syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"ymm8:"}]}
source_snippet:         ymm8: ymm_reg = ["ymm8"] % x86_64_only,
context_before:         ymm7: ymm_reg = ["ymm7"],
context_after:         ymm9: ymm_reg = ["ymm9"] % x86_64_only,