COMPMID-1523: Fuse BN node with convolution.

Change-Id: I146936c9e98b343496a4b61cdbadf0eaa38e885a
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/154008
Reviewed-by: Michele DiGiorgio <michele.digiorgio@arm.com>
Reviewed-by: Giuseppe Rossini <giuseppe.rossini@arm.com>
Tested-by: bsgcomp <bsgcomp@arm.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/arm_compute/core/CL/kernels/CLFuseBatchNormalizationKernel.h b/arm_compute/core/CL/kernels/CLFuseBatchNormalizationKernel.h
new file mode 100644
index 0000000000..05a57c171e
--- /dev/null
+++ b/arm_compute/core/CL/kernels/CLFuseBatchNormalizationKernel.h
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_CLFUSEBATCHNORMALIZATIONKERNEL_H__
+#define __ARM_COMPUTE_CLFUSEBATCHNORMALIZATIONKERNEL_H__
+
+#include "arm_compute/core/CL/ICLKernel.h"
+
+namespace arm_compute
+{
+// Forward declarations
+class ICLTensor;
+
+/** OpenCL kernel to fuse the batch normalization node to a preceding convolution node */
+class CLFuseBatchNormalizationKernel : public ICLKernel
+{
+public:
+    /** Default constructor */
+    CLFuseBatchNormalizationKernel();
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    CLFuseBatchNormalizationKernel(const CLFuseBatchNormalizationKernel &) = delete;
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    CLFuseBatchNormalizationKernel &operator=(const CLFuseBatchNormalizationKernel &) = delete;
+    /** Allow instances of this class to be moved */
+    CLFuseBatchNormalizationKernel(CLFuseBatchNormalizationKernel &&) = default;
+    /** Allow instances of this class to be moved */
+    CLFuseBatchNormalizationKernel &operator=(CLFuseBatchNormalizationKernel &&) = default;
+    /** Default destructor */
+    ~CLFuseBatchNormalizationKernel() = default;
+    /** Set the source, destination of the kernel
+     *
+     * @param[in]  conv_weights  Convolution layer weights tensor. Data type supported: F16/F32
+     * @param[in]  bn_mean       Batch normalization layer mean tensor. Same as @p conv_weights
+     * @param[in]  bn_var        Batch normalization layer variance tensor. Same as @p conv_weights
+     * @param[out] fused_weights Output fused weights tensor. Same as @p conv_weights
+     * @param[out] fused_bias    Output fused bias tensor. Same as @p conv_weights
+     * @param[in]  conv_bias     (Optional) Convolution layer bias tensor. Same as @p conv_weights
+     * @param[in]  bn_beta       (Optional) Batch normalization layer beta tensor. Same as @p conv_weights
+     * @param[in]  bn_gamma      (Optional) Batch normalization layer gamma tensor. Same as @p conv_weights
+     * @param[in]  epsilon       (Optional) Batch normalization layer epsilon parameter. Defaults to 0.001f.
+     */
+    void configure(const ICLTensor *conv_weights, const ICLTensor *bn_mean, const ICLTensor *bn_var, ICLTensor *fused_weights, ICLTensor *fused_bias,
+                   const ICLTensor *conv_bias = nullptr, const ICLTensor *bn_beta = nullptr, const ICLTensor *bn_gamma = nullptr,
+                   float epsilon = 0.001f);
+    /** Static function to check if given info will lead to a valid configuration of @ref CLFuseBatchNormalizationKernel
+     *
+     * @param[in] conv_weights  Convolution layer weights tensor. Data type supported: F16/F32
+     * @param[in] bn_mean       Batch normalization layer mean tensor. Same as @p conv_weights
+     * @param[in] bn_var        Batch normalization layer variance tensor. Same as @p conv_weights
+     * @param[in] fused_weights Output fused weights tensor. Same as @p conv_weights
+     * @param[in] fused_bias    Output fused bias tensor. Same as @p conv_weights
+     * @param[in] conv_bias     (Optional) Convolution layer bias tensor. Same as @p conv_weights
+     * @param[in] bn_beta       (Optional) Batch normalization layer beta tensor. Same as @p conv_weights
+     * @param[in] bn_gamma      (Optional) Batch normalization layer gamma tensor. Same as @p conv_weights
+     * @param[in] epsilon       (Optional) Batch normalization layer epsilon parameter. Defaults to 0.001f.
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *conv_weights, const ITensorInfo *bn_mean, const ITensorInfo *bn_var,
+                           const ITensorInfo *fused_weights, const ITensorInfo *fused_bias,
+                           const ITensorInfo *conv_bias = nullptr, const ITensorInfo *bn_beta = nullptr, const ITensorInfo *bn_gamma = nullptr,
+                           float epsilon = 0.001f);
+
+    // Inherited methods overridden:
+    void run(const Window &window, cl::CommandQueue &queue) override;
+
+private:
+    const ICLTensor *_conv_weights;
+    const ICLTensor *_conv_bias;
+    const ICLTensor *_bn_mean;
+    const ICLTensor *_bn_var;
+    const ICLTensor *_bn_gamma;
+    const ICLTensor *_bn_beta;
+    ICLTensor       *_fused_weights;
+    ICLTensor       *_fused_bias;
+    float            _epsilon;
+    bool             _run_in_place_weights;
+    bool             _run_in_place_bias;
+};
+} // namespace arm_compute
+#endif /*__ARM_COMPUTE_CLFUSEBATCHNORMALIZATIONKERNEL_H__ */