{reg: [
    {bits: 7, name: 11,       attr: 'Opcode: Custom-0'},
    {bits: 5, name: 'rd',     attr: 'Destination'},
    {bits: 3, name: 'funct3', type: 1},
    {bits: 5, name: 'rs1',    attr: 'Source 1'},
    {bits: 5, name: 'rs2',    attr: 'Source 2'},
    {bits: 7, name: 'funct7', type: 1}
]}