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paddlepaddle--paddle/paddle/phi/kernels/cpu/set_value_kernel.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 <type_traits>
#include "paddle/phi/kernels/set_value_kernel.h"
#include "paddle/phi/backends/cpu/cpu_context.h"
#include "paddle/phi/common/int_array.h"
#include "paddle/phi/common/scalar.h"
#include "paddle/phi/core/dense_tensor.h"
#include "paddle/phi/core/kernel_registry.h"
#include "paddle/phi/core/tensor_utils.h"
#include "paddle/phi/kernels/empty_kernel.h"
#include "paddle/phi/kernels/expand_kernel.h"
#include "paddle/phi/kernels/funcs/eigen/common.h"
#include "paddle/phi/kernels/funcs/math_function.h"
#include "paddle/phi/kernels/funcs/slice_utils.h"
namespace phi {
template <typename T, typename Context, size_t RANK>
void SetValueImpl(const Context& dev_ctx,
const DenseTensor& in,
const DenseTensor& value,
const IntArray& starts,
const IntArray& ends,
const IntArray& steps,
const std::vector<int64_t>& axes,
const std::vector<int64_t>& decrease_axes,
const std::vector<int64_t>& none_axes,
DenseTensor* out) {
auto in_dims = in.dims();
std::vector<int64_t> starts_local = starts.GetData();
std::vector<int64_t> ends_local = ends.GetData();
std::vector<int64_t> steps_local = steps.GetData();
if (starts_local.empty() && ends_local.empty() && steps_local.empty() &&
axes.empty() && decrease_axes.empty() && none_axes.empty() &&
value.numel() == 1) {
ExpandKernel<T, Context>(
dev_ctx, value, IntArray{vectorize<int64_t>(in.dims())}, out);
return;
}
funcs::CheckAndUpdateSliceAttrs(
in_dims, axes, &starts_local, &ends_local, &steps_local);
auto slice_dims = funcs::GetSliceDims(
in_dims, axes, starts_local, ends_local, &steps_local);
auto decrease_slice_dims = funcs::GetDecreasedDims(slice_dims, decrease_axes);
auto slice_dims_for_assign = decrease_slice_dims;
if (!none_axes.empty()) {
std::vector<int64_t> slice_dims_with_none;
size_t none_axes_cur = 0, decrease_axes_cur = 0;
for (int i = 0; i < slice_dims.size(); ++i) {
while (none_axes_cur < none_axes.size() &&
none_axes[none_axes_cur] <= i) {
slice_dims_with_none.push_back(1);
none_axes_cur++;
}
if (decrease_axes_cur < decrease_axes.size() &&
decrease_axes[decrease_axes_cur] == i) {
decrease_axes_cur++;
} else {
slice_dims_with_none.push_back(slice_dims[i]);
}
}
while (none_axes_cur < none_axes.size()) {
slice_dims_with_none.push_back(1);
none_axes_cur++;
}
slice_dims_for_assign = make_ddim(slice_dims_with_none);
}
funcs::CheckIsDimsMatch(slice_dims_for_assign, value.dims());
auto value_shape = vectorize<int64_t>(value.dims());
DenseTensor value_tensor = Empty<T>(dev_ctx, IntArray{value_shape});
value_tensor = value;
auto it = value_shape.begin();
while (it != value_shape.end() && *it == 1) {
it = value_shape.erase(it);
}
if (value_shape.empty()) value_shape.push_back(1);
value_tensor.Resize(value_shape);
auto expand_shape = vectorize<int64_t>(slice_dims_for_assign);
for (size_t i = 0; i < expand_shape.size(); i++) {
if (expand_shape[i] == 0) expand_shape[i] = 1;
}
if (expand_shape.empty()) expand_shape.push_back(1);
DenseTensor expand_tensor = Empty<T>(dev_ctx, IntArray{expand_shape});
auto place = dev_ctx.GetPlace();
auto& eigen_place = *dev_ctx.eigen_device();
Copy(dev_ctx, in, place, false, out);
ExpandKernel<T, Context>(
dev_ctx, value_tensor, IntArray{expand_shape}, &expand_tensor);
expand_tensor.Resize(slice_dims);
