***********************************************************************/
*                                                                     */
*                           Objective Caml                            */
*                                                                     */
*            Damien Doligez, Projet Para, INRIA Rocquencourt          */
*                                                                     */
*  Copyright 1996 Institut National de Recherche en Informatique et   */
*  Automatique.  Distributed only by permission.                      */
*                                                                     */
***********************************************************************/

* $Id$ */

* The bytecode interpreter in 68000 assembly language */

;  print push,off
;  include 'Types.a'       ; pour _Debugger
;  print pop

  string asis
  print nopage
  case obj

  import (LMODT, LDIVT, ULMULT) : code
  import (extern_sp, atom_table, local_roots, stack_high) : data
  import (external_raise) : data
  import (__setjmp) : code
  import (exn_bucket, young_ptr, young_limit) : data
  import (minor_collection, modify) : code
  import (global_data, heap_start, heap_end, page_table, gc_phase): data
  import (darken): code
  import (young_start, young_end, ref_table_ptr, ref_table_limit): data
  import (realloc_ref_table): code
  import (trapsp): data
  import (longjmp): code
  import (stack_threshold): data
  import (realloc_stack): code
  import (something_to_do, force_major_slice, pending_signal): data
  import (signal_handlers, have_to_interact): data
  import (rotatecursor_action): code
  import (cprim): data
  import (raise_zero_divide, fatal_error_arg): code
  import (thread_code): code
  import (instr_table, instr_base): data
  import (callback_depth): data

msg       record
          dc.b       'Fatal error in interp: bad opcode (%lx)', $0D, $00
endr

interprete proc export

accu_                    equ    A2
pc_                      equ    A3
sp_                      equ    A4
env_                     equ    A5
jtbl_                    equ    A6

y_ptr_reg                equ    D1
y_limit_reg              equ    D2
; saved A5                      D6
extra_args_              equ    D7

; pile: relatif a A6
; raise_buf_               equ      -$40
; initial_sp_offset_       equ      -$44
; initial_external_raise_  equ      -$48
; initial_local_roots_     equ      -$4C
; initial_callback_depth_  equ      -$50

; pile: relatif a A7
local_var_size_          equ      $50
raise_buf_               equ      $10
initial_sp_offset_       equ      $0C
initial_external_raise_  equ      $08
initial_local_roots_     equ      $04
initial_callback_depth_  equ      $00

; temporaires: A0 A1 D0 D3 D4 D5  (D3, D4, D5 sont callee-save)
; stack: A7

; Pour appeler une fonction, il faut
; 1. remettre A5 dans son etat normal
; 2. remettre young_ptr et young_limit dans les globaux

     macro
          Call_setup
          EXG.L      D6, A5
          MOVE.L     y_ptr_reg, (young_ptr).L
          MOVE.L     y_limit_reg, (young_limit).L
     endm
     
     macro
          Call_restore
          MOVE.L     (young_limit).L, y_limit_reg
          MOVE.L     (young_ptr).L, y_ptr_reg
          EXG.L      D6, A5
     endm

     macro
          UDispatch
          MOVE.L     (pc_)+, D0
          JMP        (jtbl_, D0.W)
     endm


; L'interprete commence ici.

          MOVEM.L    D3-D7/A2-A6,-(A7)                  ; 10 registres
          LEA.L      -local_var_size_(A7), A7
          Call_restore

          MOVE.L     local_var_size_+4*10+$4(A7), D0    ; code
          BNE.S      noinit                             ; == NULL => init
          LEA.L      table(PC), A0
          MOVE.L     A0, (instr_table).L
          CLR.L      (instr_base).L
          MOVEQ.L    #1, D0
          Call_setup                                    ; 2eme copie: "lbl_1B88"
          LEA.L      local_var_size_(A7), A7
          MOVEM.L    (A7)+, D3-D7/A2-A6
          RTS        

noinit:   MOVEA.L    local_var_size_+4*10+$4(A7), A0    ; code
          CMPI.L     #124, (A0)
          BHI.S      nothread                           ; deja tresse

          MOVE.L     local_var_size_+4*10+$8(A7), -(A7) ; argument 1 (size)
          MOVE.L     local_var_size_+4*10+$8(A7), -(A7) ; argument 0 (code)
          Call_setup
          JSR        (thread_code).L
          Call_restore
          LEA.L      $8(A7), A7

