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// groupshared.slang
//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute
//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12
//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute
//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):dxbinding(0),glbinding(0),out
#define THREAD_COUNT 4
groupshared int gA[THREAD_COUNT];
int test(int val)
{
gA[val] = val;
GroupMemoryBarrierWithGroupSync();
val = gA[val ^ 1];
/* TODO: once function-scope `static` works
static groupshared int gB[THREAD_COUNT];
gB[val] = val;
GroupMemoryBarrierWithGroupSync();
val = gB[val ^ 2];
*/
return val;
}
RWStructuredBuffer<int> gBuffer;
[numthreads(THREAD_COUNT, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
uint tid = dispatchThreadID.x;
int val = int(tid);
val = test(val);
gBuffer[tid] = val;
}
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