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Diffstat (limited to 'src/core/gpu/cl/kernels/ClQuantizeKernel.cpp')
| -rw-r--r-- | src/core/gpu/cl/kernels/ClQuantizeKernel.cpp | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/core/gpu/cl/kernels/ClQuantizeKernel.cpp b/src/core/gpu/cl/kernels/ClQuantizeKernel.cpp new file mode 100644 index 0000000000..48d351d536 --- /dev/null +++ b/src/core/gpu/cl/kernels/ClQuantizeKernel.cpp @@ -0,0 +1,175 @@ +/* + * 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 "src/core/gpu/cl/kernels/ClQuantizeKernel.h" + +#include "arm_compute/core/CL/CLHelpers.h" +#include "arm_compute/core/CL/CLKernelLibrary.h" +#include "arm_compute/core/CL/ICLTensor.h" +#include "arm_compute/core/Error.h" +#include "arm_compute/core/TensorInfo.h" +#include "arm_compute/core/Utils.h" +#include "arm_compute/core/Validate.h" +#include "arm_compute/core/utils/quantization/AsymmHelpers.h" + +#include "src/core/CL/CLValidate.h" +#include "src/core/helpers/WindowHelpers.h" + +#include "support/Cast.h" +#include "support/StringSupport.h" + +namespace arm_compute +{ +namespace opencl +{ +namespace kernels +{ +namespace +{ +Status validate_arguments(const ITensorInfo *src, const ITensorInfo *dst) +{ + ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(src, dst); + ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(src, 1, DataType::QASYMM8, DataType::QASYMM8_SIGNED, DataType::F32, DataType::F16); + ARM_COMPUTE_RETURN_ERROR_ON_F16_UNSUPPORTED(src); + + // Output must always be initialized + ARM_COMPUTE_RETURN_ERROR_ON(dst->tensor_shape().total_size() == 0); + ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(dst, 1, DataType::QASYMM8, DataType::QASYMM8_SIGNED, DataType::QASYMM16); + ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_SHAPES(src, dst); + + return Status{}; +} +} // namespace + +void ClQuantizeKernel::configure(const CLCompileContext &compile_context, const ITensorInfo *src, ITensorInfo *dst) +{ + ARM_COMPUTE_ERROR_ON_NULLPTR(src, dst); + + auto padding_info = get_padding_info({ src, dst }); + + ARM_COMPUTE_ERROR_THROW_ON(validate_arguments(src, dst)); + + const int vec_size_x = 16 / src->element_size(); + const int input_width_x = src->tensor_shape().x(); + const bool multi_access_x = (input_width_x / vec_size_x > 0); + + const UniformQuantizationInfo qinfo = dst->quantization_info().uniform(); + const DataType output_data_type = dst->data_type(); + + float scale_to_apply = qinfo.scale; + int32_t offset_to_apply = qinfo.offset; + if(is_data_type_quantized_asymmetric(src->data_type())) + { + /* + * In case of requantization of a quantized input tensor to an output tensor with another quantization + * instead of of apply dequantization and then a quantization functions, we just compute new scale and + * offset to apply. + * + * Assuming: + * - q_i as input quantized value + * - q_o as output quantized value + * - z_i as input quantization offset value + * - z_o as output quantization offset value + * - s_i as input quantization scale value + * - s_o as output quantization scale value + * - z_n as new quantization offset value + * - s_n as new quantization scale value + * + * q_o = ( q_i - z_i ) * s_i / s_o + z_o + * + * We can rewrite the formula as: + * + * q_o = ( q_i * s_i / s_o ) - z_i * s_i / s_o + z_o + * + * q_o = q_i / s_n + z_n + * + * Where: + * + * s_n = s_o / s_i + * + * z_n = - z_i * s_i / s_o + z_o + * + */ + const UniformQuantizationInfo qinfo_in = src->quantization_info().uniform(); + scale_to_apply /= qinfo_in.scale; + // In order to minimize flooring we convert the offset to a float, + // then compute the new offset in the float domain, + // finally we convert it back as int32_t + offset_to_apply -= static_cast<int32_t>(static_cast<float>(qinfo_in.offset) * qinfo_in.scale / qinfo.scale); + } + + // Create kernel + CLBuildOptions build_opts; + build_opts.add_option_if(is_data_type_float(src->data_type()), "-DIS_FLOAT"); + build_opts.add_option("-DSCALE=" + float_to_string_with_full_precision(scale_to_apply)); + build_opts.add_option("-DOFFSET=" + support::cpp11::to_string(offset_to_apply)); + build_opts.add_option("-DVEC_SIZE=" + support::cpp11::to_string(vec_size_x)); + build_opts.add_option("-DDATA_TYPE_IN=" + get_cl_type_from_data_type(src->data_type())); + build_opts.add_option("-DDATA_TYPE_OUT=" + get_cl_type_from_data_type(output_data_type)); + build_opts.add_option_if(multi_access_x, "-DLAST_ACCESSED_X=" + support::cpp11::to_string(std::max<int>(input_width_x - vec_size_x, 0))); + std::pair<int, int> min_max_quant_values = quantization::get_min_max_values_from_quantized_data_type(output_data_type); + build_opts.add_option("-DMIN_QUANT_VAL=" + support::cpp11::to_string(min_max_quant_values.first)); + build_opts.add_option("-DMAX_QUANT_VAL=" + support::cpp11::to_string(min_max_quant_values.second)); + + _kernel = create_kernel(compile_context, "quantization_layer", build_opts.options()); + + // Configure kernel window + Window win = calculate_max_window(*src, Steps()); + if(multi_access_x) + { + win.set(Window::DimX, Window::Dimension(win.x().start(), ceil_to_multiple(win.x().end(), vec_size_x), vec_size_x)); + } + ICLKernel::configure_internal(win); + + ARM_COMPUTE_ERROR_ON(has_padding_changed(padding_info)); +} + +Status ClQuantizeKernel::validate(const ITensorInfo *src, const ITensorInfo *dst) +{ + ARM_COMPUTE_RETURN_ON_ERROR(validate_arguments(src, dst)); + return Status{}; +} + +void ClQuantizeKernel::run_op(ITensorPack &tensors, const Window &window, cl::CommandQueue &queue) +{ + ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this); + ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICLKernel::window(), window); + + auto src = utils::cast::polymorphic_downcast<const ICLTensor *>(tensors.get_const_tensor(TensorType::ACL_SRC)); + auto dst = utils::cast::polymorphic_downcast<ICLTensor *>(tensors.get_tensor(TensorType::ACL_DST)); + + Window window_collapsed = window.collapse_if_possible(ICLKernel::window(), 3); + Window slice = window_collapsed.first_slice_window_3D(); + + do + { + unsigned int idx = 0; + add_3D_tensor_argument(idx, src, slice); + add_3D_tensor_argument(idx, dst, slice); + enqueue(queue, *this, slice, lws_hint()); + } + while(window_collapsed.slide_window_slice_3D(slice)); +} +} // namespace kernels +} // namespace opencl +} // namespace arm_compute |