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hdlc_receive_code.rar

x2005.09  Synopsys Inc. 1988-2005. All rights reserved.       2-1

report_timing        2.  Synopsys Commands      Command Reference

NAME
          report_timing  Displays timing information about a
                         design.

SYNTAX
          int report_timing
                 [-to to_list]
                 [-from from_list]
                 [-through through_list]
                 [-path short | full | full_clock | only | end]
                 [-delay min | min_rise | min_fall | max | max_rise | max_fall]
                 [-nworst paths_per_endpoint]
                 [-max_paths max_path_count]
                 [-input_pins]
                 [-nets]
                 [-transition_time]
                 [-crosstalk_delta]
                 [-capacitance]
                 [-attributes]
                 [-locations]
                 [-physical]
                 [-lesser_path max_path_delay]
                 [-greater_path min_path_delay]
                 [-loops]
                 [-true [-true_threshold path_delay] ]
                 [-justify]
                 [-enable_preset_clear_arcs]
                 [-significant_digits digits]
                 [-nosplit]
                 [-sort_by group|slack]
                 [-group group_name]
                 [-trace_latch_borrow]
                 [-derate]

  Data Types
          to_list              list
          from_list            list
          through_list         list
          paths_per_endpoint   integer
          max_path_count       integer
          max_path_delay       float
          min_path_delay       float
          path_delay           float
          digits               integer
          group_name           string

ARGUMENTS
          -to to_list    Reports only the paths to the named
                         pins, ports, or clocks.  If you do not

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Command Reference    2.  Synopsys Commands          report_timing

                         specify -to, the default is to report
                         the longest path to an output port if
                         the design has no timing constraints. If
                         the design has timing constraints, the
                         default is to report the path with the
                         worst slack within each path group if
                         -group is not present.  If -group is
                         given, the default is to report the path
                         with the worst slack within the group
                         specified by -group.

          -from from_list
                         Reports only the paths from the named
                         pins, ports, or clocks.  If you do not
                         specify -from, the default is to report
                         the longest path to an output port if
                         the design has no timing constraints.
                         If the design has timing constraints,
                         the default is to report the path with
                         the worst slack within each path group
                         if -group is not present.  If -group is
                         given, the default is to report the path
                         with the worst slack within the group
                         specified by -group.

          -through through_list
                         Reports only the paths through the named
                         pins.  The reported paths pass through
                         all pins specified in the through_list.
                         If you do not specify -through, the
                         default is to report the longest path to
                         an output port if the design has no
                         timing constraints.  If the design does
                         have timing constraints, the default is
                         to report the path with the worst slack
                         within each path group if -group is not
                         present.  If -group is given, the
                         default is to report the path with the
                         worst slack within the group specified
                         by -group.

          -path short | full | full_clock | only | end
                         Specifies how to display the timing
                         path.  By default, the full path is
                         displayed.  If full_clock is specified,
                         the report is similar to the report you
                         get with full but also reports the full
                         clock paths for propagated clocks.  If
                         you specify short, only start and end

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report_timing        2.  Synopsys Commands      Command Reference

                         points are displayed.  If you specify
                         only, only the path is displayed without
                         the accompanying required-time and slack
                         calculation.  If you specify end, the
                         report has a column format that shows
                         one line for each path, showing only the
                         endpoint path total, required-time, and
                         slack.

          -
                         delay min | min_rise | min_fall | max | max_rise | max_fall
                         Specifies the path type at the endpoint.
                         The default is max.

          -nworst paths_per_endpoint
                         Specifies the number of paths to report
                         per endpoint.  The default is 1.

          -max_paths max_path_count
                         Specifies the number of paths to report
                         per path group.  The default is 1.

          -input_pins    Shows input pins in the path report.
                         The default is to show only output pins.
                         This option also shows the delays of the
                         nets connected to these pins.

          -nets          Shows nets in the path report.  The
                         default is not to show nets.  To show
                         the delay for the nets, use the
                         -input_pins option.

          -transition_time
                         Shows the net transition time for each
                         driving pin in the path report.  The
                         default is not to show the net
                         transition time for each driving pin.

          -crosstalk_delta
                         Shows the delta delay for each input pin
                         in the path report.  The default is not
                         to show the delta delay for each input
                         pin.

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Command Reference    2.  Synopsys Commands          report_timing

          -capacitance   Indicates that total (lump) capacitance
                         be shown in the path report.  The
                         default is not to show capacitance.  For
                         each driver pin, the the total
                         capacitance driven by the driver is
                         displayed in a column preceding both
                         incremental path delay and transition
                         time (specified with -transition_time).
                         When -nets is specified, the capacitance
                         is printed on the lines with nets
                         instead of the lines with driver pins.

          -attributes    Shows the attributes specified in the
                         timing_report_attributes variable.  The
                         current set of attributes supported are
                         dont_touch, dont_use, map_only, and
                         size_only for cells, and dont_touch and
                         ideal_net for nets.

          -locations     This option is obsolete. Unless you need
                         it for backward compatibility, use the
                         -physical option instead.

          -physical      Shows the locations of the pins and the
                         capacitive loads for the pins and nets
                         in the path report.  The loads are
                         displayed as a pair of values with the
                         first value being the wire capacitance
                         of the net and the second value being
                         the total capacitance driven by the
                         driver.  If the pin location cannot be
                         determined, the cell location is
                         displayed, with the coordinates in
                         microns.

          -lesser_path max_path_delay
                         Selects only those paths with a delay
                         less than max_path_delay.  Combine this
                         option with the -greater_path option to
                         select only those paths inside or
                         outside a given delay range.

          -greater_path min_path_delay
                         Selects only those paths with a delay
                         greater than min_path_delay.  Combine
                         this option with the -lesser_path option
                         to select only those paths inside or

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report_timing        2.  Synopsys Commands      Command Reference

                         outside a given delay range.

          -loops         Reports only the timing loops in the
                         design.

          -true          Reports the longest (least-slack) true
                         paths in the design.  This option can
                         require long runtimes for certain
                         designs that have many false paths.  Use
                         the
                         true_delay_prove_true_backtrack_limit
                         and
                         true_delay_prove_false_backtrack_limit
                         variables to limit the amount of
                         backtracking during the operation of
                         report_timing -true.  Use the
                         set_true_delay_case_analysis command to
                         specify a partial input vector to be
                         considered for -true analysis.  You
                         cannot combine -true with the
                         -max_paths(>1), -nworst(>1),
                         -lesser_path, -greater_path, -loops, or
                         -delay (path type other than max)
                         options.  This option requires a DC
                         Ultra license.