alu.tan.summary

ALU可以实现16种操作（包括加减乘除移位运算等）

--------------------------------------------------------------------------------------
Timing Analyzer Summary
--------------------------------------------------------------------------------------

Type           : Worst-case tsu
Slack          : N/A
Required Time  : None
Actual Time    : 7.303 ns
From           : sel
To             : reg:B_reg|Q[11]
From Clock     : 
To Clock       : clk
Failed Paths   : 0

Type           : Worst-case tco
Slack          : N/A
Required Time  : None
Actual Time    : 22.616 ns
From           : reg:B_reg|Q[0]
To             : Z
From Clock     : clk
To Clock       : 
Failed Paths   : 0

Type           : Worst-case tpd
Slack          : N/A
Required Time  : None
Actual Time    : 19.888 ns
From           : OP[3]
To             : Z
From Clock     : 
To Clock       : 
Failed Paths   : 0

Type           : Worst-case th
Slack          : N/A
Required Time  : None
Actual Time    : -3.419 ns
From           : Dinput[4]
To             : reg:A_reg|Q[4]
From Clock     : 
To Clock       : clk
Failed Paths   : 0

Type           : Total number of failed paths
Slack          : 
Required Time  : 
Actual Time    : 
From           : 
To             : 
From Clock     : 
To Clock       : 
Failed Paths   : 0

--------------------------------------------------------------------------------------