[clang] [llvm] Add cross builtins and cross HLSL function to DirectX and SPIR-V backend (PR #109180)

[Farzon Lotfi via cfe-commits]

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@@ -18639,6 +18639,21 @@ Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned BuiltinID,
         IsUnsigned ? Intrinsic::dx_uclamp : Intrinsic::dx_clamp,
         ArrayRef<Value *>{OpX, OpMin, OpMax}, nullptr, "dx.clamp");
   }
+  case Builtin::BI__builtin_hlsl_cross: {
+    Value *Op0 = EmitScalarExpr(E->getArg(0));
+    Value *Op1 = EmitScalarExpr(E->getArg(1));
+    assert(E->getArg(0)->getType()->hasFloatingRepresentation() &&
+           E->getArg(1)->getType()->hasFloatingRepresentation() &&
+           "step operands must have a float representation");
----------------
farzonl wrote:

```suggestion
           "cross operands must have a float representation");
```

https://github.com/llvm/llvm-project/pull/109180