add code implementation of cross entropy#491

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lzhengning wants to merge 5 commits intomasterfrom crossentropy

+166-12

Commits on Aug 25, 2023

Commits on Sep 8, 2023

polish
lzhengning
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Commits on Oct 12, 2023

Merge commit 'e4272cdd' into crossentropy
lzhengning
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Commits on Oct 27, 2023

support cross entropy with large input
lzhengning
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