OpenFPGA/openfpga_flow/misc/ys_tmpl_yosys_vpr_adder_flo...

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# Yosys synthesis script for ${TOP_MODULE}
# Read verilog files
read_verilog ${READ_VERILOG_OPTIONS} ${VERILOG_FILES}
# Technology mapping
hierarchy -top ${TOP_MODULE}
proc
techmap -D NO_LUT -map +/adff2dff.v
# Synthesis
flatten
opt_expr
opt_clean
check
opt -nodffe -nosdff
fsm
opt -nodffe -nosdff
wreduce
peepopt
opt_clean
# Map Adders
techmap -map +/techmap.v -map ${YOSYS_ADDER_MAP_VERILOG}
opt -fast -nodffe -nosdff
opt_expr
opt_merge
opt_clean
opt -nodffe -nosdff
#
memory -nomap
opt_clean
opt -fast -full -nodffe -nosdff
memory_map
opt -full -nodffe -nosdff
techmap
opt -fast -nodffe -nosdff
clean
# LUT mapping
abc -lut ${LUT_SIZE}
# Check
#synth -run check
# Clean and output blif
opt_clean -purge
write_blif ${OUTPUT_BLIF}