common_cts_settings_icc.tcl

synopsys icc 使用参考脚本

## ICC RM Version: B-2008.09        

echo "\tLoading :\t\t [which [info script]]"

## CTS Common Session Options - set in place_opt and clock_opt sessions



## Best Practices - User must set or comment out

## Clock Tree References
## Choose Balanced Buffers and Inverters for best results
## Avoid low strengths for initial CTS (bad CTS)
## Avoid high strengths for signal EM problems
## Each of the following take a space separated list of buffers/cels: ex: "buf1 inv1 inv2"

if {$ICC_CTS_REF_LIST != ""} {set_clock_tree_references -references $ICC_CTS_REF_LIST}
if {$ICC_CTS_REF_DEL_INS_ONLY != ""} {set_clock_tree_references -delay_insertion_only -references $ICC_CTS_REF_DEL_INS_ONLY}
if {$ICC_CTS_REF_SIZING_ONLY != ""} {set_clock_tree_references -sizing_only -references $ICC_CTS_REF_SIZING_ONLY}

## CLOCK NDR's
## Specify the rule prior to CTS so that CTS can predict its effects
## Avoid setting the rule on metal 1 - avoids pin access issues on 
## buffers and gates in the tree

# set ICC_CTS_RULE_NAME "my_clock_routing_rule"
## Create Clock NDR - only if it hasn't been created yet - check if rule exists first

#redirect -var x {report_routing_rules $ICC_CTS_RULE_NAME}
#if {$ICC_CTS_RULE_NAME != "" && [regexp "Info: No nondrule" $x]} {
# define_routing_rule $ICC_CTS_RULE_NAME -default_reference_rule \
#       -spacings "BEST_PRACTICE_clock_ndr_metal_layer_and_spacing" \
#       -widths "BEST_PRACTICE_clock_ndr_metal_layer_and_width" \
#       -via_cuts "BEST_PRACTICE_clock_ndr_via_name_and_mXn_pairs"
#report_routing_rule $ICC_CTS_RULE_NAME

## at 65 nm, better SI protection if you put NDR on sink, provided you 
## don't set the NDR on pin access layers
## otherwise set -use_default_routeing_for_sinks to 1 to avoid NDR on 
## clock sink
## set_clock_tree_options -routing_rule $ICC_CTS_RULE_NAME -use_default_routing_for_sinks 1
#}

##Typically route clocks on metal3 and above
if {$ICC_CTS_LAYER_LIST != ""} {set_clock_tree_options -layer_list $ICC_CTS_LAYER_LIST}



## Inter Clock Delay Options 
## Must also edit clock_opt_icc.tcl script and set -inter_clock_balance on the clock_opt -only_cts line
# set_inter_clock_delay_options -balance_group <balance_group> -target_delay_clock <target_delay_clock> -target_delay_value <target_delay_value> -delay_offset <delay_offset> -offset_to <offset_to> -offset_from <offset_from>


## End of CTS Optimization Sesssion Options #############