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instruct.ml
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(***********************************************************************)
(* *)
(* OCaml *)
(* *)
(* 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. *)
(* *)
(***********************************************************************)
open Lambda
type compilation_env =
{ ce_stack: int Ident.tbl;
ce_heap: int Ident.tbl;
ce_rec: int Ident.tbl }
type debug_event =
{ mutable ev_pos: int; (* Position in bytecode *)
ev_module: string; (* Name of defining module *)
ev_loc: Location.t; (* Location in source file *)
ev_kind: debug_event_kind; (* Before/after event *)
ev_info: debug_event_info; (* Extra information *)
ev_typenv: Env.summary; (* Typing environment *)
ev_typsubst: Subst.t; (* Substitution over types *)
ev_compenv: compilation_env; (* Compilation environment *)
ev_stacksize: int; (* Size of stack frame *)
ev_repr: debug_event_repr } (* Position of the representative *)
and debug_event_kind =
Event_before
| Event_after of Types.type_expr
| Event_pseudo
and debug_event_info =
Event_function
| Event_return of int
| Event_other
and debug_event_repr =
Event_none
| Event_parent of int ref
| Event_child of int ref
type label = int (* Symbolic code labels *)
type instruction =
Klabel of label
| Kacc of int
| Kenvacc of int
| Kpush
| Kpop of int
| Kassign of int
| Kpush_retaddr of label
| Kapply of int (* number of arguments *)
| Kappterm of int * int (* number of arguments, slot size *)
| Kreturn of int (* slot size *)
| Krestart
| Kgrab of int (* number of arguments *)
| Kclosure of label * int
| Kclosurerec of label list * int
| Koffsetclosure of int
| Kgetglobal of Ident.t
| Ksetglobal of Ident.t
| Kconst of structured_constant
| Kmakeblock of int * int (* size, tag *)
| Kmakefloatblock of int
| Kgetfield of int
| Ksetfield of int
| Kgetfloatfield of int
| Ksetfloatfield of int
| Kvectlength
| Kgetvectitem
| Ksetvectitem
| Kgetstringchar
| Ksetstringchar
| Kbranch of label
| Kbranchif of label
| Kbranchifnot of label
| Kstrictbranchif of label
| Kstrictbranchifnot of label
| Kswitch of label array * label array
| Kboolnot
| Kpushtrap of label
| Kpoptrap
| Kraise of raise_kind
| Kcheck_signals
| Kccall of string * int
| Knegint | Kaddint | Ksubint | Kmulint | Kdivint | Kmodint
| Kandint | Korint | Kxorint | Klslint | Klsrint | Kasrint
| Kintcomp of comparison
| Koffsetint of int
| Koffsetref of int
| Kisint
| Kisout
| Kgetmethod
| Kgetpubmet of int
| Kgetdynmet
| Kevent of debug_event
| Kstop
let immed_min = -0x40000000
and immed_max = 0x3FFFFFFF
(* Actually the abstract machine accomodates -0x80000000 to 0x7FFFFFFF,
but these numbers overflow the OCaml type int if the compiler runs on
a 32-bit processor. *)