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[Arch] Patch QLSOFA architecture to support carry chain pattern; Still buggy for VPR packer; Looking for a solution

This commit is contained in:
tangxifan 2021-02-03 11:20:56 -07:00
parent 4c825b27b3
commit cac1160bf7
1 changed files with 27 additions and 8 deletions
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35
openfpga_flow/vpr_arch/k4_frac_N8_tileable_reset_softadder_register_scan_chain_nonLR_caravel_io_skywater130nm.xml
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@ -417,6 +417,9 @@
<input name="b" num_pins="1"/>
<input name="cin" num_pins="1"/>
<output name="cout" num_pins="1"/>
<delay_constant max="0.3e-9" in_port="carry_follower.a" out_port="carry_follower.cout"/>
<delay_constant max="0.3e-9" in_port="carry_follower.b" out_port="carry_follower.cout"/>
<delay_constant max="0.3e-9" in_port="carry_follower.cin" out_port="carry_follower.cout"/>
</pb_type>
<interconnect>
<direct name="direct1" input="frac_logic.in[0:1]" output="frac_lut4.in[0:1]"/>
@ -522,15 +525,28 @@
</pb_type>
<interconnect>
<direct name="direct1" input="soft_adder.in[0:1]" output="adder_lut4.in[0:1]"/>
<direct name="direct2" input="soft_adder.cin" output="adder_lut4.in[2:2]"/>
<direct name="direct3" input="soft_adder.in[3:3]" output="adder_lut4.in[3:3]"/>
<direct name="direct4" input="soft_adder.cin" output="carry_follower.b"/>
<direct name="direct5" input="adder_lut4.lut2_out[1:1]" output="carry_follower.a"/>
<direct name="direct6" input="adder_lut4.lut2_out[0:0]" output="carry_follower.cin"/>
<direct name="direct7" input="carry_follower.cout" output="soft_adder.cout"/>
<direct name="direct8" input="adder_lut4.lut4_out[0:0]" output="ff[0:0].D"/>
<direct name="direct2" input="soft_adder.in[3:3]" output="adder_lut4.in[3:3]"/>
<direct name="direct3" input="soft_adder.cin" output="carry_follower.b">
<pack_pattern name="chain" in_port="soft_adder.cin" out_port="carry_follower.b"/>
</direct>
<direct name="direct4" input="adder_lut4.lut2_out[1:1]" output="carry_follower.a">
<pack_pattern name="chain" in_port="adder_lut4.lut2_out[1:1]" out_port="carry_follower.a"/>
</direct>
<direct name="direct5" input="adder_lut4.lut2_out[0:0]" output="carry_follower.cin">
<!--pack_pattern name="chain" in_port="adder_lut4.lut2_out[0:0]" out_port="carry_follower.cin"/-->
</direct>
<direct name="direct6" input="carry_follower.cout" output="soft_adder.cout">
<pack_pattern name="chain" in_port="carry_follower.cout" out_port="soft_adder.cout"/>
</direct>
<direct name="direct7" input="adder_lut4.lut4_out[0:0]" output="ff[0:0].D">
<pack_pattern name="ble" in_port="adder_lut4.lut4_out[0:0]" out_port="ff[0:0].D"/>
</direct>
<complete name="complete1" input="soft_adder.clk" output="ff[0:0].clk"/>
<mux name="mux1" input="adder_lut4.lut4_out[0:0] ff[0:0].Q" output="soft_adder.out[0:0]">
<mux name="mux1" input="soft_adder.cin soft_adder.in[2:2]" output="adder_lut4.in[2:2]">
<delay_constant max="25e-12" in_port="soft_adder.cin" out_port="adder_lut4.in[2:2]"/>
<delay_constant max="45e-12" in_port="soft_adder.in[2:2]" out_port="adder_lut4.in[2:2]"/>
</mux>
<mux name="mux2" input="adder_lut4.lut4_out[0:0] ff[0:0].Q" output="soft_adder.out[0:0]">
<delay_constant max="25e-12" in_port="adder_lut4.lut4_out[0:0]" out_port="soft_adder.out[0:0]"/>
<delay_constant max="45e-12" in_port="ff[0:0].Q" out_port="soft_adder.out[0:0]"/>
</mux>
@ -790,11 +806,14 @@
<!-- Carry chain links -->
<direct name="carry_chain_in" input="clb.cin" output="fle[0:0].cin">
<!-- Put all inter-block carry chain delay on this one edge -->
<pack_pattern name="chain" in_port="clb.cin" out_port="fle[0:0].cin"/>
<delay_constant max="0.16e-9" in_port="clb.cin" out_port="fle[0:0].cin"/>
</direct>
<direct name="carry_chain_out" input="fle[7:7].cout" output="clb.cout">
<pack_pattern name="chain" in_port="fle[7:7].cout" out_port="clb.cout"/>
</direct>
<direct name="carry_chain_link" input="fle[6:0].cout" output="fle[7:1].cin">
<pack_pattern name="chain" in_port="fle[6:0].cout" out_port="fle[7:1].cin"/>
</direct>
</interconnect>
<!-- Every input pin is driven by 15% of the tracks in a channel, every output pin is driven by 10% of the tracks in a channel -->