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//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj
//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
typedef DifferentialPair<float> dpfloat;
typedef float.Differential dfloat;
struct P
{
bool terminated;
bool isTerminated() { return terminated; }
bool isHit() { return !terminated; }
}
[BackwardDifferentiable]
float test_simple_while(float y)
{
float t = y;
P p;
p.terminated = false;
int i = 2;
[MaxIters(3)]
while (!p.isTerminated())
{
i++;
if (p.isHit())
{
if (p.isTerminated()) break;
t = t * t;
p.terminated = (i < 5);
}
else
{
t = t + 1.0;
}
}
return t;
}
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
{
dpfloat dpa = dpfloat(1.0, 0.0);
__bwd_diff(test_simple_while)(dpa, 1.0f);
outputBuffer[0] = dpa.d; // Expect: 8.0
}
}
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