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/**
* Copyright (c) 2016-present, Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <fbgemm/FbgemmFP16.h>
#include "caffe2/core/context.h"
#include "caffe2/core/operator.h"
#include "caffe2/utils/conversions.h"
#include "caffe2/utils/math.h"
namespace caffe2 {
template <
class Context,
class Engine = DefaultEngine,
bool TransposeWeight = true,
typename TPacked = fbgemm::float16>
class FbGemmPackOp final : public Operator<Context> {
public:
USE_OPERATOR_CONTEXT_FUNCTIONS;
FbGemmPackOp(const OperatorDef& operator_def, Workspace* ws)
: Operator<Context>(operator_def, ws),
axis_(this->template GetSingleArgument<int32_t>("axis_w", 1)),
no_packing_(
this->template GetSingleArgument<int32_t>("no_packing", 0)) {}
~FbGemmPackOp() {}
bool RunOnDevice() override {
const auto& X = Input(0);
const auto canonical_axis = X.canonical_axis_index(axis_);
const auto N = X.size_to_dim(canonical_axis);
const auto K = X.size_from_dim(canonical_axis);
fbgemm::PackedGemmMatrixFP16* resultPtr;
if (TransposeWeight) {
resultPtr = new fbgemm::PackedGemmMatrixFP16(
fbgemm::matrix_op_t::Transpose,
K,
N,
1.0f, /*alpha*/
X.template data<float>());
} else {
resultPtr = new fbgemm::PackedGemmMatrixFP16(
fbgemm::matrix_op_t::NoTranspose,
N,
K,
1.0f, /*alpha*/
X.template data<float>());
}
if (no_packing_) {
C10_LOG_FIRST_N(WARNING, 10) << "no_packing will be deprecated soon";
vector<fbgemm::float16> src_mat(resultPtr->matSize());
fbgemm::float16* pmat = resultPtr->pmat();
memcpy(
src_mat.data(), pmat, resultPtr->matSize() * sizeof(fbgemm::float16));
resultPtr->unpackFromSrc(fbgemm::matrix_op_t::Transpose, src_mat.data());
}
auto* Y =
this->template Output<unique_ptr<fbgemm::PackedGemmMatrixFP16>>(0);
Y->reset(resultPtr);
return true;
}
protected:
size_t axis_{1};
// Do not pack the layout, for testing only
bool no_packing_;
};
} // namespace caffe2
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