Implemented compare_and_bitpack op.

libnd4j/include/ops/declarable/generic/parity_ops/compare_and_bitpack.cpp

@@ -0,0 +1,60 @@
+/*******************************************************************************
+ * 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 sgazeos@gmail.com
+//
+
+#include <ops/declarable/generic/helpers/BroadcastHelper.h>
+#include <ops/declarable/headers/parity_ops.h>
+#include <ops/declarable/headers/datatypes.h>
+#include <NDArrayFactory.h>
+
+namespace nd4j {
+    namespace ops {
+        CUSTOM_OP_IMPL(compare_and_bitpack, 2, 1, false, 0, 0) {
+            auto x = INPUT_VARIABLE(0);
+            auto y = INPUT_VARIABLE(1);
+            auto z = OUTPUT_VARIABLE(0);
+            auto z0 = NDArrayFactory::create<bool>(x->ordering(), x->getShapeAsVector());
+            BROADCAST_CHECK_EMPTY(x, y, (&z0));
+            
+            auto tZ = BroadcastHelper::broadcastApply(BROADCAST_BOOL(GreaterThan), x, y, &z0);
+            bitcast res;
+            auto status = res.execute({tZ}, {z}, {}, {DataType::UINT8}, {}, false);
+            if (tZ != &z0) {
+                delete tZ;
+            }
+            
+            return status;
+        }
+
+        DECLARE_TYPES(compare_and_bitpack) {
+            getOpDescriptor()
+                    ->setAllowedInputTypes(0, DataType::ANY)
+                    ->setAllowedInputTypes(1, DataType::ANY)
+                    ->setAllowedOutputTypes(0, DataType::UINT8);
+        }
+
+        DECLARE_SHAPE_FN(compare_and_bitpack) {
+            auto inShape = inputShape->at(0);
+            DataType newType = DataType::UINT8;
+
+            return SHAPELIST(ConstantShapeHelper::getInstance()->createShapeInfo(ShapeDescriptor(inShape, newType)));
+        }
+
+    }
+}

libnd4j/include/ops/declarable/headers/parity_ops.h

@@ -1731,6 +1731,20 @@ namespace nd4j {
         DECLARE_CONFIGURABLE_OP(fake_quant_with_min_max_vars, 3, 1, true, 0, -2);
         #endif
 
+        /**
+         * compare_and_bitpack - compare with greater and pack result with uint8 
+         *
+         * input params:
+         *    0 - NDArray (input)
+         *    1 - 0D Tensor - threshold
+         *
+         *
+         * output:
+         *    0 - NDArray with the same shape as input and type uint8
+         */
+        #if NOT_EXCLUDED(OP_compare_and_bitpack)
+        DECLARE_CUSTOM_OP(compare_and_bitpack, 2, 1, false, 0, 0);
+        #endif
     }
 }
 

libnd4j/tests_cpu/layers_tests/DeclarableOpsTests9.cpp

@@ -2387,6 +2387,25 @@ TEST_F(DeclarableOpsTests9, thresholdedrelu_test1) {
     delete result;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+TEST_F(DeclarableOpsTests9, compare_and_bitpack_test1) {
+
+    auto x = NDArrayFactory::create<double>('c', {2, 3, 4}, {-12.f, -11.f, -10.f, -9.f, -8.f, -7.f, -6.f, -5.f, -4.f, -3.f, -2.f, -1.f, 0.f, 1.f, 2.f, 3.f, 4.f, 5.f, 6.f, 7.f, 8.f, 9.f, 10.f, 11.f});
+    auto threshold = NDArrayFactory::create<double>(2.0);
+    auto exp = NDArrayFactory::create<uint8_t>('c', {2, 3, 4}, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                                                                                0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1});
+
+    nd4j::ops::compare_and_bitpack op;
+
+    auto result = op.execute({&x, &threshold}, {}, {}, {});
+    ASSERT_EQ(ND4J_STATUS_OK, result->status());
+    auto output = result->at(0);
+//    output->printIndexedBuffer("Packed to uint8");
+    ASSERT_TRUE(exp.isSameShape(output));
+    ASSERT_TRUE(exp.equalsTo(output));
+    delete result;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 TEST_F(DeclarableOpsTests9, thresholdedrelu_test2) {