/**
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* @license
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* Copyright 2020 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 {KernelConfig, StridedSlice, StridedSliceAttrs, StridedSliceInputs, tensor1d, tidy} from '@tensorflow/tfjs';
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import {createTensorsTypeOpAttr, NodeJSKernelBackend} from '../nodejs_kernel_backend';
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export const stridedSliceConfig: KernelConfig = {
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kernelName: StridedSlice,
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backendName: 'tensorflow',
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kernelFunc: (args) => {
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const {x} = args.inputs as StridedSliceInputs;
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const backend = args.backend as NodeJSKernelBackend;
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const {beginMask, endMask, ellipsisMask, newAxisMask, shrinkAxisMask} =
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args.attrs as unknown as StridedSliceAttrs;
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const attrs = args.attrs as unknown as StridedSliceAttrs;
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// make a copy because it may be modified in-place further down.
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const begin = attrs.begin.slice();
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const end = attrs.end.slice();
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const strides = attrs.strides;
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return tidy(() => {
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const beginTensor = tensor1d(begin, 'int32');
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const endTensor = tensor1d(end, 'int32');
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const stridesTensor = tensor1d(strides, 'int32');
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const opAttrs = [
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createTensorsTypeOpAttr('T', x.dtype),
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createTensorsTypeOpAttr('Index', 'int32'), {
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name: 'begin_mask',
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type: backend.binding.TF_ATTR_INT,
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value: beginMask
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},
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{name: 'end_mask', type: backend.binding.TF_ATTR_INT, value: endMask}, {
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name: 'ellipsis_mask',
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type: backend.binding.TF_ATTR_INT,
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value: ellipsisMask
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},
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{
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name: 'new_axis_mask',
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type: backend.binding.TF_ATTR_INT,
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value: newAxisMask
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},
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{
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name: 'shrink_axis_mask',
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type: backend.binding.TF_ATTR_INT,
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value: shrinkAxisMask
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}
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];
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return backend.executeSingleOutput(
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StridedSlice, opAttrs, [x, beginTensor, endTensor, stridesTensor]);
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});
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}
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};
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