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|
(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Xavier Leroy, projet Gallium, INRIA Rocquencourt *)
(* Benedikt Meurer, University of Siegen *)
(* *)
(* Copyright 2013 Institut National de Recherche en Informatique et *)
(* en Automatique. *)
(* Copyright 2012 Benedikt Meurer. *)
(* *)
(* All rights reserved. This file is distributed under the terms of *)
(* the GNU Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
(* Specific operations for the ARM processor, 64-bit mode *)
open Format
let macosx = (Config.system = "macosx")
(* Machine-specific command-line options *)
let command_line_options = []
(* Addressing modes *)
type addressing_mode =
| Iindexed of int (* reg + displ *)
| Ibased of string * int (* global var + displ *)
(* We do not support the reg + shifted reg addressing mode, because
what we really need is reg + shifted reg + displ,
and this is decomposed in two instructions (reg + shifted reg -> tmp,
then addressing tmp + displ). *)
(* Specific operations *)
type cmm_label = int
(* Do not introduce a dependency to Cmm *)
type specific_operation =
| Ifar_alloc of { bytes : int; label_after_call_gc : cmm_label option;
dbginfo : Debuginfo.alloc_dbginfo }
| Ifar_intop_checkbound of { label_after_error : cmm_label option; }
| Ifar_intop_imm_checkbound of
{ bound : int; label_after_error : cmm_label option; }
| Ishiftarith of arith_operation * int
| Ishiftcheckbound of { shift : int; label_after_error : cmm_label option; }
| Ifar_shiftcheckbound of
{ shift : int; label_after_error : cmm_label option; }
| Imuladd (* multiply and add *)
| Imulsub (* multiply and subtract *)
| Inegmulf (* floating-point negate and multiply *)
| Imuladdf (* floating-point multiply and add *)
| Inegmuladdf (* floating-point negate, multiply and add *)
| Imulsubf (* floating-point multiply and subtract *)
| Inegmulsubf (* floating-point negate, multiply and subtract *)
| Isqrtf (* floating-point square root *)
| Ibswap of int (* endianness conversion *)
| Imove32 (* 32-bit integer move *)
and arith_operation =
Ishiftadd
| Ishiftsub
let spacetime_node_hole_pointer_is_live_before = function
| Ifar_alloc _ | Ifar_intop_checkbound _ | Ifar_intop_imm_checkbound _
| Ishiftarith _ | Ishiftcheckbound _ | Ifar_shiftcheckbound _ -> false
| Imuladd | Imulsub | Inegmulf | Imuladdf | Inegmuladdf | Imulsubf
| Inegmulsubf | Isqrtf | Ibswap _ | Imove32 -> false
(* Sizes, endianness *)
let big_endian = false
let size_addr = 8
let size_int = 8
let size_float = 8
let allow_unaligned_access = false
(* Behavior of division *)
let division_crashes_on_overflow = false
(* Operations on addressing modes *)
let identity_addressing = Iindexed 0
let offset_addressing addr delta =
match addr with
| Iindexed n -> Iindexed(n + delta)
| Ibased(s, n) -> Ibased(s, n + delta)
let num_args_addressing = function
| Iindexed _ -> 1
| Ibased _ -> 0
(* Printing operations and addressing modes *)
let print_addressing printreg addr ppf arg =
match addr with
| Iindexed n ->
printreg ppf arg.(0);
if n <> 0 then fprintf ppf " + %i" n
| Ibased(s, 0) ->
fprintf ppf "\"%s\"" s
| Ibased(s, n) ->
fprintf ppf "\"%s\" + %i" s n
let print_specific_operation printreg op ppf arg =
match op with
| Ifar_alloc { bytes; label_after_call_gc = _; } ->
fprintf ppf "(far) alloc %i" bytes
| Ifar_intop_checkbound _ ->
fprintf ppf "%a (far) check > %a" printreg arg.(0) printreg arg.(1)
| Ifar_intop_imm_checkbound { bound; _ } ->
fprintf ppf "%a (far) check > %i" printreg arg.(0) bound
| Ishiftarith(op, shift) ->
let op_name = function
| Ishiftadd -> "+"
| Ishiftsub -> "-" in
let shift_mark =
if shift >= 0
then sprintf "<< %i" shift
else sprintf ">> %i" (-shift) in
fprintf ppf "%a %s %a %s"
printreg arg.(0) (op_name op) printreg arg.(1) shift_mark
| Ishiftcheckbound { shift; _ } ->
fprintf ppf "check %a >> %i > %a" printreg arg.(0) shift
printreg arg.(1)
| Ifar_shiftcheckbound { shift; _ } ->
fprintf ppf
"(far) check %a >> %i > %a" printreg arg.(0) shift printreg arg.(1)
| Imuladd ->
fprintf ppf "(%a * %a) + %a"
printreg arg.(0)
printreg arg.(1)
printreg arg.(2)
| Imulsub ->
fprintf ppf "-(%a * %a) + %a"
printreg arg.(0)
printreg arg.(1)
printreg arg.(2)
| Inegmulf ->
fprintf ppf "-f (%a *f %a)"
printreg arg.(0)
printreg arg.(1)
| Imuladdf ->
fprintf ppf "%a +f (%a *f %a)"
printreg arg.(0)
printreg arg.(1)
printreg arg.(2)
| Inegmuladdf ->
fprintf ppf "(-f %a) -f (%a *f %a)"
printreg arg.(0)
printreg arg.(1)
printreg arg.(2)
| Imulsubf ->
fprintf ppf "%a -f (%a *f %a)"
printreg arg.(0)
printreg arg.(1)
printreg arg.(2)
| Inegmulsubf ->
fprintf ppf "(-f %a) +f (%a *f %a)"
printreg arg.(0)
printreg arg.(1)
printreg arg.(2)
| Isqrtf ->
fprintf ppf "sqrtf %a"
printreg arg.(0)
| Ibswap n ->
fprintf ppf "bswap%i %a" n
printreg arg.(0)
| Imove32 ->
fprintf ppf "move32 %a"
printreg arg.(0)
|