nothread: LEA.L      i_start(PC), A6
          ADDA.L     #$8000, A6
          MOVE.L     (local_roots).L, initial_local_roots_(A7)
          MOVE.L     (stack_high).L, D0
          SUB.L      (extern_sp).L, D0
          MOVE.L     D0, initial_sp_offset_(A7)
          MOVE.L     (external_raise).L, initial_external_raise_(A7)
          MOVE.L     (callback_depth).L, initial_callback_depth_(A7)
          PEA.L      raise_buf_(A7)
          Call_setup
          JSR        (__setjmp).L
          Call_restore
          ADDQ.L     #4, A7
          TST.L      D0
          BEQ.S      lbl_78                      ; endif
          MOVE.L     initial_local_roots_(A7), (local_roots).L
          MOVE.L     initial_callback_depth_(A7), (callback_depth).L
          MOVEA.L    (exn_bucket).L, accu_
          JMP        i_82-i_base(A6)             ; RAISE
lbl_78:   LEA.L      raise_buf_(A7), A0
          MOVE.L     A0, (external_raise).L
          MOVEA.L    (extern_sp).L, sp_
          MOVEA.L    local_var_size_+4*10+4(A7), pc_    ; argument 0 (code)
          CLR.L      extra_args_
          LEA.L      (atom_table+4).L, env_
          MOVEA.W    #1, accu_
          UDispatch

; Table pour thread_code
     macro
          Make_table
     lcla &i
&i   seta 0
     while &i < 124 do
          DC.L       i_&i - i_base
&i   seta &i + 1
     endw
     endm

table:    Make_table

; Remplissage
     macro
          Spacer &n
     actr 1500
     lcla &i
&i   seta 0
     while &i < &n - 15 do
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
          NOP
&i   seta &i + 16
     endw
     while &i < &n do
          NOP
&i   seta &i + 1
     endw
     endm

     macro
          Dispatch
          UDispatch
          Spacer 16
          BRA        fatal
     endm

     macro
          Nodispatch
          Spacer 16
          BRA        fatal
     endm

; 64k dans lesquels on branche directement.
i_start:  Spacer 16384

i_base:   Spacer 256
fatal:    MOVE.L     -4(pc_), -(A7)
          PEA.L      (msg).L
          Call_setup
          JSR        (fatal_error_arg).L
          ; Call_restore                     never reached
          ; ADDQ.L     #8, A7

     macro
          ACC &n
          MOVEA.L    4*&n(sp_), accu_
          Dispatch
     endm

i_0:      ACC 0
i_1:      ACC 1
i_2:      ACC 2
i_3:      ACC 3
i_4:      ACC 4
i_5:      ACC 5
i_6:      ACC 6
i_7:      ACC 7

; ACC
i_8:      MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (sp_, D0.L), accu_
          Dispatch

; PUSH
i_9:      MOVE.L     accu_, -(sp_)
          Dispatch

; PUSHACC0                           ; identique a PUSH
i_10:     MOVE.L     accu_, -(sp_)
          Dispatch

     macro
          PUSHACC &n
          MOVE.L     accu_, -(sp_)
          MOVEA.L    4*&n(sp_), accu_
          Dispatch
     endm

i_11:     PUSHACC 1
i_12:     PUSHACC 2
i_13:     PUSHACC 3
i_14:     PUSHACC 4
i_15:     PUSHACC 5
i_16:     PUSHACC 6
i_17:     PUSHACC 7

; PUSHACC
i_18:     MOVE.L     accu_, -(sp_)
          MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (sp_, D0.L), accu_
          Dispatch

; POP
i_19:     MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          ADDA.L     D0, sp_
          Dispatch

; ASSIGN
i_20:     MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVE.L     accu_, (sp_, D0.L)
          MOVEA.W    #1, accu_
          Dispatch

     macro
          ENVACC &n
          MOVEA.L    4*&n(env_), accu_
          Dispatch
     endm

i_21:     ENVACC 1
i_22:     ENVACC 2
i_23:     ENVACC 3
i_24:     ENVACC 4

; ENVACC
i_25:     MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (env_, D0.L), accu_
          Dispatch

     macro
          PUSHENVACC &n
          MOVE.L     accu_, -(sp_)
          MOVEA.L    4*&n(env_), accu_
          Dispatch
     endm

i_26:     PUSHENVACC 1
i_27:     PUSHENVACC 2
i_28:     PUSHENVACC 3
i_29:     PUSHENVACC 4

; PUSHENVACC
i_30:     MOVE.L     accu_, -(sp_)
          MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (env_, D0.L), accu_
          Dispatch

; PUSH_RETADDR
i_31:     MOVE.L     extra_args_, D0
          ASL.L      #1, D0
          ADDQ.L     #1, D0
          MOVE.L     D0, -(sp_)
          MOVE.L     env_, -(sp_)
          MOVE.L     (pc_), D0
          ASL.L      #2, D0
          ADD.L      pc_, D0
          ADDQ.L     #4, pc_
          MOVE.L     D0, -(sp_)
          Dispatch

