Add `diffPair` stdlib function. (#2560)

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/autodiff/matrix-arithmetic-fwd.slang b/tests/autodiff/matrix-arithmetic-fwd.slang
index 7a953cef8..ee909551a 100644
--- a/tests/autodiff/matrix-arithmetic-fwd.slang
+++ b/tests/autodiff/matrix-arithmetic-fwd.slang
@@ -27,8 +27,8 @@ void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
     float3x3 da = float3x3(1.0);
 
     outputBuffer[0] = __fwd_diff(g)(
-                            DifferentialPair<float3x3>(a, da),
-                            DifferentialPair<float3x3>(b, da)).d._11; // Expect: 8
+                          diffPair(a, da),
+                          diffPair(b, da)).d._11; // Expect: 8
 
     float2x2 l = float2x2(1.0, 2.0, 3.0, 4.0);
     float2x2 r = float2x2(10.0, 11.0, 12.0, 13.0);
@@ -37,5 +37,5 @@ void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
     //float2x2 epsilon = d * 0.001f;
     //outputBuffer[1] = (h(l + epsilon, r + epsilon) - h(l - epsilon, r - epsilon)) / (epsilon[0][0] * 2.0));
 
-    outputBuffer[1] = __fwd_diff(h)(DifferentialPair<float2x2>(l, d), DifferentialPair<float2x2>(r, d)).d; // Expect 83.0
+    outputBuffer[1] = __fwd_diff(h)(diffPair(l, d), diffPair(r, d)).d; // Expect 83.0
 }