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