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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
//DISABLE_TEST:SIMPLE(filecheck=CHK):-target glsl -stage compute -entry computeMain -report-checkpoint-intermediates
//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;
//CHK: note: checkpointing context of 24 bytes associated with function: 'test_simple_loop'
[Differentiable]
float test_simple_loop(float y)
{
//CHK: note: 20 bytes (FixedArray<float, 5> ) used to checkpoint the following item:
float t = y;
//CHK: note: 4 bytes (int32_t) used for a loop counter here:
for (int i = 0; i < 3; i++)
{
t = t * t;
}
return t;
}
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
{
dpfloat dpa = dpfloat(1.0, 0.0);
__bwd_diff(test_simple_loop)(dpa, 1.0f);
outputBuffer[0] = dpa.d; // Expect: 8.0
}
{
dpfloat dpa = dpfloat(0.4, 0.0);
__bwd_diff(test_simple_loop)(dpa, 1.0f);
outputBuffer[1] = dpa.d; // Expect: 0.0131072
}
}
//CHK-NOT: note
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