; APPLY
i_32:     MOVE.L     (pc_), extra_args_
          SUBQ.L     #1, extra_args_
          MOVEA.L    (accu_), pc_
          MOVEA.L    accu_, env_
          BRA        chk_stks
          Nodispatch

     macro
          APPLY &n
          LEA.L      -$0C(sp_), A0
     if &n = 2 then
          MOVE.L     (sp_)+, (A0)+
     elseif &n = 3 then
          MOVE.L     (sp_)+, (A0)+
          MOVE.L     (sp_)+, (A0)+
     endif
          MOVE.L     (sp_), (A0)+
          LEA.L      -4*&n-8(sp_), sp_
          MOVE.L     pc_, (A0)+
          MOVE.L     env_, (A0)+
          ASL.L      #1, extra_args_
          ADDQ.L     #1, extra_args_
          MOVE.L     extra_args_, (A0)
          MOVEA.L    (accu_), pc_
          MOVEA.L    accu_, env_
          MOVEQ      #&n-1, extra_args_
          BRA        chk_stks
          Nodispatch
     endm

i_33:     APPLY 1
i_34:     APPLY 2
i_35:     APPLY 3

; APPTERM
i_36:     MOVE.L     (pc_)+, D3             ; nargs = D3
          ADD.L      D3, extra_args_
          SUBQ.L     #1, extra_args_
          MOVE.L     (pc_), D0              ; slotsize = D0
          SUB.L      D3, D0
          ASL.L      #2, D0
          LEA.L      (sp_, D0.L), A0        ; newsp = A0
          ASL.L      #2, D3                 ; i = D3/4
          BRA.S      lbl_46E
lbl_452:  MOVE.L     (sp_, D3.L), (A0, D3.L)
lbl_46E:  SUBQ.L     #4, D3
          BPL.S      lbl_452
          MOVEA.L    A0, sp_
          MOVEA.L    (accu_), pc_
          MOVEA.L    accu_, env_
          BRA        chk_stks
          Nodispatch

     macro
          APPTERM &n
          MOVEA.L    sp_, A0
          MOVE.L     (pc_), D0
          ASL.L      #2, D0
          ADDA.L     D0, sp_
     if &n = 3 then
          MOVE.L     8(A0), -(sp_)
          MOVE.L     4(A0), -(sp_)
     elseif &n = 2 then
          MOVE.L     4(A0), -(sp_)
     endif
          MOVE.L     (A0), -(sp_)
          MOVEA.L    (accu_), pc_
          MOVEA.L    accu_, env_
     if &n > 1 then
          ADDQ.L     #&n-1, extra_args_
     endif
          BRA        chk_stks
          Nodispatch
     endm

i_37:     APPTERM 1
i_38:     APPTERM 2
i_39:     APPTERM 3

; RETURN
i_40:     MOVE.L     (pc_), D0
          ASL.L      #2, D0
          ADD.L      D0, sp_
          TST.L      extra_args_
          BLE.S      lbl_562
          SUBQ.L     #1, extra_args_
          MOVEA.L    (accu_), pc_
          MOVEA.L    accu_, env_
          UDispatch
lbl_562:  MOVEA.L    (sp_)+, pc_
          MOVEA.L    (sp_)+, env_
          MOVE.L     (sp_)+, extra_args_
          ASR.L      #1, extra_args_
          Dispatch

; RESTART
i_41:     MOVE.L     -4(env_), D5                 ; D5 = num_args
          LSR.L      #8, D5
          LSR.L      #2, D5
          SUBQ.L     #2, D5
          MOVE.L     D5, D0
          ASL.L      #2, D0                       ; D0 = i*4
          SUB.L      D0, sp_
          BRA.S      lbl_5B6
lbl_598:  MOVE.L     8(env_, D0.L), (sp_, D0.L)
lbl_5B6:  SUBQ.L     #4, D0
          BPL.S      lbl_598
          MOVEA.L    4(env_), env_
          ADD.L      D5, extra_args_
          Dispatch

     macro
          Setup_for_gc
          MOVE.L     env_, -(sp_)
          MOVE.L     accu_, -(sp_)
          MOVE.L     sp_, (extern_sp).L
     endm

     macro
          Restore_after_gc
          MOVEA.L    (sp_)+, accu_
          MOVEA.L    (sp_)+, env_
     endm

; Alloc_small [#],size, [#],tag
; entree: size = taille en octets AVEC HEADER
;         tag = la valeur du tag + $0300
; '#' indique un immediat, (vide) indique un registre
; sortie dans &result, qui doit etre un registre d'adresse.

; Tous les registres sont preserves sauf A0, A1, D0
;   &size et &tag sont ecrases si ce sont des registres
     macro
          Alloc_small &sizetype, &size, &tagtype, &tag, &result
          MOVEA.L    y_ptr_reg, &result
          SUBA.L     &sizetype.&size, &result
          CMPA.L     y_limit_reg, &result
          BCC.S      @OK
     if &tagtype = '' then
          MOVE.L     &tag, -(A7)
     endif
     if &sizetype = '' then
          MOVE.L     &size, -(A7)
     endif
          Setup_for_gc
          Call_setup
          JSR        (minor_collection).L
          Call_restore
          Restore_after_gc
     if &sizetype = '' then
          MOVE.L     (A7)+, &size
     endif
     if &tagtype = '' then
          MOVE.L     (A7)+, &tag
     endif
          MOVEA.L    y_ptr_reg, &result
          SUBA.L     &sizetype.&size, &result
@OK:      MOVE.L     &result, y_ptr_reg
     if &sizetype = '' then
          SUBQ.L     #4, &size
          LSL.L      #8, &size
          OR.W       &tagtype.&tag, &size
          MOVE.L     &size, (&result)+
     elseif &tagtype = '' then
          ORI.W      #(&size-4) << 8, &tag
          MOVE.L     &tag, (&result)+
     else
          MOVEI.L    #((&size-4)<<8) + &tag, (&result)+
     endif
     endm

