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"ufunc_add_CUDA" not implemented for 'Float8_e4m3fn #44

@buaawangyu

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@buaawangyu

my device is RTX 4090D, torch.version: 2.7.1+cu126

when i debug different ops for fp8:

math operations like: a*b a+b a-b a/b ab a//b a%b not implemented for 'Float8_e4m3fn'**

other operations like: torch.empty zeros zeros_like ones_like ,cat stack run ok

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