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This function is more accurate than torch.log() for small values of input - https://pytorch.org/docs/stable/generated/torch.log1p.html

Found with TorchFix https://github.com/pytorch-labs/torchfix/

Signed-off-by: Sergii Dymchenko <sdym@meta.com>
Co-authored-by: Xiaowei Ren <103958965+xrennvidia@users.noreply.github.com>
Co-authored-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>