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Diffstat (limited to 'src/core/CL/cl_kernels/common/minmax_layer.cl')
| -rw-r--r-- | src/core/CL/cl_kernels/common/minmax_layer.cl | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/core/CL/cl_kernels/common/minmax_layer.cl b/src/core/CL/cl_kernels/common/minmax_layer.cl new file mode 100644 index 0000000000..49356451df --- /dev/null +++ b/src/core/CL/cl_kernels/common/minmax_layer.cl @@ -0,0 +1,101 @@ +/* + * Copyright (c) 2017-2021 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) && defined(HEIGHT) && defined(DEPTH) +/** This function identifies the min and maximum value of an input 3D tensor. + * + * @note The width, height and depth of the input tensor must be provided at compile time using -DWIDTH, -DHEIGHT and -DDEPTH (e.g. -DWIDTH=320, -DHEIGHT=240, -DDEPTH=3) + * + * @param[in] src_ptr Pointer to the source tensor. Supported data types: F32 + * @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_stride_z Stride of the source image in Z dimension (in bytes) + * @param[in] src_step_z src_stride_z * number of elements along Z 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] dst_ptr Pointer to the min/max vector. Minimum value in position 0, maximum value in position 1. Supported data types: F32. + * @param[in] dst_stride_x Stride of the min/max vector in X dimension (in bytes) + * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the min/max vector + */ +__kernel void minmax_layer( + TENSOR3D_DECLARATION(src), + VECTOR_DECLARATION(dst)) +{ + Tensor3D src = CONVERT_TO_TENSOR3D_STRUCT(src); + Vector dst = CONVERT_TO_VECTOR_STRUCT(dst); + + float4 min_value = (float4)FLT_MAX; + float4 max_value = (float4) - FLT_MAX; + float2 min_max_value = (float2)(FLT_MAX, -FLT_MAX); + + for(int z = 0; z < DEPTH; ++z) + { + for(int y = 0; y < HEIGHT; ++y) + { + int x = 0; + __global float *src_addr = (__global float *)(src.ptr + y * src_stride_y + z * src_stride_z); + + for(; x <= (int)(WIDTH - 8); x += 8) + { + float8 value = *(src_addr + x); + + min_value = select(value.s0123, min_value, min_value < value.s0123); + min_value = select(value.s4567, min_value, min_value < value.s4567); + + max_value = select(value.s0123, max_value, max_value > value.s0123); + max_value = select(value.s4567, max_value, max_value > value.s4567); + } + + for(; x < WIDTH; ++x) + { + float value = *(src_addr + x); + + min_max_value.s0 = min(min_max_value.s0, value); + min_max_value.s1 = max(min_max_value.s1, value); + } + } + } + + // Perform min/max reduction + min_value.s01 = min(min_value.s01, min_value.s23); + min_value.s0 = min(min_value.s0, min_value.s1); + max_value.s01 = max(max_value.s01, max_value.s23); + max_value.s0 = max(max_value.s0, max_value.s1); + + min_max_value.s0 = min(min_max_value.s0, min_value.s0); + min_max_value.s1 = max(min_max_value.s1, max_value.s0); + + if(min_max_value.s0 == min_max_value.s1) + { + min_max_value.s0 = 0.0f; + min_max_value.s1 = 1.0f; + } + + // Store min and max + vstore2(min_max_value, 0, (__global float *)dst.ptr); +} +#endif // defined(WIDTH) && defined(HEIGHT) && defined(DEPTH)
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