{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"(X86InlineAsmRegClass::xmm_reg,"}]}
            (X86InlineAsmRegClass::xmm_reg, None) => Some('x'),
        | X86(reg @ X86InlineAsmRegClass::zmm_reg) => match (reg, modifier) {
            (X86InlineAsmRegClass::ymm_reg, None) => Some('t'),