; GRAB
i_42:     MOVE.L     (pc_)+, D3                   ; D3 = required
          CMP.L      extra_args_, D3
          BGT        i_42x
          SUB.L      D3, extra_args_
          UDispatch
i_42x:    MOVE.L     extra_args_, D4              ; extra_args_ = num_args
          ADDQ.L     #4, D4
          LSL.L      #2, D4
          Alloc_small ,D4, #,$3FA, accu_
          MOVE.L     env_, 4(accu_)
          LEA.L      8(accu_), A0
lbl_658:  MOVE.L     (sp_)+, (A0)+
lbl_676:  SUBQ.L     #1, extra_args_
          BPL.S      lbl_658
          LEA.L      -$0C(pc_), A0
          MOVE.L     A0, (accu_)
          MOVEA.L    (sp_)+, pc_
          MOVEA.L    (sp_)+, env_
          MOVE.L     (sp_)+, extra_args_
          ASR.L      #1, extra_args_
          Dispatch

; CLOSURE
i_43:     MOVE.L     (pc_)+, D5
          BLE.S      lbl_6C8
          MOVE.L     accu_, -(sp_)
lbl_6C8:  MOVE.L     D5, D0
          ASL.L      #2, D0
          ADDQ.L     #8, D0
          Alloc_small ,D0, #,$3FA, accu_
          MOVE.L     (pc_), D0
          ASL.L      #2, D0
          ADD.L      pc_, D0
          MOVEA.L    accu_, A0
          MOVE.L     D0, (A0)+
          BRA.S      lbl_766
lbl_746:  MOVE.L     (sp_)+, (A0)+
lbl_766:  SUBQ.L     #1, D5
          BPL.S      lbl_746
          ADDQ.L     #4, pc_
          Dispatch

; CLOSUREREC
i_44:     MOVE.L     (pc_)+, D5
          BLE.S      lbl_792
          MOVE.L     accu_, -(sp_)
lbl_792:  MOVE.L     D5, D0
          ADDQ.L     #3, D0
          ASL.L      #2, D0
          Alloc_small ,D0, #,$3FA, accu_
          MOVEA.L    accu_, A0
          MOVE.L     (pc_), D0
          ASL.L      #2, D0
          ADD.L      pc_, D0
          MOVE.L     D0, (A0)+
          MOVEQ.L    #1, D0
          MOVE.L     D0, (A0)+
          BRA.S      lbl_838
lbl_818:  MOVE.L     (sp_)+, (A0)+
lbl_838:  SUBQ.L     #1, D5
          BPL.S      lbl_818
          MOVE.L     accu_, -(A7)
          PEA.L      4(accu_)
          Call_setup
          JSR        (modify).L
          Call_restore
          ADDQ.L     #8, A7
          ADDQ.L     #4, pc_
          Dispatch

; GETGLOBAL
i_45:     MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (global_data).L, A0
          MOVEA.L    (A0, D0.L), accu_
          Dispatch

; PUSHGETGLOBAL
i_46:     MOVE.L     accu_, -(sp_)
          MOVE.L     (pc_)+, D0
          ASL.L      #2,D0
          MOVEA.L    (global_data).L, A0
          MOVEA.L    (A0, D0.L), accu_
          Dispatch

; GETGLOBALFIELD
i_47:     MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (global_data).L, A0
          MOVEA.L    (A0, D0.L), A0
          MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (A0, D0.L), accu_
          Dispatch

; PUSHGETGLOBALFIELD
i_48:     MOVE.L     accu_, -(sp_)
          MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (global_data).L, A0
          MOVEA.L    (A0, D0.L), A0
          MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (A0, D0.L), accu_
          Dispatch

; SETGLOBAL
i_49:     MOVE.L     accu_, -(A7)
          MOVE.L     (pc_)+, D0
          ASL.L      #2,D0
          MOVEA.L    (global_data).L, A0
          PEA.L      (A0, D0.L)
          Call_setup
          JSR        (modify).L
          Call_restore
          ADDQ.L     #8, A7
          MOVEA.W    #1, accu_
          Dispatch

; ATOM0
i_50:     LEA.L      (atom_table+4).L, accu_
          Dispatch

; ATOM
i_51:     MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          LEA.L      (atom_table+4).L, accu_
          ADDA.L     D0, accu_
          Dispatch

