Adding a naive implementation of various primitive tensor operations

src/libraries/System.Numerics.Tensors/README.md

@@ -1,2 +1,3 @@
 # System.Numerics.Tensors
-This library has not been shipped publicly and is not accepting contributions at this time.
+
+Provides APIs for performing primitive operations over tensors represented by spans of memory.

src/libraries/System.Numerics.Tensors/ref/System.Numerics.Tensors.cs

@@ -6,151 +6,27 @@
 
 namespace System.Numerics.Tensors
 {
-    public static partial class ArrayTensorExtensions
+    public static class TensorPrimitives
     {
-        public static System.Numerics.Tensors.CompressedSparseTensor<T> ToCompressedSparseTensor<T>(this System.Array array, bool reverseStride = false) { throw null; }
-        public static System.Numerics.Tensors.CompressedSparseTensor<T> ToCompressedSparseTensor<T>(this T[,,] array, bool reverseStride = false) { throw null; }
-        public static System.Numerics.Tensors.CompressedSparseTensor<T> ToCompressedSparseTensor<T>(this T[,] array, bool reverseStride = false) { throw null; }
-        public static System.Numerics.Tensors.CompressedSparseTensor<T> ToCompressedSparseTensor<T>(this T[] array) { throw null; }
-        public static System.Numerics.Tensors.SparseTensor<T> ToSparseTensor<T>(this System.Array array, bool reverseStride = false) { throw null; }
-        public static System.Numerics.Tensors.SparseTensor<T> ToSparseTensor<T>(this T[,,] array, bool reverseStride = false) { throw null; }
-        public static System.Numerics.Tensors.SparseTensor<T> ToSparseTensor<T>(this T[,] array, bool reverseStride = false) { throw null; }
-        public static System.Numerics.Tensors.SparseTensor<T> ToSparseTensor<T>(this T[] array) { throw null; }
-        public static System.Numerics.Tensors.DenseTensor<T> ToTensor<T>(this System.Array array, bool reverseStride = false) { throw null; }
-        public static System.Numerics.Tensors.DenseTensor<T> ToTensor<T>(this T[,,] array, bool reverseStride = false) { throw null; }
-        public static System.Numerics.Tensors.DenseTensor<T> ToTensor<T>(this T[,] array, bool reverseStride = false) { throw null; }
-        public static System.Numerics.Tensors.DenseTensor<T> ToTensor<T>(this T[] array) { throw null; }
-    }
-    public partial class CompressedSparseTensor<T> : System.Numerics.Tensors.Tensor<T>
-    {
-        public CompressedSparseTensor(System.Memory<T> values, System.Memory<int> compressedCounts, System.Memory<int> indices, int nonZeroCount, System.ReadOnlySpan<int> dimensions, bool reverseStride = false) : base (default(System.Array), default(bool)) { }
-        public CompressedSparseTensor(System.ReadOnlySpan<int> dimensions, bool reverseStride = false) : base (default(System.Array), default(bool)) { }
-        public CompressedSparseTensor(System.ReadOnlySpan<int> dimensions, int capacity, bool reverseStride = false) : base (default(System.Array), default(bool)) { }
-        public int Capacity { get { throw null; } }
-        public System.Memory<int> CompressedCounts { get { throw null; } }
-        public System.Memory<int> Indices { get { throw null; } }
-        public override T this[System.ReadOnlySpan<int> indices] { get { throw null; } set { } }
-        public int NonZeroCount { get { throw null; } }
-        public System.Memory<T> Values { get { throw null; } }
-        public override System.Numerics.Tensors.Tensor<T> Clone() { throw null; }
-        public override System.Numerics.Tensors.Tensor<TResult> CloneEmpty<TResult>(System.ReadOnlySpan<int> dimensions) { throw null; }
-        public override T GetValue(int index) { throw null; }
-        public override System.Numerics.Tensors.Tensor<T> Reshape(System.ReadOnlySpan<int> dimensions) { throw null; }
-        public override void SetValue(int index, T value) { }
-        public override System.Numerics.Tensors.CompressedSparseTensor<T> ToCompressedSparseTensor() { throw null; }
-        public override System.Numerics.Tensors.DenseTensor<T> ToDenseTensor() { throw null; }
