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Synthesis
Nicolai Mueller edited this page Dec 8, 2022
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All examples are based on designs synthesized by NANG45 standard cell library and Synopsis Design Compiler. The following commands (for synthesis script) can be used to restrict the resulting netlist to only those cells which are supported by PROLEAD.
set_dont_use [get_lib_cells NangateOpenCellLibrary/FA*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/HA*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/AOI*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/OAI*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/MUX*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/CLKBUF*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/OR3*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/OR4*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/OR5*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/NOR3*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/NOR4*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/NOR5*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/XNOR3*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/XNOR4*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/XNOR5*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/XOR3*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/XOR4*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/XOR5*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/AND3*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/AND4*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/AND5*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/NAND3*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/NAND4*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/NAND5*]
set_dont_use [get_lib_cells NangateOpenCellLibrary/BUF*]
The flowing commands can be used to force the synthesizer to compile, keep the hierarchy and make a flattened netlist of the design. PROLEAD can handle flattened and non-flattened netlists. Hence, flattening the netlist is optional.
compile -map_effort medium -area_effort medium # Compile
compile_ultra -no_autoungroup # Keep the hierarchy
ungroup -all -flatten # Flatten netlist (optional)