aboutsummaryrefslogtreecommitdiffhomepage
path: root/kernel/cbytecodes.mli
blob: c24b5a5301c985a6833a49a86f43899e68c048d9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
open Names
open Term

type tag = int 

val id_tag : tag
val iddef_tag : tag
val ind_tag : tag
val fix_tag : tag
val switch_tag : tag
val cofix_tag : tag
val cofix_evaluated_tag : tag

type structured_constant =
  | Const_sorts of sorts
  | Const_ind of inductive
  | Const_b0 of tag                
  | Const_bn of tag * structured_constant array

type reloc_table = (tag * int) array 

type annot_switch = 
   {ci : case_info; rtbl : reloc_table; tailcall : bool}

module Label : 
  sig
    type t = int
    val no : t
    val create : unit -> t
    val reset_label_counter : unit -> unit
  end 

type instruction =
  | Klabel of Label.t
  | Kacc of int
  | Kenvacc of int
  | Koffsetclosure of int
  | Kpush
  | Kpop of int
  | Kpush_retaddr of Label.t
  | Kapply of int                       (*  number of arguments *)
  | Kappterm of int * int               (* number of arguments, slot size *)
  | Kreturn of int                      (* slot size *)
  | Kjump
  | Krestart
  | Kgrab of int                        (* number of arguments *)
  | Kgrabrec of int                     (* rec arg *)
  | Kclosure of Label.t * int           (* label, number of free variables *)
  | Kclosurerec of int * int * Label.t array * Label.t array 
                   (* nb fv, init, lbl types, lbl bodies *)
  | Kclosurecofix of int * int * Label.t array * Label.t array 
                   (* nb fv, init, lbl types, lbl bodies *)
  | Kgetglobal of constant
  | Kconst of structured_constant
  | Kmakeblock of int * tag             (* size, tag *)
  | Kmakeprod 
  | Kmakeswitchblock of Label.t * Label.t * annot_switch * int
  | Kswitch of Label.t array * Label.t array (* consts,blocks *)
  | Kpushfields of int 
  | Kfield of int
  | Ksetfield of int
  | Kstop
  | Ksequence of bytecodes * bytecodes
(* spiwack: instructions concerning integers *)
  | Kbranch of Label.t                  (* jump to label, is it needed ? *)
  | Kaddint31                           (* adds the int31 in the accu 
                                           and the one ontop of the stack *)
  | Kaddcint31                          (* makes the sum and keeps the carry *)
  | Kaddcarrycint31                     (* sum +1, keeps the carry *)
  | Ksubint31                           (* subtraction modulo *)
  | Ksubcint31                          (* subtraction, keeps the carry *)
  | Ksubcarrycint31                     (* subtraction -1, keeps the carry *)
  | Kmulint31                           (* multiplication modulo *)
  | Kmulcint31                          (* multiplication, result in two
					   int31, for exact computation *)
  | Kdiv21int31                         (* divides a double size integer
                                           (represented by an int31 in the 
					   accumulator and one on the top of 
					   the stack) by an int31. The result
					   is a pair of the quotient and the 
					   rest.
					   If the divisor is 0, it returns
					   0. *)
  | Kdivint31                           (* euclidian division (returns a pair
					   quotient,rest) *)
  | Kaddmuldivint31                     (* generic operation for shifting and
					   cycling. Takes 3 int31 i j and s,
					   and returns x*2^s+y/(2^(31-s) *)
  | Kcompareint31                        (* unsigned comparison of int31
					   cf COMPAREINT31 in 
					   kernel/byterun/coq_interp.c
					   for more info *)
  | Khead0int31                         (* Give the numbers of 0 in head of a in31*)
  | Ktail0int31                         (* Give the numbers of 0 in tail of a in31 
                                           ie low bits *)
  | Kisconst of Label.t                 (* conditional jump *)
  | Kareconst of int*Label.t            (* conditional jump *)
  | Kcompint31                          (* dynamic compilation of int31 *)
  | Kdecompint31                        (* dynamix decompilation of int31 *)
(* /spiwack *)


and bytecodes = instruction list

type fv_elem = FVnamed of identifier | FVrel of int

type fv = fv_elem array


(* spiwack: this exception is expected to be raised by function expecting
            closed terms. *)
exception NotClosed

(*spiwack: both type have been moved from Cbytegen because I needed then
  for the retroknowledge *)
type vm_env = {
    size : int;              (* longueur de la liste [n] *)
    fv_rev : fv_elem list    (* [fvn; ... ;fv1] *)
  }    
   
   
type comp_env = { 
    nb_stack : int;              (* nbre de variables sur la pile          *)
    in_stack : int list;         (* position dans la pile                  *)
    nb_rec : int;                (* nbre de fonctions mutuellement         *)
                                 (* recursives =  nbr                      *)
    pos_rec  : instruction list; (* instruction d'acces pour les variables *)
                                 (*  de point fix ou de cofix              *)
    offset : int;                 
    in_env : vm_env ref 
  } 

val draw_instr : bytecodes -> unit



(*spiwack: moved this here because I needed it for retroknowledge *)
type block = 
  | Bconstr of constr
  | Bstrconst of structured_constant
  | Bmakeblock of int * block array
  | Bconstruct_app of int * int * int * block array
                  (* tag , nparams, arity *)
  | Bspecial of (comp_env -> block array -> int -> bytecodes -> bytecodes) * block array
                (* compilation function (see get_vm_constant_dynamic_info in 
                   retroknowledge.mli for more info) , argument array  *)