1 files changed, 94 insertions, 0 deletions
diff --git a/mips/mips_extras.lem b/mips/mips_extras.lem
new file mode 100644
index 00000000..920277f6
--- /dev/null
+++ b/mips/mips_extras.lem
@@ -0,0 +1,94 @@
+open import Pervasives
+open import Pervasives_extra
+open import Sail_instr_kinds
+open import Sail_values
+open import Sail_operators
+open import Prompt_monad
+open import Prompt
+
+val MEMr             : forall 'regval 'a 'b 'e. Bitvector 'a, Bitvector 'b => 'a -> integer -> monad 'regval 'b 'e
+val MEMr_reserve     : forall 'regval 'a 'b 'e. Bitvector 'a, Bitvector 'b => 'a -> integer -> monad 'regval 'b 'e
+val MEMr_tag         : forall 'regval 'a 'b 'e. Bitvector 'a, Bitvector 'b => 'a -> integer -> monad 'regval (bool * 'b) 'e
+val MEMr_tag_reserve : forall 'regval 'a 'b 'e. Bitvector 'a, Bitvector 'b => 'a -> integer -> monad 'regval (bool * 'b) 'e
+
+let MEMr addr size             = read_mem Read_plain addr size
+let MEMr_reserve addr size     = read_mem Read_reserve addr size
+
+let MEMr_tag addr size =
+  read_mem Read_plain addr size >>= fun v ->
+  read_tag addr >>= fun t ->
+  return (bool_of_bitU t, v)
+
+let MEMr_tag_reserve addr size =
+  read_mem Read_plain addr size >>= fun v ->
+  read_tag addr >>= fun t ->
+  return (bool_of_bitU t, v)
+
+
+val MEMea                 : forall 'regval 'a 'e. Bitvector 'a => 'a -> integer -> monad 'regval unit 'e
+val MEMea_conditional     : forall 'regval 'a 'e. Bitvector 'a => 'a -> integer -> monad 'regval unit 'e
+val MEMea_tag             : forall 'regval 'a 'e. Bitvector 'a => 'a -> integer -> monad 'regval unit 'e
+val MEMea_tag_conditional : forall 'regval 'a 'e. Bitvector 'a => 'a -> integer -> monad 'regval unit 'e
+
+let MEMea addr size                 = write_mem_ea Write_plain addr size
+let MEMea_conditional addr size     = write_mem_ea Write_conditional addr size
+
+let MEMea_tag addr size             = write_mem_ea Write_plain addr size
+let MEMea_tag_conditional addr size = write_mem_ea Write_conditional addr size
+
+
+val MEMval                 : forall 'regval 'a 'b 'e. Bitvector 'a, Bitvector 'b => 'a -> integer -> 'b -> monad 'regval unit 'e
+val MEMval_conditional     : forall 'regval 'a 'b 'e. Bitvector 'a, Bitvector 'b => 'a -> integer -> 'b -> monad 'regval bool 'e
+val MEMval_tag             : forall 'regval 'a 'b 'e. Bitvector 'a, Bitvector 'b => 'a -> integer -> bool -> 'b -> monad 'regval unit 'e
+val MEMval_tag_conditional : forall 'regval 'a 'b 'e. Bitvector 'a, Bitvector 'b => 'a -> integer -> bool -> 'b -> monad 'regval bool 'e
+
+let MEMval _ size v                   = write_mem_val v >>= fun _ -> return ()
+let MEMval_conditional _ size v       = write_mem_val v >>= fun b -> return (if b then true else false)
+let MEMval_tag  _ size t v            = write_mem_val v >>= fun _ -> write_tag_val (bitU_of_bool t) >>= fun _ -> return ()
+let MEMval_tag_conditional _ size t v = write_mem_val v >>= fun b -> write_tag_val (bitU_of_bool t) >>= fun _ -> return (if b then true else false)
+
+val MEM_sync  : forall 'regval 'e. unit -> monad 'regval unit 'e
+
+let MEM_sync () = barrier Barrier_MIPS_SYNC
+
+(* Some wrappers copied from aarch64_extras *)
+(* TODO: Harmonise into a common library *)
+
+let get_slice_int_bl len n lo =
+  (* TODO: Is this the intended behaviour? *)
+  let hi = lo + len - 1 in
+  let bits = bits_of_int (hi + 1) n in
+  get_bits false bits hi lo
+
+val get_slice_int : forall 'a. Bitvector 'a => integer -> integer -> integer -> 'a
+let get_slice_int len n lo = of_bits (get_slice_int_bl len n lo)
+
+let write_ram _ size _ addr data =
+  MEMea addr size >>
+  MEMval addr size data
+
+let read_ram _ size _ addr = MEMr addr size
+
+let sign_extend bits len = exts_bv len bits
+let zero_extend bits len = extz_bv len bits
+
+let shift_bits_left v n = shiftl_bv v (unsigned n)
+let shift_bits_right v n = shiftr_bv v (unsigned n)
+let shift_bits_right_arith v n = arith_shiftr_bv v (unsigned n)
+
+(* TODO: These could be monadic instead of hardcoded *)
+let internal_pick vs = head vs
+let undefined_string () = ""
+let undefined_unit () = ()
+let undefined_int () = (0:ii)
+let undefined_bool () = false
+val undefined_vector : forall 'a. integer -> 'a -> list 'a
+let undefined_vector len u = repeat [u] len
+val undefined_bitvector : forall 'a. Bitvector 'a => integer -> 'a
+let undefined_bitvector len = of_bits (repeat [B0] len)
+let undefined_bits len = undefined_bitvector len
+let undefined_bit () = B0
+let undefined_real () = realFromFrac 0 1
+let undefined_range i j = i
+let undefined_atom i = i
+let undefined_nat () = (0:ii)