xref: /aosp_15_r20/external/skia/tests/sksl/compute/Workgroup.wgsl (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1diagnostic(off, derivative_uniformity);
2diagnostic(off, chromium.unreachable_code);
3struct CSIn {
4  @builtin(global_invocation_id) sk_GlobalInvocationID: vec3<u32>,
5};
6struct inputs {
7  in_data: array<f32>,
8};
9@group(0) @binding(0) var<storage, read> _storage0 : inputs;
10struct outputs {
11  out_data: array<f32>,
12};
13@group(0) @binding(1) var<storage, read_write> _storage1 : outputs;
14var<workgroup> shared_data: array<f32, 512>;
15fn store_vIf(i: u32, value: f32) {
16  {
17    shared_data[i] = value;
18  }
19}
20fn _skslMain(_stageIn: CSIn) {
21  {
22    let id: u32 = _stageIn.sk_GlobalInvocationID.x;
23    var rd_id: u32;
24    var wr_id: u32;
25    var mask: u32;
26    let _skTemp2 = id * 2u;
27    let _skTemp3 = id * 2u;
28    shared_data[_skTemp2] = _storage0.in_data[_skTemp3];
29    let _skTemp4 = id * 2u + 1u;
30    let _skTemp5 = id * 2u + 1u;
31    shared_data[_skTemp4] = _storage0.in_data[_skTemp5];
32    workgroupBarrier();
33    const steps: u32 = 9u;
34    {
35      var _0_step: u32 = 0u;
36      loop {
37        {
38          mask = (1u << _0_step) - 1u;
39          rd_id = ((id >> _0_step) << (_0_step + 1u)) + mask;
40          wr_id = (rd_id + 1u) + (id & mask);
41          store_vIf(wr_id, shared_data[wr_id] + shared_data[rd_id]);
42          workgroupBarrier();
43        }
44        continuing {
45          _0_step = _0_step + u32(1);
46          break if _0_step >= steps;
47        }
48      }
49    }
50    let _skTemp6 = id * 2u;
51    let _skTemp7 = id * 2u;
52    _storage1.out_data[_skTemp6] = shared_data[_skTemp7];
53    let _skTemp8 = id * 2u + 1u;
54    let _skTemp9 = id * 2u + 1u;
55    _storage1.out_data[_skTemp8] = shared_data[_skTemp9];
56  }
57}
58@compute @workgroup_size(256, 1, 1) fn main(_stageIn: CSIn) {
59  _skslMain(_stageIn);
60}
61