvSafeTest.h" |
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| 10 | #include "test/UnitTest/FPMatcher.h" |
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| 11 | #include "test/UnitTest/Test.h" |
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| 12 | #include "utils/MPFRWrapper/MPFRUtils.h" |
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| 13 | |
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| 14 | namespace mpfr = LIBC_NAMESPACE::testing::mpfr; |
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| 15 | |
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| 16 | template <typename OutType, typename InType> |
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| 17 | class SqrtTest : public LIBC_NAMESPACE::testing::FEnvSafeTest { |
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| 18 | |
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| 19 | DECLARE_SPECIAL_CONSTANTS(InType) |
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| 20 | |
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| 21 | static constexpr StorageType HIDDEN_BIT = |
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| 22 | StorageType(1) << LIBC_NAMESPACE::fputil::FPBits<InType>::FRACTION_LEN; |
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| 23 | |
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| 24 | public: |
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| 25 | using SqrtFunc = OutType (*)(InType); |
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| 26 | |
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| 27 | void test_denormal_values(SqrtFunc func) { |
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| 28 | for (StorageType mant = 1; mant < HIDDEN_BIT; mant <<= 1) { |
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| 29 | FPBits denormal(zero); |
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| 30 | denormal.set_mantissa(mant); |
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| 31 | InType x = denormal.get_val(); |
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| 32 | ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sqrt, x, func(x), 0.5); |
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| 33 | } |
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| 34 | |
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| 35 | constexpr StorageType COUNT = 200'001; |
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| 36 | constexpr StorageType STEP = HIDDEN_BIT / COUNT; |
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| 37 | for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) { |
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| 38 | InType x = FPBits(i).get_val(); |
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| 39 | ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sqrt, x, func(x), 0.5); |
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| 40 | } |
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| 41 | } |
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| 42 | |
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| 43 | void test_normal_range(SqrtFunc func) { |
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| 44 | constexpr StorageType COUNT = 200'001; |
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| 45 | constexpr StorageType STEP = STORAGE_MAX / COUNT; |
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| 46 | for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) { |
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| 47 | FPBits x_bits(v); |
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| 48 | InType x = x_bits.get_val(); |
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| 49 | if (x_bits.is_nan() || (x < 0)) |
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| 50 | continue; |
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| 51 | ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sqrt, x, func(x), 0.5); |
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| 52 | } |
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| 53 | } |
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| 54 | }; |
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| 55 | |
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| 56 | #define LIST_SQRT_TESTS(T, func) \ |
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| 57 | using LlvmLibcSqrtTest = SqrtTest<T, T>; \ |
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| 58 | TEST_F(LlvmLibcSqrtTest, DenormalValues) { test_denormal_values(&func); } \ |
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| 59 | TEST_F(LlvmLibcSqrtTest, NormalRange) { test_normal_range(&func); } |
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| 60 | |
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| 61 | #define LIST_NARROWING_SQRT_TESTS(OutType, InType, func) \ |
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| 62 | using LlvmLibcSqrtTest = SqrtTest<OutType, InType>; \ |
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| 63 | TEST_F(LlvmLibcSqrtTest, DenormalValues) { test_denormal_values(&func); } \ |
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| 64 | TEST_F(LlvmLibcSqrtTest, NormalRange) { test_normal_range(&func); } |
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| 65 | |
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