Paddle 对 inf 的处理有问题

[tiancaishaonvjituizi]

bug描述 Describe the Bug

Reference：#42469 (comment)

>>> import paddle
>>> x=paddle.to_tensor([1,2,float('inf')])
>>> x==x
Tensor(shape=[3], dtype=bool, place=Place(gpu:0), stop_gradient=True,
       [True , True , False])

这表示在 paddle 里，inf == inf 是 false，这和 IEEE754 以及 Python 和 C++ 语言的实现都不一致，也和 PyTorch 不一致：

Python：

>>> float('inf')==float('inf')
True

C++：

$ cat test.cpp
#include <iostream>
#include <limits>

int main() {
  std::cout << (std::numeric_limits<float>::infinity ==
                std::numeric_limits<float>::infinity)
            << std::endl;
}
$ g++ test.cpp
$ ./a.out
1

PyTorch：

>>> import torch
>>> x=torch.tensor([1,2,float('inf')])
>>> x==x
tensor([True, True, True])

其他补充信息 Additional Supplementary Information

No response

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[FeixLiu]

感谢您提出的issue，我们会内部对该现象进行讨论。如有最新进展，会及时回复。

[tiancaishaonvjituizi]

Fixed in #44667