-        public override System.Numerics.Tensors.SparseTensor<T> ToSparseTensor() { throw null; }
-    }
-    public partial class DenseTensor<T> : System.Numerics.Tensors.Tensor<T>
-    {
-        public DenseTensor(int length) : base (default(System.Array), default(bool)) { }
-        public DenseTensor(System.Memory<T> memory, System.ReadOnlySpan<int> dimensions, bool reverseStride = false) : base (default(System.Array), default(bool)) { }
-        public DenseTensor(System.ReadOnlySpan<int> dimensions, bool reverseStride = false) : base (default(System.Array), default(bool)) { }
-        public System.Memory<T> Buffer { get { throw null; } }
-        public override System.Numerics.Tensors.Tensor<T> Clone() { throw null; }
-        public override System.Numerics.Tensors.Tensor<TResult> CloneEmpty<TResult>(System.ReadOnlySpan<int> dimensions) { throw null; }
-        protected override void CopyTo(T[] array, int arrayIndex) { }
-        public override T GetValue(int index) { throw null; }
-        protected override int IndexOf(T item) { throw null; }
-        public override System.Numerics.Tensors.Tensor<T> Reshape(System.ReadOnlySpan<int> dimensions) { throw null; }
-        public override void SetValue(int index, T value) { }
-    }
-    public partial class SparseTensor<T> : System.Numerics.Tensors.Tensor<T>
-    {
-        public SparseTensor(System.ReadOnlySpan<int> dimensions, bool reverseStride = false, int capacity = 0) : base (default(System.Array), default(bool)) { }
-        public int NonZeroCount { get { throw null; } }
-        public override System.Numerics.Tensors.Tensor<T> Clone() { throw null; }
-        public override System.Numerics.Tensors.Tensor<TResult> CloneEmpty<TResult>(System.ReadOnlySpan<int> dimensions) { throw null; }
-        public override T GetValue(int index) { throw null; }
-        public override System.Numerics.Tensors.Tensor<T> Reshape(System.ReadOnlySpan<int> dimensions) { throw null; }
-        public override void SetValue(int index, T value) { }
-        public override System.Numerics.Tensors.CompressedSparseTensor<T> ToCompressedSparseTensor() { throw null; }
-        public override System.Numerics.Tensors.DenseTensor<T> ToDenseTensor() { throw null; }
-        public override System.Numerics.Tensors.SparseTensor<T> ToSparseTensor() { throw null; }
-    }
-    public static partial class Tensor
-    {
-        public static System.Numerics.Tensors.Tensor<T> CreateFromDiagonal<T>(System.Numerics.Tensors.Tensor<T> diagonal) { throw null; }
-        public static System.Numerics.Tensors.Tensor<T> CreateFromDiagonal<T>(System.Numerics.Tensors.Tensor<T> diagonal, int offset) { throw null; }
-        public static System.Numerics.Tensors.Tensor<T> CreateIdentity<T>(int size) { throw null; }
-        public static System.Numerics.Tensors.Tensor<T> CreateIdentity<T>(int size, bool columMajor) { throw null; }
-        public static System.Numerics.Tensors.Tensor<T> CreateIdentity<T>(int size, bool columMajor, T oneValue) { throw null; }
-    }
-    public abstract partial class Tensor<T> : System.Collections.Generic.ICollection<T>, System.Collections.Generic.IEnumerable<T>, System.Collections.Generic.IList<T>, System.Collections.Generic.IReadOnlyCollection<T>, System.Collections.Generic.IReadOnlyList<T>, System.Collections.ICollection, System.Collections.IEnumerable, System.Collections.IList, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable
-    {
-        protected Tensor(System.Array fromArray, bool reverseStride) { }
-        protected Tensor(int length) { }
-        protected Tensor(System.ReadOnlySpan<int> dimensions, bool reverseStride) { }
-        public System.ReadOnlySpan<int> Dimensions { get { throw null; } }
-        public bool IsFixedSize { get { throw null; } }
-        public bool IsReadOnly { get { throw null; } }
-        public bool IsReversedStride { get { throw null; } }
-        public virtual T this[params int[] indices] { get { throw null; } set { } }
