Adding a differentiable standard library (#2465)

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/autodiff/dstdlib.slang b/tests/autodiff/dstdlib.slang
new file mode 100644
index 000000000..6c7ecffbe
--- /dev/null
+++ b/tests/autodiff/dstdlib.slang
@@ -0,0 +1,37 @@
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+typedef __DifferentialPair<float> dpfloat;
+
+__differentiate_jvp float f(float x)
+{
+    return dstd.exp(x);
+}
+
+__differentiate_jvp float g(float x)
+{
+    return dstd.sin(x);
+}
+
+__differentiate_jvp float h(float x)
+{
+    return dstd.cos(x);
+}
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
+{
+    {
+        dpfloat dpa = dpfloat(2.0, 1.0);
+
+        outputBuffer[0] = f(dpa.p());        // Expect: 7.389056
+        outputBuffer[1] = __jvp(f)(dpa).d(); // Expect: 7.389056
+        outputBuffer[2] = g(dpa.p());        // Expect: 0.909297 
+        outputBuffer[3] = __jvp(g)(dpa).d(); // Expect: -0.416146
+        outputBuffer[4] = h(dpa.p());        // Expect: -0.416146
+        outputBuffer[5] = __jvp(h)(dpa).d(); // Expect: -0.909297 
+    }
+}
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