forked from OSchip/llvm-project
559 lines
21 KiB
C++
559 lines
21 KiB
C++
//===- SparseUtils.cpp - Sparse Utils for MLIR execution ------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a light-weight runtime support library that is useful
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// for sparse tensor manipulations. The functionality provided in this library
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// is meant to simplify benchmarking, testing, and debugging MLIR code that
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// operates on sparse tensors. The provided functionality is **not** part
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// of core MLIR, however.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/ExecutionEngine/CRunnerUtils.h"
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#ifdef MLIR_CRUNNERUTILS_DEFINE_FUNCTIONS
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#include <algorithm>
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#include <cassert>
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#include <cctype>
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#include <cinttypes>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <vector>
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//===----------------------------------------------------------------------===//
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//
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// Internal support for storing and reading sparse tensors.
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//
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// The following memory-resident sparse storage schemes are supported:
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//
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// (a) A coordinate scheme for temporarily storing and lexicographically
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// sorting a sparse tensor by index.
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//
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// (b) A "one-size-fits-all" sparse storage scheme defined by per-rank
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// sparse/dense annnotations to be used by generated MLIR code.
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//
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// The following external formats are supported:
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//
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// (1) Matrix Market Exchange (MME): *.mtx
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// https://math.nist.gov/MatrixMarket/formats.html
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//
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// (2) Formidable Repository of Open Sparse Tensors and Tools (FROSTT): *.tns
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// http://frostt.io/tensors/file-formats.html
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//
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//===----------------------------------------------------------------------===//
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namespace {
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/// A sparse tensor element in coordinate scheme (value and indices).
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/// For example, a rank-1 vector element would look like
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/// ({i}, a[i])
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/// and a rank-5 tensor element like
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/// ({i,j,k,l,m}, a[i,j,k,l,m])
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struct Element {
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Element(const std::vector<uint64_t> &ind, double val)
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: indices(ind), value(val){};
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std::vector<uint64_t> indices;
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double value;
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};
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/// A memory-resident sparse tensor in coordinate scheme (collection of
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/// elements). This data structure is used to read a sparse tensor from
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/// external file format into memory and sort the elements lexicographically
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/// by indices before passing it back to the client (most packed storage
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/// formats require the elements to appear in lexicographic index order).
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struct SparseTensor {
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public:
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SparseTensor(const std::vector<uint64_t> &szs, uint64_t capacity)
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: sizes(szs), pos(0) {
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elements.reserve(capacity);
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}
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/// Adds element as indices and value.
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void add(const std::vector<uint64_t> &ind, double val) {
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assert(getRank() == ind.size());
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for (int64_t r = 0, rank = getRank(); r < rank; r++)
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assert(ind[r] < sizes[r]); // within bounds
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elements.emplace_back(Element(ind, val));
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}
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/// Sorts elements lexicographically by index.
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void sort() { std::sort(elements.begin(), elements.end(), lexOrder); }
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/// Primitive one-time iteration.
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const Element &next() { return elements[pos++]; }
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/// Returns rank.
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uint64_t getRank() const { return sizes.size(); }
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/// Getter for sizes array.
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const std::vector<uint64_t> &getSizes() const { return sizes; }
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/// Getter for elements array.
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const std::vector<Element> &getElements() const { return elements; }
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private:
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/// Returns true if indices of e1 < indices of e2.
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static bool lexOrder(const Element &e1, const Element &e2) {
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assert(e1.indices.size() == e2.indices.size());
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for (int64_t r = 0, rank = e1.indices.size(); r < rank; r++) {
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if (e1.indices[r] == e2.indices[r])
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continue;
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return e1.indices[r] < e2.indices[r];
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}
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return false;
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}
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std::vector<uint64_t> sizes; // per-rank dimension sizes
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std::vector<Element> elements;
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uint64_t pos;
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};
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/// Abstract base class of sparse tensor storage. Note that we use
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/// function overloading to implement "partial" method specialization.
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class SparseTensorStorageBase {
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public:
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enum DimLevelType : uint8_t { kDense = 0, kCompressed = 1, kSingleton = 2 };
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virtual uint64_t getDimSize(uint64_t) = 0;
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// Overhead storage.
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virtual void getPointers(std::vector<uint64_t> **, uint64_t) { fatal("p64"); }
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virtual void getPointers(std::vector<uint32_t> **, uint64_t) { fatal("p32"); }
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virtual void getPointers(std::vector<uint16_t> **, uint64_t) { fatal("p16"); }
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virtual void getPointers(std::vector<uint8_t> **, uint64_t) { fatal("p8"); }
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virtual void getIndices(std::vector<uint64_t> **, uint64_t) { fatal("i64"); }
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virtual void getIndices(std::vector<uint32_t> **, uint64_t) { fatal("i32"); }
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virtual void getIndices(std::vector<uint16_t> **, uint64_t) { fatal("i16"); }
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virtual void getIndices(std::vector<uint8_t> **, uint64_t) { fatal("i8"); }
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// Primary storage.
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virtual void getValues(std::vector<double> **) { fatal("valf64"); }
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virtual void getValues(std::vector<float> **) { fatal("valf32"); }
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virtual void getValues(std::vector<int64_t> **) { fatal("vali64"); }
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virtual void getValues(std::vector<int32_t> **) { fatal("vali32"); }
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virtual void getValues(std::vector<int16_t> **) { fatal("vali16"); }
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virtual void getValues(std::vector<int8_t> **) { fatal("vali8"); }
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virtual ~SparseTensorStorageBase() {}
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private:
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void fatal(const char *tp) {
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fprintf(stderr, "unsupported %s\n", tp);
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exit(1);
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}
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};
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/// A memory-resident sparse tensor using a storage scheme based on per-rank
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/// annotations on dense/sparse. This data structure provides a bufferized
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/// form of an imaginary SparseTensorType, until such a type becomes a
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/// first-class citizen of MLIR. In contrast to generating setup methods for
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/// each differently annotated sparse tensor, this method provides a convenient
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/// "one-size-fits-all" solution that simply takes an input tensor and
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/// annotations to implement all required setup in a general manner.
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template <typename P, typename I, typename V>
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class SparseTensorStorage : public SparseTensorStorageBase {
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public:
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/// Constructs sparse tensor storage scheme following the given
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/// per-rank dimension dense/sparse annotations.
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SparseTensorStorage(SparseTensor *tensor, uint8_t *sparsity)
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: sizes(tensor->getSizes()), pointers(getRank()), indices(getRank()) {
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// Provide hints on capacity.
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// TODO: needs fine-tuning based on sparsity
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uint64_t nnz = tensor->getElements().size();
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values.reserve(nnz);
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for (uint64_t d = 0, s = 1, rank = getRank(); d < rank; d++) {
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s *= sizes[d];
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if (sparsity[d] == kCompressed) {
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pointers[d].reserve(s + 1);
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indices[d].reserve(s);
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s = 1;
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} else {
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assert(sparsity[d] == kDense && "singleton not yet supported");
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}
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}
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// Then setup the tensor.
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traverse(tensor, sparsity, 0, nnz, 0);
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}
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virtual ~SparseTensorStorage() {}
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uint64_t getRank() const { return sizes.size(); }
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uint64_t getDimSize(uint64_t d) override { return sizes[d]; }
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// Partially specialize these three methods based on template types.
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void getPointers(std::vector<P> **out, uint64_t d) override {
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*out = &pointers[d];
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}
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void getIndices(std::vector<I> **out, uint64_t d) override {
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*out = &indices[d];
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}
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void getValues(std::vector<V> **out) override { *out = &values; }
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private:
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/// Initializes sparse tensor storage scheme from a memory-resident
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/// representation of an external sparse tensor. This method prepares
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/// the pointers and indices arrays under the given per-rank dimension
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/// dense/sparse annotations.
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void traverse(SparseTensor *tensor, uint8_t *sparsity, uint64_t lo,
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uint64_t hi, uint64_t d) {
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const std::vector<Element> &elements = tensor->getElements();
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// Once dimensions are exhausted, insert the numerical values.
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if (d == getRank()) {
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values.push_back(lo < hi ? elements[lo].value : 0.0);
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return;
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}
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// Prepare a sparse pointer structure at this dimension.
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if (sparsity[d] == kCompressed && pointers[d].empty())
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pointers[d].push_back(0);
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// Visit all elements in this interval.
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uint64_t full = 0;
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while (lo < hi) {
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// Find segment in interval with same index elements in this dimension.
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unsigned idx = elements[lo].indices[d];
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unsigned seg = lo + 1;
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while (seg < hi && elements[seg].indices[d] == idx)
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seg++;
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// Handle segment in interval for sparse or dense dimension.
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if (sparsity[d] == kCompressed) {
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indices[d].push_back(idx);
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} else {
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for (; full < idx; full++)
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traverse(tensor, sparsity, 0, 0, d + 1); // pass empty
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full++;
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}
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traverse(tensor, sparsity, lo, seg, d + 1);
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// And move on to next segment in interval.
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lo = seg;
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}
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// Finalize the sparse pointer structure at this dimension.
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if (sparsity[d] == kCompressed) {
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pointers[d].push_back(indices[d].size());
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} else {
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for (uint64_t sz = tensor->getSizes()[d]; full < sz; full++)
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traverse(tensor, sparsity, 0, 0, d + 1); // pass empty
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}
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}
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private:
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std::vector<uint64_t> sizes; // per-rank dimension sizes
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std::vector<std::vector<P>> pointers;
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std::vector<std::vector<I>> indices;
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std::vector<V> values;
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};
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/// Helper to convert string to lower case.
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static char *toLower(char *token) {
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for (char *c = token; *c; c++)
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*c = tolower(*c);
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return token;
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}
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/// Read the MME header of a general sparse matrix of type real.
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static void readMMEHeader(FILE *file, char *name, uint64_t *idata) {
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char line[1025];
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char header[64];
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char object[64];
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char format[64];
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char field[64];
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char symmetry[64];
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// Read header line.
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if (fscanf(file, "%63s %63s %63s %63s %63s\n", header, object, format, field,
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symmetry) != 5) {
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fprintf(stderr, "Corrupt header in %s\n", name);
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exit(1);
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}
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// Make sure this is a general sparse matrix.
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if (strcmp(toLower(header), "%%matrixmarket") ||
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strcmp(toLower(object), "matrix") ||
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strcmp(toLower(format), "coordinate") || strcmp(toLower(field), "real") ||
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strcmp(toLower(symmetry), "general")) {
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fprintf(stderr,
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"Cannot find a general sparse matrix with type real in %s\n", name);
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exit(1);
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}
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// Skip comments.
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while (1) {
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if (!fgets(line, 1025, file)) {
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fprintf(stderr, "Cannot find data in %s\n", name);
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exit(1);
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}
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if (line[0] != '%')
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break;
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}
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// Next line contains M N NNZ.
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idata[0] = 2; // rank
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if (sscanf(line, "%" PRIu64 "%" PRIu64 "%" PRIu64 "\n", idata + 2, idata + 3,
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idata + 1) != 3) {
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fprintf(stderr, "Cannot find size in %s\n", name);
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exit(1);
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}
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}
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/// Read the "extended" FROSTT header. Although not part of the documented
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/// format, we assume that the file starts with optional comments followed
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/// by two lines that define the rank, the number of nonzeros, and the
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/// dimensions sizes (one per rank) of the sparse tensor.
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static void readExtFROSTTHeader(FILE *file, char *name, uint64_t *idata) {
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char line[1025];
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// Skip comments.
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while (1) {
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if (!fgets(line, 1025, file)) {
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fprintf(stderr, "Cannot find data in %s\n", name);
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exit(1);
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}
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if (line[0] != '#')
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break;
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}
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// Next line contains RANK and NNZ.
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if (sscanf(line, "%" PRIu64 "%" PRIu64 "\n", idata, idata + 1) != 2) {
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fprintf(stderr, "Cannot find metadata in %s\n", name);
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exit(1);
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}
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// Followed by a line with the dimension sizes (one per rank).
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for (uint64_t r = 0; r < idata[0]; r++) {
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if (fscanf(file, "%" PRIu64, idata + 2 + r) != 1) {
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fprintf(stderr, "Cannot find dimension size %s\n", name);
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exit(1);
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}
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}
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}
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/// Reads a sparse tensor with the given filename into a memory-resident
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/// sparse tensor in coordinate scheme.
