[libc] [llvm] [libc][fenv] Refactor x86 fenv implementations to make it work for various fenv_t. (PR #165015)

[James Y Knight via llvm-commits]

================
@@ -130,5 +130,11 @@
       "value": true,
       "doc": "Add nullptr checks in the library's implementations to some functions for which passing nullptr is undefined behavior."
     }
+  },
+  "fenv": {
+    "LIBC_CONF_TRAP_ON_RAISE_FP_EXCEPT": {
----------------
jyknight wrote:

Should this be on by default?

https://github.com/llvm/llvm-project/pull/165015