X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fassembly%2Ffreescale%2Fextra.ma;h=f683ecf8fa42e271a7a252c04a3d0ce507ffcb7c;hb=09b92a7ca6e17c21a32471816f5f4c7634e4f937;hp=94f4a47547eebf1a1048c94474c14f35e4e90625;hpb=661ffd4d7c77fce52fb2f2d96f1737be424af3f1;p=helm.git

diff --git a/helm/software/matita/contribs/assembly/freescale/extra.ma b/helm/software/matita/contribs/assembly/freescale/extra.ma
index 94f4a4754..f683ecf8f 100644
--- a/helm/software/matita/contribs/assembly/freescale/extra.ma
+++ b/helm/software/matita/contribs/assembly/freescale/extra.ma
@@ -54,29 +54,69 @@ definition eq_bool ≝
  [ true ⇒ b2
  | false ⇒ not_bool b2 ].
 
+lemma eqbool_switch : ∀b1,b2.eq_bool b1 b2 = eq_bool b2 b1.
+ do 2 intro;
+ elim b1; elim b2;
+ reflexivity.
+qed.
+
+lemma andbool_switch : ∀b1,b2.and_bool b1 b2 = and_bool b2 b1.
+ do 2 intro;
+ elim b1; elim b2;
+ reflexivity.
+qed.
+
+lemma orbool_switch : ∀b1,b2.or_bool b1 b2 = or_bool b2 b1.
+ do 2 intro;
+ elim b1; elim b2;
+ reflexivity.
+qed.
+
+lemma xorbool_switch : ∀b1,b2.xor_bool b1 b2 = xor_bool b2 b1.
+ do 2 intro;
+ elim b1; elim b2;
+ reflexivity.
+qed.
+
+lemma eqbool_to_eq : ∀b1,b2:bool.(eq_bool b1 b2 = true) → (b1 = b2).
+ unfold eq_bool;
+ intros;
+ elim b1 in H:(%);
+ elim b2 in H:(%);
+ normalize in H:(%);
+ try reflexivity;
+ destruct H.
+qed.
+
+lemma eq_to_eqbool : ∀b1,b2.b1 = b2 → eq_bool b1 b2 = true.
+ do 2 intro;
+ elim b1 0;
+ elim b2 0;
+ intro;
+ normalize in H:(%);
+ try destruct H;
+ reflexivity.
+qed.
+
 (* \ominus *)
 notation "hvbox(⊖ a)" non associative with precedence 36
  for @{ 'not_bool $a }.
-interpretation "not_bool" 'not_bool x = 
- (cic:/matita/freescale/extra/not_bool.con x).
+interpretation "not_bool" 'not_bool x = (not_bool x).
 
 (* \otimes *)
 notation "hvbox(a break ⊗ b)" left associative with precedence 35
  for @{ 'and_bool $a $b }.
-interpretation "and_bool" 'and_bool x y = 
- (cic:/matita/freescale/extra/and_bool.con x y).
+interpretation "and_bool" 'and_bool x y = (and_bool x y).
 
 (* \oplus *)
 notation "hvbox(a break ⊕ b)" left associative with precedence 34
  for @{ 'or_bool $a $b }.
-interpretation "or_bool" 'or_bool x y = 
- (cic:/matita/freescale/extra/or_bool.con x y).
+interpretation "or_bool" 'or_bool x y = (or_bool x y).
 
 (* \odot *)
 notation "hvbox(a break ⊙ b)" left associative with precedence 33
  for @{ 'xor_bool $a $b }.
-interpretation "xor_bool" 'xor_bool x y = 
- (cic:/matita/freescale/extra/xor_bool.con x y).
+interpretation "xor_bool" 'xor_bool x y = (xor_bool x y).
 
 (* ProdT e' gia' definito, aggiungo Prod3T e Prod4T e Prod5T *)