[clang] [llvm] [HLSL] Implementation of dot intrinsic (PR #81190)

[Chris B via cfe-commits]

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@@ -179,6 +179,98 @@ double3 cos(double3);
 _HLSL_BUILTIN_ALIAS(__builtin_elementwise_cos)
 double4 cos(double4);
 
+//===----------------------------------------------------------------------===//
+// dot product builtins
+//===----------------------------------------------------------------------===//
+_HLSL_16BIT_AVAILABILITY(shadermodel, 6.2)
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llvm-beanz wrote:

Can you add a doxygen comment above the first declaration?

https://github.com/llvm/llvm-project/pull/81190