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(* *********************************************************************)
(* *)
(* The Compcert verified compiler *)
(* *)
(* Xavier Leroy, INRIA Paris-Rocquencourt *)
(* *)
(* Copyright Institut National de Recherche en Informatique et en *)
(* Automatique. All rights reserved. This file is distributed *)
(* under the terms of the INRIA Non-Commercial License Agreement. *)
(* *)
(* *********************************************************************)
(** Auxiliary functions on machine registers *)
open Camlcoq
open Machregs
let register_names : (mreg, string) Hashtbl.t = Hashtbl.create 31
let _ =
List.iter
(fun (s, r) -> Hashtbl.add register_names r (camlstring_of_coqstring s))
Machregs.register_names
let is_scratch_register s = s = "R0" || s = "r0"
let name_of_register r =
try Some (Hashtbl.find register_names r) with Not_found -> None
let register_by_name s =
Machregs.register_by_name (coqstring_uppercase_ascii_of_camlstring s)
let can_reserve_register r =
List.mem r Conventions1.int_callee_save_regs
|| List.mem r Conventions1.float_callee_save_regs
let class_of_type = function
| AST.Tint | AST.Tlong -> 0
| AST.Tfloat | AST.Tsingle -> 1
| AST.Tany32 | AST.Tany64 -> assert false
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