1 files changed, 84 insertions, 0 deletions
diff --git a/src/core/NEON/kernels/arm_conv/depthwise/premultiply.cpp b/src/core/NEON/kernels/arm_conv/depthwise/premultiply.cpp
new file mode 100644
index 0000000000..8a49c775d3
--- /dev/null
+++ b/src/core/NEON/kernels/arm_conv/depthwise/premultiply.cpp
@@ -0,0 +1,84 @@
+/*
+ * 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.
+ */
+
+#include <premultiply.hpp>
+
+#define CHANNEL_MULTIPLIER 6
+#define BLOCK_SIZE 4
+
+void do_premultiply_float_6(const float       *in_ptr,
+                            const unsigned int ld_row,
+                            const unsigned int ld_col,
+                            float             *out_ptr,
+                            const unsigned int out_ld_row,
+                            const unsigned int out_ld_col,
+                            const unsigned int tile_rows,
+                            const unsigned int tile_cols,
+                            const unsigned     input_channels)
+{
+    for(unsigned int i = 0; i < tile_rows; i++)
+    {
+        const float *ip2 = in_ptr + i * ld_row;
+        float       *op2 = out_ptr + i * out_ld_row;
+        for(unsigned int j = 0; j < tile_cols; j++)
+        {
+            const float *ip = ip2;
+            float       *op = op2;
+
+            unsigned int num_blocks = input_channels / BLOCK_SIZE;
+            for(unsigned int c = 0; c < num_blocks; c++)
+            {
+                float vals[BLOCK_SIZE];
+                for(unsigned int v = 0; v < BLOCK_SIZE; v++)
+                {
+                    vals[v] = ip[v];
+                }
+                ip += BLOCK_SIZE;
+
+                for(unsigned int v = 0; v < BLOCK_SIZE; v++)
+                {
+                    for(unsigned int r = 0; r < CHANNEL_MULTIPLIER; r++)
+                    {
+                        op[r] = vals[v];
+                    }
+                    op += CHANNEL_MULTIPLIER;
+                }
+            }
+
+            unsigned int rem = input_channels - num_blocks * BLOCK_SIZE;
+            for(unsigned int c = 0; c < rem; c++)
+            {
+                float val = ip[c];
+                for(unsigned int r = 0; r < CHANNEL_MULTIPLIER; r++)
+                {
+                    op[r] = val;
+                }
+                op += CHANNEL_MULTIPLIER;
+            }
+
+            ip2 += ld_col;
+            op2 += out_ld_col;
+        }
+    }
+}