f16 support

[SludgePhD]

Network weights can be stored as f16 floats, halving the size of the network, which is often very desirable.

It would be nice if wonnx could support loading networks that do that. WebGPU has native support for f16 "half-precision" floats, so all GPU buffers could store them natively. Rust does not, however, so all network inputs and outputs would have to be converted.

[FL33TW00D]

Network weights can be stored as f16 floats, halving the size of the network, which is often very desirable.

It would be nice if wonnx could support loading networks that do that. WebGPU has native support for f16 "half-precision" floats, so all GPU buffers could store them natively. Rust does not, however, so all network inputs and outputs would have to be converted.

F16 is not supported in Naga yet: gfx-rs/wgpu#4384
Also not shipped in Chrome yet: https://bugs.chromium.org/p/dawn/issues/detail?id=1775&q=f16&can=2

[SludgePhD]

Ah, that's unfortunate. In that case, wonnx could still upconvert these values to f32 when loading these models to make them work.