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// Tests automatic synthesis of Differential type requirement.
//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:-cuda -compute -shaderobj -output-using-type
//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
struct A : IDifferentiable
{
float x;
float y;
[__unsafeForceInlineEarly]
static Differential dzero()
{
Differential b = {0.0, float.dzero()};
return b;
}
[__unsafeForceInlineEarly]
static Differential dadd(Differential a, Differential b)
{
Differential o = {a.x + b.x, 0.0};
return o;
}
[__unsafeForceInlineEarly]
__generic<T : __BuiltinRealType>
static Differential dmul(T a, Differential b)
{
Differential o = { __realCast<float, T>(a * __realCast<T, float>(b.x)), 0.0};
return o;
}
};
typedef DifferentialPair<A> dpA;
[ForwardDifferentiable]
A f(A a)
{
A aout;
aout.y = 2 * a.x;
aout.x = 5 * a.x;
return aout;
}
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
{
A a = {1.0, 2.0};
A.Differential b = {0.2};
dpA dpa = dpA(a, b);
outputBuffer[0] = __fwd_diff(f)(dpa).d.x; // Expect: 1
}
}
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