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paddlepaddle--paddle/paddle/phi/kernels/xpu/concat_and_split_functor.cc
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2026-07-13 12:40:42 +08:00

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/* 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/funcs/concat_and_split_functor.h"
#include "paddle/phi/backends/xpu/enforce_xpu.h"
namespace phi {
namespace funcs {
using XPUDeviceGuard = backends::xpu::XPUDeviceGuard;
/*
* All tensors' dimension should be the same and the values of
* each dimension must be the same, except the axis dimension.
*/
template <typename T>
class ConcatFunctor<XPUContext, T> {
public:
void operator()(const XPUContext& dev_ctx,
const std::vector<DenseTensor>& input,
int axis,
DenseTensor* output) {
using XPUType = typename XPUTypeTrait<T>::Type;
int dev_id = dev_ctx.GetPlace().GetDeviceId();
XPUDeviceGuard guard(dev_id);
int num = input.size();
auto input_dims = input[0].dims();
std::vector<std::vector<int64_t>> xdims_list(num);
for (int i = 0; i < num; ++i) {
std::vector<int64_t> tmp_dims(input_dims.size());
for (int j = 0; j < input_dims.size(); ++j) {
tmp_dims[j] = input[i].dims()[j];
}
xdims_list[i] = tmp_dims;
}
std::vector<const XPUType*> ptrs;
for (int i = 0; i < num; ++i) {
if (input[i].place() != dev_ctx.GetPlace()) {
// data not on xpu, probably on cpu. move it now
DenseTensor tmp_data = input[i];
dev_ctx.template Alloc<T>(&tmp_data);
ptrs.push_back(reinterpret_cast<const XPUType*>(tmp_data.data<T>()));
} else {
ptrs.push_back(reinterpret_cast<const XPUType*>(input[i].data<T>()));
}
}
dev_ctx.template Alloc<T>(output);
auto r = xpu::concat<XPUType>(dev_ctx.x_context(),
ptrs,
reinterpret_cast<XPUType*>(output->data<T>()),
xdims_list,
axis);
PADDLE_ENFORCE_XDNN_SUCCESS(r, "concat");
}
};
template <typename T>
class SplitFunctor<XPUContext, T> {
public:
void operator()(const XPUContext& dev_ctx,
const DenseTensor& input,
const std::vector<const DenseTensor*>& ref_inputs,
const int axis,
std::vector<DenseTensor*>* outputs) {
using XPUType = typename XPUTypeTrait<T>::Type;
int dev_id = dev_ctx.GetPlace().GetDeviceId();
XPUDeviceGuard guard(dev_id);
auto& ins = ref_inputs;
int num = ins.size();
auto input_dims = ins[0]->dims();
// special for 0-dim shape
if (input_dims.size() == 0) {
input_dims = {1};
}
std::vector<int64_t> split_list(num);
std::vector<int64_t> xdims_list(input_dims.size());
int64_t total_length = 0;
for (int i = 0; i < num; ++i) {
auto ins_i_dims = ins[i]->dims();
// special for 0-dim shape
if (ins_i_dims.size() == 0) {
ins_i_dims = {1};
}
split_list[i] = ins_i_dims[axis];
total_length += ins_i_dims[axis];
}
for (int i = 0; i < input_dims.size(); ++i) {
if (i == axis) continue;
xdims_list[i] = input_dims[i];
}
xdims_list[axis] = total_length;
std::vector<XPUType*> ptrs(num);
for (int i = 0; i < num; ++i) {
dev_ctx.template Alloc<T>(outputs->at(i));
ptrs[i] = reinterpret_cast<XPUType*>(outputs->at(i)->data<T>());
}
DenseTensor tmp_data = input;
if (input.place() != dev_ctx.GetPlace()) {
// data not on xpu, probably on cpu. move it now
dev_ctx.template Alloc<T>(&tmp_data);
}
// int split(Context* xpu_ctx, const T* x, const std::vector<T*>& y_list,
// const std::vector<int64_t>& xshape, const std::vector<int64_t>&
// split_list, int64_t axis);
auto r = xpu::split<XPUType>(
dev_ctx.x_context(),
reinterpret_cast<const XPUType*>(tmp_data.data<T>()),
ptrs,
xdims_list,
split_list,
axis);
PADDLE_ENFORCE_XDNN_SUCCESS(r, "split");
}
};
#define DEFINE_XPU_FUNCTOR(type) \
template class ConcatFunctor<XPUContext, type>; \
template class SplitFunctor<XPUContext, type>;
DEFINE_XPU_FUNCTOR(float)
DEFINE_XPU_FUNCTOR(phi::float16)
DEFINE_XPU_FUNCTOR(phi::bfloat16)
DEFINE_XPU_FUNCTOR(int32_t)
DEFINE_XPU_FUNCTOR(int64_t)
DEFINE_XPU_FUNCTOR(uint8_t)
} // namespace funcs
} // namespace phi