Mirza Halilcevic
11e92e0fdd
Change-Id: I7cdf56008dce2551706bc5c0ab1a49133a6337e9
[ROCm/hip-tests commit: 16128f659a]
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/*
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Copyright (c) 2023 Advanced Micro Devices, Inc. All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#pragma once
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#include <cmath>
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template <size_t fractional_bits> class FixedPoint {
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public:
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FixedPoint() = default;
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FixedPoint(float x) { fixed_point_ = static_cast<int16_t>(roundf(x * (1 << fractional_bits))); }
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operator float() const {
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return (static_cast<float>(fixed_point_) / static_cast<float>(1 << fractional_bits));
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}
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FixedPoint operator+(FixedPoint other) const {
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FixedPoint<fractional_bits> res;
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res.fixed_point_ = fixed_point_ + other.fixed_point_;
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return res;
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}
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FixedPoint operator-(FixedPoint other) const {
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FixedPoint<fractional_bits> res;
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res.fixed_point_ = fixed_point_ - other.fixed_point_;
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return res;
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}
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FixedPoint operator*(FixedPoint other) const {
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constexpr auto K = 1 << (fractional_bits - 1);
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FixedPoint<fractional_bits> res;
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int32_t temp;
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temp = static_cast<int32_t>(fixed_point_) * static_cast<int32_t>(other.fixed_point_);
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temp += K;
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res.fixed_point_ = Sat16(temp >> fractional_bits);
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return res;
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}
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private:
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int16_t fixed_point_;
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int16_t Sat16(int32_t x) const {
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if (x > 0x7FFF)
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return 0x7FFF;
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else if (x < -0x8000)
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return -0x8000;
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else
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return (int16_t)x;
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}
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}; |