Comment by lifthrasiir

Hmm, you successfully nerd-sniped me. AFAIK there are at least:

- 8-bit floating point types: (S1)E4M3 (finite only, has no-negative-zero variant), (S1)E5M2 (has no-negative-zero variant), E8M0

- 6-bit floating point types: (S1)E2M3, (S1)E3M2

- 4-bit floating point types: (S1)E2M1, NF4

- Block floating point types: MXFP8 (E5M2/E4M3*32+E8M0), MXFP6 (E3M2/E2M3*32+E8M0), MXFP4 (E2M1*32+E8M0), NXFP [1]

[1] https://arxiv.org/pdf/2412.19821

Do you have anything to add on?