[libc][math] Refactor asinhf16 implementation to header-only in src/__support/math folder. (#150849)

Part of #147386

in preparation for: https://discourse.llvm.org/t/rfc-make-clang-builtin-math-functions-constexpr-with-llvm-libc-to-support-c-23-constexpr-math-functions/86450

libc/shared/math.h

@@ -21,6 +21,7 @@
 #include "math/asinf.h"
 #include "math/asinf16.h"
 #include "math/asinhf.h"
+#include "math/asinhf16.h"
 #include "math/erff.h"
 #include "math/exp.h"
 #include "math/exp10.h"

libc/shared/math/asinf16.h

@@ -25,4 +25,4 @@ using math::asinf16;
 
 #endif // LIBC_TYPES_HAS_FLOAT16
 
-#endif // LLVM_LIBC_SHARED_MATH_ASINF_H
+#endif // LLVM_LIBC_SHARED_MATH_ASINF16_H

libc/shared/math/asinhf16.h

@@ -0,0 +1,28 @@
+//===-- Shared asinhf16 function --------------------------------*- C++ -*-===//
+//
+// 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 LLVM_LIBC_SHARED_MATH_ASINHF16_H
+#define LLVM_LIBC_SHARED_MATH_ASINHF16_H
+
+#include "shared/libc_common.h"
+
+#ifdef LIBC_TYPES_HAS_FLOAT16
+
+#include "src/__support/math/asinhf16.h"
+
+namespace LIBC_NAMESPACE_DECL {
+namespace shared {
+
+using math::asinhf16;
+
+} // namespace shared
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LIBC_TYPES_HAS_FLOAT16
+
+#endif // LLVM_LIBC_SHARED_MATH_ASINHF16_H