[clang] Adding `asuint` implementation to hlsl (PR #107292)

[Justin Bogner via cfe-commits]

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@@ -0,0 +1,35 @@
+//===----- hlsl_intrinsics.h - HLSL definitions for intrinsics ----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _HLSL_HLSL_DETAILS_H_
+#define _HLSL_HLSL_DETAILS_H_
+
+namespace __details {
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bogner wrote:

If we're trying to mimic libc++ style this would be `__detail` rather than `__details`

https://github.com/llvm/llvm-project/pull/107292