f16b Primitive Type

@Jamesbarford

Metadata
Contact	@Jamesbarford
Team(s)	compiler (@davidtwco), lang (@tmandry)
Goal document	2026/bf16

Summary

Implementation of a f16b type in core::num for the 16-bit
Brain Floating Point format.

This issue is intended for status updates only.

For general questions or comments, please contact a goal owner or post in the Zulip topic.

This issue is intended for status updates only.

For general questions or comments, please contact the owner(s) directly.

@folkertdev

f16b Implementation PR Is in review by @folkertdev, with the review comments are being addressed. Pipeline is green.
f16b RFC Is in review, with one outstanding item namely; "commit-to-no-other-bf16". Clarity is needed on whether the presently stated point about core::arch::x86::bf16 using f16b is enough to satisfy this outstanding item.

f16b Implementation PR further feedback has been addressed in simplifying the tests. Pipeline is green
f16b RFC All outstanding items have been handled