Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016, 2017 ARM Limited. |
| 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #include "helpers.h" |
| 25 | |
| 26 | /** This performs an activation function floating point inputs. |
| 27 | * |
Gian Marco Iodice | b30dcc5 | 2017-06-20 09:07:21 +0100 | [diff] [blame] | 28 | * @note In order to perform the activation function "in-place", the pre-processor -DIN_PLACE must be passed at compile time |
| 29 | * |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 30 | * @note Datatype should be given as a preprocessor argument using -DDATA_TYPE=type. e.g. -DDATA_TYPE=short |
| 31 | * @note Activation function should be given as a preprocessor argument using -DNAME. e.g. -DTANH |
| 32 | * @note Distinction between floating point and integer is done using -DTYPE_FP and -DTYPE_INT preprocessor argument |
| 33 | * @note A, B variables required by some activation functions are set using -DA= and -DB= respectively. |
| 34 | * |
| 35 | * @param[in] input_ptr Pointer to the source image. Supported data types: F16, F32 |
| 36 | * @param[in] input_stride_x Stride of the source image in X dimension (in bytes) |
| 37 | * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes) |
| 38 | * @param[in] input_stride_y Stride of the source image in Y dimension (in bytes) |
| 39 | * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes) |
| 40 | * @param[in] input_stride_z Stride of the source tensor in Z dimension (in bytes) |
| 41 | * @param[in] input_step_z input_stride_z * number of elements along Z processed per workitem(in bytes) |
| 42 | * @param[in] input_offset_first_element_in_bytes The offset of the first element in the source image |
| 43 | * @param[out] output_ptr Pointer to the destination image. Supported data types: F16, F32 |
| 44 | * @param[in] output_stride_x Stride of the destination image in X dimension (in bytes) |
| 45 | * @param[in] output_step_x output_stride_x * number of elements along X processed per workitem(in bytes) |
| 46 | * @param[in] output_stride_y Stride of the destination image in Y dimension (in bytes) |
| 47 | * @param[in] output_step_y output_stride_y * number of elements along Y processed per workitem(in bytes) |
| 48 | * @param[in] output_stride_z Stride of the source tensor in Z dimension (in bytes) |
| 49 | * @param[in] output_step_z output_stride_z * number of elements along Z processed per workitem(in bytes) |
| 50 | * @param[in] output_offset_first_element_in_bytes The offset of the first element in the destination image |
| 51 | */ |
| 52 | __kernel void activation_layer( |
Gian Marco Iodice | b30dcc5 | 2017-06-20 09:07:21 +0100 | [diff] [blame] | 53 | TENSOR3D_DECLARATION(input) |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 54 | #ifndef IN_PLACE |
Gian Marco Iodice | b30dcc5 | 2017-06-20 09:07:21 +0100 | [diff] [blame] | 55 | , |
| 56 | TENSOR3D_DECLARATION(output) |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 57 | #endif /* not IN_PLACE */ |
Gian Marco Iodice | b30dcc5 | 2017-06-20 09:07:21 +0100 | [diff] [blame] | 58 | ) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 59 | { |
| 60 | // Get pixels pointer |
Gian Marco Iodice | b30dcc5 | 2017-06-20 09:07:21 +0100 | [diff] [blame] | 61 | Tensor3D input = CONVERT_TO_TENSOR3D_STRUCT(input); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 62 | #ifdef IN_PLACE |
Gian Marco Iodice | b30dcc5 | 2017-06-20 09:07:21 +0100 | [diff] [blame] | 63 | Tensor3D output = input; |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 64 | #else /* IN_PLACE */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 65 | Tensor3D output = CONVERT_TO_TENSOR3D_STRUCT(output); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 66 | #endif /* IN_PLACE */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 67 | |
| 68 | // Load data |
| 69 | VEC_DATA_TYPE(DATA_TYPE, 16) |
| 70 | data = vload16(0, (__global DATA_TYPE *)input.ptr); |
| 71 | |
| 72 | // Perform activation |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 73 | #ifdef LOGISTIC |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 74 | data = 1 / (1 + exp(-data)); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 75 | #elif defined(TANH) |
Gian Marco Iodice | b30dcc5 | 2017-06-20 09:07:21 +0100 | [diff] [blame] | 76 | data = (VEC_DATA_TYPE(DATA_TYPE, 16))A * tanh((VEC_DATA_TYPE(DATA_TYPE, 16))B * data); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 77 | #elif defined(RELU) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 78 | data = max(0, data); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 79 | #elif defined(BRELU) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 80 | data = min((VEC_DATA_TYPE(DATA_TYPE, 16))A, max(0, data)); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 81 | #elif defined(SRELU) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 82 | data = log(1 + exp(data)); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 83 | #elif defined(ABS) |
| 84 | #ifdef TYPE_INT |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 85 | data = abs(data); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 86 | #else /* TYPE_INT */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 87 | data = fabs(data); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 88 | #endif /* TYPE_INT */ |
| 89 | #elif defined(SQUARE) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 90 | data = data * data; |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 91 | #elif defined(SQRT) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 92 | data = sqrt(data); |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 93 | #elif defined(LINEAR) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 94 | data = (VEC_DATA_TYPE(DATA_TYPE, 16))A * data + (VEC_DATA_TYPE(DATA_TYPE, 16))B; |
Anthony Barbier | ac69aa1 | 2017-07-03 17:39:37 +0100 | [diff] [blame^] | 95 | #endif /* switch TANH, RELU, BRELU, SRELU, ABS, SQUARE, SQRT, LINEAR */ |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 96 | |
| 97 | // Store result |
| 98 | vstore16(data, 0, (__global DATA_TYPE *)output.ptr); |
| 99 | } |