; PUSHATOM0
i_52:     MOVE.L     accu_, -(sp_)
          LEA.L      (atom_table+4).L, accu_
          Dispatch

; PUSHATOM
i_53:     MOVE.L     accu_, -(sp_)
          MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          LEA.L      (atom_table+4).L, accu_
          ADDA.L     D0, accu_
          Dispatch

; MAKEBLOCK
i_54:     MOVE.L     (pc_)+, D4         ; wosize = D4
          MOVE.L     (pc_)+, D3         ; tag = D3
          ORI.W      #$0300, D3
          MOVE.L     D4, D0
          ADDQ.L     #1, D0
          LSL.L      #2, D0
          Alloc_small ,D0, ,D3, A0
          MOVE.L     accu_, (A0)
          MOVEA.L    A0, accu_
          ADDQ.L     #4, A0
          BRA.S      lbl_A62
lbl_A4C:  MOVE.L     (sp_)+, (A0)+
lbl_A62:  SUBQ.L     #1, D4
          BHI.S      lbl_A4C
          Dispatch

     macro
          MAKEBLOCK &n
          MOVE.L     (pc_)+, D0
          ORI.W      #$0300, D0
          Alloc_small #,4*&n+4, ,D0, A0
          MOVE.L     accu_, (A0)
     if &n = 2 then
          MOVE.L     (sp_)+, 4(A0)
     elseif &n = 3 then
          MOVE.L     (sp_)+, 4(A0)
          MOVE.L     (sp_)+, 8(A0)
     endif
          MOVEA.L    A0, accu_
          Dispatch
     endm

i_55:     MAKEBLOCK 1
i_56:     MAKEBLOCK 2
i_57:     MAKEBLOCK 3

     macro
          GETFIELD &n
          MOVEA.L    4*&n(accu_), accu_
          Dispatch
     endm

i_58:     GETFIELD   0
i_59:     GETFIELD   1
i_60:     GETFIELD   2
i_61:     GETFIELD   3

; GETFIELD
i_62:     MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          MOVEA.L    (accu_, D0.L), accu_
          Dispatch

; SETFIELD0
i_63:     MOVEA.L    accu_, A1                    ; A1 = modify_dest
          ; modify_newval = *sp++
          BRA        lbl_mod
          Nodispatch

     macro
          SETFIELD &n
          LEA.L      4*&n(accu_), A1              ; A1 = modify_dest
          ; modify_newval = *sp++
          BRA        lbl_mod
          Nodispatch
     endm

i_64:     SETFIELD 1
i_65:     SETFIELD 2
i_66:     SETFIELD 3

; SETFIELD
i_67:     MOVE.L     (pc_)+, D0
          ASL.L      #$2, D0
          LEA.L      (accu_, D0.L), A1            ; A1 = modify_dest
          ; modify_newval = *sp++
          BRA        lbl_mod
          Nodispatch

; DUMMY
i_68:     MOVE.L     (pc_)+, D3
          ASL.L      #2, D3
          MOVE.L     D3, D0
          ADDQ.L     #4, D0
          Alloc_small ,D0 ,#,$300, accu_
          MOVEQ.L    #1, D0
          BRA.S      lbl_E28
lbl_E1A:  MOVE.L     D0, (accu_, D3.L)
lbl_E28:  SUBQ.L     #4, D3
          BPL.S      lbl_E1A
          Dispatch

; UPDATE
i_69:     MOVEA.L    (sp_)+, A1
          MOVE.L     -4(A1), D5
          LSR.L      #8, D5
          LSR.L      #2, D5
          ASL.L      #2, D5
          MOVE.B     -1(A1), -1(accu_)
          BRA.S      lbl_E7E
lbl_E5C:  MOVE.L     (A1, D5.L), -(A7)
          PEA.L      (accu_, D5.L)
          Call_setup
          JSR        (modify).L
          Call_restore
          ADDQ.L     #8, A7
lbl_E7E:  SUBQ.L     #4, D5
          BPL.S      lbl_E5C
          BRA        i_90
          Nodispatch

; VECTLENGTH
i_70:     MOVE.L     -4(accu_), D0
          LSR.L      #8, D0
          LSR.L      #1, D0
          ORI.B      #1, D0
          MOVEA.L    D0, accu_
          Dispatch

; GETVECTITEM
i_71:     MOVE.L     (sp_)+, D0
          ASR.L      #1, D0
          ASL.L      #2, D0
          MOVEA.L    (accu_, D0.L), accu_
          Dispatch

; SETVECTITEM
i_72:     MOVE.L     (sp_)+, D0
          ASR.L      #1, D0
          ASL.L      #2, D0
          LEA.L      (accu_, D0.L), A1          ; A1 = modify_dest
          ; modify_newval = *sp++
          BRA        lbl_mod
          Nodispatch

; GETSTRINGCHAR
i_73:     MOVE.L     (sp_)+, D3
          ASR.L      #1, D3
          CLR.L      D0
          MOVE.B     (accu_, D3.L), D0
          ASL.L      #1, D0
          ADDQ.L     #1, D0
          MOVEA.L    D0, accu_
          Dispatch

