COMPMID-697 - Rework GEMMLowp interface on OpenCL

Reworked the interface of GemmLowp in order to make easy the integration
in Android NN

- Added support for different output stage
- Added validation for both matrix multiplication and output stage
- Added bounded relu support in the output stage
- Added in32_t bias support
- Added optimized path for vector by matrix case

This rework is required for:
- Convolution quantized
- Fully connected quantized

Change-Id: I512283d406099cf8c614dd89d0a97ed411143afc
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/110625
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: BSG Visual Compute Jenkins server to access repositories on http://mpd-gerrit.cambridge.arm.com <bsgcomp@arm.com>

1 files changed, 178 insertions, 0 deletions

diff --git a/src/runtime/CL/functions/CLGEMMLowpMatrixMultiplyCore.cpp b/src/runtime/CL/functions/CLGEMMLowpMatrixMultiplyCore.cpp
new file mode 100644
index 0000000000..5d2d13e243
--- /dev/null
+++ b/src/runtime/CL/functions/CLGEMMLowpMatrixMultiplyCore.cpp
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2017 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.
+ */
+#include "arm_compute/runtime/CL/functions/CLGEMMLowpMatrixMultiplyCore.h"
+
+#include "arm_compute/core/CL/ICLTensor.h"
+#include "arm_compute/core/Error.h"
+#include "arm_compute/core/Helpers.h"
+#include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/Types.h"
+#include "arm_compute/core/Validate.h"
+#include "arm_compute/runtime/CL/CLScheduler.h"
+
+using namespace arm_compute;
+
+CLGEMMLowpMatrixMultiplyCore::CLGEMMLowpMatrixMultiplyCore(std::shared_ptr<IMemoryManager> memory_manager)
+    : _memory_group(std::move(memory_manager)), _mm_kernel(), _mtx_a_reshape_kernel(), _mtx_b_reshape_kernel(), _mtx_a_reduction_kernel(), _mtx_b_reduction_kernel(), _offset_contribution_kernel(),
+      _vector_sum_col(), _vector_sum_row(), _tmp_a(), _tmp_b(), _a_offset(0), _b_offset(0), _is_interleaved_transposed(true)
+{
+}
+
+void CLGEMMLowpMatrixMultiplyCore::configure(const ICLTensor *a, const ICLTensor *b, ICLTensor *output)
+{
+    ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(a, 1, DataType::QASYMM8);
+    ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::S32);
+    ARM_COMPUTE_ERROR_ON_MISMATCHING_DATA_TYPES(a, b);
+    ARM_COMPUTE_ERROR_ON_MSG((a)->info()->dimension(0) != (b)->info()->dimension(1), "The product AB is defined only if the number of columns in A is equal to the number of rows in B");
+    ARM_COMPUTE_ERROR_ON_MSG((a)->info()->dimension(1) != (output)->info()->dimension(1), "The output matrix must have the same number of rows as the matrix A");
+    ARM_COMPUTE_ERROR_ON_MSG((b)->info()->dimension(0) != (output)->info()->dimension(0), "The output matrix must have the same number of columns as the matrix B");
+
+    _a_offset = a->info()->quantization_info().offset;
+    _b_offset = b->info()->quantization_info().offset;
+
+    // If the input tensor has less than 16 rows, we run a special version of GEMMLowp without reshaping the input tensors
+    _is_interleaved_transposed = a->info()->dimension(1) > 16;
+
+    const ICLTensor *matrix_a = a;
+    const ICLTensor *matrix_b = b;
+
+    if(_is_interleaved_transposed)
+    {
+        matrix_a = &_tmp_a;
+        matrix_b = &_tmp_b;
+
+        // The interleaved output matrix will have the following shape: [ a_height * 4, ceil(a_width / 4.0f) ]
+        TensorShape shape_tmp_a = a->info()->tensor_shape();
+        shape_tmp_a.set(0, a->info()->dimension(0) * 4);
+        shape_tmp_a.set(1, std::ceil(a->info()->dimension(1) / 4.f));
+
+        // The transpose1xW output matrix will have the following shape: [ b_height * 16, ceil(b_width / 16.0f) ]
