125 lines
5.8 KiB
C++
125 lines
5.8 KiB
C++
/*******************************************************************************
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* Copyright (c) 2015-2019 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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// lstmBlock: Full LSTM layer in one op
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// @author Alex Black
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//
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#include <op_boilerplate.h>
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#if NOT_EXCLUDED(OP_lstmBlock)
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#include <ops/declarable/CustomOperations.h>
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#include<ops/declarable/helpers/lstmBlock.h>
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namespace nd4j {
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namespace ops {
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//////////////////////////////////////////////////////////////////////////
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CUSTOM_OP_IMPL(lstmBlock, 9, 7, false, 2, 2) {
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auto maxTSLength = INPUT_VARIABLE(0);
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auto x = INPUT_VARIABLE(1); // input [seqLen, bS, inSize] at time t
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auto cLast = INPUT_VARIABLE(2); // previous cell state [bS, numUnits], time t-1
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auto yLast = INPUT_VARIABLE(3); // previous output [bS, numUnits], time t-1
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auto W = INPUT_VARIABLE(4); // Weights - concatenated (input-to-hidden, hidden-to-hidden weights) weights, [(inSize+numUnits), 4*numUnits]
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auto Wci = INPUT_VARIABLE(5); // weights - cell peephole (t-1) connections to input modulation gate, [numUnits]
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auto Wcf = INPUT_VARIABLE(6); // weights - cell peephole (t-1) connections to forget gate, [numUnits]
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auto Wco = INPUT_VARIABLE(7); // weights - cell peephole (t) connections to output gate, [numUnits]
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auto b = INPUT_VARIABLE(8); // biases, [4*numUnits]
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auto i = OUTPUT_VARIABLE(0); // Output - input modulation gate activations [seqLen, bS, numUnits]
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auto c = OUTPUT_VARIABLE(1); // Activations, cell state (pre tanh) [seqLen, bs, numUnits]
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auto f = OUTPUT_VARIABLE(2); // Output - forget gate activations [seqLen, bs, numUnits]
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auto o = OUTPUT_VARIABLE(3); // Output - output gate activations [seqLen, bs, numUnits]
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auto z = OUTPUT_VARIABLE(4); // Output - input gate activations [seqLen, bs, numUnits]
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auto h = OUTPUT_VARIABLE(5); // Cell state, post tanh [seqLen, bs, numUnits]
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auto y = OUTPUT_VARIABLE(6); // current cell output [seqLen, bS, numProj], time t
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const int peephole = INT_ARG(0); // if 1, provide peephole connections
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const int dataFormat = INT_ARG(1); // 0=TNS=[seqLen,mb,size]; 1=NST=[mb,size,seqLen]; 2=NTS=[mb,seqLen,size]
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const double forgetBias = T_ARG(0);
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const double clippingCellValue = T_ARG(1); // clipping value for ct, if it is not equal to zero, then cell state is clipped
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REQUIRE_TRUE(x->rankOf()==3, 0, "lstmBlock: Input array 1 (x) rank must be got input with rank %i", x->rankOf());
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REQUIRE_TRUE(cLast->rankOf()==2 && yLast->rankOf()==2, 0, "lstmBlock: Input ranks must be 2 for inputs 2/3 (cLast, yLast) - got %i, %i", cLast->rankOf(), yLast->rankOf());
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REQUIRE_TRUE(W->rankOf()==2, 0, "lstmBlock: Weights array rank must be 2");
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REQUIRE_TRUE(b->rankOf()==1, 0, "lstmBlock: Biases must be rank 1");
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REQUIRE_TRUE(i->rankOf()==3 && c->rankOf()==3 && f->rankOf()==3 && o->rankOf()==3 && z->rankOf()==3 && h->rankOf()==3 && y->rankOf()==3,
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0, "lstmBlock: Output arrays must all be rank 3");
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helpers::lstmBlockTimeLoop(maxTSLength, x, cLast, yLast, W, Wci, Wcf, Wco, b, i, c, f, o, z, h, y, {(double)peephole, forgetBias, clippingCellValue}, dataFormat);
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return Status::OK();
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}
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DECLARE_TYPES(lstmBlock) {
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getOpDescriptor()
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->setAllowedInputTypes(nd4j::DataType::ANY)
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->setAllowedOutputTypes({ALL_FLOATS});
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}
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DECLARE_SHAPE_FN(lstmBlock) {
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auto x = inputShape->at(1);
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auto cLast = inputShape->at(2);
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auto yLast = inputShape->at(3);
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auto W = inputShape->at(4);
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auto b = inputShape->at(8);
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REQUIRE_TRUE(shape::rank(x)==3, 0, "lstmBlock: Input array 1 (x) rank must be got input with rank %i", shape::rank(x));
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REQUIRE_TRUE(shape::rank(cLast)==2 && shape::rank(yLast)==2, 0, "lstmBlock: Input ranks must be 2 for inputs 2/3 (cLast, yLast) - got %i, %i", shape::rank(cLast), shape::rank(yLast));
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REQUIRE_TRUE(shape::rank(W)==2, 0, "lstmBlock: Weights array rank must be 2");
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REQUIRE_TRUE(shape::rank(b)==1, 0, "lstmBlock: Biases must be rank 1");
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const int dataFormat = INT_ARG(1); // 0=TNS=[seqLen,mb,size]; 1=NST=[mb,size,seqLen]; 2=NTS=[mb,seqLen,size]
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int bs;
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int t;
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int nOut = cLast[2]; //rank, bs, nOut, ...]
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Nd4jLong *s(nullptr);
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ALLOCATE(s, block.getWorkspace(), shape::shapeInfoLength(3), Nd4jLong); // [time, bS, nOut]
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s[0] = 3;
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if(dataFormat == 0){
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//[rank, seqLen, bs, nIn, ...]
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s[1] = x[1]; //seqLen
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s[2] = x[2]; //bS
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s[3] = nOut;
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} else if(dataFormat==1){
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//[rank, bs, nIn, seqLen, ...]
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s[1] = x[1]; //bS
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s[2] = nOut;
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s[3] = x[3]; //seqLen
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} else {
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//[rank, bs, seqLen, nIn, ...]
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s[1] = x[1]; //bS
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s[2] = x[2]; //seqLen
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s[3] = nOut;
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}
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ShapeUtils::updateStridesAndType(s, x, 'c');
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Nd4jLong *s1 = CONSTANT(s);
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//7 outputs, all same shape/type
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return SHAPELIST(s1, s1, s1, s1, s1, s1, s1);
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}
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}
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}
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#endif |