xst -intstyle ise -ifn "F:/WORKAREA/counter/first_counter_tb.xst" -ofn "F:/WORKAREA/counter/first_counter_tb.syr" 
xst -intstyle ise -ifn "F:/WORKAREA/counter/first_counter_tb.xst" -ofn "F:/WORKAREA/counter/first_counter_tb.syr" 
xst -intstyle ise -ifn "F:/WORKAREA/counter/first_counter_tb.xst" -ofn "F:/WORKAREA/counter/first_counter_tb.syr"