simulation doesn't work well

[Altera_Forum]

hi, i asked to build a multiplier 2X4. 

my problem, as you can see in the image, that signal s5 starts one cycle before the others. all the signals connected well and i have no idea why it happend. i have checked my mul and it works well. you can see my code and the simulation at the links below. thanks

[Altera_Forum]

Hi, 

 Just wonder if it is possible for you to initialize the output value ie to 0 to ensure the output to have same values at the beginning of the simulation.

[Altera_Forum]

Its definitely a signal initialisation issue. You need to ensure the values in your testbench that drive your DUT are given initial values.

[Altera_Forum]

do you mean that i need to initialize the register? 

reser = '0' ? or initialize the output of the component? and then how i do it?

[Altera_Forum]

Usually you can define signal name : type := default_value.

[Altera_Forum]

thank you 

works well