[libc-commits] [libc] [libc][math] implement `signbit` (PR #97791)

[via libc-commits]

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@@ -0,0 +1,20 @@
+//===-- Definition of macros from math.h ----------------------------------===//
+//
+// 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_MACROS_GENERIC_MATH_MACROS_H
+#define LLVM_LIBC_MACROS_GENERIC_MATH_MACROS_H
+
+#define isfinite(x) __builtin_isfinite(x)
+#define isinf(x) __builtin_isinf(x)
+#define isnan(x) __builtin_isnan(x)
+#define signbit(x) \
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lntue wrote:

Use `_Generic` for type dispatch, similar to: https://github.com/llvm/llvm-project/blob/main/libc/include/llvm-libc-macros/stdbit-macros.h#L217

https://github.com/llvm/llvm-project/pull/97791