| /* |
| * 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" |
| |
| /** This performs an activation function floating point inputs. |
| * |
| * @note In order to perform the activation function "in-place", the pre-processor -DIN_PLACE must be passed at compile time |
| * |
| * @note Datatype should be given as a preprocessor argument using -DDATA_TYPE=type. e.g. -DDATA_TYPE=short |
| * @note Activation function should be given as a preprocessor argument using -DNAME. e.g. -DTANH |
| * @note Distinction between floating point and integer is done using -DTYPE_FP and -DTYPE_INT preprocessor argument |
| * @note A, B variables required by some activation functions are set using -DA= and -DB= respectively. |
| * |
| * @param[in] input_ptr Pointer to the source image. Supported data types: F16, F32 |
| * @param[in] input_stride_x Stride of the source image 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_stride_y Stride of the source image in Y dimension (in bytes) |
| * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] input_stride_z Stride of the source tensor in Z dimension (in bytes) |
| * @param[in] input_step_z input_stride_z * number of elements along Z processed per workitem(in bytes) |
| * @param[in] input_offset_first_element_in_bytes The offset of the first element in the source image |
| * @param[out] output_ptr Pointer to the destination image. Supported data types: F16, F32 |
| * @param[in] output_stride_x Stride of the destination image in X dimension (in bytes) |
| * @param[in] output_step_x output_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] output_stride_y Stride of the destination image in Y dimension (in bytes) |
| * @param[in] output_step_y output_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] output_stride_z Stride of the source tensor in Z dimension (in bytes) |
| * @param[in] output_step_z output_stride_z * number of elements along Z processed per workitem(in bytes) |
| * @param[in] output_offset_first_element_in_bytes The offset of the first element in the destination image |
| */ |
| __kernel void activation_layer( |
| TENSOR3D_DECLARATION(input) |
| #if !defined IN_PLACE |
| , |
| TENSOR3D_DECLARATION(output) |
| #endif |
| ) |
| { |
| // Get pixels pointer |
| Tensor3D input = CONVERT_TO_TENSOR3D_STRUCT(input); |
| #if defined IN_PLACE |
| Tensor3D output = input; |
| #else |
| Tensor3D output = CONVERT_TO_TENSOR3D_STRUCT(output); |
| #endif |
| |
| // Load data |
| VEC_DATA_TYPE(DATA_TYPE, 16) |
| data = vload16(0, (__global DATA_TYPE *)input.ptr); |
| |
| // Perform activation |
| #if defined LOGISTIC |
| data = 1 / (1 + exp(-data)); |
| #elif defined TANH |
| data = (VEC_DATA_TYPE(DATA_TYPE, 16))A * tanh((VEC_DATA_TYPE(DATA_TYPE, 16))B * data); |
| #elif defined RELU |
| data = max(0, data); |
| #elif defined BRELU |
| data = min((VEC_DATA_TYPE(DATA_TYPE, 16))A, max(0, data)); |
| #elif defined SRELU |
| data = log(1 + exp(data)); |
| #elif defined ABS |
| #if defined TYPE_INT |
| data = abs(data); |
| #else |
| data = fabs(data); |
| #endif |
| #elif defined SQUARE |
| data = data * data; |
| #elif defined SQRT |
| data = sqrt(data); |
| #elif defined LINEAR |
| data = (VEC_DATA_TYPE(DATA_TYPE, 16))A * data + (VEC_DATA_TYPE(DATA_TYPE, 16))B; |
| #endif |
| |
| // Store result |
| vstore16(data, 0, (__global DATA_TYPE *)output.ptr); |
| } |