mirror of https://github.com/google/gemma.cpp.git
95 lines
3.4 KiB
C++
95 lines
3.4 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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#include "backprop/backward.h"
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#include "backprop/prompt.h"
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#include "gemma/activations.h"
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#include "gemma/common.h"
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#include "hwy/contrib/thread_pool/thread_pool.h"
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// Compiles this file for multiple architectures via "foreach_target.h", to
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// which we pass the filename via macro 'argument'.
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#undef HWY_TARGET_INCLUDE
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#define HWY_TARGET_INCLUDE "backprop/backward.cc" // NOLINT
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#include "hwy/foreach_target.h" // IWYU pragma: keep
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#include "hwy/highway.h"
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// After highway.h
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#include "backprop/backward-inl.h"
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#include "gemma/weights.h"
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HWY_BEFORE_NAMESPACE();
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namespace gcpp {
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namespace HWY_NAMESPACE {
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template <typename TConfig>
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void CrossEntropyLossBackwardPass(const Prompt& prompt,
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const ByteStorageT& weights_u8,
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const ByteStorageT& forward_u8,
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ByteStorageT& grad_u8,
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ByteStorageT& backward_u8,
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hwy::ThreadPool& pool) {
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using TWeights = WeightsF<TConfig>;
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const auto& weights = *reinterpret_cast<const TWeights*>(weights_u8.get());
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auto& grad = *reinterpret_cast<TWeights*>(grad_u8.get());
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using TAct = ForwardPass<float, TConfig>;
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const auto& forward = *reinterpret_cast<const TAct*>(forward_u8.get());
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auto& backward = *reinterpret_cast<TAct*>(backward_u8.get());
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CrossEntropyLossBackwardPass(prompt, weights, forward, grad, backward, pool);
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}
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void CrossEntropyLossBackwardPassT(Model model,
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const Prompt& prompt,
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const ByteStorageT& weights,
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const ByteStorageT& forward,
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ByteStorageT& grad,
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ByteStorageT& backward,
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hwy::ThreadPool& pool) {
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// TODO(janwas): use CallFunctorForModel
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switch (model) {
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case Model::GEMMA_2B:
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CrossEntropyLossBackwardPass<ConfigGemma2B<float>>(
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prompt, weights, forward, grad, backward, pool);
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break;
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case Model::GEMMA_TINY:
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CrossEntropyLossBackwardPass<ConfigGemmaTiny<float>>(
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prompt, weights, forward, grad, backward, pool);
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break;
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default:
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HWY_ABORT("Model type %d unknown.", static_cast<int>(model));
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}
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}
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} // namespace HWY_NAMESPACE
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} // namespace gcpp
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HWY_AFTER_NAMESPACE();
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#if HWY_ONCE
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namespace gcpp {
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HWY_EXPORT(CrossEntropyLossBackwardPassT);
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void CrossEntropyLossBackwardPass(
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const Model& model, const Prompt& prompt,
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const ByteStorageT& weights, const ByteStorageT& forward,
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ByteStorageT& grad, ByteStorageT& backward, hwy::ThreadPool& pool) {
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return HWY_DYNAMIC_DISPATCH(CrossEntropyLossBackwardPassT)(
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model, prompt, weights, forward, grad, backward, pool);
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}
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} // namespace gcpp
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#endif // HWY_ONCE
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