#ifndef CAFFE2_OPERATORS_AFFINE_CHANNEL_OP_H_
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#define CAFFE2_OPERATORS_AFFINE_CHANNEL_OP_H_
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#include <string>
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#include "caffe2/core/context.h"
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#include "caffe2/core/logging.h"
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#include "caffe2/core/operator.h"
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#include "caffe2/utils/math.h"
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namespace caffe2 {
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template <typename T, class Context>
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class AffineChannelOp final : public Operator<Context> {
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public:
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USE_OPERATOR_CONTEXT_FUNCTIONS;
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template <class... Args>
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explicit AffineChannelOp(Args&&... args)
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: Operator<Context>(std::forward<Args>(args)...),
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order_(StringToStorageOrder(
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this->template GetSingleArgument<std::string>("order", "NCHW"))),
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OP_SINGLE_ARG(bool, "is_learnable", is_learnable_, false) {
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CAFFE_ENFORCE_NE(order_, StorageOrder::UNKNOWN);
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}
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bool RunOnDevice() override {
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return order_ == StorageOrder::NCHW ? RunOnDeviceWithOrderNCHW()
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: RunOnDeviceWithOrderNHWC();
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}
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bool RunOnDeviceWithOrderNCHW() {
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const auto& X = Input(0);
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const auto& scale = Input(1);
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const auto& bias = Input(2);
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if (is_learnable_) {
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CAFFE_ENFORCE(
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!IsInputOutputAlias(0, 0),
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"In-place affine_channel_op is not supported when "
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"is_learnable = true.");
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}
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const int N = X.dim32(0);
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const int C = X.dim32(1);
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const int HxW = X.numel() / (N * C);
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auto* Y = Output(0, X.sizes(), at::dtype<T>());
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math::AffineChannel<T, Context, StorageOrder::NCHW>(
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N,
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C,
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HxW,
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X.template data<T>(),
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scale.template data<T>(),
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bias.template data<T>(),
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Y->template mutable_data<T>(),
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&context_);
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return true;
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}
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bool RunOnDeviceWithOrderNHWC() {
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const auto& X = Input(0);
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const auto& scale = Input(1);
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const auto& bias = Input(2);
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if (is_learnable_) {
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CAFFE_ENFORCE(
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!IsInputOutputAlias(0, 0),
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"In-place affine_channel_op is not supported when "
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"is_learnable = true.");
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}
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const int ndim = X.dim();
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const int N = X.dim32(0);
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const int C = X.dim32(ndim - 1);
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const int HxW = X.numel() / (N * C);
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auto* Y =
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Output(0, X.sizes(), at::dtype<T>());
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math::AffineChannel<T, Context, StorageOrder::NHWC>(
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N,
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C,
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HxW,
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X.template data<T>(),
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scale.template data<T>(),
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bias.template data<T>(),
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Y->template mutable_data<T>(),
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&context_);
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return true;
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}
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private:
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const StorageOrder order_;
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const bool is_learnable_;
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};
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template <typename T, class Context>
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class AffineChannelGradientOp final : public Operator<Context> {
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public:
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USE_OPERATOR_CONTEXT_FUNCTIONS;
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template <class... Args>
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explicit AffineChannelGradientOp(Args&&... args)
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: Operator<Context>(std::forward<Args>(args)...),
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order_(StringToStorageOrder(
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this->template GetSingleArgument<std::string>("order", "NCHW"))),
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OP_SINGLE_ARG(bool, "is_learnable", is_learnable_, false) {
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CAFFE_ENFORCE_NE(order_, StorageOrder::UNKNOWN);
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}
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bool RunOnDevice() override {
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return order_ == StorageOrder::NCHW ? RunOnDeviceWithOrderNCHW()
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: RunOnDeviceWithOrderNHWC();
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}
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bool RunOnDeviceWithOrderNCHW();
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bool RunOnDeviceWithOrderNHWC();
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private:
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const StorageOrder order_;
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const bool is_learnable_;
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};
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} // namespace caffe2
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#endif // CAFFE2_OPERATORS_AFFINE_CHANNEL_OP_H_
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