98 lines
2.1 KiB
Plaintext
98 lines
2.1 KiB
Plaintext
# Yosys synthesis script for ${TOP_MODULE}
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#########################
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# Parse input files
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#########################
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# Read verilog files
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${READ_VERILOG_FILE}
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# Read technology library
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read_verilog -lib -specify ${YOSYS_CELL_SIM_VERILOG}
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#########################
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# Prepare for synthesis
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#########################
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# Identify top module from hierarchy
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hierarchy -check -top ${TOP_MODULE}
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# - Convert process blocks to AST
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proc
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# Flatten all the gates/primitives
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flatten
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# Identify tri-state buffers from 'z' signal in AST
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# with follow-up optimizations to clean up AST
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tribuf -logic
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opt_expr
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opt_clean
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# demote inout ports to input or output port
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# with follow-up optimizations to clean up AST
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deminout
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opt -nodffe -nosdff
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opt_expr
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opt_clean
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check
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opt -nodffe -nosdff
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wreduce -keepdc
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peepopt
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pmuxtree
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opt_clean
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########################
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# Map multipliers
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# Inspired from synth_xilinx.cc
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#########################
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# Avoid merging any registers into DSP, reserve memory port registers first
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memory_dff
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wreduce t:$mul
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techmap -map +/mul2dsp.v -map ${YOSYS_DSP_MAP_VERILOG} ${YOSYS_DSP_MAP_PARAMETERS}
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select a:mul2dsp
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setattr -unset mul2dsp
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opt_expr -fine
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wreduce
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select -clear
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chtype -set $mul t:$__soft_mul# Extract arithmetic functions
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#########################
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# Run coarse synthesis
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#########################
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# Run a tech map with default library
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techmap
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alumacc
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share
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opt -nodffe -nosdff
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fsm
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# Run a quick follow-up optimization to sweep out unused nets/signals
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opt -fast -nodffe -nosdff
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# Optimize any memory cells by merging share-able ports and collecting all the ports belonging to memorcy cells
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memory -nomap
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opt_clean
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#########################
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# Map flip-flops
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#########################
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dfflegalize -cell $_DFF_P_ 0
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techmap -map +/adff2dff.v
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opt_expr -mux_undef
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simplemap
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opt_expr
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opt_merge
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opt_dff -nodffe -nosdff
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opt_clean
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opt -nodffe -nosdff
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#########################
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# Map LUTs
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#########################
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abc -lut ${LUT_SIZE}
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#########################
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# Check and show statisitics
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#########################
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hierarchy -check
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stat
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#########################
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# Output netlists
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#########################
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opt_clean -purge
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write_blif -param ${OUTPUT_BLIF}
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