[wavedrom, ,svg]
....
{reg: [
  {bits: 7, name: 'opcode', attr: ['7']},
  {bits: 5, name: 'rd', attr: ['5']},
  {bits: 3, name: 'funct3', attr: ['3']},
  {bits: 5, name: 'Addr. Offset', attr: ['5']},
  {bits: 5, name: 'rs2', attr: ['5']},
  {bits: 7, name: 'funct7', attr: ['7']},
], config: {bits: 32}}
....