程序求助：work_en_pos是干什么用的？

always @(posedge clk_sys or negedge rst_sys_n)
begin
    if(!rst_sys_n) work_en_1d <= #U_DLY 1'b0;
    else work_en_1d <= #U_DLY work_en;
end

assign work_en_pos = (~work_en_1d)&work_en;

always @(posedge clk_sys or negedge rst_sys_n)
begin
    if(!rst_sys_n) cnt_cycle <= #U_DLY 26'd0;
    else if(work_en_pos) cnt_cycle <= #U_DLY CNT_INIT;
    else if....
     else....
end

work_en_pos是干什么用的？时钟一来不就变成0了吗。那else if(work_en_pos) cnt_cycle <= #U_DLY CNT_INIT;这句不是永远也执行不了了吗？