cavis/libnd4j/include/ops/declarable/generic/random/set_seed.cpp

/*******************************************************************************
 * Copyright (c) 2015-2018 Skymind, Inc.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Apache License, Version 2.0 which is available at
 * https://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 ******************************************************************************/

//
//  @author raver119@gmail.com
//

#include <op_boilerplate.h>
#if NOT_EXCLUDED(OP_set_seed)

#include <ops/declarable/CustomOperations.h>
#include <NativeOps.h>

namespace nd4j {
    namespace ops {
        CUSTOM_OP_IMPL(set_seed, -2, 1, false, 0, -2) {
            REQUIRE_TRUE(block.getRNG() != nullptr, 0, "RNG should be defined in Graph");
            auto rng = block.getRNG();
            Nd4jLong seed = 0;
            if (block.getIArguments()->size() > 0) {
                seed = INT_ARG(0);
            } else if (block.width() > 0) {
                auto input = INPUT_VARIABLE(0);
                REQUIRE_TRUE(input->isScalar(),0 ,"SetSeed: Seed operand should be scalar");
                seed = input->e<Nd4jLong>(0);
            } else {
                REQUIRE_TRUE(false, 0, "SetSeed: either IArg or scalr input should be provided");
            }

            // FIXME: this approach isn't really good for cuda, since it'll assume that CUDA might get nullptr instead of stream
            refreshBuffer(nullptr, seed, (Nd4jPointer) rng);

            return Status::OK();
        }

        DECLARE_SHAPE_FN(set_seed) {
            auto newshape = ConstantShapeHelper::getInstance()->scalarShapeInfo(block.dataType());
            return SHAPELIST(newshape);
        }

        DECLARE_TYPES(set_seed) {
            getOpDescriptor()
                    ->setAllowedInputTypes({ALL_INTS})
                    ->setAllowedOutputTypes({ALL_FLOATS});
        }
    }
}

#endif