Branch_Target_Buffer
1	1	+1	# nb_context     
1 	1   	*2	# nb_instruction [0] [nb_context]
1 	1 	*4	# size_buffer    
1 	1 	*4	# associativity  
30	30	*2	# size_address   
2	2	+1	# size_counter   
1	1	*4	# nb_inst_predict
1	1	*4	# nb_inst_decod  
1	1  	*4	# nb_inst_commit 
3	3	+1	# victim_scheme