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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 Machregs
let register_names = [
("EAX", AX); ("EBX", BX); ("ECX", CX); ("EDX", DX);
("ESI", SI); ("EDI", DI); ("EBP", BP);
("XMM0", X0); ("XMM1", X1); ("XMM2", X2); ("XMM3", X3);
("XMM4", X4); ("XMM5", X5); ("XMM6", X6); ("XMM7", X7);
("ST0", FP0)
]
let name_of_register r =
let rec rev_assoc = function
| [] -> None
| (a, b) :: rem -> if b = r then Some a else rev_assoc rem
in rev_assoc register_names
let register_by_name s =
try
Some(List.assoc (String.uppercase s) register_names)
with Not_found ->
None
let can_reserve_register r =
List.mem r Conventions1.int_callee_save_regs
|| List.mem r Conventions1.float_callee_save_regs
let mregs_of_clobber idl =
List.fold_left
(fun l c ->
match register_by_name (Camlcoq.extern_atom c) with
| Some r -> r :: l
| None -> l)
[] idl
|
