syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"X86_64"}]}
source_snippet:             X86_64 => "penryn",
context_before:             I386 | I686 => "penryn",
context_after:             // Note: `core-avx2` is slightly more advanced than `x86_64h`, see