[libc-commits] [libc] [llvm] [libc][math] Refactor ilogb implementation to header-only in src/__support/math folder. (PR #175504)

[Muhammad Bassiouni via libc-commits]

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@@ -0,0 +1,26 @@
+//===-- Implementation header for ilogb -------------------------*- 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_SRC___SUPPORT_MATH_ILOGB_H
+#define LLVM_LIBC_SRC___SUPPORT_MATH_ILOGB_H
+
+#include "src/__support/FPUtil/ManipulationFunctions.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+namespace math {
+
+LIBC_INLINE constexpr int ilogb(double x) { return fputil::intlogb<int>(x); }
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bassiounix wrote:

```suggestion
LIBC_INLINE static constexpr int ilogb(double x) { return fputil::intlogb<int>(x); }
```

https://github.com/llvm/llvm-project/pull/175504