九讲DCTCL介绍

Converting from dc_shell to dc_shell-t
9-6
For users who wish to migrate from "old" dc_shell to DC-Tcl, an automated program has been written
UNIX% dc-transcript my_script.scr my_script.tcl
DC Tcl - Introduction
Synopsys 31833-000-S16 Chip Synthesis Workshop
Reading in Designs Constraining a Design Compiling a Design
9-2
DC Tcl - Introduction
Synopsys 31833-000-S16 Chip Synthesis Workshop
Tired of Working?
Man, I'm tired of sitting at this terminal. I sure wish I could have my compile done automatically. DC-Tcl script!!
set_input_delay [-clock clock_name] [-clock_fall] [-level_sensitive] [-rise] [-fall] [-max] [-min] [-add_delay] delay_value port_pin_list
9-10
# set_input_delay (relative clock) (delay is relative to falling edge of clock) (delay is from level-sensitive latch) (specifies rising delay) (specifies falling delay) (specifies maximum delay) (specifies minimum delay) (don't remove existing input delay) (path delay) (list of ports and/or pins)
DC Tcl - Introduction
Synopsys 31833-000-S16 Chip Synthesis Workshop
Getting Help
To Get a Basic Summary of all DC-Tcl Commands
9-8
dc_shell-t> dc_shell-t> help help Procedures: Procedures: Builtins: Builtins: after, after, alias, alias, append, append, apropos, apropos, array, array, break, break, catch, catch, cd, cd, clock, clock, close, close, concat, concat, continue, continue, create_command_group, create_command_group, define_proc_attributes, define_proc_attributes, echo, echo, eof, eof, error, error, error_info, error_info, eval, eval, exec, exec, exit, exit, expr, expr, fblocked, fblocked, fconfigure, fconfigure,
. .. .. .
Default Default Command Command Group: Group: add_module, add_module, add_to_collection, add_to_collection, all_clocks, all_clocks, all_cluster_cells, all_cluster_cells, all_clusters, all_clusters, all_connected, all_connected, all_critical_cells, all_critical_cells, all_critical_pins, all_critical_pins, all_designs, all_designs, all_inputs, all_inputs, all_outputs, all_outputs, all_registers, all_registers, analyze, analyze, balance_buffer, balance_buffer, balance_registers, balance_registers, bc_check_design, bc_check_design,
much more extensive online help lists AND arrays are supported user-defined procedures case construct, string manipulation and comparison, file manipulation more
Executing DC-Tcl Script
There are two ways to execute commands in DC-Tcl: Interactively from DC-Tcl:
dc_shell-t> dc_shell-t> source source my.tcl my.tcl
DC Tcl - Introduction
Synopsys 31833-000-S16 Chip Synthesis Workshop
Why Tcl?
Tcl is becoming an industry standard for tools Tcl is more powerful than dc_shell
. .. .. .
DC Tcl - Introduction
Synopsys 31833-000-S16 Chip Synthesis Workshop
Getting Help (cont)
9-9
Use a Wildcard to Find a Command
dc_shell-t> dc_shell-t> help help *clock *clock clock # clock # Builtin Builtin create_clock # create_clock # create_clock create_clock create_test_clock # create_test_clock # create_test_clock create_test_clock remove_clock # remove_clock # remove_clock remove_clock remove_propagated_clock remove_propagated_clock # # remove_propagated_clock remove_propagated_clock report_clock # report_clock # report_clock report_clock set_propagated_clock # set_propagated_clock # set_propagated_clock set_propagated_clock
9-3
DC Tcl - Introduction
Synopsys 31833-000-S16 Chip Synthesis Workshop
What is Tcl?
Tcl = Tool Command Language
An "open", indusped at UCA Berkeley
Will convert most commands in existing scripts to Tcl Only goes from DCSH to DC-Tcl Called from the UNIX prompt
DC Tcl - Introduction
Synopsys 31833-000-S16 Chip Synthesis Workshop
9-5
Synopsys tools that use Tcl for consistency:
Design Compiler Formality PrimeTime Physical Compiler Chip Architect, etc…
DC Tcl - Introduction
Synopsys 31833-000-S16 Chip Synthesis Workshop
Synopsys 31833-000-S16 Chip Synthesis Workshop
Unit Objectives
After completing this unit, you should be able to: Use online help to determine the syntax of a command Define data types supported by DC-Tcl Use DC-Tcl to assign a value to variables Write a simple DC-Tcl script to automate common DC tasks, including:
9-4
Offers many powerful “C-shell” style features References: