Float16 / bfloat16

[baryluk]

Float16 or bfloat16 support for loads and stores is missing. I do not expect SIMD extensions to actually do operations on them in native format in hardware (but it would be nice to expose that and emulate transparently), but at least loading and storing (loads that widens into 32-bit floats) should be supported. Maybe not in the initial version, but these are very useful in machine learning and video/photo editing applications.

[ljharb]

Just a heads up, since I see you've filed a bunch of issues; please see the readme - this proposal is not active and browsers are not intending to implement it.

[baryluk]

Thanks. I just notice this after the fact. I will fill relevant issues into new WASM based tracker.