/**
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* @license
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* Copyright 2019 Google LLC. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* =============================================================================
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*/
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import { Tensor } from './tensor';
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import { DataType, RecursiveArray } from './types';
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export declare type DataId = object;
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declare type AttributeValue = number | number[] | boolean | boolean[] | string | string[] | NamedAttrMap;
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/** These are extra non-tensor/primitive params passed to kernel functions. */
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export declare type Attribute = AttributeValue | RecursiveArray<AttributeValue>;
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/** Specifies the code to run when executing a kernel. */
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export declare type KernelFunc = (params: {
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inputs: NamedTensorInfoMap;
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backend: {};
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attrs?: NamedAttrMap;
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}) => TensorInfo | TensorInfo[];
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/** The function to run when computing a gradient during backprop. */
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export declare type GradFunc = (dy: Tensor | Tensor[], saved: Tensor[]) => ({
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[inputName: string]: () => Tensor;
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});
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/** Function that gets called after the backend initializes. */
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export declare type KernelSetupFunc = (backend: {}) => void;
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/** Function that gets called right before the backend is disposed. */
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export declare type KernelDisposeFunc = KernelSetupFunc;
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/** Config object for registering a kernel in the global registry. */
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export interface KernelConfig {
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kernelName: string;
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backendName: string;
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kernelFunc: KernelFunc;
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setupFunc?: KernelSetupFunc;
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disposeFunc?: KernelDisposeFunc;
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}
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/** Config object for registering a gradient in the global registry. */
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export interface GradConfig {
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kernelName: string;
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gradFunc: GradFunc;
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}
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/** Holds metadata for a given tensor. */
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export interface TensorInfo {
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dataId: DataId;
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shape: number[];
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dtype: DataType;
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}
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export interface NamedTensorInfoMap {
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[name: string]: TensorInfo;
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}
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export interface NamedAttrMap {
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[name: string]: Attribute;
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}
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/**
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* Returns the kernel function (code) associated with the provided names.
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*
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* @param kernelName The official name of the kernel.
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* @param backendName The official name of the backend.
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*/
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export declare function getKernel(kernelName: string, backendName: string): KernelConfig;
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/**
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* Returns the registered gradient info associated with the provided kernel.
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* @param kernelName The official TF kernel name.
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*/
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export declare function getGradient(kernelName: string): GradConfig;
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export declare function getKernelsForBackend(backendName: string): KernelConfig[];
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/**
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* Registers the function (forward pass) for the kernel in a global registry.
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*
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* @param config A config object with the following properties:
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* - `kernelName` The official name of the kernel.
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* - `backendName` The official name of the backend.
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* - `kernelFunc` The function to run during the forward pass of the kernel.
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* - `setupFunc` Optional. Gets called once, after the backend initializes.
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* - `disposeFunc` Optional. Gets called once, right before the backend is
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* disposed.
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*/
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export declare function registerKernel(config: KernelConfig): void;
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/**
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* Registers a gradient function for a given kernel in the global registry,
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* to be used during the back-propagation of that kernel.
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*
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* @param config An object with the following properties:
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* - `kernelName` The name of the kernel that the gradient function is for.
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* - `gradFunc` The function to run during back-propagation.
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*/
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export declare function registerGradient(config: GradConfig): void;
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/**
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* Removes the kernel function from the registry.
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*
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* @param kernelName The official name of the kernel.
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* @param backendName The official name of the backend.
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*
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*/
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export declare function unregisterKernel(kernelName: string, backendName: string): void;
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/** Removes the registered gradient from the global registry. */
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export declare function unregisterGradient(kernelName: string): void;
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export {};
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