-        public virtual T this[System.ReadOnlySpan<int> indices] { get { throw null; } set { } }
-        public long Length { get { throw null; } }
-        public int Rank { get { throw null; } }
-        public System.ReadOnlySpan<int> Strides { get { throw null; } }
-        int System.Collections.Generic.ICollection<T>.Count { get { throw null; } }
-        T System.Collections.Generic.IList<T>.this[int index] { get { throw null; } set { } }
-        int System.Collections.Generic.IReadOnlyCollection<T>.Count { get { throw null; } }
-        T System.Collections.Generic.IReadOnlyList<T>.this[int index] { get { throw null; } }
-        int System.Collections.ICollection.Count { get { throw null; } }
-        bool System.Collections.ICollection.IsSynchronized { get { throw null; } }
-        object System.Collections.ICollection.SyncRoot { get { throw null; } }
-        object? System.Collections.IList.this[int index] { get { throw null; } set { } }
-        public abstract System.Numerics.Tensors.Tensor<T> Clone();
-        public virtual System.Numerics.Tensors.Tensor<T> CloneEmpty() { throw null; }
-        public virtual System.Numerics.Tensors.Tensor<T> CloneEmpty(System.ReadOnlySpan<int> dimensions) { throw null; }
-        public virtual System.Numerics.Tensors.Tensor<TResult> CloneEmpty<TResult>() { throw null; }
-        public abstract System.Numerics.Tensors.Tensor<TResult> CloneEmpty<TResult>(System.ReadOnlySpan<int> dimensions);
-        public static int Compare(System.Numerics.Tensors.Tensor<T> left, System.Numerics.Tensors.Tensor<T> right) { throw null; }
-        protected virtual bool Contains(T item) { throw null; }
-        protected virtual void CopyTo(T[] array, int arrayIndex) { }
-        public static bool Equals(System.Numerics.Tensors.Tensor<T> left, System.Numerics.Tensors.Tensor<T> right) { throw null; }
-        public virtual void Fill(T value) { }
-        public string GetArrayString(bool includeWhitespace = true) { throw null; }
-        public System.Numerics.Tensors.Tensor<T> GetDiagonal() { throw null; }
-        public System.Numerics.Tensors.Tensor<T> GetDiagonal(int offset) { throw null; }
-        public System.Numerics.Tensors.Tensor<T> GetTriangle() { throw null; }
-        public System.Numerics.Tensors.Tensor<T> GetTriangle(int offset) { throw null; }
-        public System.Numerics.Tensors.Tensor<T> GetUpperTriangle() { throw null; }
-        public System.Numerics.Tensors.Tensor<T> GetUpperTriangle(int offset) { throw null; }
-        public abstract T GetValue(int index);
-        protected virtual int IndexOf(T item) { throw null; }
-        public abstract System.Numerics.Tensors.Tensor<T> Reshape(System.ReadOnlySpan<int> dimensions);
-        public abstract void SetValue(int index, T value);
-        public struct Enumerator : System.Collections.Generic.IEnumerator<T>
-        {
-            public T Current { get; private set; }
-            object? System.Collections.IEnumerator.Current => throw null;
-            public bool MoveNext() => throw null;
-            public void Reset() { }
-            public void Dispose() { }
-        }
-        public Enumerator GetEnumerator() => throw null;
-        void System.Collections.Generic.ICollection<T>.Add(T item) { }
-        void System.Collections.Generic.ICollection<T>.Clear() { }
-        bool System.Collections.Generic.ICollection<T>.Contains(T item) { throw null; }
-        void System.Collections.Generic.ICollection<T>.CopyTo(T[] array, int arrayIndex) { }
-        bool System.Collections.Generic.ICollection<T>.Remove(T item) { throw null; }
-        System.Collections.Generic.IEnumerator<T> System.Collections.Generic.IEnumerable<T>.GetEnumerator() { throw null; }
-        int System.Collections.Generic.IList<T>.IndexOf(T item) { throw null; }
-        void System.Collections.Generic.IList<T>.Insert(int index, T item) { }
-        void System.Collections.Generic.IList<T>.RemoveAt(int index) { }
-        void System.Collections.ICollection.CopyTo(System.Array array, int index) { }
