deeplearning4j/deeplearning4j

/* ******************************************************************************
 *
 *
 * 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.
 *
 *  See the NOTICE file distributed with this work for additional
 *  information regarding copyright ownership.
 * 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 Yurii Shyrma (iuriish@yahoo.com), created on 12.12.2017
//

#include <system/op_boilerplate.h>
#if NOT_EXCLUDED(OP_betainc)

#include <ops/declarable/CustomOperations.h>
#include <ops/declarable/helpers/betaInc.h>

namespace sd {
namespace ops {

DECLARE_TYPES(betainc) { getOpDescriptor()->setAllowedInputTypes({ALL_FLOATS})->setSameMode(true); }

CONFIGURABLE_OP_IMPL(betainc, 3, 1, false, 0, 0) {
  auto a = INPUT_VARIABLE(0);
  auto b = INPUT_VARIABLE(1);
  auto x = INPUT_VARIABLE(2);

  // just skip op if input is empty
  if (x->isEmpty()) {
    *x = DataTypeUtils::nanOrZero<float>();
    return sd::Status::OK;
  }

  auto output = OUTPUT_VARIABLE(0);

  REQUIRE_TRUE(a->isSameShape(b) && a->isSameShape(x), 0,
               "CONFIGURABLE_OP betainc: all three input arrays must have the same shapes, bit got a=%s, b=%s and x=%s "
               "instead !",
               ShapeUtils::shapeAsString(a).c_str(), ShapeUtils::shapeAsString(b).c_str(),
               ShapeUtils::shapeAsString(x).c_str());

  sd::LongType arrLen = a->lengthOf();

  // FIXME: this stuff should be single op call. No sense rolling over couple of arrays twice
  for (sd::LongType i = 0; i < arrLen; ++i) {
    REQUIRE_TRUE(a->e<float>(i) > 0.f, 0, "BETAINC op: arrays a array must contain only elements > 0 !");
    REQUIRE_TRUE(b->e<float>(i) > 0.f, 0, "BETAINC op: arrays b array must contain only elements > 0 !");
    REQUIRE_TRUE(0.f <= x->e<float>(i) && x->e<float>(i) <= 1.f, 0,
                 "BETAINC op: all elements of x array must be within [0, 1] range!");
  }

  helpers::betaInc(block.launchContext(), *a, *b, *x, *output);

  return sd::Status::OK;
}

DECLARE_SYN(BetaInc, betainc);
DECLARE_SYN(betaInc, betainc);

}  // namespace ops
}  // namespace sd

#endif