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|
(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 1996 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. *)
(* *)
(***********************************************************************)
(* $Id$ *)
(* Pretty-printing of C-- code *)
open Format
open Cmm
let machtype_component ppf = function
| Addr -> fprintf ppf "addr"
| Int -> fprintf ppf "int"
| Float -> fprintf ppf "float"
let machtype ppf mty =
match Array.length mty with
| 0 -> fprintf ppf "unit"
| n -> machtype_component ppf mty.(0);
for i = 1 to n-1 do
fprintf ppf "*%a" machtype_component mty.(i)
done
let comparison = function
| Ceq -> "=="
| Cne -> "!="
| Clt -> "<"
| Cle -> "<="
| Cgt -> ">"
| Cge -> ">="
let chunk = function
| Byte_unsigned -> "unsigned int8"
| Byte_signed -> "signed int8"
| Sixteen_unsigned -> "unsigned int16"
| Sixteen_signed -> "signed int16"
| Thirtytwo_unsigned -> "unsigned int32"
| Thirtytwo_signed -> "signed int32"
| Word -> ""
| Single -> "float32"
| Double -> "float64"
| Double_u -> "float64u"
let operation = function
| Capply ty -> "app"
| Cextcall(lbl, ty, alloc) -> Printf.sprintf "extcall \"%s\"" lbl
| Cload Word -> "load"
| Cload c -> Printf.sprintf "load %s" (chunk c)
| Calloc -> "alloc"
| Cstore Word -> "store"
| Cstore c -> Printf.sprintf "store %s" (chunk c)
| Caddi -> "+"
| Csubi -> "-"
| Cmuli -> "*"
| Cdivi -> "/"
| Cmodi -> "mod"
| Cand -> "and"
| Cor -> "or"
| Cxor -> "xor"
| Clsl -> "<<"
| Clsr -> ">>u"
| Casr -> ">>s"
| Ccmpi c -> comparison c
| Cadda -> "+a"
| Csuba -> "-a"
| Ccmpa c -> Printf.sprintf "%sa" (comparison c)
| Cnegf -> "~f"
| Cabsf -> "absf"
| Caddf -> "+f"
| Csubf -> "-f"
| Cmulf -> "*f"
| Cdivf -> "/f"
| Cfloatofint -> "floatofint"
| Cintoffloat -> "intoffloat"
| Ccmpf c -> Printf.sprintf "%sf" (comparison c)
| Craise -> "raise"
| Ccheckbound -> "checkbound"
let rec expr ppf = function
| Cconst_int n -> fprintf ppf "%i" n
| Cconst_natint n -> fprintf ppf "%s" (Nativeint.to_string n)
| Cconst_float s -> fprintf ppf "%s" s
| Cconst_symbol s -> fprintf ppf "\"%s\"" s
| Cconst_pointer n -> fprintf ppf "%ia" n
| Cconst_natpointer n -> fprintf ppf "%sa" (Nativeint.to_string n)
| Cvar id -> Ident.print ppf id
| Clet(id, def, (Clet(_, _, _) as body)) ->
let print_binding id ppf def =
fprintf ppf "@[<2>%a@ %a@]" Ident.print id expr def in
let rec in_part ppf = function
| Clet(id, def, body) ->
fprintf ppf "@ %a" (print_binding id) def;
in_part ppf body
| exp -> exp in
fprintf ppf "@[<2>(let@ @[<1>(%a" (print_binding id) def;
let exp = in_part ppf body in
fprintf ppf ")@]@ %a)@]" sequence exp
| Clet(id, def, body) ->
fprintf ppf
"@[<2>(let@ @[<2>%a@ %a@]@ %a)@]"
Ident.print id expr def sequence body
| Cassign(id, exp) ->
fprintf ppf "@[<2>(assign @[<2>%a@ %a@])@]" Ident.print id expr exp
