126 lines
4.6 KiB
C++
126 lines
4.6 KiB
C++
/***************************************************************************************************
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* Copyright (c) 2017 - 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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**************************************************************************************************/
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#include "cutlass_unit_test.h"
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#include <cutlass/trace.h>
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#include <cute/numeric/integral_constant.hpp>
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#include <cute/numeric/math.hpp>
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#include <cute/util/type_traits.hpp>
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// If cute::gcd returns auto instead of common_type_t<T, U>,
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// then GCC 7.5 reports the following error;
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//
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// ... /include/cute/numeric/math.hpp:103:26: error:
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// inconsistent deduction for auto return type: ‘int’ and then ‘bool’
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// if (u == 0) { return t; }
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// ^
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// Note that common_type_t<C<42>, C<1>>::value_type might still be bool.
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TEST(CuTe_core, gcd_returns_common_type)
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{
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using cute::C;
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constexpr auto fifteen = C<3 * 5>{};
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static_assert(cute::is_same_v<decltype(fifteen)::value_type, int>);
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static_assert(int(fifteen) == 15);
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constexpr auto forty_two = C<2 * 3 * 7>{};
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static_assert(cute::is_same_v<decltype(forty_two)::value_type, int>);
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static_assert(int(forty_two) == 42);
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// C<1>::value_type (as well as C<0>::value_type) may be bool.
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constexpr auto one = C<1>{};
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// Both inputs have value_type int.
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{
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constexpr auto result = cute::gcd(fifteen, forty_two);
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static_assert(cute::is_same_v<decltype(result)::value_type, int>);
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static_assert(int(result) == 3);
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}
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// One input has value_type int, and the other may have value_type bool.
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{
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constexpr auto result = cute::gcd(one, forty_two);
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static_assert(int(result) == 1);
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}
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{
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constexpr auto result = cute::gcd(forty_two, one);
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static_assert(int(result) == 1);
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}
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// Both inputs may have value_type bool.
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{
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constexpr auto result = cute::gcd(one, one);
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static_assert(int(result) == 1);
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}
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}
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TEST(CuTe_core, lcm_returns_common_type)
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{
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using cute::C;
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constexpr auto six = C<2 * 3>{};
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static_assert(cute::is_same_v<decltype(six)::value_type, int>);
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static_assert(int(six) == 6);
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constexpr auto fifteen = C<3 * 5>{};
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static_assert(cute::is_same_v<decltype(fifteen)::value_type, int>);
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static_assert(int(fifteen) == 15);
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// C<1>::value_type (as well as C<0>::value_type) may be bool.
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constexpr auto one = C<1>{};
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// Both inputs have value_type int.
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{
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constexpr auto result = cute::lcm(six, fifteen);
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static_assert(cute::is_same_v<decltype(result)::value_type, int>);
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static_assert(int(result) == 30);
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}
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// One input has value_type int, and the other may have value_type bool.
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{
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constexpr auto result = cute::lcm(one, six);
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static_assert(cute::is_same_v<decltype(result)::value_type, int>);
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static_assert(int(result) == 6);
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}
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{
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constexpr auto result = cute::lcm(six, one);
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static_assert(cute::is_same_v<decltype(result)::value_type, int>);
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static_assert(int(result) == 6);
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}
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// Both inputs may have value_type bool.
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{
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constexpr auto result = cute::lcm(one, one);
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static_assert(int(result) == 1);
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}
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}
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