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65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
/* Quicktex Texture Compression Library
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Copyright (C) 2021 Andrew Cassidy <drewcassidy@me.com>
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Partially derived from rgbcx.h written by Richard Geldreich <richgel99@gmail.com>
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and licenced under the public domain
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "TestSIMD.h"
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#include <hwy/highway.h>
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#include <array>
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#include <cassert>
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#include <cstdint>
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#include <numeric>
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#include "../VecUtil.h"
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namespace hn = hwy::HWY_NAMESPACE;
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namespace quicktex::tests {
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void TestWidenSumS16() {
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const hn::ScalableTag<int16_t> tag;
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const auto vec_size = hn::MaxLanes(tag);
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std::array<int16_t, vec_size> buffer;
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std::iota(buffer.begin(), buffer.end(), 1);
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auto v = hn::Load(tag, &buffer[0]);
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auto sum = WideningSumS16(v);
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assert(sum == vec_size / 2 * (vec_size + 1)); // Gauss formula
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buffer.fill(1);
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v = hn::Load(tag, &buffer[0]);
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sum = WideningSumS16(v);
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assert(sum == vec_size);
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buffer.fill(0);
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v = hn::Load(tag, &buffer[0]);
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sum= WideningSumS16(v);
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assert(sum == 0);
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buffer.fill(std::numeric_limits<int16_t>::max());
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v = hn::Load(tag, &buffer[0]);
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sum= WideningSumS16(v);
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assert(sum == std::numeric_limits<int16_t>::max() * (int)vec_size);
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buffer.fill(std::numeric_limits<int16_t>::min());
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v = hn::Load(tag, &buffer[0]);
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sum= WideningSumS16(v);
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assert(sum == std::numeric_limits<int16_t>::min() * (int)vec_size);
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}
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} // namespace quicktex::tests
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