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static SparseTensor *openTensor(char *filename, uint64_t *perm) {
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// Open the file.
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FILE *file = fopen(filename, "r");
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if (!file) {
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fprintf(stderr, "Cannot find %s\n", filename);
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exit(1);
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}
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// Perform some file format dependent set up.
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uint64_t idata[512];
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if (strstr(filename, ".mtx")) {
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readMMEHeader(file, filename, idata);
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} else if (strstr(filename, ".tns")) {
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readExtFROSTTHeader(file, filename, idata);
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} else {
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fprintf(stderr, "Unknown format %s\n", filename);
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exit(1);
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}
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// Prepare sparse tensor object with per-rank dimension sizes
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// and the number of nonzeros as initial capacity.
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uint64_t rank = idata[0];
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uint64_t nnz = idata[1];
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std::vector<uint64_t> indices(rank);
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for (uint64_t r = 0; r < rank; r++)
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indices[perm[r]] = idata[2 + r];
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SparseTensor *tensor = new SparseTensor(indices, nnz);
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// Read all nonzero elements.
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for (uint64_t k = 0; k < nnz; k++) {
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uint64_t idx = -1;
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for (uint64_t r = 0; r < rank; r++) {
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if (fscanf(file, "%" PRIu64, &idx) != 1) {
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fprintf(stderr, "Cannot find next index in %s\n", filename);
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exit(1);
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}
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// Add 0-based index.
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indices[perm[r]] = idx - 1;
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}
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double value;
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if (fscanf(file, "%lg\n", &value) != 1) {
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fprintf(stderr, "Cannot find next value in %s\n", filename);
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exit(1);
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}
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tensor->add(indices, value);
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}
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// Close the file and return sorted tensor.
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fclose(file);
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tensor->sort(); // sort lexicographically
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return tensor;
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}
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/// Templated reader.
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template <typename P, typename I, typename V>
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void *newSparseTensor(char *filename, uint8_t *sparsity, uint64_t *perm,
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uint64_t size) {
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SparseTensor *t = openTensor(filename, perm);
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assert(size == t->getRank()); // sparsity array must match rank
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SparseTensorStorageBase *tensor =
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new SparseTensorStorage<P, I, V>(t, sparsity);
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delete t;
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return tensor;
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}
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} // anonymous namespace
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extern "C" {
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/// Helper method to read a sparse tensor filename from the environment,
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/// defined with the naming convention ${TENSOR0}, ${TENSOR1}, etc.
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char *getTensorFilename(uint64_t id) {
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char var[80];
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sprintf(var, "TENSOR%" PRIu64, id);
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char *env = getenv(var);
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return env;
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}
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//===----------------------------------------------------------------------===//
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//
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// Public API of the sparse runtime support library that support an opaque
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// implementation of a bufferized SparseTensor in MLIR. This could be replaced
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// by actual codegen in MLIR.
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//
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// Because we cannot use C++ templates with C linkage, some macro magic is used
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// to generate implementations for all required type combinations that can be
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// called from MLIR generated code.
