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read_liberty latch inference disabled by default 

Signed-off-by: James Cherry <cherry@parallaxsw.com>
This commit is contained in:
James Cherry 2023-07-25 17:54:50 -07:00
parent f2bd778277
commit 2500883924
4 changed files with 10 additions and 4 deletions
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4
doc/ChangeLog.txt
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@ -17,6 +17,10 @@ pin activities for power analysis.
The report_cell command has been removed; use report_instance. The report_cell command has been removed; use report_instance.
The read_liberty command latch inference (see OpenSTA.pdf) is now disabled by default.
The -no_latch_infer flag is deprecated.
To enable latch inference, use the -infer_latches flag.
Release 2.3.3 2022/09/24 Release 2.3.3 2022/09/24
------------------------- -------------------------

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doc/OpenSTA.odt
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3
liberty/Liberty.cc
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@ -1301,8 +1301,7 @@ LibertyCell::finish(bool infer_latches,
makeTimingArcPortMaps(); makeTimingArcPortMaps();
findDefaultCondArcs(); findDefaultCondArcs();
makeLatchEnables(report, debug); makeLatchEnables(report, debug);
if (infer_latches if (infer_latches)
&& !interface_timing_)
inferLatchRoles(debug); inferLatchRoles(debug);
} }

7
tcl/Liberty.tcl
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@ -23,13 +23,16 @@ define_cmd_args "read_liberty" \
proc_redirect read_liberty { proc_redirect read_liberty {
parse_key_args "read_liberty" args keys {-corner} \ parse_key_args "read_liberty" args keys {-corner} \
flags {-min -max -no_latch_infer} flags {-min -max -no_latch_infer -infer_latches}
check_argc_eq1 "read_liberty" $args check_argc_eq1 "read_liberty" $args
set filename [file nativename [lindex $args 0]] set filename [file nativename [lindex $args 0]]
set corner [parse_corner keys] set corner [parse_corner keys]
set min_max [parse_min_max_all_flags flags] set min_max [parse_min_max_all_flags flags]
set infer_latches [expr ![info exists flags(-no_latch_infer)]] if { [info exists flags(-no_latch_infer)] } {
sta_warn 625 "-no_latch_infer is deprecated."
}
set infer_latches [info exists flags(-infer_latches)]
read_liberty_cmd $filename $corner $min_max $infer_latches read_liberty_cmd $filename $corner $min_max $infer_latches
} }