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bitmask_or implementation with bitmask refactor (rapidsai#7406)
Refactors the bitmask merging functionality to support any binary function, allowing for `bitwise_or` support in addition the existing `bitwise_and` support. Includes changes to the Java api and JNI to access the `bitwise_or` functionality. Authors: - @rwlee Approvers: - Jason Lowe (@jlowe) - Jake Hemstad (@jrhemstad) - Christopher Harris (@cwharris) URL: rapidsai#7406
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| /* | ||
| * Copyright (c) 2021, NVIDIA CORPORATION. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| #pragma once | ||
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| #include <cudf/column/column_device_view.cuh> | ||
| #include <cudf/detail/utilities/cuda.cuh> | ||
| #include <cudf/null_mask.hpp> | ||
| #include <cudf/types.hpp> | ||
| #include <cudf/utilities/span.hpp> | ||
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| #include <rmm/cuda_stream_view.hpp> | ||
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| using cudf::detail::device_span; | ||
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| namespace cudf { | ||
| namespace detail { | ||
| /** | ||
| * @brief Computes the merger of an array of bitmasks using a binary operator | ||
| * | ||
| * @param op The binary operator used to combine the bitmasks | ||
| * @param destination The bitmask to write result into | ||
| * @param source Array of source mask pointers. All masks must be of same size | ||
| * @param source_begin_bits Array of offsets into corresponding @p source masks. | ||
| * Must be same size as source array | ||
| * @param source_size_bits Number of bits in each mask in @p source | ||
| */ | ||
| template <typename Binop> | ||
| __global__ void offset_bitmask_binop(Binop op, | ||
| device_span<bitmask_type> destination, | ||
| device_span<bitmask_type const *> source, | ||
| device_span<size_type const> source_begin_bits, | ||
| size_type source_size_bits) | ||
| { | ||
| for (size_type destination_word_index = threadIdx.x + blockIdx.x * blockDim.x; | ||
| destination_word_index < destination.size(); | ||
| destination_word_index += blockDim.x * gridDim.x) { | ||
| bitmask_type destination_word = | ||
| detail::get_mask_offset_word(source[0], | ||
| destination_word_index, | ||
| source_begin_bits[0], | ||
| source_begin_bits[0] + source_size_bits); | ||
| for (size_type i = 1; i < source.size(); i++) { | ||
| destination_word = | ||
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| op(destination_word, | ||
| detail::get_mask_offset_word(source[i], | ||
| destination_word_index, | ||
| source_begin_bits[i], | ||
| source_begin_bits[i] + source_size_bits)); | ||
| } | ||
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| destination[destination_word_index] = destination_word; | ||
| } | ||
| } | ||
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| /** | ||
| * @copydoc bitmask_binop(Binop op, host_span<bitmask_type const *> const, host_span<size_type> | ||
| * const, size_type, rmm::mr::device_memory_resource *) | ||
| * | ||
| * @param stream CUDA stream used for device memory operations and kernel launches | ||
| */ | ||
| template <typename Binop> | ||
| rmm::device_buffer bitmask_binop( | ||
| Binop op, | ||
| host_span<bitmask_type const *> masks, | ||
| host_span<size_type const> masks_begin_bits, | ||
| size_type mask_size_bits, | ||
| rmm::cuda_stream_view stream, | ||
| rmm::mr::device_memory_resource *mr = rmm::mr::get_current_device_resource()) | ||
| { | ||
| auto dest_mask = rmm::device_buffer{bitmask_allocation_size_bytes(mask_size_bits), stream, mr}; | ||
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| inplace_bitmask_binop(op, | ||
| device_span<bitmask_type>(static_cast<bitmask_type *>(dest_mask.data()), | ||
| num_bitmask_words(mask_size_bits)), | ||
| masks, | ||
| masks_begin_bits, | ||
| mask_size_bits, | ||
| stream, | ||
| mr); | ||
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| return dest_mask; | ||
| } | ||
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| /** | ||
| * @brief Performs a merge of the specified bitmasks using the binary operator | ||
| * provided, and writes in place to destination | ||
| * | ||
| * @param op The binary operator used to combine the bitmasks | ||
| * @param dest_mask Destination to which the merged result is written | ||
| * @param masks The list of data pointers of the bitmasks to be merged | ||
| * @param masks_begin_bits The bit offsets from which each mask is to be merged | ||
| * @param mask_size_bits The number of bits to be ANDed in each mask | ||
| * @param stream CUDA stream used for device memory operations and kernel launches | ||
| * @param mr Device memory resource used to allocate the returned device_buffer | ||
| * @return rmm::device_buffer Output bitmask | ||
| */ | ||
| template <typename Binop> | ||
| void inplace_bitmask_binop( | ||
| Binop op, | ||
| device_span<bitmask_type> dest_mask, | ||
| host_span<bitmask_type const *> masks, | ||
| host_span<size_type const> masks_begin_bits, | ||
| size_type mask_size_bits, | ||
| rmm::cuda_stream_view stream, | ||
| rmm::mr::device_memory_resource *mr = rmm::mr::get_current_device_resource()) | ||
| { | ||
| CUDF_EXPECTS( | ||
| std::all_of(masks_begin_bits.begin(), masks_begin_bits.end(), [](auto b) { return b >= 0; }), | ||
| "Invalid range."); | ||
| CUDF_EXPECTS(mask_size_bits > 0, "Invalid bit range."); | ||
| CUDF_EXPECTS(std::all_of(masks.begin(), masks.end(), [](auto p) { return p != nullptr; }), | ||
| "Mask pointer cannot be null"); | ||
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| rmm::device_uvector<bitmask_type const *> d_masks(masks.size(), stream, mr); | ||
| rmm::device_uvector<size_type> d_begin_bits(masks_begin_bits.size(), stream, mr); | ||
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| CUDA_TRY(cudaMemcpyAsync( | ||
| d_masks.data(), masks.data(), masks.size_bytes(), cudaMemcpyHostToDevice, stream.value())); | ||
| CUDA_TRY(cudaMemcpyAsync(d_begin_bits.data(), | ||
| masks_begin_bits.data(), | ||
| masks_begin_bits.size_bytes(), | ||
| cudaMemcpyHostToDevice, | ||
| stream.value())); | ||
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| cudf::detail::grid_1d config(dest_mask.size(), 256); | ||
| offset_bitmask_binop<<<config.num_blocks, config.num_threads_per_block, 0, stream.value()>>>( | ||
| op, dest_mask, d_masks, d_begin_bits, mask_size_bits); | ||
| CHECK_CUDA(stream.value()); | ||
| stream.synchronize(); | ||
| } | ||
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| } // namespace detail | ||
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| } // namespace cudf |
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