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//
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//===----------------------------------------------------------------------===//
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#define TEMPLATE(NAME, TYPE) \
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struct NAME { \
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const TYPE *base; \
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const TYPE *data; \
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uint64_t off; \
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uint64_t sizes[1]; \
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uint64_t strides[1]; \
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}
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#define CASE(p, i, v, P, I, V) \
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if (ptrTp == (p) && indTp == (i) && valTp == (v)) \
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return newSparseTensor<P, I, V>(filename, sparsity, perm, asize)
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#define IMPL1(RET, NAME, TYPE, LIB) \
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RET NAME(void *tensor) { \
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std::vector<TYPE> *v; \
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static_cast<SparseTensorStorageBase *>(tensor)->LIB(&v); \
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return {v->data(), v->data(), 0, {v->size()}, {1}}; \
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}
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#define IMPL2(RET, NAME, TYPE, LIB) \
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RET NAME(void *tensor, uint64_t d) { \
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std::vector<TYPE> *v; \
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static_cast<SparseTensorStorageBase *>(tensor)->LIB(&v, d); \
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return {v->data(), v->data(), 0, {v->size()}, {1}}; \
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}
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TEMPLATE(MemRef1DU64, uint64_t);
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TEMPLATE(MemRef1DU32, uint32_t);
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TEMPLATE(MemRef1DU16, uint16_t);
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TEMPLATE(MemRef1DU8, uint8_t);
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TEMPLATE(MemRef1DI64, int64_t);
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TEMPLATE(MemRef1DI32, int32_t);
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TEMPLATE(MemRef1DI16, int16_t);
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TEMPLATE(MemRef1DI8, int8_t);
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TEMPLATE(MemRef1DF64, double);
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TEMPLATE(MemRef1DF32, float);
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enum OverheadTypeEnum : uint64_t { kU64 = 1, kU32 = 2, kU16 = 3, kU8 = 4 };
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enum PrimaryTypeEnum : uint64_t {
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kF64 = 1,
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kF32 = 2,
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kI64 = 3,
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kI32 = 4,
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kI16 = 5,
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kI8 = 6
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};
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void *newSparseTensor(char *filename, uint8_t *abase, uint8_t *adata,
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uint64_t aoff, uint64_t asize, uint64_t astride,
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uint64_t *pbase, uint64_t *pdata, uint64_t poff,
|
|
uint64_t psize, uint64_t pstride, uint64_t ptrTp,
|
|
uint64_t indTp, uint64_t valTp) {
|
|
assert(astride == 1 && pstride == 1);
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|
uint8_t *sparsity = adata + aoff;
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|
uint64_t *perm = pdata + poff;
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|
|
|
// Double matrices with all combinations of overhead storage.
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CASE(kU64, kU64, kF64, uint64_t, uint64_t, double);
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CASE(kU64, kU32, kF64, uint64_t, uint32_t, double);
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|
CASE(kU64, kU16, kF64, uint64_t, uint16_t, double);
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|
CASE(kU64, kU8, kF64, uint64_t, uint8_t, double);
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|
CASE(kU32, kU64, kF64, uint32_t, uint64_t, double);
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|
CASE(kU32, kU32, kF64, uint32_t, uint32_t, double);
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|
CASE(kU32, kU16, kF64, uint32_t, uint16_t, double);
|
|
CASE(kU32, kU8, kF64, uint32_t, uint8_t, double);
|
|
CASE(kU16, kU64, kF64, uint16_t, uint64_t, double);
|
|
CASE(kU16, kU32, kF64, uint16_t, uint32_t, double);
|
|
CASE(kU16, kU16, kF64, uint16_t, uint16_t, double);
|
|
CASE(kU16, kU8, kF64, uint16_t, uint8_t, double);
|
|
CASE(kU8, kU64, kF64, uint8_t, uint64_t, double);
|
|
CASE(kU8, kU32, kF64, uint8_t, uint32_t, double);
|
|
CASE(kU8, kU16, kF64, uint8_t, uint16_t, double);
|
|
CASE(kU8, kU8, kF64, uint8_t, uint8_t, double);
|
|
|
|
// Float matrices with all combinations of overhead storage.
|
|
CASE(kU64, kU64, kF32, uint64_t, uint64_t, float);
|
|
CASE(kU64, kU32, kF32, uint64_t, uint32_t, float);
|
|
CASE(kU64, kU16, kF32, uint64_t, uint16_t, float);
|
|
CASE(kU64, kU8, kF32, uint64_t, uint8_t, float);
|
|
CASE(kU32, kU64, kF32, uint32_t, uint64_t, float);
|
|
CASE(kU32, kU32, kF32, uint32_t, uint32_t, float);
|
|
CASE(kU32, kU16, kF32, uint32_t, uint16_t, float);
|
|
CASE(kU32, kU8, kF32, uint32_t, uint8_t, float);
|
|
CASE(kU16, kU64, kF32, uint16_t, uint64_t, float);
|
|
CASE(kU16, kU32, kF32, uint16_t, uint32_t, float);
|
|
CASE(kU16, kU16, kF32, uint16_t, uint16_t, float);
|
|
CASE(kU16, kU8, kF32, uint16_t, uint8_t, float);
|
|
CASE(kU8, kU64, kF32, uint8_t, uint64_t, float);
|
|
CASE(kU8, kU32, kF32, uint8_t, uint32_t, float);
|
|
CASE(kU8, kU16, kF32, uint8_t, uint16_t, float);
|
|
CASE(kU8, kU8, kF32, uint8_t, uint8_t, float);
|
|
|
|
// Integral matrices with same overhead storage.
