helm/software/matita/contribs/assembly/compiler/preast_tree.ma

   1 (**************************************************************************)
   2 (*       ___                                                              *)
   3 (*      ||M||                                                             *)
   4 (*      ||A||       A project by Andrea Asperti                           *)
   5 (*      ||T||                                                             *)
   6 (*      ||I||       Developers:                                           *)
   7 (*      ||T||         The HELM team.                                      *)
   8 (*      ||A||         http://helm.cs.unibo.it                             *)
   9 (*      \   /                                                             *)
  10 (*       \ /        This file is distributed under the terms of the       *)
  11 (*        v         GNU General Public License Version 2                  *)
  12 (*                                                                        *)
  13 (**************************************************************************)
  14
  15 (* ********************************************************************** *)
  16 (*                                                                        *)
  17 (* Sviluppato da:                                                         *)
  18 (*   Cosimo Oliboni, oliboni@cs.unibo.it                                  *)
  19 (*                                                                        *)
  20 (* ********************************************************************** *)
  21
  22 include "string/string.ma".
  23 include "compiler/utility.ma".
  24 include "freescale/word32.ma".
  25 include "compiler/ast_type.ma".
  26
  27 (* ****************** *)
  28 (* PREALBERO DI TOKEN *)
  29 (* ****************** *)
  30
  31 (* espressioni *)
  32 inductive preast_expr : Type ≝
  33   PREAST_EXPR_BYTE8 : byte8 → preast_expr
  34 | PREAST_EXPR_WORD16: word16 → preast_expr
  35 | PREAST_EXPR_WORD32: word32 → preast_expr
  36
  37 | PREAST_EXPR_NEG: preast_expr → preast_expr
  38 | PREAST_EXPR_NOT: preast_expr → preast_expr
  39 | PREAST_EXPR_COM: preast_expr → preast_expr
  40
  41 | PREAST_EXPR_ADD: preast_expr → preast_expr → preast_expr
  42 | PREAST_EXPR_SUB: preast_expr → preast_expr → preast_expr
  43 | PREAST_EXPR_MUL: preast_expr → preast_expr → preast_expr
  44 | PREAST_EXPR_DIV: preast_expr → preast_expr → preast_expr
  45 | PREAST_EXPR_SHR: preast_expr → preast_expr → preast_expr
  46 | PREAST_EXPR_SHL: preast_expr → preast_expr → preast_expr
  47
  48 | PREAST_EXPR_GT : preast_expr → preast_expr → preast_expr
  49 | PREAST_EXPR_GTE: preast_expr → preast_expr → preast_expr
  50 | PREAST_EXPR_LT : preast_expr → preast_expr → preast_expr
  51 | PREAST_EXPR_LTE: preast_expr → preast_expr → preast_expr
  52 | PREAST_EXPR_EQ : preast_expr → preast_expr → preast_expr
  53 | PREAST_EXPR_NEQ: preast_expr → preast_expr → preast_expr
  54
  55 | PREAST_EXPR_B8toW16 : preast_expr → preast_expr
  56 | PREAST_EXPR_B8toW32 : preast_expr → preast_expr
  57 | PREAST_EXPR_W16toB8 : preast_expr → preast_expr
  58 | PREAST_EXPR_W16toW32: preast_expr → preast_expr
  59 | PREAST_EXPR_W32toB8 : preast_expr → preast_expr
  60 | PREAST_EXPR_W32toW16: preast_expr → preast_expr
  61
  62 | PREAST_EXPR_ID: preast_var → preast_expr
  63
  64 (* variabile: modificatori di array/struct dell'id *)
  65 with preast_var : Type ≝
  66   PREAST_VAR_ID: aux_str_type → preast_var
  67 | PREAST_VAR_ARRAY: preast_var → preast_expr → preast_var
  68 | PREAST_VAR_STRUCT: preast_var → nat → preast_var.
  69
  70 (* -------------------------- *)
  71
  72 (* inizializzatori: ... valori ... *)
  73 inductive preast_init_val : Type ≝
  74   PREAST_INIT_VAL_BYTE8: byte8 → preast_init_val
  75 | PREAST_INIT_VAL_WORD16: word16 → preast_init_val
  76 | PREAST_INIT_VAL_WORD32: word32 → preast_init_val
  77 | PREAST_INIT_VAL_ARRAY: ne_list preast_init_val → preast_init_val
  78 | PREAST_INIT_VAL_STRUCT: ne_list preast_init_val → preast_init_val.
  79
  80 (*
  81  inizializzatori: ammesse solo due forme, no ibridi
  82   1) var1 = var2
  83   2) var = ... valori ...
  84 *)
  85 inductive preast_init : Type ≝
  86   PREAST_INIT_VAR: preast_var → preast_init
  87 | PREAST_INIT_VAL: preast_init_val → preast_init.
  88
  89 (* -------------------------- *)
  90
  91 (* statement: assegnamento/while/if else if else *)
  92 inductive preast_stm : Type ≝
  93   PREAST_STM_ASG: preast_var → preast_expr → preast_stm
  94 | PREAST_STM_WHILE: preast_expr → preast_decl → preast_stm
  95 | PREAST_STM_IF: ne_list (Prod preast_expr preast_decl) → option preast_decl → preast_stm
  96
  97 (* dichiarazioni *)
  98 with preast_decl : Type ≝
  99   PREAST_NO_DECL: list preast_stm → preast_decl
 100 | PREAST_DECL: bool → aux_str_type → ast_type → option preast_init → preast_decl → preast_decl.
 101
 102 (* -------------------------- *)
 103
 104 (* programma *)
 105 inductive preast_root : Type ≝
 106   PREAST_ROOT: preast_decl → preast_root.
 107
 108 (* -------------------------- *)
 109
 110 (* programma vuoto *)
 111 definition empty_preast_prog ≝ PREAST_ROOT (PREAST_NO_DECL (nil ?)).