ocaml/asmcomp/mips/selection.ml

(***********************************************************************)
(*                                                                     *)
(*                           Objective Caml                            *)
(*                                                                     *)
(*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         *)
(*                                                                     *)
(*  Copyright 1997 Institut National de Recherche en Informatique et   *)
(*  en Automatique.  All rights reserved.  This file is distributed    *)
(*  under the terms of the Q Public License version 1.0.               *)
(*                                                                     *)
(***********************************************************************)

(* $Id$ *)

(* Instruction selection for the Mips processor *)

open Misc
open Cmm
open Reg
open Arch
open Mach

class selector = object

inherit Selectgen.selector_generic

method is_immediate (n : int) = true

method select_addressing = function
    Cconst_symbol s ->
      (Ibased(s, 0), Ctuple [])
  | Cop(Cadda, [Cconst_symbol s; Cconst_int n]) ->
      (Ibased(s, n), Ctuple [])
  | Cop(Cadda, [arg; Cconst_int n]) ->
      (Iindexed n, arg)
  | Cop(Cadda, [arg1; Cop(Caddi, [arg2; Cconst_int n])]) ->
      (Iindexed n, Cop(Cadda, [arg1; arg2]))
  | arg ->
      (Iindexed 0, arg)

end

let fundecl f = (new selector)#emit_fundecl f