|
|
CASE(kU64, kU64, kI64, uint64_t, uint64_t, int64_t);
|
|
CASE(kU64, kU64, kI32, uint64_t, uint64_t, int32_t);
|
|
CASE(kU64, kU64, kI16, uint64_t, uint64_t, int16_t);
|
|
CASE(kU64, kU64, kI8, uint64_t, uint64_t, int8_t);
|
|
CASE(kU32, kU32, kI32, uint32_t, uint32_t, int32_t);
|
|
CASE(kU32, kU32, kI16, uint32_t, uint32_t, int16_t);
|
|
CASE(kU32, kU32, kI8, uint32_t, uint32_t, int8_t);
|
|
CASE(kU16, kU16, kI32, uint16_t, uint16_t, int32_t);
|
|
CASE(kU16, kU16, kI16, uint16_t, uint16_t, int16_t);
|
|
CASE(kU16, kU16, kI8, uint16_t, uint16_t, int8_t);
|
|
CASE(kU8, kU8, kI32, uint8_t, uint8_t, int32_t);
|
|
CASE(kU8, kU8, kI16, uint8_t, uint8_t, int16_t);
|
|
CASE(kU8, kU8, kI8, uint8_t, uint8_t, int8_t);
|
|
|
|
// Unsupported case (add above if needed).
|
|
fputs("unsupported combination of types\n", stderr);
|
|
exit(1);
|
|
}
|
|
|
|
#undef CASE
|
|
|
|
uint64_t sparseDimSize(void *tensor, uint64_t d) {
|
|
return static_cast<SparseTensorStorageBase *>(tensor)->getDimSize(d);
|
|
}
|
|
|
|
IMPL2(MemRef1DU64, sparsePointers, uint64_t, getPointers)
|
|
IMPL2(MemRef1DU64, sparsePointers64, uint64_t, getPointers)
|
|
IMPL2(MemRef1DU32, sparsePointers32, uint32_t, getPointers)
|
|
IMPL2(MemRef1DU16, sparsePointers16, uint16_t, getPointers)
|
|
IMPL2(MemRef1DU8, sparsePointers8, uint8_t, getPointers)
|
|
IMPL2(MemRef1DU64, sparseIndices, uint64_t, getIndices)
|
|
IMPL2(MemRef1DU64, sparseIndices64, uint64_t, getIndices)
|
|
IMPL2(MemRef1DU32, sparseIndices32, uint32_t, getIndices)
|
|
IMPL2(MemRef1DU16, sparseIndices16, uint16_t, getIndices)
|
|
IMPL2(MemRef1DU8, sparseIndices8, uint8_t, getIndices)
|
|
IMPL1(MemRef1DF64, sparseValuesF64, double, getValues)
|
|
IMPL1(MemRef1DF32, sparseValuesF32, float, getValues)
|
|
IMPL1(MemRef1DI64, sparseValuesI64, int64_t, getValues)
|
|
IMPL1(MemRef1DI32, sparseValuesI32, int32_t, getValues)
|
|
IMPL1(MemRef1DI16, sparseValuesI16, int16_t, getValues)
|
|
IMPL1(MemRef1DI8, sparseValuesI8, int8_t, getValues)
|
|
|
|
void delSparseTensor(void *tensor) {
|
|
delete static_cast<SparseTensorStorageBase *>(tensor);
|
|
}
|
|
|
|
#undef TEMPLATE
|
|
#undef CASE
|
|
#undef IMPL1
|
|
#undef IMPL2
|
|
|
|
} // extern "C"
|
|
|
|
#endif // MLIR_CRUNNERUTILS_DEFINE_FUNCTIONS
|