COMPMID-476 L2 Normalization for CL
Change-Id: I88f87173645880eb823916c5d4ac884c372a4fb4
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/83269
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/src/core/CL/cl_kernels/reduction_operation.cl b/src/core/CL/cl_kernels/reduction_operation.cl
new file mode 100644
index 0000000..d46a226
--- /dev/null
+++ b/src/core/CL/cl_kernels/reduction_operation.cl
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2016, 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 "helpers.h"
+
+/** Calculate square sum of a vector
+ *
+ * @param[in] input Pointer to the first pixel.
+ *
+ * @return square sum of vector.
+ */
+inline DATA_TYPE square_sum(__global const DATA_TYPE *input)
+{
+ VEC_DATA_TYPE(DATA_TYPE, 16)
+ in = vload16(0, input);
+
+ in *= in;
+
+ in.s01234567 += in.s89ABCDEF;
+ in.s0123 += in.s4567;
+ in.s01 += in.s23;
+
+ return (in.s0 + in.s1);
+}
+
+/** Calculate sum of a vector
+ *
+ * @param[in] input Pointer to the first pixel.
+ *
+ * @return sum of vector.
+ */
+inline DATA_TYPE sum(__global const DATA_TYPE *input)
+{
+ VEC_DATA_TYPE(DATA_TYPE, 16)
+ in = vload16(0, input);
+
+ in.s01234567 += in.s89ABCDEF;
+ in.s0123 += in.s4567;
+ in.s01 += in.s23;
+
+ return (in.s0 + in.s1);
+}
+
+/** This kernel performs reduction given an operation.
+ *
+ * @note The data type must be passed at compile time using -DDATA_TYPE: e.g. -DDATA_TYPE=float
+ * @note The data size must be passed at compile time using -DDATA_SIZE e.g. -DDATA_SIZE=32
+ * @note The operation we want to perform must be passed at compile time using -DOPERATION e.g. -DOPERATION=square_sum
+ *
+ * @param[in] src_ptr Pointer to the source tensor. Supported data types: F32
+ * @param[in] src_stride_x Stride of the source tensor in X dimension (in bytes)
+ * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source tensor
+ * @param[in] partial_sum_ptr The local buffer to hold sumed values. Supported data types: same as @p src_ptt
+ * @param[in] partial_sum_stride_x Stride of the source tensor in X dimension (in bytes)
+ * @param[in] partial_sum_step_x partial_sum_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in] partial_sum_offset_first_element_in_bytes The offset of the first element in the source tensor
+ * @param[in] local_sums Local buffer for storing the partioal sum
+ */
+__kernel void reduction_operation(
+ VECTOR_DECLARATION(src),
+ VECTOR_DECLARATION(partial_sum),
+ __local DATA_TYPE *local_sums)
+{
+ Vector src = CONVERT_TO_VECTOR_STRUCT(src);
+ Vector partial_sum = CONVERT_TO_VECTOR_STRUCT(partial_sum);
+
+ unsigned int lsize = get_local_size(0);
+ unsigned int lid = get_local_id(0);
+
+ local_sums[lid] = OPERATION((__global DATA_TYPE *)src.ptr);
+ barrier(CLK_LOCAL_MEM_FENCE);
+
+ // Perform parallel reduction
+ for(unsigned int i = lsize >> 1; i > 0; i >>= 1)
+ {
+ if(lid < i)
+ {
+ local_sums[lid] += local_sums[lid + i];
+ }
+ barrier(CLK_LOCAL_MEM_FENCE);
+ }
+
+ if(lid == 0)
+ {
+ ((__global DATA_TYPE *)partial_sum.ptr + get_group_id(0))[0] = local_sums[0];
+ }
+}
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