Description
According to WGSL spec, sign(0) = 0
In constant_evaluator.rs the signum method is used to evaluate sign(e).
However, 0_f32.signum() and f16::ZERO.signum() output 1.0f, not 0.0f.
https://doc.rust-lang.org/std/primitive.f32.html#method.signum
https://docs.rs/half/latest/half/struct.f16.html#method.signum

Because of this, the following shader outputs 1.0f:

struct StorageBuffer {
    a: f32,
}

@group(0)
@binding(0)
var<storage, read_write> s_output: StorageBuffer;

@compute
@workgroup_size(1)
fn main() {
    s_output = StorageBuffer(sign(0.0));
}

Checklist

• Run cargo fmt.
• Run taplo format.
• Run cargo clippy --tests. If applicable, add:
  • --target wasm32-unknown-unknown
• Run cargo xtask test to run tests.
• If this contains user-facing changes, add a CHANGELOG.md entry.