Add new operator AddMulAdd for Neon™ backend for Float/Quantized types

This is a fused operator that merges Add + Mul + Add [+ Relu-based-Activation] layers and have an intermediate output after the first Add. It's supported for FP16/32/QASYMM8/QASYMM8_SIGNED data types.

The subsequent Add and Mul are intended for scaling and the coefficients only have one dimension (per channel).

The inputs are
     - input1    : nD tensor   [X, Y, Z, W, ..]
     - input2    : nD tensor   [X, Y, Z, W, ..]
     - add_coef  : 1D tensor   [X]
     - mul_coef  : 1D tensor   [X]

The outputs are
     - out1          : nD tensor (intermediate output)  [X, Y, Z, W, ..]
     - out2          : nD tensor (final output)  [X, Y, Z, W, ..]

The operation can be summarized as follows:
     out1 <- input1 + input2
     out2 <- Act(out1 * mul_coef + add_coef)

The activation function can be Identity, Relu, Bounded Relu or Lower/Upper Bounded Relu. The intermediate output can be skipped by providing a nullptr.

The reason of providing this operator is to be able to fuse in case of Residual network patterns and save computations by reducing memory back and forward.

Resolves: COMPMID-5463

Signed-off-by: Gunes Bayir <gunes.bayir@arm.com>
Change-Id: I8ef577aa623b036e9a9f655cc088493fd19a6109
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9055
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Jakub Sujak <jakub.sujak@arm.com>
Reviewed-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>

2 files changed, 107 insertions, 1 deletions

diff --git a/arm_compute/runtime/NEON/NEFunctions.h b/arm_compute/runtime/NEON/NEFunctions.h
index a679e8c04e..8dbe6c59c3 100644
--- a/arm_compute/runtime/NEON/NEFunctions.h
+++ b/arm_compute/runtime/NEON/NEFunctions.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2022 Arm Limited.
+ * Copyright (c) 2016-2023 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -25,6 +25,7 @@
 #define ARM_COMPUTE_NEFUNCTIONS_H
 
 #include "arm_compute/runtime/NEON/functions/NEActivationLayer.h"
+#include "arm_compute/runtime/NEON/functions/NEAddMulAdd.h"
 #include "arm_compute/runtime/NEON/functions/NEArgMinMaxLayer.h"
 #include "arm_compute/runtime/NEON/functions/NEArithmeticAddition.h"
 #include "arm_compute/runtime/NEON/functions/NEArithmeticSubtraction.h"
diff --git a/arm_compute/runtime/NEON/functions/NEAddMulAdd.h b/arm_compute/runtime/NEON/functions/NEAddMulAdd.h
new file mode 100644
index 0000000000..28185f338f
--- /dev/null
+++ b/arm_compute/runtime/NEON/functions/NEAddMulAdd.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2023 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_RUNTIME_NEON_FUNCTIONS_NEADDMULADD
+#define ARM_COMPUTE_RUNTIME_NEON_FUNCTIONS_NEADDMULADD
+
+#include "arm_compute/core/Types.h"
+#include "arm_compute/runtime/IFunction.h"
+#include "arm_compute/runtime/IMemoryManager.h"
+
+#include <memory>
+
+namespace arm_compute
+{
+class ITensor;
+class ITensorInfo;
+
+/** Function to compute Add+Mul+Add fused operation */
+class NEAddMulAdd : public IFunction
+{
+public:
+    /** Constructor */
+    NEAddMulAdd(std::shared_ptr<IMemoryManager> memory_manager = nullptr);
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    NEAddMulAdd(const NEAddMulAdd &) = delete;
+    /** Prevent instances of this class from being moved (As this class contains non movable objects) */
+    NEAddMulAdd(NEAddMulAdd &&) = delete;
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    NEAddMulAdd &operator=(const NEAddMulAdd &) = delete;
+    /** Prevent instances of this class from being moved (As this class contains non movable objects) */
+    NEAddMulAdd &operator=(NEAddMulAdd &&) = delete;
+    /** Destructor */
+    ~NEAddMulAdd();
+    /** Initialize the function's inputs and outputs.
+     *
+     * Valid data layouts:
+     * - Any
+     *
+     * Valid data type configurations:
+     * |input1         |input2         |bn_mul         |bn_add         |add_output     |final_output   |
+     * |:--------------|:--------------|:--------------|:--------------|:--------------|:--------------|
+     * |QASYMM8        |QASYMM8        |QASYMM8        |QASYMM8        |QASYMM8        |QASYMM8        |
+     * |QASYMM8_SIGNED |QASYMM8_SIGNED |QASYMM8_SIGNED |QASYMM8_SIGNED |QASYMM8_SIGNED |QASYMM8_SIGNED |
+     * |F16            |F16            |F16            |F16            |F16            |F16            |
+     * |F32            |F32            |F32            |F32            |F32            |F32            |
+     *
+     * This is what this composite function (tailored for add followed by a batch norm operation) does:
+     *      add_output <- input1 + input2 (add)
+     *      final_output <- add_output * bn_mul + bn_add  (batch norm = mul+add)
+     *
+     * @param[in]  input1       First tensor input. Data type supported: QASYMM8/QASYMM8_SIGNED/F16/F32.
+     * @param[in]  input2       Second tensor input. Data types supported: Same as @p input.
+     * @param[in]  bn_mul       The multiplication coefficient on the feature dimension. Data types supported: Same as @p input.
+     *                          It's one dimensional tensor with size equal to the feature maps [FM]
+     * @param[in]  bn_add       The addition coefficient on the feature dimension. Data types supported: Same as @p input.
+     *                          It's one dimensional tensor with size equal to the feature maps [FM]
+     * @param[out] add_output   Output of the first add. Data type supported: Same as @p input.
+     * @param[out] final_output Output of the add+mul+add+act composite operation. Data type supported: Same as @p input.
+     * @param[in]  policy       Policy to handle overflow
+     * @param[in]  act_info     (Optional) Activation layer information in case of a fused activation.
+     *
+     */
+    void configure(ITensor *input1, ITensor *input2, ITensor *bn_mul, ITensor *bn_add,
+                   ITensor *add_output, ITensor *final_output,
+                   ConvertPolicy policy, const ActivationLayerInfo &act_info);
+    /** Static function to check if given info will lead to a valid configuration of @ref NEAddMulAdd
+     *
+     * Similar to @ref NEAddMulAdd::configure() except the arguments are @ref ITensorInfo * instead of @ref ITensor *
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *input1, const ITensorInfo *input2,
+                           const ITensorInfo *bn_mul, const ITensorInfo *bn_add,
+                           const ITensorInfo *add_output, const ITensorInfo *final_output,
+                           ConvertPolicy policy, const ActivationLayerInfo &act_info);
+
+    // Inherited methods overridden:
+    void run() override;
+
+private:
+    struct Impl;
+    std::unique_ptr<Impl> _impl;
+};
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_RUNTIME_NEON_FUNCTIONS_NEADDMULADD */