; SETSTRINGCHAR
i_74:     MOVE.L     (sp_)+, D0
          ASR.L      #1, D0
          MOVE.L     (sp_)+, D3
          ASR.L      #1, D3
          MOVE.B     D3, (accu_, D0.L)
          MOVEA.W    #1, accu_
          Dispatch

; BRANCH
i_75:     MOVE.L     (pc_), D0
          ASL.L      #2, D0
          ADD.L      D0, pc_
          Dispatch

; BRANCHIF
i_76:     CMPA.W     #1, accu_
          BNE        i_75
          ADDQ.L     #4, pc_
          Dispatch

; BRANCHIFNOT
i_77:     CMPA.W     #1, accu_
          BEQ        i_75
          ADDQ.L     #4, pc_
          Dispatch

; SWITCH
i_78:     CLR.L      D5
          MOVE.W     (pc_)+, D5
          CLR.L      D3
          MOVE.W     (pc_)+, D3
          MOVE.L     accu_, D0
          BTST.L     #0, D0
          BNE.S      lbl_F9C
          CLR.L      D0
          MOVE.B     -1(accu_), D0
          ADD.L      D0, D3
          LSL.L      #2, D3
          MOVE.L     (pc_, D3.L), D0
          ASL.L      #2, D0
          ADD.L      D0, pc_
          UDispatch
lbl_F9C:  MOVE.L     accu_, D0
          ASR.L      #1, D0
          CMP.L      D0, D3
          BLS.S      lbl_FC6
          ASL.L      #2, D0
          MOVE.L     (pc_, D0.L), D0
          ASL.L      #2, D0
          ADD.L      D0, pc_
          UDispatch
lbl_FC6:  ADD.L      D5, D3
          LSL.L      #2, D3
          ADDA.L     D3, pc_
          Dispatch

; BOOLNOT
i_79:     MOVEQ      #4, D0
          SUB.L      accu_, D0
          MOVEA.L    D0, accu_
          Dispatch

; PUSHTRAP
i_80:     MOVE.L     extra_args_, D0
          ASL.L      #1, D0
          ADDQ.L     #1, D0
          MOVE.L     D0, -(sp_)
          MOVE.L     env_, -(sp_)
          MOVE.L     (trapsp).L, -(sp_)
          MOVE.L     (pc_), D0
          ASL.L      #2, D0
          ADD.L      pc_, D0
          ADDQ.L     #4, pc_
          MOVE.L     D0, -(sp_)
          MOVE.L     sp_, (trapsp).L
          Dispatch

; POPTRAP
i_81:     MOVE.L     4(sp_), (trapsp).L
          LEA.L      $10(sp_), sp_
          Dispatch

; RAISE                                  XXX debugger stuff not implemented
i_82:     MOVEA.L    (trapsp).L, sp_
          MOVEA.L    (stack_high).L, A0
          MOVE.L     initial_sp_offset_(A7), D0
          SUBA.L     D0, A0
          CMPA.L     sp_, A0
          BHI.S      lbl_1080
          MOVE.L     accu_, (exn_bucket).L
          MOVE.L     initial_external_raise_(A7), D3
          MOVE.L     D3, (external_raise).L
          PEA.L      (1).W
          MOVE.L     D3, -(A7)
          Call_setup
          JSR        (longjmp).L
          Call_restore
          ADDQ.L     #8, A7
lbl_1080: MOVEA.L    (sp_)+, pc_
          MOVE.L     (sp_)+, (trapsp).L
          MOVEA.L    (sp_)+, env_
          MOVE.L     (sp_)+, extra_args_
          ASR.L      #1, extra_args_
          Dispatch

; CHECK_SIGNALS
i_83:     TST.L      (something_to_do).L
          BNE        i_83x
          UDispatch
i_83x:    CLR.L      (something_to_do).L
          TST.L      (force_major_slice).L
          BEQ.S      lbl_1116
          Setup_for_gc
          Call_setup
          JSR        (minor_collection).L
          Call_restore
          Restore_after_gc
lbl_1116: MOVE.L     (pending_signal).L, D5
          CLR.L      (pending_signal).L
          TST.L      D5
          BEQ.S      lbl_1168
          ASL.L      #1, extra_args_
          ADDQ.L     #1, extra_args_
          MOVE.L     extra_args_, -(sp_)
          MOVE.L     env_, -(sp_)
          MOVE.L     pc_, -(sp_)
          ASL.L      #1, D5
          ADDQ.L     #1, D5
          MOVE.L     D5, -(sp_)
          ASR.L      #1, D5
          ASL.L      #2, D5
          MOVEA.L    (signal_handlers).L, A0
          MOVEA.L    (A0, D5.L), env_
          MOVEA.L    (env_), pc_
          CLR.L      extra_args_
lbl_1168: TST.L      (have_to_interact).L
          BNE.S      interact
          UDispatch
interact: CLR.L      (have_to_interact).L
          CLR.L      -(A7)
          Call_setup
          JSR        (rotatecursor_action).L
          Call_restore
          ADDQ.L     #4, A7
          Dispatch

