wehub-resource-sync
131 lines
4.4 KiB
C++
131 lines
4.4 KiB
C++
// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
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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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// http://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 "paddle/phi/kernels/reduce_max_grad_kernel.h"
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#include "paddle/phi/backends/xpu/enforce_xpu.h"
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#include "paddle/phi/backends/xpu/xpu_context.h"
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#include "paddle/phi/core/kernel_registry.h"
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#include "paddle/phi/kernels/xpu/reduce.h"
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namespace phi {
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template <typename T, typename Context>
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void ReduceMaxGradKernel(const Context& dev_ctx,
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const DenseTensor& x,
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const DenseTensor& out,
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const DenseTensor& out_grad,
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const IntArray& dims_arr,
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bool keep_dim,
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bool reduce_all,
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DenseTensor* x_grad) {
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if (x_grad && x_grad->numel() == 0) {
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dev_ctx.template Alloc<T>(x_grad);
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return;
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}
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using XPUDataType = typename XPUTypeTrait<T>::Type;
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reduce_all = recompute_reduce_all(x, dims_arr, reduce_all);
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auto dims = dims_arr.GetData();
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dev_ctx.template Alloc<T>(x_grad);
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const XPUDataType* x_data = reinterpret_cast<const XPUDataType*>(x.data<T>());
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const XPUDataType* out_data =
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reinterpret_cast<const XPUDataType*>(out.data<T>());
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const XPUDataType* out_grad_data =
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reinterpret_cast<const XPUDataType*>(out_grad.data<T>());
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XPUDataType* x_grad_data = reinterpret_cast<XPUDataType*>(x_grad->data<T>());
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const auto& input_dim_size = x.dims().size();
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std::vector<int64_t> true_dims;
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for (size_t i = 0; i < dims.size(); ++i) {
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if (dims[i] < 0) {
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true_dims.push_back(dims[i] + input_dim_size);
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} else {
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true_dims.push_back(dims[i]);
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}
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}
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std::vector<int64_t> ydims(input_dim_size);
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std::vector<int64_t> xdims((input_dim_size));
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std::set<int64_t> dims_set(true_dims.begin(), true_dims.end());
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for (auto i = 0; i < input_dim_size; i++) {
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xdims[i] = x.dims()[i];
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if (dims_set.find(i) != dims_set.end() || reduce_all) {
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ydims[i] = 1;
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} else {
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ydims[i] = x.dims()[i];
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}
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}
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XPUDataType* broadcast1 = nullptr;
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XPUDataType* broadcast2 = nullptr;
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bool* equal = nullptr;
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xpu::ctx_guard RAII_GUARD(dev_ctx.x_context());
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broadcast1 = RAII_GUARD.alloc_l3_or_gm<XPUDataType>(x.numel());
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PADDLE_ENFORCE_NOT_NULL(
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broadcast1, errors::ResourceExhausted("XPU has no enough memory"));
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equal = RAII_GUARD.alloc_l3_or_gm<bool>(x.numel());
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PADDLE_ENFORCE_NOT_NULL(
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equal, errors::ResourceExhausted("XPU has no enough memory"));
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broadcast2 = RAII_GUARD.alloc_l3_or_gm<XPUDataType>(x.numel());
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PADDLE_ENFORCE_NOT_NULL(
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broadcast2, errors::ResourceExhausted("XPU has no enough memory"));
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// use [1] to replace [], because xpu not support []
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if (xdims.size() == 0) {
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xdims = std::vector<int64_t>({1});
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}
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if (ydims.size() == 0) {
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ydims = std::vector<int64_t>({1});
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}
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// step 1. broadcast out and out_grad
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int r =
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xpu::broadcast(dev_ctx.x_context(), out_data, broadcast1, ydims, xdims);
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PADDLE_ENFORCE_XDNN_SUCCESS(r, "broadcast");
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r = xpu::broadcast(
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dev_ctx.x_context(), out_grad_data, broadcast2, ydims, xdims);
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PADDLE_ENFORCE_XDNN_SUCCESS(r, "broadcast");
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// step 2. compare out_broadcast and x
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r = xpu::equal(dev_ctx.x_context(), x_data, broadcast1, equal, x.numel());
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PADDLE_ENFORCE_XDNN_SUCCESS(r, "equal");
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// step 3. get x_grad
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r = xpu::constant(
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dev_ctx.x_context(), broadcast1, x.numel(), static_cast<XPUDataType>(0));
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PADDLE_ENFORCE_XDNN_SUCCESS(r, "constant");
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r = xpu::where(dev_ctx.x_context(),
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equal,
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broadcast2,
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broadcast1,
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x_grad_data,
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xdims,
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xdims);
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PADDLE_ENFORCE_XDNN_SUCCESS(r, "where");
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}
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} // namespace phi
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PD_REGISTER_KERNEL(max_grad,
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XPU,
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ALL_LAYOUT,
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phi::ReduceMaxGradKernel,
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float,
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phi::float16,
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phi::bfloat16) {}
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