| /* |
| * 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" |
| #include "types.h" |
| |
| #ifndef DATA_TYPE_MIN |
| #define DATA_TYPE_MIN 0x0 |
| #endif /* DATA_TYPE_MIN */ |
| |
| #ifndef DATA_TYPE_MAX |
| #define DATA_TYPE_MAX 0xFF |
| #endif /* DATA_TYPE_MAX */ |
| |
| inline int FloatFlip(float val) |
| { |
| union |
| { |
| int int_val; |
| float flt_val; |
| } u_val; |
| u_val.flt_val = val; |
| return (u_val.int_val >= 0) ? u_val.int_val : u_val.int_val ^ 0x7FFFFFFF; |
| } |
| |
| __constant VEC_DATA_TYPE(DATA_TYPE, 16) type_min = (VEC_DATA_TYPE(DATA_TYPE, 16))(DATA_TYPE_MIN); |
| __constant VEC_DATA_TYPE(DATA_TYPE, 16) type_max = (VEC_DATA_TYPE(DATA_TYPE, 16))(DATA_TYPE_MAX); |
| __constant int16 idx16 = (int16)(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15); |
| |
| /** This function identifies the min and maximum value of an input image. |
| * |
| * @note Input image data type must be passed as a preprocessor argument using -DDATA_TYPE. |
| * Moreover, the minimum and maximum value of the given data type must be provided using -DDATA_TYPE_MIN and -DDATA_TYPE_MAX respectively. |
| * @note In case image width is not a multiple of 16 then -DNON_MULTIPLE_OF_16 must be passed. |
| * |
| * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| * @param[out] min_max Pointer to buffer with minimum value in position 0 and maximum value in position 1 |
| * @param[in] width Input image width |
| */ |
| __kernel void minmax( |
| IMAGE_DECLARATION(src), |
| __global int *min_max, |
| int width) |
| { |
| Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| |
| // Initialize local minimum and local maximum |
| VEC_DATA_TYPE(DATA_TYPE, 16) |
| local_min = type_max; |
| VEC_DATA_TYPE(DATA_TYPE, 16) |
| local_max = type_min; |
| |
| // Calculate min/max of row |
| int i = 0; |
| for(; i + 16 <= width; i += 16) |
| { |
| VEC_DATA_TYPE(DATA_TYPE, 16) |
| data = vload16(0, (__global DATA_TYPE *)offset(&src, i, 0)); |
| local_min = min(data, local_min); |
| local_max = max(data, local_max); |
| } |
| |
| #ifdef NON_MULTIPLE_OF_16 |
| // Handle non multiple of 16 |
| VEC_DATA_TYPE(DATA_TYPE, 16) |
| data = vload16(0, (__global DATA_TYPE *)offset(&src, i, 0)); |
| #ifdef IS_DATA_TYPE_FLOAT |
| int16 valid_indices = (i + idx16) < width; |
| #else /* IS_DATA_TYPE_FLOAT */ |
| VEC_DATA_TYPE(DATA_TYPE, 16) |
| valid_indices = CONVERT((i + idx16) < width, VEC_DATA_TYPE(DATA_TYPE, 16)); |
| #endif /* IS_DATA_TYPE_FLOAT */ |
| local_max = max(local_max, select(type_min, data, valid_indices)); |
| local_min = min(local_min, select(type_max, data, valid_indices)); |
| #endif /* NON_MULTIPLE_OF_16 */ |
| |
| // Perform min/max reduction |
| local_min.s01234567 = min(local_min.s01234567, local_min.s89ABCDEF); |
| local_max.s01234567 = max(local_max.s01234567, local_max.s89ABCDEF); |
| |
| local_min.s0123 = min(local_min.s0123, local_min.s4567); |
| local_max.s0123 = max(local_max.s0123, local_max.s4567); |
| |
| local_min.s01 = min(local_min.s01, local_min.s23); |
| local_max.s01 = max(local_max.s01, local_max.s23); |
| |
| local_min.s0 = min(local_min.s0, local_min.s1); |
| local_max.s0 = max(local_max.s0, local_max.s1); |
| |
| // Update global min/max |
| #ifdef IS_DATA_TYPE_FLOAT |
| atomic_min(&min_max[0], FloatFlip(local_min.s0)); |
| atomic_max(&min_max[1], FloatFlip(local_max.s0)); |
| #else /* IS_DATA_TYPE_FLOAT */ |
| atomic_min(&min_max[0], local_min.s0); |
| atomic_max(&min_max[1], local_max.s0); |
| #endif /* IS_DATA_TYPE_FLOAT */ |
| } |
| |
| /** This function counts the min and max occurrences in an image and tags their position. |
| * |
| * @note -DCOUNT_MIN_MAX should be specified if we want to count the occurrences of the minimum and maximum values. |
| * @note -DLOCATE_MIN and/or -DLOCATE_MAX should be specified if we want to store the position of each occurrence on the given array. |
| * |
| * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| * @param[in] min_max Pointer to buffer with minimum value in position 0 and maximum value in position 1 |
| * @param[out] min_max_count Pointer to buffer with minimum value occurrences in position 0 and maximum value occurrences in position 1 |
| * @param[out] min_loc Array that holds the location of the minimum value occurrences |
| * @param[in] max_min_loc_count The maximum number of min value occurrences coordinates the array can hold |
| * @param[out] max_loc Array that holds the location of the maximum value occurrences |
| * @param[in] max_max_loc_count The maximum number of max value occurrences coordinates the array can hold |
| */ |
| __kernel void minmaxloc( |
| IMAGE_DECLARATION(src), |
| __global int *min_max, |
| __global uint *min_max_count |
| #ifdef LOCATE_MIN |
| , |
| __global Coordinates2D *min_loc, uint max_min_loc_count |
| #endif /* LOCATE_MIN */ |
| #ifdef LOCATE_MAX |
| , |
| __global Coordinates2D *max_loc, uint max_max_loc_count |
| #endif /* LOCATE_MAX */ |
| ) |
| { |
| Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| |
| #ifdef IS_DATA_TYPE_FLOAT |
| __global float *min_max_ptr = (__global float *)min_max; |
| float min_value = min_max_ptr[0]; |
| float max_value = min_max_ptr[1]; |
| #else /* IS_DATA_TYPE_FLOAT */ |
| int min_value = min_max[0]; |
| int max_value = min_max[1]; |
| #endif /* IS_DATA_TYPE_FLOAT */ |
| |
| DATA_TYPE value = *((__global DATA_TYPE *)src.ptr); |
| #ifdef COUNT_MIN_MAX |
| if(value == min_value) |
| { |
| uint idx = atomic_inc(&min_max_count[0]); |
| #ifdef LOCATE_MIN |
| if(idx < max_min_loc_count) |
| { |
| min_loc[idx].x = get_global_id(0); |
| min_loc[idx].y = get_global_id(1); |
| } |
| #endif /* LOCATE_MIN */ |
| } |
| if(value == max_value) |
| { |
| uint idx = atomic_inc(&min_max_count[1]); |
| #ifdef LOCATE_MAX |
| if(idx < max_max_loc_count) |
| { |
| max_loc[idx].x = get_global_id(0); |
| max_loc[idx].y = get_global_id(1); |
| } |
| #endif /* LOCATE_MAX */ |
| } |
| #endif /* COUNT_MIN_MAX */ |
| } |