8359327: Incorrect AVX3Threshold results into code buffer overflows on APX targets

Reviewed-by: sviswanathan

Author: Jatin Bhateja

src/hotspot/cpu/x86/stubDeclarations_x86.hpp

@@ -239,7 +239,7 @@
                                     do_arch_blob,                       \
                                     do_arch_entry,                      \
                                     do_arch_entry_init)                 \
-  do_arch_blob(final, 31000                                             \
+  do_arch_blob(final, 33000                                             \
                WINDOWS_ONLY(+22000) ZGC_ONLY(+20000))                   \
 
 #endif // CPU_X86_STUBDECLARATIONS_HPP

src/hotspot/cpu/x86/vm_version_x86.cpp

@@ -2111,7 +2111,7 @@ bool VM_Version::is_intel_cascade_lake() {
 // has improved implementation of 64-byte load/stores and so the default
 // threshold is set to 0 for these platforms.
 int VM_Version::avx3_threshold() {
-  return (is_intel_family_core() &&
+  return (is_intel_server_family() &&
           supports_serialize() &&
           FLAG_IS_DEFAULT(AVX3Threshold)) ? 0 : AVX3Threshold;
 }