1 files changed, 60 insertions, 0 deletions
diff --git a/libs/ARMComputeEx/src/core/CL/cl_kernels/reduce_max.cl b/libs/ARMComputeEx/src/core/CL/cl_kernels/reduce_max.cl
new file mode 100644
index 000000000..dfa3b85f4
--- /dev/null
+++ b/libs/ARMComputeEx/src/core/CL/cl_kernels/reduce_max.cl
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
+ * 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 "helpers.h"
+
+#if defined(WIDTH)
+/** Perform reduce max
+ *
+ * @note Datatype should be given as a preprocessor argument using -DDATA_TYPE=type. e.g. -DDATA_TYPE=short
+ *
+ * @param[in]  input_ptr                            Pointer to the first source tensor. Supported data types:  F16/F32
+ * @param[in]  input_stride_x                       Stride of the first source tensor in X dimension (in bytes)
+ * @param[in]  input_step_x                         input_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in]  input_offset_first_element_in_bytes  The offset of the first element in the first source tensor
+ * @param[out] output_ptr                           Pointer to the destination tensor. Supported data types: same as @p input_ptr
+ * @param[out] output_stride_x                      Stride of the destination tensor in X dimension (in bytes)
+ * @param[out] output_step_x                        output_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[out] output_offset_first_element_in_bytes The offset of the first element in the destination tensor
+ */
+__kernel void reduce_max(VECTOR_DECLARATION(input),
+                         VECTOR_DECLARATION(output))
+{
+    Vector input = CONVERT_TO_VECTOR_STRUCT(input);
+    Vector output = CONVERT_TO_VECTOR_STRUCT(output);
+
+    __global float *input_addr = (__global float *)(input.ptr);
+    __global float *output_addr = (__global float *)(output.ptr);
+
+    float max_value = *input_addr;
+    for(int x = 1; x < WIDTH; x++)
+    {
+        float value = *(input_addr + x);
+        max_value = max(value, max_value);
+    }
+
+    // Store max
+    *output_addr = max_value;
+}
+#endif // defined(WIDTH)