ai-forever / ai-forever/ru-dalle

RealESRGAN fp16 inference problem

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Description

After merging #54, super resolution in FP16 is no longer working for me.
I am trying to determine if this is a code issue, or yet another problem with using FP16 on a GTX 1660S (like #11).

### Code to reproduce

https://gist.github.com/blue-fish/ae69ee32681a5be232538c96de15a1e4

### Original image (128x128)
![image_x1](https://user-images.githubusercontent.com/67130644/141292884-0f06f740-931b-415d-8b0e-2357a1d90556.png)

### Results

| | x2 | x4 |
| ------------------------- | ------------------------- | ------------------------- |
| fp16 | ![image_x2_fp16](https://user-images.githubusercontent.com/67130644/141292897-c2c385ef-d10d-4c8a-813f-96c5eab424bd.png) | ![image_x4_fp16](https://user-images.githubusercontent.com/67130644/141292910-0eb6813c-fbdf-45bb-8e59-f454ef37e5c9.png) |
| fp32 | ![image_x2_fp32](https://user-images.githubusercontent.com/67130644/141292904-7478e419-1c68-4628-aac3-a83659ada9de.png) | ![image_x4_fp32](https://user-images.githubusercontent.com/67130644/141292921-7ec165d2-a818-4b2b-b3a3-a6331f8be856.png) |

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