wd({reg: [
{bits: 7, name: 'opcode', attr: 'SYSTEM'},
{bits: 5, name: 'rd', attr: '0'},
{bits: 3, name: 'funct3', attr: 'PRIV'},
{bits: 5, name: 'rs1', attr: 'vaddr'},
{bits: 5, name: 'rs2', attr: 'asid'},
{bits: 7, name: 'funct7', attr: 'HINVAL.VVMA'},
], config: {hspace: width, bits: 32}})