     macro
          Setup_for_c_call
          MOVE.L     env_, -(sp_)
          MOVE.L     sp_, (extern_sp).L
     endm
     
     macro
          Restore_after_c_call
          MOVEA.L    (extern_sp).L, sp_
          MOVEA.L    (sp_)+, env_
     endm

     macro
          C_CALL &n
     lcla &p

          Setup_for_c_call
&p   seta &n-1
     while &p > 0 do
          MOVE.L     &p*4(sp_), -(A7)
&p   seta &p-1
     endw
          MOVE.L     accu_, -(A7)
          MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          LEA.L      (cprim).L, A0
          MOVEA.L    (A0, D0.L), A0
          Call_setup
          JSR        (A0)
          Call_restore
     if &n <= 2 then
          ADDQ.L     #&n*4, A7
     else
          LEA.L      &n*4(A7), A7
     endif
          MOVEA.L    D0, accu_
          Restore_after_c_call
     if &n > 1 then
          LEA.L      &n*4-4(sp_), sp_
     endif
          Dispatch
     endm

i_84:     C_CALL 1
i_85:     C_CALL 2
i_86:     C_CALL 3
i_87:     C_CALL 4
i_88:     C_CALL 5

; C_CALLN
i_89:     MOVE.L     (pc_)+, D4
          MOVE.L     accu_, -(sp_)
          Setup_for_c_call
          MOVE.L     D4, -(A7)
          PEA.L      4(sp_)
          MOVE.L     (pc_)+, D0
          ASL.L      #2, D0
          LEA.L      (cprim).L, A0
          MOVEA.L    (A0, D0.L), A0
          Call_setup
          JSR        (A0)
          Call_restore
          ADDQ.L     #8, A7
          MOVEA.L    D0, accu_
          Restore_after_c_call
          ASL.L      #2, D4
          ADDA.L     D4, sp_
          Dispatch

     macro
          CONST &n
          MOVEA.W    #&n*2+1, accu_
          Dispatch
     endm

i_90:     CONST 0
i_91:     CONST 1
i_92:     CONST 2
i_93:     CONST 3

; CONSTINT
i_94:     MOVEA.L    (pc_)+, A0
          LEA.L      1(A0, A0.L), accu_
          Dispatch

     macro
          PUSHCONST &n
          MOVE.L     accu_, -(sp_)
          CONST &n
     endm

i_95:     PUSHCONST 0
i_96:     PUSHCONST 1
i_97:     PUSHCONST 2
i_98:     PUSHCONST 3

; PUSHCONSTINT
i_99:     MOVE.L     accu_, -(sp_)
          MOVEA.L    (pc_)+, A0
          LEA.L      1(A0, A0.L), accu_
          Dispatch

; NEGINT
i_100:    MOVEQ.L    #2, D0
          SUB.L      accu_, D0
          MOVEA.L    D0, accu_
          Dispatch

; ADDINT
i_101:    ADDA.L     (sp_)+, accu_
          SUBQ.L     #1, accu_
          Dispatch

; SUBINT
i_102:    SUBA.L     (sp_)+, accu_
          ADDQ.L     #1, accu_
          Dispatch

; MULINT
i_103:    MOVE.L     accu_, D0
          ASR.L      #1, D0
          Call_setup
          MOVE.L     (sp_)+, D1
          ASR.L      #1, D1
          JSR        (ULMULT).L
          Call_restore
          ASL.L      #1, D0
          ADDQ.L     #1, D0
          MOVEA.L    D0, accu_
          Dispatch

; DIVMODINT { DIV | MOD }
     macro
          DIVMODINT  &op
          MOVE.L     (sp_)+, D4
          ASR.L      #1, D4
          BNE.S      @ok
          Setup_for_c_call
          Call_setup
          JSR        (raise_zero_divide).L
          Call_restore
@ok       MOVE.L     accu_, D0
          ASR.L      #1, D0
          Call_setup
          MOVE.L     D4, D1
          JSR        (L&op.T).L
          Call_restore
          ASL.L      #1, D0
          ADDQ.L     #1, D0
          MOVEA.L    D0, accu_
          Dispatch
     endm

i_104:    DIVMODINT  DIV
i_105:    DIVMODINT  MOD

; ANDINT
i_106:    MOVE.L     accu_, D0
          AND.L      (sp_)+, D0
          MOVEA.L    D0, accu_
          Dispatch

; ORINT
i_107:    MOVE.L     accu_, D0
          OR.L       (sp_)+, D0
          MOVEA.L    D0, accu_
          Dispatch

; XORINT
i_108:    MOVE.L     accu_, D0
          MOVE.L     (sp_)+, D3
          EOR.L      D3, D0
          ADDQ.L     #1, D0
          MOVEA.L    D0, accu_
          Dispatch

