Fix reg_write flag

cpu/src/control.mj

@@ -69,10 +69,7 @@ control(instruction:[6],
      Faux pour les sauts (j, jr, jal), branchements (beq, bne) et
      pour multiplication et division (mult, div) *)
 
-  reg_write = (not(instruction[0] or instruction[1] or instruction[2])
-               and ((instruction[3] and not(instruction[4])) (* beq, bne *)
-                    or (not(instruction[3]) and instruction[4])) (* j, jal *)
-              ) or (not(funct[0]) and funct[2]); (* jr, mult, div *)
+  reg_write = not(jump or branch or (funct[2] and not funct[0]));
 
   (* write_pc à 1 => entrée du banc de registre issue de PC
      Uniquement utilisé pour l'instruction jal *)

test/cpu/alu.in

@@ -19,9 +19,6 @@
 00000000000000000001000110011100
 00000000000000001001011000001010
 0111
-00000000000000000001000110011100
-00000000000000000000000000000011
-1100
-00000000000000000001000110011100
-00000000000000000000000000000011
-1000
+00000000000000000000000000000000
+11111111111111111111111111111111
+1111

test/cpu/alu.out

@@ -12,7 +12,5 @@
 11111111111111110110100001100001
 0
 00000000000000001000011110010110
-0
-00000000000000000000001000110011
-0
-00000000000000001000110011100000
+1
+00000000000000000000000000000000