synth_design - 2022.1 English

Vivado Design Suite User Guide: Implementation (UG904)

Document ID
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2022.1 English

The synth_design command can be used in both Project Mode and Non-Project Mode. It runs Vivado synthesis on RTL sources with the specified options, and reads the design into memory after synthesis.

synth_design Syntax

synth_design	[-name <arg>] [-part <arg>] [-constrset <arg>] [-top <arg>]
					[-include_dirs <args>] [-generic <args>] [-verilog_define <args>] 
					[-flatten_hierarchy <arg>] [-gated_clock_conversion <arg>]
					[-directive <arg>] [-rtl] [-bufg <arg>] [-no_lc]
					[-shreg_min_size <arg>] [-mode <arg>] [-fsm_extraction <arg>] 
					[-rtl_skip_mlo] [-rtl_skip_ip] [-rtl_skip_constraints]
					[-srl_style <arg>] [-keep_equivalent_registers] 
					[-resource_sharing <arg>] [-cascade_dsp <arg>]
					[-control_set_opt_threshold <arg>] [-incremental <arg>] 
					[-max_bram <arg>] [-max_uram <arg>] [-max_dsp <arg>]
					[-max_bram_cascade_height <arg>] [-max_uram_cascade_height <arg>] 
					[-retiming] [-no_srlextract] [-assert] [-no_timing_driven]
					[-sfcu] [-debug_log] [-quiet] [-verbose]

synth_design Example Script

The following is an excerpt from the create_bft_batch.tcl script found in the examples/Vivado_Tutorials directory of the software installation.

# Setup design sources and constraints
read_vhdl -library bftLib [ glob ./Sources/hdl/bftLib/*.vhdl ] 
read_vhdl ./Sources/hdl/bft.vhdl
read_verilog	[ glob ./Sources/hdl/*.v ] 
read_xdc ./Sources/bft_full.xdc

# Run synthesis, report utilization and timing estimates, write design checkpoint 
synth_design -top bft -part xc7k70tfbg484-2 -flatten rebuilt
write_checkpoint -force $outputDir/post_synth

For more information on using the synth_design example script, see the Vivado Design Suite Tutorial: Design Flows Overview (UG888) and the Vivado Design Suite User Guide: Synthesis (UG901).

The synth_design example script reads VHDL and Verilog files, reads a constraint file, and synthesizes the design on the specified part. The design is opened by the Vivado tools into memory when synth_design completes. A design checkpoint is written after completing synthesis.

For more information on the synth_design Tcl command, see Vivado Design Suite Tcl Command Reference Guide (UG835). This reference guide also provides a complete description of the Tcl commands and their options.