[libc-commits] [libc] [libc] Add `*_HAS_SUBNORM` to `float.h` (PR #102182)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libc

Author: Joseph Huber (jhuber6)

<details>
<summary>Changes</summary>

Summary:
These should be defined, since we provide `float.h` it will override the
Clang resource dir and not provide it.


---
Full diff: https://github.com/llvm/llvm-project/pull/102182.diff


1 Files Affected:

- (modified) libc/include/llvm-libc-macros/float-macros.h (+12) 


``````````diff
diff --git a/libc/include/llvm-libc-macros/float-macros.h b/libc/include/llvm-libc-macros/float-macros.h
index 81c1df868bf6c..a25ef60a293d3 100644
--- a/libc/include/llvm-libc-macros/float-macros.h
+++ b/libc/include/llvm-libc-macros/float-macros.h
@@ -161,6 +161,18 @@
 #define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
 #endif // LDBL_MAX_10_EXP
 
+#ifndef FLT_HAS_SUBNORM
+#define FLT_HAS_SUBNORM __FLT_HAS_DENORM__
+#endif // FLT_HAS_SUBNORM
+
+#ifndef DBL_HAS_SUBNORM
+#define DBL_HAS_SUBNORM __DBL_HAS_DENORM__
+#endif // DBL_HAS_SUBNORM
+
+#ifndef LDBL_HAS_SUBNORM
+#define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__
+#endif // LDBL_HAS_SUBNORM
+
 // TODO: Add FLT16 and FLT128 constants.
 
 #endif // LLVM_LIBC_MACROS_FLOAT_MACROS_H

``````````

</details>


https://github.com/llvm/llvm-project/pull/102182