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/*
* Copyright (c) 2018-2019 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 "arm_compute/core/NEON/kernels/NEElementwiseUnaryKernel.h"
#include "arm_compute/core/CPP/Validate.h"
#include "arm_compute/core/Error.h"
#include "arm_compute/core/Helpers.h"
#include "arm_compute/core/IAccessWindow.h"
#include "arm_compute/core/ITensor.h"
#include "arm_compute/core/NEON/NEAsymm.h"
#include "arm_compute/core/NEON/NEFixedPoint.h"
#include "arm_compute/core/NEON/wrapper/wrapper.h"
#include "arm_compute/core/TensorInfo.h"
#include "arm_compute/core/Validate.h"
#include <algorithm>
#include <arm_neon.h>
#include <cstdint>
#include <map>
#include <string>
namespace arm_compute
{
class Coordinates;
namespace
{
template <ElementWiseUnary op, typename ScalarType>
inline ScalarType elementwise_op_scalar(const ScalarType &a)
{
switch(op)
{
case ElementWiseUnary::RSQRT:
return 1 / sqrt(a);
case ElementWiseUnary::EXP:
return std::exp(a);
default:
ARM_COMPUTE_ERROR("NOT_SUPPORTED!");
}
}
template <ElementWiseUnary op, typename VectorType>
inline VectorType elementwise_op(const VectorType &a)
{
switch(op)
{
case ElementWiseUnary::RSQRT:
return wrapper::vinvsqrt(a);
case ElementWiseUnary::EXP:
return wrapper::vexpq(a);
default:
ARM_COMPUTE_ERROR("NOT_SUPPORTED!");
}
}
template <ElementWiseUnary op, typename ScalarType>
void elementwise_op(const ITensor *in, ITensor *out, const Window &window)
{
const int window_step_x = 16 / sizeof(ScalarType);
const auto window_start_x = static_cast<int>(window.x().start());
const auto window_end_x = static_cast<int>(window.x().end());
Window win = window;
win.set(Window::DimX, Window::Dimension(0, 1, 1));
Iterator input(in, win);
Iterator output(out, win);
execute_window_loop(win, [&](const Coordinates & id)
{
auto output_ptr = reinterpret_cast<ScalarType *>(output.ptr());
const auto input_ptr = reinterpret_cast<const ScalarType *>(input.ptr());
int x = window_start_x;
for(; x <= window_end_x - window_step_x; x += window_step_x)
{
wrapper::vstore(output_ptr + x, elementwise_op<op>(wrapper::vloadq(input_ptr + x)));
}
for(; x < window_end_x; ++x)
{
*(output_ptr + x) = elementwise_op_scalar<op>(*(input_ptr + x));
}
},
input, output);
}
template <ElementWiseUnary op>
std::function<void(const ITensor *input, ITensor *output, const Window &window)>
configure_func(const ITensor *input, ITensor *output)
{
std::string function_to_call("op_");
function_to_call += string_from_data_type(input->info()->data_type()) + "_";
function_to_call += string_from_data_type(output->info()->data_type());
static std::map<std::string, NEElementwiseUnaryKernel::ElementwiseUnaryFunction *> map_function =
{
{ "op_F32_F32", &elementwise_op<op, float> }
};
#ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
map_function["op_F16_F16"] = &elementwise_op<op, float16_t>;
#endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
auto it = map_function.find(function_to_call);
if(it != map_function.end())
{
auto func = it->second;
return [func](const ITensor * input, ITensor * output, const Window & window)
{
func(input, output, window);
};
}
return nullptr;
}
} // namespace
NEElementwiseUnaryKernel::NEElementwiseUnaryKernel()
: _function(nullptr), _input(nullptr), _output(nullptr)
{
}
void NEElementwiseUnaryKernel::configure(ElementWiseUnary op, const ITensor *input, ITensor *output)
{
ARM_COMPUTE_ERROR_THROW_ON(validate_arguments(*input->info(), *output->info()));
ARM_COMPUTE_ERROR_ON_NULLPTR(input, output);
// Configure kernel window
const std::pair<TensorShape, ValidRegion> broadcast_pair = ITensorInfo::broadcast_shape_and_valid_region(*input->info());
const TensorShape &out_shape = broadcast_pair.first;
const ValidRegion &valid_region = broadcast_pair.second;
// Auto initialize output if not initialized
auto_init_if_empty(*output->info(), out_shape, 1, input->info()->data_type());
Window win = calculate_max_window(valid_region);
_input = input;
_output = output;
INEKernel::configure(win);
switch(op)
{
case ElementWiseUnary::RSQRT:
_function = configure_func<ElementWiseUnary::RSQRT>(input, output);
break;
case ElementWiseUnary::EXP:
_function = configure_func<ElementWiseUnary::EXP>(input, output);
break;
default:
ARM_COMPUTE_ERROR("NOT_SUPPORTED!");
}
}
Status NEElementwiseUnaryKernel::validate_arguments(const ITensorInfo &input, const ITensorInfo &output)
{
ARM_COMPUTE_RETURN_ERROR_ON_CPU_F16_UNSUPPORTED(&input);
ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(&input, 1, DataType::F16, DataType::F32);
// Validate in case of configured output
if(output.total_size() > 0)
{
ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(&input, &output);
}
return Status{};
}
Status NEElementwiseUnaryKernel::validate(ElementWiseUnary op, const ITensorInfo *input, const ITensorInfo *output)
{
ARM_COMPUTE_UNUSED(op);
ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(input, output);
ARM_COMPUTE_RETURN_ON_ERROR(validate_arguments(*input, *output));
return Status{};
}
void NEElementwiseUnaryKernel::run(const Window &window, const ThreadInfo &info)
{
ARM_COMPUTE_UNUSED(info);
ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INEKernel::window(), window);
ARM_COMPUTE_ERROR_ON(_function == nullptr);
_function(_input, _output, window);
}
} // namespace arm_compute
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