Adding some math functions and their derivatives (#2497)

1 files changed, 40 insertions, 0 deletions

diff --git a/tests/autodiff-dstdlib/dstdlib-unary.slang b/tests/autodiff-dstdlib/dstdlib-unary.slang
new file mode 100644
index 000000000..4d869996d
--- /dev/null
+++ b/tests/autodiff-dstdlib/dstdlib-unary.slang
@@ -0,0 +1,40 @@
+//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;
+
+[ForwardDifferentiable]
+float f(float x)
+{
+    return exp(x);
+}
+
+[ForwardDifferentiable]
+float g(float x)
+{
+    return sin(x);
+}
+
+[ForwardDifferentiable]
+float h(float x)
+{
+    return 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] = __fwd_diff(f)(dpa).d; // Expect: 7.389056
+        outputBuffer[2] = g(dpa.p);        // Expect: 0.909297
+        outputBuffer[3] = __fwd_diff(g)(dpa).d; // Expect: -0.416146
+        outputBuffer[4] = h(dpa.p);        // Expect: -0.416146
+        outputBuffer[5] = __fwd_diff(h)(dpa).d; // Expect: -0.909297
+    }
+}