ICC 如何延遲net delay？

set_input_delay ?

謝謝,我是想問如何用BUF來實現 我想加的delay 值

delay cell

不可能精准的加的，目前无法实现这种功能。即使在ICC中加入的buffer是1ns延迟，到了PT里面又不是1ns了

set_annotate_delay

set_annotated_delaySets the net or cell delay value between two pins.
SYNTAX
status set_annotated_delay
-net |-cell
[-load_delay load_delay_type]
[-rise |-fall]
[-min]
[-max]
delay_value
-from from_pins
-to to_pins
[-worst]
Data Types
load_delay_type string
delay_value float
from_pins list
to_pins list

EXAMPLES
The followingexampleannotatesacelldelayof20unitsbetweeninputpin A of cell
instance U1/U2/U3 and output pin Z of the same cell instance. The delay value of 20
includes the load delay.
prompt> set_annotated_delay -cell-load_delaycell20\
-from U1/U2/U3/A-toU1/U2/U3/Z
The following example annotates a rise net delay of 1.4 units between output pin U1/
Z and input pin U2/A. The delay value for this net does not include load delay.
prompt> set_annotated_delay -net-rise-load_delaycell1.4\
-from U1/Z-toU2/A
The following example annotates a rise net delay of 12.3 units for minimum delay
analysis betweenthesameoutputpins.Inthiscasethenetdelayvaluedoesinclude
load delay.
prompt> set_annotated_delay -net-rise-min-load_delaynet12.3\
-from U1/Z-toU2/A

我不是要在constraint 設delay 值,而是想實際用buf or delay 去墊出一個我想要的delay,
稍不準也沒關係

那就insert_buffer啊，选用驱动能力比较小的
然后可以从以前的report中大概看出这个cell的迟延值大约有多大