X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fng_assembly%2Fnum%2Fbyte8.ma;h=bc7e6f9ceaeb06ced915251f53fc2204695e6d0e;hb=29cfb9e2961e62c836cb50217905c0594a074e81;hp=f2cbdb7583e7959eae5ebbe0182387ca84302d0d;hpb=b1c174cffd3c1d10383a52d63a6e662156fb0bb7;p=helm.git

diff --git a/helm/software/matita/contribs/ng_assembly/num/byte8.ma b/helm/software/matita/contribs/ng_assembly/num/byte8.ma
index f2cbdb758..bc7e6f9ce 100755
--- a/helm/software/matita/contribs/ng_assembly/num/byte8.ma
+++ b/helm/software/matita/contribs/ng_assembly/num/byte8.ma
@@ -15,8 +15,8 @@
 (* ********************************************************************** *)
 (*                          Progetto FreeScale                            *)
 (*                                                                        *)
-(*   Sviluppato da: Cosimo Oliboni, oliboni@cs.unibo.it                   *)
-(*     Cosimo Oliboni, oliboni@cs.unibo.it                                *)
+(*   Sviluppato da: Ing. Cosimo Oliboni, oliboni@cs.unibo.it              *)
+(*   Ultima modifica: 05/08/2009                                          *)
 (*                                                                        *)
 (* ********************************************************************** *)
 
@@ -91,10 +91,10 @@ ndefinition ror_b8 ≝
    | false ⇒ mk_byte8 bh' bl' ]]].
 
 (* operatore rotazione destra n-volte *)
-nlet rec ror_b8_n (b:byte8) (n:oct) (r:rec_oct n) on r ≝
- match r with
-  [ oc_O ⇒ b
-  | oc_S t n' ⇒ ror_b8_n (ror_b8 b) t n' ].
+nlet rec ror_b8_n (b:byte8) (n:nat) on n ≝
+ match n with
+  [ O ⇒ b
+  | S n' ⇒ ror_b8_n (ror_b8 b) n' ].
 
 (* operatore rotazione sinistra con carry *)
 ndefinition rcl_b8 ≝
@@ -117,10 +117,10 @@ ndefinition rol_b8 ≝
    | false ⇒ mk_byte8 bh' bl' ]]].
 
 (* operatore rotazione sinistra n-volte *)
-nlet rec rol_b8_n (b:byte8) (n:oct) (r:rec_oct n) on r ≝
- match r with
-  [ oc_O ⇒ b
-  | oc_S t n' ⇒ rol_b8_n (rol_b8 b) t n' ].
+nlet rec rol_b8_n (b:byte8) (n:nat) on n ≝
+ match n with
+  [ O ⇒ b
+  | S n' ⇒ rol_b8_n (rol_b8 b) n' ].
 
 (* operatore not/complemento a 1 *)
 ndefinition not_b8 ≝
@@ -346,8 +346,12 @@ ndefinition b8_to_recb8_aux3 : Πn1,n2.rec_byte8 〈n1,x0〉 → rec_byte8 〈n1
   | xF ⇒ b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? (b8_S ? recb))))))))))))))
   ].
 
-ndefinition b8_to_recb8 ≝
-λn.b8_to_recb8_aux3 (b8h n) (b8l n) (b8_to_recb8_aux2 (b8h n) (ex_to_recex (b8h n))).
+ndefinition b8_to_recb8 : Πb.rec_byte8 b.
+ #b;
+ nletin K ≝ (b8_to_recb8_aux3 (b8h b) (b8l b) (b8_to_recb8_aux2 (b8h b) (ex_to_recex (b8h b))));
+ nelim b in K:(%) ⊢ %;
+ #e1; #e2; nnormalize; #H; napply H.
+nqed.
 
 (* ottali → esadecimali *)
 ndefinition b8_of_bit ≝