| Ctuple el ->
let tuple ppf el =
let first = ref true in
List.iter
(fun e ->
if !first then first := false else fprintf ppf "@ ";
expr ppf e)
el in
fprintf ppf "@[<1>[%a]@]" tuple el
| Cop(op, el) ->
fprintf ppf "@[<2>(%s" (operation op);
List.iter (fun e -> fprintf ppf "@ %a" expr e) el;
begin match op with
| Capply mty -> fprintf ppf "@ %a" machtype mty
| Cextcall(_, mty, _) -> fprintf ppf "@ %a" machtype mty
| _ -> ()
end;
fprintf ppf ")@]"
| Csequence(e1, e2) ->
fprintf ppf "@[<2>(seq@ %a@ %a)@]" sequence e1 sequence e2
| Cifthenelse(e1, e2, e3) ->
fprintf ppf "@[<2>(if@ %a@ %a@ %a)@]" expr e1 expr e2 expr e3
| Cswitch(e1, index, cases) ->
let print_case i ppf =
for j = 0 to Array.length index - 1 do
if index.(j) = i then fprintf ppf "case %i:" j
done in
let print_cases ppf =
for i = 0 to Array.length cases - 1 do
fprintf ppf "@ @[<2>%t@ %a@]" (print_case i) sequence cases.(i)
done in
fprintf ppf "@[<v 0>@[<2>(switch@ %a@ @]%t)@]" expr e1 print_cases
| Cloop e ->
fprintf ppf "@[<2>(loop@ %a)@]" sequence e
| Ccatch(i, ids, e1, e2) ->
fprintf ppf
"@[<2>(catch@ %a@;<1 -2>with(%d%a)@ %a)@]"
sequence e1 i
(fun ppf ids ->
List.iter
(fun id -> fprintf ppf " %a" Ident.print id)
ids) ids
sequence e2
| Cexit (i, el) ->
fprintf ppf "@[<2>(exit %d" i ;
List.iter (fun e -> fprintf ppf "@ %a" expr e) el;
fprintf ppf ")@]"
| Ctrywith(e1, id, e2) ->
fprintf ppf "@[<2>(try@ %a@;<1 -2>with@ %a@ %a)@]"
sequence e1 Ident.print id sequence e2
and sequence ppf = function
| Csequence(e1, e2) -> fprintf ppf "%a@ %a" sequence e1 sequence e2
| e -> expression ppf e
and expression ppf e = fprintf ppf "%a" expr e
let fundecl ppf f =
let print_cases ppf cases =
let first = ref true in
List.iter
(fun (id, ty) ->
if !first then first := false else fprintf ppf "@ ";
fprintf ppf "%a: %a" Ident.print id machtype ty)
cases in
fprintf ppf "@[<1>(function %s@;<1 4>@[<1>(%a)@]@ @[%a@])@]@."
f.fun_name print_cases f.fun_args sequence f.fun_body
let data_item ppf = function
| Cdefine_symbol s -> fprintf ppf "\"%s\":" s
| Cdefine_label l -> fprintf ppf "L%i:" l
| Cint8 n -> fprintf ppf "byte %i" n
| Cint16 n -> fprintf ppf "int16 %i" n
| Cint32 n -> fprintf ppf "int32 %s" (Nativeint.to_string n)
| Cint n -> fprintf ppf "int %s" (Nativeint.to_string n)
| Csingle f -> fprintf ppf "single %s" f
| Cdouble f -> fprintf ppf "double %s" f
| Csymbol_address s -> fprintf ppf "addr \"%s\"" s
| Clabel_address l -> fprintf ppf "addr L%i" l
| Cstring s -> fprintf ppf "string \"%s\"" s
| Cskip n -> fprintf ppf "skip %i" n
| Calign n -> fprintf ppf "align %i" n
let data ppf dl =
let items ppf = List.iter (fun d -> fprintf ppf "@ %a" data_item d) dl in
fprintf ppf "@[<hv 1>(data%t)@]" items
let phrase ppf = function
| Cfunction f -> fundecl ppf f
| Cdata dl -> data ppf dl
|
