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//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-cpu -compute -shaderobj
//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-slang -compute -shaderobj
//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-slang -compute -dx12 -shaderobj
//TEST(compute, vulkan):COMPARE_COMPUTE(filecheck-buffer=CHECK):-vk -compute -shaderobj
//TEST(compute, vulkan):COMPARE_COMPUTE(filecheck-buffer=CHECK):-cuda -compute -shaderobj
//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0 0 0 0 0], stride=4):out,name outputBuffer
RWStructuredBuffer<uint> outputBuffer;
[numthreads(10, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
uint idx = dispatchThreadID.x;
if (idx < 5) {
// Test unsigned values
uint testValues[5] = {0, 1, 2, 4, 8};
uint value = testValues[idx];
uint result = firstbitlow(value);
outputBuffer[idx] = result;
} else {
// Test signed values
int testValues[5] = {-1, -2, -4, -8, 0}; // 0xFFFFFFFF, 0xFFFFFFFE, 0xFFFFFFFC, 0xFFFFFFF8, 0
int value = testValues[idx - 5];
uint result = firstbitlow(value);
outputBuffer[idx] = result;
}
}
// CHECK: FFFFFFFF
// CHECK: 0
// CHECK: 1
// CHECK: 2
// CHECK: 3
// CHECK: 0
// CHECK: 1
// CHECK: 2
// CHECK: 3
// CHECK: FFFFFFFF
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