The counting direction of multiple cycle clock is listed as below. Note that in single clock domain design there is no meaning to the -start and -end flags.
-setup -end -->
-hold -start -->
<-- -setup -start
<-- -hold -end
For examples:
Check out more technology details about multiple cycle clock setting here.
Following scripts disable the default clock gating check on those cells with name Cxxx.
set cg_pins [get_pins -hier "*" -filter "is_clock_gating_pin==true && is_data_pin==true"]
foreach_in_collection cg_cell [get_cells -of_object $cg_pins] {
set cell_name [get_object_name $cg_cell]
if { [regexp {\/C\d+$} $cell_name] } {
echo "Found CG cell: $cell_name"
set_disable_clock_gating_check [get_cells $cg_cell]
}
}