auto out_e = EigenTensor<T, RANK>::From(*out);
auto value_e = EigenTensor<T, RANK>::From(expand_tensor);
auto starts_indices = Eigen::DSizes<int64_t, RANK>();
auto ends_indices = Eigen::DSizes<int64_t, RANK>();
auto strides_indices = Eigen::DSizes<int64_t, RANK>();
for (size_t i = 0; i < RANK; ++i) {
starts_indices[i] = 0;
ends_indices[i] = slice_dims[i];
strides_indices[i] = 1;
}
for (size_t i = 0; i < axes.size(); i++) {
int axis_index = axes[i];
starts_indices[axis_index] = starts_local[i];
ends_indices[axis_index] = ends_local[i];
strides_indices[axis_index] = steps_local[i];
if (starts_local[i] ==
ends_local[i]) { // slice is empty, data will not be changed
return;
}
}
out_e.stridedSlice(starts_indices, ends_indices, strides_indices)
.device(eigen_place) = value_e;
}
template <typename T, typename Context>
void SetTensorValueKernel(const Context& dev_ctx,
const DenseTensor& x,
const DenseTensor& value,
const IntArray& starts,
const IntArray& ends,
const IntArray& steps,
const std::vector<int64_t>& axes,
const std::vector<int64_t>& decrease_axes,
const std::vector<int64_t>& none_axes,
DenseTensor* out) {
if (x.numel() == 0) {
dev_ctx.template Alloc<T>(out);
return;
}
const int rank = x.dims().size();
switch (rank) {
#define CASE_RANK(__RK) \
case __RK: \
SetValueImpl<T, Context, __RK>(dev_ctx, \
x, \
value, \
starts, \
ends, \
steps, \
axes, \
decrease_axes, \
none_axes, \
out); \
break;
CASE_RANK(1)
CASE_RANK(2)
CASE_RANK(3)
CASE_RANK(4)
CASE_RANK(5)
CASE_RANK(6)
#undef CASE_RANK
default:
PADDLE_THROW(errors::InvalidArgument(
"The rank of input should be less than 7, but received %d.", rank));
}
}
template <typename T, typename Context>
void SetValueKernel(const Context& dev_ctx,
const DenseTensor& x,
const IntArray& starts,
const IntArray& ends,
const IntArray& steps,
const std::vector<int64_t>& axes,
const std::vector<int64_t>& decrease_axes,
const std::vector<int64_t>& none_axes,
const std::vector<int64_t>& shape,
const std::vector<Scalar>& values,
DenseTensor* out) {
std::vector<T> assign_values;
assign_values.reserve(values.size());
for (const auto& val : values) {
assign_values.push_back(val.to<T>());
}
bool is_full_set_one_value = false;
std::vector<int64_t> starts_local = starts.GetData();
std::vector<int64_t> ends_local = ends.GetData();
std::vector<int64_t> steps_local = steps.GetData();
if (starts_local.empty() && ends_local.empty() && steps_local.empty() &&
shape.size() == 1 && shape[0] == 1 && assign_values.size() == 1) {
is_full_set_one_value = true;
}
if (is_full_set_one_value && std::is_same<T, float>::value) {
dev_ctx.template Alloc<T>(out);
funcs::set_constant(dev_ctx, out, static_cast<float>(assign_values[0]));
return;
}
DenseTensor value_tensor = Empty<T>(dev_ctx, shape);
TensorFromVector(assign_values, dev_ctx, &value_tensor);
value_tensor.Resize(shape);
SetTensorValueKernel<T, Context>(dev_ctx,
x,
value_tensor,
starts,
ends,
steps,
axes,
decrease_axes,
none_axes,
out);
}
} // namespace phi
PD_REGISTER_KERNEL(set_value,
CPU,
ALL_LAYOUT,
phi::SetValueKernel,
float,
double,
int,
int64_t,
bool,
int16_t,
uint8_t,
int8_t,
phi::float16,
phi::bfloat16,
phi::complex64,
phi::complex128) {}
PD_REGISTER_KERNEL(set_value_with_tensor,
CPU,
ALL_LAYOUT,
phi::SetTensorValueKernel,
float,
double,
int,
int64_t,
bool,
int16_t,
uint8_t,
int8_t,
phi::bfloat16,
phi::float16,
phi::complex64,
phi::complex128) {}