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// Copyright 2019 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "tests/DawnTest.h"
#include "utils/WGPUHelpers.h"
#include <array>
class ComputeSharedMemoryTests : public DawnTest {
public:
static constexpr uint32_t kInstances = 11;
void BasicTest(const char* shader);
};
void ComputeSharedMemoryTests::BasicTest(const char* shader) {
// Set up shader and pipeline
auto module = utils::CreateShaderModule(device, shader);
wgpu::ComputePipelineDescriptor csDesc;
csDesc.compute.module = module;
csDesc.compute.entryPoint = "main";
wgpu::ComputePipeline pipeline = device.CreateComputePipeline(&csDesc);
// Set up dst storage buffer
wgpu::BufferDescriptor dstDesc;
dstDesc.size = sizeof(uint32_t);
dstDesc.usage =
wgpu::BufferUsage::Storage | wgpu::BufferUsage::CopySrc | wgpu::BufferUsage::CopyDst;
wgpu::Buffer dst = device.CreateBuffer(&dstDesc);
const uint32_t zero = 0;
queue.WriteBuffer(dst, 0, &zero, sizeof(zero));
// Set up bind group and issue dispatch
wgpu::BindGroup bindGroup = utils::MakeBindGroup(device, pipeline.GetBindGroupLayout(0),
{
{0, dst, 0, sizeof(uint32_t)},
});
wgpu::CommandBuffer commands;
{
wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
wgpu::ComputePassEncoder pass = encoder.BeginComputePass();
pass.SetPipeline(pipeline);
pass.SetBindGroup(0, bindGroup);
pass.Dispatch(1);
pass.EndPass();
commands = encoder.Finish();
}
queue.Submit(1, &commands);
const uint32_t expected = kInstances;
EXPECT_BUFFER_U32_RANGE_EQ(&expected, dst, 0, 1);
}
// Basic shared memory test
TEST_P(ComputeSharedMemoryTests, Basic) {
BasicTest(R"(
let kTileSize : u32 = 4u;
let kInstances : u32 = 11u;
[[block]] struct Dst {
x : u32;
};
[[group(0), binding(0)]] var<storage, write> dst : Dst;
var<workgroup> tmp : u32;
[[stage(compute), workgroup_size(4,4,1)]]
fn main([[builtin(local_invocation_id)]] LocalInvocationID : vec3<u32>) {
let index : u32 = LocalInvocationID.y * kTileSize + LocalInvocationID.x;
if (index == 0u) {
tmp = 0u;
}
workgroupBarrier();
for (var i : u32 = 0u; i < kInstances; i = i + 1u) {
if (i == index) {
tmp = tmp + 1u;
}
workgroupBarrier();
}
if (index == 0u) {
dst.x = tmp;
}
})");
}
DAWN_INSTANTIATE_TEST(ComputeSharedMemoryTests,
D3D12Backend(),
MetalBackend(),
OpenGLBackend(),
OpenGLESBackend(),
VulkanBackend());