[compiler-rt] [FMV][AArch64] Add initial AT_HWCAP3 / AT_HWCAP4 support (PR #161595)

[Brad Smith via llvm-commits]

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@@ -12,10 +12,14 @@ void CONSTRUCTOR_ATTRIBUTE __init_cpu_features(void) {
 
   unsigned long hwcap = getauxval(AT_HWCAP);
   unsigned long hwcap2 = getauxval(AT_HWCAP2);
+  unsigned long hwcap3 = getauxval(AT_HWCAP3);
+  unsigned long hwcap4 = getauxval(AT_HWCAP4);
 
   __ifunc_arg_t arg;
   arg._size = sizeof(__ifunc_arg_t);
   arg._hwcap = hwcap;
   arg._hwcap2 = hwcap2;
+  arg._hwcap3 = hwcap3;
+  arg._hwcap4 = hwcap4;
   __init_cpu_features_constructor(hwcap | _IFUNC_ARG_HWCAP, &arg);
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brad0 wrote:

I'll drop the early exit as it doesn't make any sense.

https://github.com/llvm/llvm-project/pull/161595