83 lines
3.1 KiB
C++
83 lines
3.1 KiB
C++
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/*******************************************************************************
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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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// @author George A. Shulinok <sgazeos@gmail.com>
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//
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#include <op_boilerplate.h>
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#if NOT_EXCLUDED(OP_random_gamma)
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#include <ops/declarable/headers/random.h>
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#include <ops/declarable/helpers/random.h>
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namespace nd4j {
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namespace ops {
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CUSTOM_OP_IMPL(random_gamma, 2, 1, false, 0, 0) {
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// gamma distribution
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auto rng = block.randomGenerator();
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auto shape = INPUT_VARIABLE(0);
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auto alpha = INPUT_VARIABLE(1);
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NDArray* beta = nullptr;
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if (block.width() > 2) {
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beta = INPUT_VARIABLE(2);
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REQUIRE_TRUE(ShapeUtils::areShapesBroadcastable(*alpha, *beta), 0, "random_gamma: alpha and beta shapes should be broadcastable.");
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}
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auto output = OUTPUT_VARIABLE(0);
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auto seed = 0;
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if (block.getIArguments()->size()) {
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seed = INT_ARG(0);
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}
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rng.setSeed(seed);
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helpers::fillRandomGamma(block.launchContext(), rng, alpha, beta, output);
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return Status::OK();
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}
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DECLARE_SHAPE_FN(random_gamma) {
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auto in = INPUT_VARIABLE(0);
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auto shape = in->template asVectorT<Nd4jLong>();
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auto alphaShape = inputShape->at(1);
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auto additionalShape = alphaShape;
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if (inputShape->size() > 2) {
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auto rest = inputShape->at(2); additionalShape = nullptr;
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REQUIRE_TRUE(ShapeUtils::areShapesBroadcastable(alphaShape, rest), 0, "random_gamma: alpha and beta shapes should be broadcastable.");
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ShapeUtils::evalBroadcastShapeInfo(alphaShape, rest, true, additionalShape, block.workspace());
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}
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auto lastDim = shape::sizeAt(alphaShape, 0);
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auto dtype = ArrayOptions::dataType(alphaShape);
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for (auto i = 0; i < shape::rank(additionalShape); i++)
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shape.push_back(shape::sizeAt(additionalShape, i));
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auto newShape = ConstantShapeHelper::getInstance()->createShapeInfo(dtype, 'c', shape);
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return SHAPELIST(newShape);
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}
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DECLARE_TYPES(random_gamma) {
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getOpDescriptor()
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->setAllowedInputTypes(0, {ALL_INTS})
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->setAllowedInputTypes(1, {ALL_FLOATS})
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->setAllowedInputTypes(2, {ALL_FLOATS})
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->setAllowedOutputTypes({ALL_FLOATS});
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}
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}
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}
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#endif
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