114 lines
5.8 KiB
C++
114 lines
5.8 KiB
C++
/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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//
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// created by Yurii Shyrma on 15.02.2018
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//
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#include <system/op_boilerplate.h>
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#if NOT_EXCLUDED(OP_gru)
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#include <ops/declarable/CustomOperations.h>
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#include<ops/declarable/helpers/gru.h>
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namespace sd {
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namespace ops {
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//////////////////////////////////////////////////////////////////////////
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CUSTOM_OP_IMPL(gru, 5, 1, false, 0, 0) {
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auto x = INPUT_VARIABLE(0); // input [time x bS x iS]
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auto h0 = INPUT_VARIABLE(1); // initial cell output (at time step = 0) [bS x nU]
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auto Wx = INPUT_VARIABLE(2); // input-to-hidden weights, [iS x 3*nU]
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auto Wh = INPUT_VARIABLE(3); // hidden-to-hidden weights, [nU x 3*nU]
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auto b = INPUT_VARIABLE(4); // biases, [3*nU]
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auto h = OUTPUT_VARIABLE(0); // cell outputs [time x bS x nU], that is per each time step
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const int rank = x->rankOf(); // = 3
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const int time = x->sizeAt(0);
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const int bS = x->sizeAt(1);
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const int iS = x->sizeAt(2);
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const int nU = h0->sizeAt(1);
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const std::vector<Nd4jLong> h0CorrectShape = {bS, nU};
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const std::vector<Nd4jLong> wxCorrectShape = {iS, 3*nU};
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const std::vector<Nd4jLong> whCorrectShape = {nU, 3*nU};
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const std::vector<Nd4jLong> bCorrectShape = {3*nU};
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REQUIRE_TRUE(h0->isSameShape(h0CorrectShape), 0, "GRU operation: wrong shape of previous cell output array, expected is %s, but got %s instead !", ShapeUtils::shapeAsString(h0CorrectShape).c_str(), ShapeUtils::shapeAsString(h0).c_str());
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REQUIRE_TRUE(Wx->isSameShape(wxCorrectShape), 0, "GRU operation: wrong shape of input-to-hidden weights array, expected is %s, but got %s instead !", ShapeUtils::shapeAsString(wxCorrectShape).c_str(), ShapeUtils::shapeAsString(Wx).c_str());
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REQUIRE_TRUE(Wh->isSameShape(whCorrectShape), 0, "GRU operation: wrong shape of hidden-to-hidden weights array, expected is %s, but got %s instead !", ShapeUtils::shapeAsString(whCorrectShape).c_str(), ShapeUtils::shapeAsString(Wh).c_str());
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REQUIRE_TRUE(b->isSameShape(bCorrectShape), 0, "GRU operation: wrong shape of biases array, expected is %s, but got %s instead !", ShapeUtils::shapeAsString(bCorrectShape).c_str(), ShapeUtils::shapeAsString(b).c_str());
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helpers::gruTimeLoop(block.launchContext(), x, h0, Wx, Wh, b, h);
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return Status::OK();
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}
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DECLARE_TYPES(gru) {
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getOpDescriptor()
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->setAllowedInputTypes(sd::DataType::ANY)
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->setAllowedOutputTypes({ALL_FLOATS});
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}
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DECLARE_SHAPE_FN(gru) {
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const auto xShapeInfo = inputShape->at(0); // input [time x bS x inSize]
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const auto h0ShapeInfo = inputShape->at(1); // initial cell output [bS x numUnits], that is at time step t=0
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const auto WxShapeInfo = inputShape->at(2); // input-to-hidden weights, [inSize x 3*numUnits]
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const auto WhShapeInfo = inputShape->at(3); // hidden-to-hidden weights, [numUnits x 3*numUnits]
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const auto bShapeInfo = inputShape->at(4); // biases, [3*numUnits]
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const int rank = shape::rank(xShapeInfo); // = 3
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const auto time = xShapeInfo[1];
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const auto bS = xShapeInfo[2];
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const auto inSize = xShapeInfo[3];
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const auto numUnits = h0ShapeInfo[2];
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const std::vector<Nd4jLong> h0CorrectShape = {bS, numUnits};
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const std::vector<Nd4jLong> wxCorrectShape = {inSize, 3*numUnits};
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const std::vector<Nd4jLong> whCorrectShape = {numUnits, 3*numUnits};
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const std::vector<Nd4jLong> bCorrectShape = {3*numUnits};
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REQUIRE_TRUE(ShapeUtils::areShapesEqual(h0ShapeInfo, h0CorrectShape), 0, "GRU operation: wrong shape of previous cell output array, expected is %s, but got %s instead !", ShapeUtils::shapeAsString(h0CorrectShape).c_str(), ShapeUtils::shapeAsString(h0ShapeInfo).c_str());
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REQUIRE_TRUE(ShapeUtils::areShapesEqual(WxShapeInfo, wxCorrectShape), 0, "GRU operation: wrong shape of input-to-hidden weights array, expected is %s, but got %s instead !", ShapeUtils::shapeAsString(wxCorrectShape).c_str(), ShapeUtils::shapeAsString(WxShapeInfo).c_str());
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REQUIRE_TRUE(ShapeUtils::areShapesEqual(WhShapeInfo, whCorrectShape), 0, "GRU operation: wrong shape of hidden-to-hidden weights array, expected is %s, but got %s instead !", ShapeUtils::shapeAsString(whCorrectShape).c_str(), ShapeUtils::shapeAsString(WhShapeInfo).c_str());
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REQUIRE_TRUE(ShapeUtils::areShapesEqual(bShapeInfo, bCorrectShape), 0, "GRU operation: wrong shape of biases array, expected is %s, but got %s instead !", ShapeUtils::shapeAsString(bCorrectShape).c_str(), ShapeUtils::shapeAsString(bShapeInfo).c_str());
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// evaluate output shapeInfo
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Nd4jLong *hShapeInfo(nullptr);
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ALLOCATE(hShapeInfo, block.getWorkspace(), shape::shapeInfoLength(rank), Nd4jLong);
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hShapeInfo[0] = rank;
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hShapeInfo[1] = time;
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hShapeInfo[2] = bS;
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hShapeInfo[3] = numUnits;
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ShapeUtils::updateStridesAndType(hShapeInfo, xShapeInfo, shape::order(h0ShapeInfo));
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return SHAPELIST(hShapeInfo);
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}
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}
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}
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#endif |