1 files changed, 90 insertions, 0 deletions
diff --git a/src/core/NEON/kernels/convolution/winograd/winograd_transforms/weights_2_7_fp32_fp32_integers.cpp b/src/core/NEON/kernels/convolution/winograd/winograd_transforms/weights_2_7_fp32_fp32_integers.cpp
new file mode 100644
index 0000000000..37ae43fdb0
--- /dev/null
+++ b/src/core/NEON/kernels/convolution/winograd/winograd_transforms/weights_2_7_fp32_fp32_integers.cpp
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2019 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.hpp"
+#include "kernel.hpp"
+
+namespace winograd
+{
+
+template <>
+void WeightTransform<1, 7, 1, 8, float, float, WinogradRoots::Integers>::execute(
+  const int n_output_channels,
+  const int n_input_channels,
+  const float* const input,  // NOTE: Data in HWIO order
+  float* const output,
+  const int matrix_stride,
+  const int matrix_row_stride
+)
+{
+  // Get pointers to each cell of the weight tensor
+  const auto weight_col_stride = n_input_channels * n_output_channels;
+  const float *inptrs[kernel_cols];
+  for (int j = 0; j < kernel_cols; j++)
+  {
+    inptrs[j] = input + j*weight_col_stride;
+  }
+
+  // For each input channel
+  for (int ic = 0; ic < n_input_channels; ic++)
+  {
+    float *outptr = output + ic * matrix_row_stride;
+
+    // For each output channel
+    int channels_remaining = n_output_channels;
+    for (; channels_remaining; channels_remaining--)
+    {
+      // Matrices used and computed in this kernel
+      float w[kernel_cols], V[inner_tile_cols];
+
+      // Read weights
+      for (int j = 0; j < kernel_cols; j++)
+      {
+        w[j] = *(inptrs[j]++);
+      }
+
+      // Compute V = w WT
+      V[0] = (w[0]*-1) / 36.0f;
+      V[1] = (w[1]*-1 + w[3]*-1 + w[5]*-1 + w[0]*1 + w[2]*1 + w[4]*1 + w[6]*1) / 48.0f;
+      V[2] = (w[0]*1 + w[1]*1 + w[2]*1 + w[3]*1 + w[4]*1 + w[5]*1 + w[6]*1) / 48.0f;
+      V[3] = (w[0]*-1 + w[6]*-64 + w[4]*-16 + w[2]*-4 + w[1]*2 + w[3]*8 + w[5]*32) / 120.0f;
+      V[4] = (w[0]*-1 + w[6]*-64 + w[5]*-32 + w[4]*-16 + w[3]*-8 + w[2]*-4 + w[1]*-2) / 120.0f;
+      V[5] = (w[5]*-243 + w[3]*-27 + w[1]*-3 + w[2]*9 + w[4]*81 + w[6]*729 + w[0]*1) / 720.0f;
+      V[6] = (w[1]*3 + w[2]*9 + w[3]*27 + w[4]*81 + w[5]*243 + w[6]*729 + w[0]*1) / 720.0f;
+      V[7] = (w[6]*1) / 1.0f;
+
+      // Store the transformed weights
+      for (int j = 0; j < inner_tile_cols; j++)
+      {
+        *(outptr + j*matrix_stride) = V[j];
+      }
+      outptr++;
+    }
+  }
+}
+
+template class WeightTransform<1, 7, 1, 8, float, float, WinogradRoots::Integers>;
+template class WeightTransform<7, 1, 8, 1, float, float, WinogradRoots::Integers>;
+
+}  // namespace winograd