.*: Assembler messages:
.*: Error: illegal operands `c.addw'
.*: Error: illegal operands `c.addw ,'
.*: Error: illegal operands `c.addw ,x8'
.*: Error: illegal operands `c.addw x8,'
.*: Error: illegal operands `c.addw ,,'
.*: Error: illegal operands `c.addw x7,x8'
.*: Error: illegal operands `c.addw x16,x8'
.*: Error: illegal operands `c.addw 3,x8'
.*: Error: illegal operands `c.addw x8,x7'
.*: Error: illegal operands `c.addw x8,x16'
.*: Error: illegal operands `c.addw x8,3'
