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paddlepaddle--paddle/paddle/phi/kernels/cpu/uniform_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 "paddle/phi/kernels/uniform_kernel.h"
#include "paddle/phi/common/complex.h"
#include "paddle/phi/common/type_traits.h"
#include "paddle/phi/core/kernel_registry.h"
#include "paddle/phi/kernels/complex_kernel.h"
#include "paddle/phi/kernels/funcs/uniform_real_distribution.h"
namespace phi {
template <typename T, typename Context>
void UniformKernel(const Context &dev_ctx,
const IntArray &shape,
DataType dtype UNUSED,
const Scalar &min,
const Scalar &max,
int seed,
DenseTensor *out) {
out->Resize(shape.GetData());
T *data = dev_ctx.template Alloc<T>(out);
auto size = out->numel();
std::shared_ptr<std::mt19937_64> engine;
if (seed) {
engine = std::make_shared<std::mt19937_64>();
engine->seed(seed);
} else {
engine = dev_ctx.GetGenerator()->GetCPUEngine();
}
// Handle complex types separately
if constexpr (std::is_same_v<T, dtype::complex<float>> ||
std::is_same_v<T, dtype::complex<double>>) {
using RealType = dtype::Real<T>; // float or double
RealType min_val = min.to<RealType>();
RealType max_val = max.to<RealType>();
// Generate random values for real and imaginary parts separately
DenseTensor real_part, imag_part;
real_part.Resize(out->dims());
imag_part.Resize(out->dims());
RealType *real_data = dev_ctx.template Alloc<RealType>(&real_part);
RealType *imag_data = dev_ctx.template Alloc<RealType>(&imag_part);
// Generate real part
UniformRealDistribution<RealType>(
real_data, size, min_val, max_val, engine);
// Generate imaginary part
UniformRealDistribution<RealType>(
imag_data, size, min_val, max_val, engine);
// Combine real and imaginary parts using ComplexKernel
ComplexKernel<RealType, Context>(dev_ctx, real_part, imag_part, out);
} else {
// Original implementation for non-complex types
UniformRealDistribution<T>(
data, size, min.to<float>(), max.to<float>(), engine);
}
}
} // namespace phi
PD_REGISTER_KERNEL(uniform,
CPU,
ALL_LAYOUT,
phi::UniformKernel,
float,
double,
phi::float16,
phi::bfloat16,
phi::complex64,
phi::complex128) {}