test/buffer/storage/types/mat4x4.wgsl

[[group(0), binding(0)]]
var<storage, read> in : mat4x4<f32>;

[[group(0), binding(1)]]
var<storage, read_write> out : mat4x4<f32>;

[[stage(compute), workgroup_size(1)]]
fn main() {
  out = in;
}