mirror of
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78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015-2022 Advanced Micro Devices, Inc. All rights reserved.
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*
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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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*
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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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*
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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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#include <migraphx/gpu/device/nonzero.hpp>
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#include <migraphx/gpu/device/float_equal.hpp>
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#include <migraphx/gpu/device/scan.hpp>
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#include <migraphx/gpu/device/reduce_ops.hpp>
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namespace migraphx {
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inline namespace MIGRAPHX_INLINE_NS {
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namespace gpu {
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namespace device {
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argument nonzero(hipStream_t stream, const argument& result, const argument& arg_data)
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{
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auto s = arg_data.get_shape();
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auto elem_num = s.elements();
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auto out_elem_num = result.get_shape().elements();
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// call the prefix_sum function to do a prefix_sum to compute
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// index in the output. Only 1 block can be used since we have
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// only one prefix sum
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const index_int block_size = 256;
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hip_visit_all(arg_data, s)([&](auto input, auto si) {
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const auto* in_ptr = device_cast(input.data());
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auto* ptr = result.cast<int64_t>();
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gs_launch(stream, block_size, block_size)([=](auto, auto idx) __device__ {
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// fill all output to 0 first
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idx.local_stride(out_elem_num, [&](auto j) { ptr[j] = 0; });
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block_scan<block_size>(
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idx,
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sum{},
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0,
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elem_num,
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[&](auto j) { return (float_equal(in_ptr[j], 0)) ? 0 : 1; },
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[&](auto j, auto x) {
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auto out_loc = x - 1;
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if(float_equal(in_ptr[j], 0))
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return;
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auto index = si.multi(j);
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for(size_t k = 0; k < index.size(); ++k)
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{
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ptr[k * elem_num + out_loc] = index[k];
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}
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});
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});
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});
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return result;
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}
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} // namespace device
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} // namespace gpu
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} // namespace MIGRAPHX_INLINE_NS
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} // namespace migraphx
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