Solution
--------

Add these machine descriptions to spim1.md file.



(define_insn "subsi3"
        [(set (match_operand:SI 0 "register_operand" "=r")
              (minus:SI (match_operand:SI 1 "register_operand" "r")
                       (match_operand:SI 2 "register_operand" "r"))
         )]
        ""
        "sub \\t%0, %1, %2"
)




(define_insn "ashlsi3"
        [(set (match_operand:SI 0 "register_operand" "=r,r")
              (ashift:SI (match_operand:SI 1 "register_operand" "r,r")
                       (match_operand:SI 2 "nonmemory_operand" "r,J"))
         )]
        ""
       "@
         sllv \\t%0, %1, %2
         sll \\t%0, %1, %c2"
)