mirror of https://github.com/google/gemma.cpp.git
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
// Copyright 2024 Google LLC
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// SPDX-License-Identifier: Apache-2.0
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef THIRD_PARTY_GEMMA_CPP_GEMMA_ACTIVATIONS_H_
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#define THIRD_PARTY_GEMMA_CPP_GEMMA_ACTIVATIONS_H_
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#include "gemma/common.h"
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#include "hwy/aligned_allocator.h"
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namespace gcpp {
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template <typename T, typename TConfig>
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struct ForwardLayer {
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static constexpr size_t kSeqLen = TConfig::kSeqLen;
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static constexpr size_t kModelDim = TConfig::kModelDim;
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static constexpr size_t kQKVDim = TConfig::kQKVDim;
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static constexpr size_t kHeads = TConfig::kHeads;
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static constexpr size_t kFFHiddenDim = TConfig::kFFHiddenDim;
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std::array<T, kSeqLen * kModelDim> input;
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std::array<T, kSeqLen * kModelDim> pre_att_rms_out;
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std::array<T, kSeqLen * (kHeads + 2) * kQKVDim> qkv;
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std::array<T, kSeqLen * kHeads * kSeqLen> att;
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std::array<T, kSeqLen * kHeads * kQKVDim> att_out;
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std::array<T, kSeqLen * kModelDim> att_post1;
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std::array<T, kSeqLen * kModelDim> attention_out;
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std::array<T, kSeqLen * kModelDim> bf_pre_ffw_rms_out;
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std::array<T, kSeqLen * kFFHiddenDim * 2> ffw_hidden;
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std::array<T, kSeqLen * kFFHiddenDim> ffw_hidden_gated;
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};
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template <typename T, typename TConfig>
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struct ForwardPass {
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ForwardPass() {} // prevents placement-new calling memset
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static constexpr size_t kSeqLen = TConfig::kSeqLen;
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static constexpr size_t kModelDim = TConfig::kModelDim;
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static constexpr size_t kVocabSize = TConfig::kVocabSize;
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static constexpr size_t kLayers = TConfig::kLayers;
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std::array<ForwardLayer<T, TConfig>, kLayers> layers;
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std::array<T, kSeqLen * kModelDim> final_layer_output;
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std::array<T, kSeqLen * kModelDim> final_norm_output;
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std::array<T, kSeqLen * kVocabSize> logits;
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std::array<T, kSeqLen * kVocabSize> probs;
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static ByteStorageT Allocate() {
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return hwy::AllocateAligned<uint8_t>(sizeof(ForwardPass<T, TConfig>));
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}
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};
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template<typename T, typename TConfig>
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class ActivationsWrapper {
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using WrappedT = ForwardPass<T, TConfig>;
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public:
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ActivationsWrapper()
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: data_(WrappedT::Allocate()),
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activations_(*reinterpret_cast<WrappedT*>(data_.get())) {}
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const WrappedT& get() const { return activations_; }
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WrappedT& get() { return activations_; }
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private:
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ByteStorageT data_;
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WrappedT& activations_;
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};
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ByteStorageT AllocateForwardPass(Model model);
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} // namespace gcpp
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#endif // THIRD_PARTY_GEMMA_CPP_GEMMA_ACTIVATIONS_H_
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