74 lines
2.6 KiB
OCaml
74 lines
2.6 KiB
OCaml
(***********************************************************************)
|
|
(* *)
|
|
(* OCaml *)
|
|
(* *)
|
|
(* 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. *)
|
|
(* *)
|
|
(***********************************************************************)
|
|
|
|
(* Instruction selection for the Sparc processor *)
|
|
|
|
open Cmm
|
|
open Reg
|
|
open Arch
|
|
open Mach
|
|
|
|
class selector = object (self)
|
|
|
|
inherit Selectgen.selector_generic as super
|
|
|
|
method is_immediate n = (n <= 4095) && (n >= -4096)
|
|
|
|
method select_addressing chunk = 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)
|
|
|
|
method! select_operation op args =
|
|
match (op, args) with
|
|
(* For SPARC V7 multiplication, division and modulus are turned into
|
|
calls to C library routines.
|
|
For SPARC V8 and V9, use hardware multiplication and division,
|
|
but C library routine for modulus. *)
|
|
(Cmuli, _) when !arch_version = SPARC_V7 ->
|
|
(Iextcall(".umul", false), args)
|
|
| (Cdivi, _) when !arch_version = SPARC_V7 ->
|
|
(Iextcall(".div", false), args)
|
|
| (Cmodi, _) ->
|
|
(Iextcall(".rem", false), args)
|
|
| _ ->
|
|
super#select_operation op args
|
|
|
|
(* Override insert_move_args to deal correctly with floating-point
|
|
arguments being passed into pairs of integer registers. *)
|
|
method! insert_move_args arg loc stacksize =
|
|
if stacksize <> 0 then self#insert (Iop(Istackoffset stacksize)) [||] [||];
|
|
let locpos = ref 0 in
|
|
for i = 0 to Array.length arg - 1 do
|
|
let src = arg.(i) in
|
|
let dst = loc.(!locpos) in
|
|
match (src, dst) with
|
|
({typ = Float}, {typ = Int}) ->
|
|
let dst2 = loc.(!locpos + 1) in
|
|
self#insert (Iop Imove) [|src|] [|dst; dst2|];
|
|
locpos := !locpos + 2
|
|
| (_, _) ->
|
|
self#insert_move src dst;
|
|
incr locpos
|
|
done
|
|
|
|
end
|
|
|
|
let fundecl f = (new selector)#emit_fundecl f
|