-        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
-        int System.Collections.IList.Add(object? value) { throw null; }
-        void System.Collections.IList.Clear() { }
-        bool System.Collections.IList.Contains(object? value) { throw null; }
-        int System.Collections.IList.IndexOf(object? value) { throw null; }
-        void System.Collections.IList.Insert(int index, object? value) { }
-        void System.Collections.IList.Remove(object? value) { }
-        void System.Collections.IList.RemoveAt(int index) { }
-        int System.Collections.IStructuralComparable.CompareTo(object? other, System.Collections.IComparer comparer) { throw null; }
-        bool System.Collections.IStructuralEquatable.Equals(object? other, System.Collections.IEqualityComparer comparer) { throw null; }
-        int System.Collections.IStructuralEquatable.GetHashCode(System.Collections.IEqualityComparer comparer) { throw null; }
-        public virtual System.Numerics.Tensors.CompressedSparseTensor<T> ToCompressedSparseTensor() { throw null; }
-        public virtual System.Numerics.Tensors.DenseTensor<T> ToDenseTensor() { throw null; }
-        public virtual System.Numerics.Tensors.SparseTensor<T> ToSparseTensor() { throw null; }
+        public static void Add(System.ReadOnlySpan<float> x, float y, System.Span<float> destination) { throw null; }
+        public static void Add(System.ReadOnlySpan<float> x, System.ReadOnlySpan<float> y, System.Span<float> destination) { throw null; }
+        public static void AddMultiply(System.ReadOnlySpan<float> x, float y, System.ReadOnlySpan<float> multiplier, System.Span<float> destination) { throw null; }
+        public static void AddMultiply(System.ReadOnlySpan<float> x, System.ReadOnlySpan<float> y, float multiplier, System.Span<float> destination) { throw null; }
+        public static void AddMultiply(System.ReadOnlySpan<float> x, System.ReadOnlySpan<float> y, System.ReadOnlySpan<float> multiplier, System.Span<float> destination) { throw null; }
+        public static void Cosh(System.ReadOnlySpan<float> x, System.Span<float> destination) { throw null; }
+        public static void Divide(System.ReadOnlySpan<float> x, float y, System.Span<float> destination) { throw null; }
+        public static void Divide(System.ReadOnlySpan<float> x, System.ReadOnlySpan<float> y, System.Span<float> destination) { throw null; }
+        public static void Exp(System.ReadOnlySpan<float> x, System.Span<float> destination) { throw null; }
+        public static void Log(System.ReadOnlySpan<float> x, System.Span<float> destination) { throw null; }
+        public static void Multiply(System.ReadOnlySpan<float> x, float y, System.Span<float> destination) { throw null; }
+        public static void Multiply(System.ReadOnlySpan<float> x, System.ReadOnlySpan<float> y, System.Span<float> destination) { throw null; }
+        public static void MultiplyAdd(System.ReadOnlySpan<float> x, float y, System.ReadOnlySpan<float> addend, System.Span<float> destination) { throw null; }
+        public static void MultiplyAdd(System.ReadOnlySpan<float> x, System.ReadOnlySpan<float> y, float addend, System.Span<float> destination) { throw null; }
+        public static void MultiplyAdd(System.ReadOnlySpan<float> x, System.ReadOnlySpan<float> y, System.ReadOnlySpan<float> addend, System.Span<float> destination) { throw null; }
+        public static void Negate(System.ReadOnlySpan<float> x, System.Span<float> destination) { throw null; }
+        public static void Subtract(System.ReadOnlySpan<float> x, float y, System.Span<float> destination) { throw null; }
+        public static void Subtract(System.ReadOnlySpan<float> x, System.ReadOnlySpan<float> y, System.Span<float> destination) { throw null; }
+        public static void Sinh(System.ReadOnlySpan<float> x, System.Span<float> destination) { throw null; }
+        public static void Tanh(System.ReadOnlySpan<float> x, System.Span<float> destination) { throw null; }
     }
 }

