Webgpu reinterpret u32 bits as f32 and viceversa

[zeroexcuses]

Is there something more direct / efficient than:

export function f32Bits(bits: number): Scalar {
  const arr = new Uint32Array([bits]);
  return new Scalar(TypeF32, new Float32Array(arr.buffer)[0], arr);
}

[1]

This notion of constructing an array for every conversion seems awfully expensive.

[1] https://github.com/gpuweb/cts/blob/2a2d3a9/src/webgpu/util/conversion.ts#L918

[2e71828]

In Rust code, you can use f32::to_bits and f32::from_bits. That repository is all typescript code, though, so this seems like the wrong forum for the question.

[zeroexcuses]

@2e71828

That repository is all typescript code, though, so this seems like the wrong forum for the question.

That's definitely my fault; an article linked there, and I (incorrectly) thought it was wgsl code.

As an aside: is webgpu / wgpu / naga / wgsl on topic here? On one hand, it's a "different language"; on the other hand, most if the stack is Rust and GL questions seem accepted here.

[OptimisticPeach]

You'd be looking for bitcast for... bitcasting .

---

• The wgpu users matrix chat is pretty good for this kind of thing: https://app.element.io/#/room/#wgpu:matrix.org.

• The rust gamedev discord also has a lot of active users and one of the core wgpu devs is pretty active on there: Rust GameDev.