diff --git a/openfpga_flow/misc/ys_tmpl_yosys_vpr_bram_dsp_dff_flow.ys b/openfpga_flow/misc/ys_tmpl_yosys_vpr_bram_dsp_dff_flow.ys new file mode 100644 index 000000000..7244532e5 --- /dev/null +++ b/openfpga_flow/misc/ys_tmpl_yosys_vpr_bram_dsp_dff_flow.ys @@ -0,0 +1,105 @@ +# Yosys synthesis script for ${TOP_MODULE} + +######################### +# Parse input files +######################### +# Read verilog files +${READ_VERILOG_FILE} +# Read technology library +read_verilog -lib -specify ${YOSYS_CELL_SIM_VERILOG} + +######################### +# Prepare for synthesis +######################### +# Identify top module from hierarchy +hierarchy -check -top ${TOP_MODULE} +# - Convert process blocks to AST +proc +# Flatten all the gates/primitives +flatten +# Identify tri-state buffers from 'z' signal in AST +# with follow-up optimizations to clean up AST +tribuf -logic +opt_expr +opt_clean +# demote inout ports to input or output port +# with follow-up optimizations to clean up AST +deminout +opt + +opt_expr +opt_clean +check +opt +wreduce -keepdc +peepopt +pmuxtree +opt_clean + +######################## +# Map multipliers +# Inspired from synth_xilinx.cc +######################### +# Avoid merging any registers into DSP, reserve memory port registers first +memory_dff +wreduce t:$mul +techmap -map +/mul2dsp.v -map ${YOSYS_DSP_MAP_VERILOG} ${YOSYS_DSP_MAP_PARAMETERS} +select a:mul2dsp +setattr -unset mul2dsp +opt_expr -fine +wreduce +select -clear +chtype -set $mul t:$__soft_mul# Extract arithmetic functions + +######################### +# Run coarse synthesis +######################### +# Run a tech map with default library +techmap +alumacc +share +opt +fsm +# Run a quick follow-up optimization to sweep out unused nets/signals +opt -fast +# Optimize any memory cells by merging share-able ports and collecting all the ports belonging to memorcy cells +memory -nomap +opt_clean + +######################### +# Map logics to BRAMs +######################### +memory_bram -rules ${YOSYS_BRAM_MAP_RULES} +techmap -map ${YOSYS_BRAM_MAP_VERILOG} +opt -fast -mux_undef -undriven -fine +memory_map +opt -undriven -fine + +######################### +# Map flip-flops +######################### +techmap -map ${YOSYS_DFF_MAP_VERILOG} +opt_expr -mux_undef +simplemap +opt_expr +opt_merge +opt_rmdff +opt_clean +opt + +######################### +# Map LUTs +######################### +abc -lut ${LUT_SIZE} + +######################### +# Check and show statisitics +######################### +hierarchy -check +stat + +######################### +# Output netlists +######################### +opt_clean -purge +write_blif ${OUTPUT_BLIF}