; SHIFTINT { LSL | LSR | ASR }
     macro
          SHIFTINT &op
          MOVE.L     accu_, D0
          SUBQ.L     #1, D0
          MOVE.L     (sp_)+, D3
          ASR.L      #1, D3
          &op..L     D3, D0
          ORI.B      #1, D0
          MOVEA.L    D0, accu_
          Dispatch
     endm

i_109: SHIFTINT LSL
i_110: SHIFTINT LSR
i_111: SHIFTINT ASR

     macro
          INT_COMPARE  &tst
          CMPA.L     (sp_)+, accu_
          B&tst      i_91
          MOVEA.W    #1, accu_
          Dispatch
     endm

i_112:    INT_COMPARE EQ
i_113:    INT_COMPARE NE
i_114:    INT_COMPARE LT
i_115:    INT_COMPARE LE
i_116:    INT_COMPARE GT
i_117:    INT_COMPARE GE

; OFFSETINT
i_118:    MOVE.L     (pc_)+, D0
          ASL.L      #1, D0
          ADDA.L     D0, accu_
          Dispatch

; OFFSETREF
i_119:    MOVE.L     (pc_)+, D0
          ASL.L      #1, D0
          ADD.L      D0, (accu_)
          MOVEA.W    #1, accu_
          Dispatch

; GETMETHOD
i_120:    MOVEA.L    (sp_), A0         ; sp[0]
          MOVEA.L    (A0), A0          ; Field (sp[0], 0)
          MOVE.L     accu_, D3
          MOVEQ      #$12, D0
          ASR.L      D0, D3
          LSL.L      #2, D3            ; (accu >> 16) / sizeof (value) * 4
          MOVEA.L    (A0, D3.L), A0    ; Field (Field (sp[0], 0), (accu >> 16) / sizeof (value))
          MOVE.L     accu_, D0
          ANDI.L     #$03FC, D0        ; ((accu / sizeof (value)) & 0xFF) * 4
          MOVEA.L    (A0, D0.L), accu_ ; Field (Field (Field (...)...)...)
          Dispatch

; STOP
i_121:    MOVE.L     initial_external_raise_(A7), (external_raise).L
          MOVE.L     sp_, (extern_sp).L
          MOVE.L     accu_, D0
          BRA        lbl_1B88
          Nodispatch

; EVENT                                    XXX pas implemente
i_122:    Dispatch

; BREAK                                    XXX pas implemente
i_123:    Dispatch

          Spacer     12100                    ; complete a 64k
          BRA        fatal

lbl_mod:  MOVE.L     (A1), D5                 ; A1 = modify_dest; D5 = _old_
          MOVE.L     (sp_)+, D4               ; D4 = modify_newval
          MOVE.L     D4, (A1)
          CMPA.L     (heap_start).L, A1
          BCS        i_90
          CMPA.L     (heap_end).L, A1
          BCC        i_90
          MOVE.L     A1, D3
          SUB.L      (heap_start).L, D3
          ASR.L      #8, D3
          ASR.L      #4, D3
          MOVEA.L    (page_table).L, A0
          TST.B      (A0, D3.L)
          BEQ        i_90
          TST.L      (gc_phase).L
          BNE.S      lbl_CC2
          MOVE.L     A1, D3                    ; A1 est caller-save
          MOVE.L     D5, -(A7)
          Call_setup
          JSR        (darken).L
          Call_restore
          ADDQ.L     #4 ,A7
          MOVEA.L    D3, A1                    ; A1 est caller-save
lbl_CC2:  BTST.L     #0, D4
          BNE        i_90
          CMP.L      (young_start).L, D4
          BLS        i_90
          CMP.L      (young_end).L, D4
          BCC        i_90
          BTST.L     #0, D5
          BNE.S      lbl_D00
          CMP.L      (young_start).L, D5
          BLS.S      lbl_D00
          CMP.L      (young_end).L, D5
          BCS        i_90
lbl_D00:  MOVEA.L    (ref_table_ptr).L, A0
          MOVE.L     A1, (A0)+
          MOVE.L     A0, (ref_table_ptr).L
          CMPA.L     (ref_table_limit).L, A0
          BCS        i_90
          Call_setup
          JSR        (realloc_ref_table).L
          Call_restore
          BRA        i_90

chk_stks: CMPA.L     (stack_threshold).L, sp_
          BCC        i_83
          MOVE.L     sp_, (extern_sp).L
          Call_setup
          JSR        (realloc_stack).L
          Call_restore
          MOVE.L     (extern_sp).L, sp_
          BRA        i_83

lbl_1B88: Call_setup                                    ; 2eme copie: "init"
          LEA.L      local_var_size_(A7), A7
          MOVEM.L    (A7)+, D3-D7/A2-A6
          RTS        
          dc.b       $80 + 10, 'interprete', 0
          dc.w       0
     endproc

          end