src/libraries/System.Numerics.Tensors/ref/System.Numerics.Tensors.csproj

@@ -1,4 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppPrevious);$(NetCoreAppMinimum);netstandard2.0;$(NetFrameworkMinimum)</TargetFrameworks>
   </PropertyGroup>
@@ -10,4 +11,5 @@
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' != '.NETCoreApp'">
     <PackageReference Include="System.Memory" Version="$(SystemMemoryVersion)" />
   </ItemGroup>
+
 </Project>

src/libraries/System.Numerics.Tensors/src/Resources/Strings.resx

@@ -117,52 +117,10 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
-  <data name="ArrayMustContainElements" xml:space="preserve">
-    <value>Array must contain elements.</value>
+  <data name="Argument_DestinationTooShort" xml:space="preserve">
+    <value>Destination is too short.</value>
   </data>
-  <data name="CannotCompare" xml:space="preserve">
-    <value>Cannot compare {0} to {1}.</value>
-  </data>
-  <data name="CannotCompareToWithDifferentDimension" xml:space="preserve">
-    <value>Cannot compare {0} to {1} with different dimension {2}, {3} != {4}.</value>
-  </data>
-  <data name="CannotCompareWithDifferentDimension" xml:space="preserve">
-    <value>Cannot compare {0} with different dimension {1}, {2} != {3}.</value>
-  </data>
-  <data name="CannotCompareWithRank" xml:space="preserve">
-    <value>Cannot compare {0} with Rank {1} to {2} with Rank {3}.</value>
-  </data>
-  <data name="CannotComputeDiagonal" xml:space="preserve">
-    <value>Cannot compute diagonal of {0} with Rank less than 2.</value>
-  </data>
-  <data name="CannotComputeDiagonalWithOffset" xml:space="preserve">
-    <value>Cannot compute diagonal with offset {0}.</value>
-  </data>
-  <data name="MustHaveAtLeastOneDimension" xml:space="preserve">
-    <value>Tensor {0} must have at least one dimension.</value>
-  </data>
-  <data name="CannotComputeTriangle" xml:space="preserve">
-    <value>Cannot compute triangle of {0} with Rank less than 2.</value>
-  </data>
-  <data name="CannotReshapeArrayDueToMismatchInLengths" xml:space="preserve">
-    <value>Cannot reshape array due to mismatch in lengths, currently {0} would become {1}.</value>
-  </data>
-  <data name="DimensionsMustBePositiveAndNonZero" xml:space="preserve">
-    <value>Dimensions must be positive and non-zero.</value>
-  </data>
-  <data name="DimensionsMustContainElements" xml:space="preserve">
-    <value>Dimensions must contain elements.</value>
-  </data>
-  <data name="LengthMustMatch" xml:space="preserve">
-    <value>Length of {0} ({1}) must match product of {2} ({3}).</value>
-  </data>
-  <data name="NumberGreaterThenAvailableSpace" xml:space="preserve">
-    <value>The number of elements in the Tensor is greater than the available space from index to the end of the destination array.</value>
-  </data>
-  <data name="OnlySingleDimensionalArraysSupported" xml:space="preserve">
-    <value>Only single dimensional arrays are supported for the requested action.</value>
-  </data>
-  <data name="ValueIsNotOfType" xml:space="preserve">
-    <value>The value "{0}" is not of type "{1}" and cannot be used in this generic collection.</value>
+  <data name="Argument_SpansMustHaveSameLength" xml:space="preserve">
+    <value>Length of '{0}' must be same as length of '{1}'.</value>
   </data>
 </root>