| /* |
| * 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" |
| |
| #define TYPE VEC_DATA_TYPE(DATA_TYPE, VEC_SIZE) |
| |
| #if defined(FIXED_POINT_POSITION) |
| #include "fixed_point.h" |
| |
| #define CONST_ONE (1 << FIXED_POINT_POSITION) |
| #define ABS_OP(a) ABS_SAT_OP_EXPAND((a), DATA_TYPE, VEC_SIZE) |
| #define ADD_OP(a, b) ADD_SAT_OP_EXPAND((a), (b), DATA_TYPE, VEC_SIZE) |
| #define SUB_OP(a, b) SUB_SAT_OP_EXPAND((a), (b), DATA_TYPE, VEC_SIZE) |
| #define MUL_OP(a, b) MUL_SAT_OP_EXPAND((a), (b), DATA_TYPE, VEC_SIZE, FIXED_POINT_POSITION) |
| #define MLA_OP(a, b, c) MLA_SAT_OP_EXPAND((a), (b), (c), DATA_TYPE, VEC_SIZE, FIXED_POINT_POSITION) |
| #define DIV_OP(a, b) DIV_SAT_OP_VEC_EXPAND((a), (b), DATA_TYPE, VEC_SIZE, FIXED_POINT_POSITION) |
| #define EXP_OP(a) EXP_OP_EXPAND((a), DATA_TYPE, VEC_SIZE, FIXED_POINT_POSITION) |
| #define LOG_OP(a) LOG_OP_EXPAND((a), DATA_TYPE, VEC_SIZE, FIXED_POINT_POSITION) |
| #define SQRT_OP(a) DIV_OP(CONST_ONE, INVSQRT_OP_EXPAND((a), DATA_TYPE, VEC_SIZE, FIXED_POINT_POSITION)) |
| #define TANH_OP(a) TANH_OP_EXPAND((a), DATA_TYPE, VEC_SIZE, FIXED_POINT_POSITION) |
| |
| #else /* FIXED_POINT_POSITION */ |
| |
| #define CONST_ONE 1.f |
| #define ABS_OP(a) fabs((a)) |
| #define ADD_OP(a, b) ((a) + (b)) |
| #define SUB_OP(a, b) ((a) - (b)) |
| #define MUL_OP(a, b) ((a) * (b)) |
| #define MLA_OP(a, b, c) ((b) * (c) + (a)) |
| #define DIV_OP(a, b) ((a) / (b)) |
| #define EXP_OP(a) exp((a)) |
| #define LOG_OP(a) log((a)) |
| #define SQRT_OP(a) sqrt((a)) |
| #define TANH_OP(a) tanh((a)) |
| |
| #endif /* FIXED_POINT_POSITION */ |
| |
| // Logistic Activation |
| inline TYPE logistic_op(TYPE x) |
| { |
| return DIV_OP((TYPE)CONST_ONE, ADD_OP((TYPE)CONST_ONE, EXP_OP(-x))); |
| } |
| // Hyperbolic Tangent Activation |
| inline TYPE tanh_op(TYPE x) |
| { |
| return MUL_OP((TYPE)A_VAL, TANH_OP(MUL_OP((TYPE)B_VAL, x))); |
| } |
| // RELU Tangent Activation |
| inline TYPE relu_op(TYPE x) |
| { |
| return max(0, x); |
| } |
| // Bounded RELU Activation |
| inline TYPE brelu_op(TYPE x) |
| { |
| return min((TYPE)A_VAL, max(0, x)); |
| } |
| // Lower Upper Bounded RELU Activation |
| inline TYPE lu_brelu_op(TYPE x) |
| { |
| return min(max(x, (TYPE)B_VAL), (TYPE)A_VAL); |
| } |
| // Leaky RELU Activation |
| inline TYPE lrelu_op(TYPE x) |
| { |
| return select(MUL_OP((TYPE)A_VAL, x), x, x > (TYPE)0); |
| } |
| // Soft RELU Activation |
| inline TYPE srelu_op(TYPE x) |
| { |
| return LOG_OP(ADD_OP((TYPE)CONST_ONE, EXP_OP(x))); |
| } |
| // Absolute Activation |
| inline TYPE abs_op(TYPE x) |
| { |
| return ABS_OP(x); |
| } |
| // Square Activation |
| inline TYPE square_op(TYPE x) |
| { |
| return MUL_OP(x, x); |
| } |
| // Square-root Activation |
| inline TYPE sqrt_op(TYPE x) |
| { |
| return SQRT_OP(x); |
| } |
| // Linear Activation |
| inline TYPE linear_op(TYPE x) |
| { |
| return MLA_OP((TYPE)B_VAL, (TYPE)A_VAL, x); |
| } |
| |
| #define ACTIVATION_OP2(op, x) op##_op(x) |
| #define ACTIVATION_OP(op, x) ACTIVATION_OP2(op, x) |
| |
| /** 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 Vector size should be given as a preprocessor argument using -DVEC_SIZE=size. e.g. -DVEC_SIZE=16 |
| * @note Activation function should be given as a preprocessor argument using -DACT=name. e.g. -DACT=TANH |
| * @note A, B variables required by some activation functions are set using -DA_VAL= and -DB_VAL= respectively. |
| * @note In case of fixed point calculations the fixed point position is passed using -DFIXED_POINT_POSITION=position. e.g. -DFIXED_POINT_POSITION=3. |
| * |
| * @param[in] input_ptr Pointer to the source image. Supported data types: QS8/QS16/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: same as @p input_ptr |
| * @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) |
| #ifndef IN_PLACE |
| , |
| TENSOR3D_DECLARATION(output) |
| #endif /* not IN_PLACE */ |
| ) |
| { |
| // Get pixels pointer |
| Tensor3D input = CONVERT_TO_TENSOR3D_STRUCT(input); |
| #ifdef IN_PLACE |
| Tensor3D output = input; |
| #else /* IN_PLACE */ |
| Tensor3D output = CONVERT_TO_TENSOR3D_STRUCT(output); |
| #endif /* IN_PLACE */ |
| |
| // Load data |
| TYPE data = VLOAD(VEC_SIZE)(0, (__global DATA_TYPE *)input.ptr); |
| |
| // Perform activation |
| data = ACTIVATION_OP(ACT, data); |
| |
| // Store result |
| VSTORE(VEC_SIZE) |
| (data, 0, (__global DATA_TYPE *)output.ptr); |
| } |
