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/*
* 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)
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