wehub-resource-sync
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
|
|
//
|
|
// 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.
|
|
|
|
#include "paddle/phi/kernels/mv_grad_kernel.h"
|
|
|
|
#include "paddle/phi/backends/cpu/cpu_context.h"
|
|
#include "paddle/phi/core/kernel_registry.h"
|
|
#include "paddle/phi/kernels/full_kernel.h"
|
|
#include "paddle/phi/kernels/funcs/blas/blas.h"
|
|
|
|
namespace phi {
|
|
|
|
template <typename T, typename Context>
|
|
void MvGradKernel(const Context& dev_ctx,
|
|
const DenseTensor& x,
|
|
const DenseTensor& vec,
|
|
const DenseTensor& out_grad,
|
|
DenseTensor* x_grad,
|
|
DenseTensor* vec_grad) {
|
|
auto dout = out_grad;
|
|
auto dx = x_grad;
|
|
auto dvec = vec_grad;
|
|
if (x.numel() == 0 || vec.numel() == 0) {
|
|
if (dx) {
|
|
Full<T, Context>(dev_ctx, dx->dims(), static_cast<T>(0), dx);
|
|
}
|
|
if (dvec) {
|
|
Full<T, Context>(dev_ctx, dvec->dims(), static_cast<T>(0), dvec);
|
|
}
|
|
return;
|
|
}
|
|
|
|
const auto& dim_x = x.dims();
|
|
int m = static_cast<int>(dim_x[0]);
|
|
int n = static_cast<int>(dim_x[1]);
|
|
|
|
// get data ptr
|
|
const T* x_data = x.data<T>();
|
|
const T* vec_data = vec.data<T>();
|
|
const T* dout_data = dout.data<T>();
|
|
|
|
if (dx) {
|
|
T* dx_data = dev_ctx.template Alloc<T>(dx);
|
|
|
|
for (int i = 0; i < m; ++i) {
|
|
for (int j = 0; j < n; ++j) {
|
|
dx_data[i * n + j] = dout_data[i] * vec_data[j];
|
|
}
|
|
}
|
|
}
|
|
|
|
if (dvec) {
|
|
T* dvec_data = dev_ctx.template Alloc<T>(dvec);
|
|
|
|
auto blas = funcs::GetBlas<Context, T>(dev_ctx);
|
|
|
|
blas.GEMV(true,
|
|
dim_x[0],
|
|
dim_x[1],
|
|
static_cast<T>(1),
|
|
x_data,
|
|
dout_data,
|
|
static_cast<T>(0),
|
|
dvec_data);
|
|
}
|
|
}
|
|
|
|
} // namespace phi
|
|
|
|
PD_REGISTER_KERNEL(mv_grad, CPU, ALL_LAYOUT, phi::MvGradKernel, float, double) {
|
|
}
|