From 56dd726ee074cb145612d03240b710f8adb82ddd Mon Sep 17 00:00:00 2001 From: Michele Di Giorgio Date: Thu, 27 Jul 2017 09:53:49 +0100 Subject: COMPMID-448: Implement CL Quantization/Dequantization Layer. Change-Id: Id002e23a2ac48af3d245416dc6411d9a04a1e513 Reviewed-on: http://mpd-gerrit.cambridge.arm.com/81827 Reviewed-by: Gian Marco Iodice Reviewed-by: Georgios Pinitas Tested-by: Kaizen --- src/core/CL/cl_kernels/quantization_layer.cl | 75 ++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 src/core/CL/cl_kernels/quantization_layer.cl (limited to 'src/core/CL/cl_kernels/quantization_layer.cl') diff --git a/src/core/CL/cl_kernels/quantization_layer.cl b/src/core/CL/cl_kernels/quantization_layer.cl new file mode 100644 index 0000000000..80ea54012f --- /dev/null +++ b/src/core/CL/cl_kernels/quantization_layer.cl @@ -0,0 +1,75 @@ +/* + * 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" + +/** This performs the quantization of floating point inputs to 8-bit unsigned integers. + * + * @param[in] input_ptr Pointer to the source image. Supported data types: 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: U8 + * @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 + * @param[in] min_max_ptr Pointer to the min/max vector. Minimum value in position 0, maximum value in position 1. Supported data types: F32. + * @param[in] min_max_stride_x Stride of the min/max vector in X dimension (in bytes) + * @param[in] min_max_step_x min_max_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] min_max_offset_first_element_in_bytes The offset of the first element in the min/max vector + */ +__kernel void quantization_layer( + TENSOR3D_DECLARATION(input), + TENSOR3D_DECLARATION(output), + VECTOR_DECLARATION(min_max)) +{ + // Get pixels pointer + Tensor3D input = CONVERT_TO_TENSOR3D_STRUCT(input); + Tensor3D output = CONVERT_TO_TENSOR3D_STRUCT(output); + + // min_max_value.s0 = min, min_max_value.s1 = max + const float2 min_max_value = vload2(0, (__global float *)(min_max_ptr + min_max_offset_first_element_in_bytes)); + + const float4 vmin = (float4)min_max_value.s0; + const float4 vrange = (float4)(min_max_value.s1 - min_max_value.s0); + + // Load data + float4 data = vload4(0, (__global float *)input.ptr); + + // Map float values to range [0.0, 1.0] + data = (data - vmin) / vrange; + + // Quantize and saturate + uchar4 res = convert_uchar4_sat(data * 256.0f); + + // Store result + vstore4(res, 0, (__global uchar *)output.ptr); +} -- cgit v1.2.1