+        TensorShape shape_tmp_b = b->info()->tensor_shape();
+        shape_tmp_b.set(0, b->info()->dimension(1) * 16);
+        shape_tmp_b.set(1, std::ceil(b->info()->dimension(0) / 16.f));
+
+        TensorInfo info_a(shape_tmp_a, 1, a->info()->data_type());
+        TensorInfo info_b(shape_tmp_b, 1, b->info()->data_type());
+        _tmp_a.allocator()->init(info_a);
+        _tmp_b.allocator()->init(info_b);
+        _memory_group.manage(&_tmp_a);
+        _memory_group.manage(&_tmp_b);
+
+        // Configure interleave kernel
+        _mtx_a_reshape_kernel.configure(a, &_tmp_a);
+
+        // Configure transpose kernel
+        _mtx_b_reshape_kernel.configure(b, &_tmp_b);
+    }
+
+    // Configure matrix multiply kernel
+    _mm_kernel.configure(matrix_a, matrix_b, output, _is_interleaved_transposed);
+
+    // Initialize matrix B reduction kernel only if _a_offset is not equal to 0
+    if(_a_offset != 0)
+    {
+        TensorShape shape_vector_sum_col = b->info()->tensor_shape();
+        if(b->info()->num_dimensions() > 1)
+        {
+            shape_vector_sum_col.remove_dimension(1);
+        }
+        TensorInfo info_vector_sum_col(shape_vector_sum_col, 1, DataType::S32);
+        _vector_sum_col.allocator()->init(info_vector_sum_col);
+        _memory_group.manage(&_vector_sum_col);
+
+        // Configure Matrix B reduction kernel
+        _mtx_b_reduction_kernel.configure(b, &_vector_sum_col);
+    }
+
+    // Initialize Matrix A reduction kernel only if _b_offset is not equal to 0
+    if(_b_offset != 0)
+    {
+        TensorShape shape_vector_sum_row = a->info()->tensor_shape();
+        shape_vector_sum_row.set(Window::DimX, a->info()->dimension(1));
+        if(a->info()->num_dimensions() > 1)
+        {
+            shape_vector_sum_row.remove_dimension(1);
+        }
+        TensorInfo info_vector_sum_row(shape_vector_sum_row, 1, DataType::S32);
+        _vector_sum_row.allocator()->init(info_vector_sum_row);
+        _memory_group.manage(&_vector_sum_row);
+
+        // Configure matrix A reduction kernel
+        _mtx_a_reduction_kernel.configure(a, &_vector_sum_row);
+    }
+
+    // Configure offset contribution kernel
+    _offset_contribution_kernel.configure(output, _a_offset == 0 ? nullptr : &_vector_sum_col, _b_offset == 0 ? nullptr : &_vector_sum_row, a->info()->dimension(0), _a_offset, _b_offset);
+
+    // Allocate tensors
+    if(_is_interleaved_transposed)
+    {
+        _tmp_a.allocator()->allocate();
+        _tmp_b.allocator()->allocate();
+    }
+
+    if(_a_offset != 0)
+    {
+        _vector_sum_col.allocator()->allocate();
+    }
+
+    if(_b_offset != 0)
+    {
+        _vector_sum_row.allocator()->allocate();
+    }
+}
+
+void CLGEMMLowpMatrixMultiplyCore::run()
+{
+    _memory_group.acquire();
+
+    if(_is_interleaved_transposed)
+    {
+        // Run reshape matrix A
+        CLScheduler::get().enqueue(_mtx_a_reshape_kernel, false);
+
+        // Run reshape matrix B
+        CLScheduler::get().enqueue(_mtx_b_reshape_kernel, false);
+    }
+
+    // Run matrix multiply
+    CLScheduler::get().enqueue(_mm_kernel, false);
+
+    // Run matrix A reduction kernel only if _b_offset is not equal to 0
+    if(_b_offset != 0)
+    {
+        CLScheduler::get().enqueue(_mtx_a_reduction_kernel, false);
+    }
+
+    // Run matrix B reduction kernel only if _a_offset is not equal to 0
+    if(_a_offset != 0)
+    {
+        CLScheduler::get().enqueue(_mtx_b_reduction_kernel, false);
+    }
+
+    // Run offset contribution kernel
+    CLScheduler::get().enqueue(_offset_contribution_kernel, true);
+
+    _memory_group.release();
+}