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| /*************************************************************************************************** | |
| * Copyright (c) 2023 - 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved. | |
| * SPDX-License-Identifier: BSD-3-Clause | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are met: | |
| * | |
| * 1. Redistributions of source code must retain the above copyright notice, this | |
| * list of conditions and the following disclaimer. | |
| * | |
| * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| * this list of conditions and the following disclaimer in the documentation | |
| * and/or other materials provided with the distribution. | |
| * | |
| * 3. Neither the name of the copyright holder nor the names of its | |
| * contributors may be used to endorse or promote products derived from | |
| * this software without specific prior written permission. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
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| * | |
| **************************************************************************************************/ | |
| namespace cute | |
| { | |
| // | |
| // Accept mutable temporaries | |
| // | |
| template <class Alpha, | |
| class XEngine, class XLayout, | |
| class Beta, | |
| class YEngine, class YLayout, | |
| class PrdTensor = TrivialPredTensor> | |
| CUTE_HOST_DEVICE | |
| void | |
| axpby(Alpha const& alpha, | |
| Tensor<XEngine, XLayout> const& x, | |
| Beta const& beta, | |
| Tensor<YEngine, YLayout> && y, | |
| PrdTensor const& p = {}) | |
| { | |
| return axpby(alpha, x, beta, y, p); | |
| } | |
| // | |
| // AXPBY | |
| // | |
| template <class Alpha, | |
| class XEngine, class XLayout, | |
| class Beta, | |
| class YEngine, class YLayout, | |
| class PrdTensor = TrivialPredTensor> | |
| CUTE_HOST_DEVICE | |
| void | |
| axpby(Alpha const& alpha, | |
| Tensor<XEngine, XLayout> const& x, | |
| Beta const& beta, | |
| Tensor<YEngine, YLayout> & y, | |
| PrdTensor const& p = {}) | |
| { | |
| auto isBetaZero = [&] () { | |
| if constexpr (is_complex<Beta>::value) { | |
| return beta.real() == Int<0>{} && beta.imag() == Int<0>{}; | |
| } | |
| else { | |
| return beta == Int<0>{}; | |
| } | |
| CUTE_GCC_UNREACHABLE; | |
| } (); | |
| CUTE_UNROLL | |
| for (int i = 0; i < size(x); ++i) { | |
| if (p(i)) { | |
| y(i) = (isBetaZero ? alpha * x(i) : alpha * x(i) + beta * y(i)); | |
| } | |
| } | |
| } | |
| } // end namespace cute | |