[libc-commits] [libc] [libc][math] Implement `issignaling` and `iscanonical` macro. (PR #111403)

[Shourya Goel via libc-commits]

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@@ -11,6 +11,19 @@
 
 #include "math-macros.h"
 
+#ifndef __cplusplus
+#define issignaling(x)                                                         \
+  _Generic((x),                                                                \
+      float: issignalingf,                                                     \
+      double: issignaling,                                                     \
+      long double: issignalingl)(x)
+#define iscanonical(x)                                                         \
+  _Generic((x),                                                                \
+      float: iscanonicalf,                                                     \
+      double: iscanonical,                                                     \
+      long double: iscanonicall)(x)
+#endif
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Sh0g0-1758 wrote:

This macro is defined in C23 and while C++ does not have anything equivalent, it will most likely be `std::issignaling` as a template function. Also, the C++ header cmath in libc++ will most likely undef all the macro defs. So the tests in include should only test the function under C for now. 

https://github.com/llvm/llvm-project/pull/111403