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Support for type-converting to FP16 from FP8e4m3 tensors using .to(cute.Float16).

Very similar to existing FP4->FP16, but with chunks of 4 instead of 8 to fit a INT32 source.

Questions:

Got a test, but cannot find a test folder for CuteDSL.
I saw that the integer conversions had supported SM's listed at the bottom, but FP4 did not. Not sure if it should be added for this, perhaps different PR to add for both?

@arseniivanov arseniivanov changed the title Feature/fp8e4m3 to fp16 conversion [CuTeDSL] Feature/fp8e4m3 to fp16 conversion Nov 29, 2025
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