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| author | Eddie Hung <eddie@fpgeh.com> | 2019-04-26 16:28:48 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-04-26 16:28:48 -0700 |
| commit | ccc283737d99cb0f4d5742692d5d86c4ad9396c6 (patch) | |
| tree | faeb7665cb3703c2bea1eb9478236dc2f29a7afa /techlibs/xilinx | |
| parent | e31e21766d3bf323ce61754a28ac58ec7118b9c0 (diff) | |
| download | yosys-ccc283737d99cb0f4d5742692d5d86c4ad9396c6.tar.gz yosys-ccc283737d99cb0f4d5742692d5d86c4ad9396c6.tar.bz2 yosys-ccc283737d99cb0f4d5742692d5d86c4ad9396c6.zip | |
Apparently, this reduces number of MUXCY/XORCY
Diffstat (limited to 'techlibs/xilinx')
| -rw-r--r-- | techlibs/xilinx/synth_xilinx.cc | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc index 5652806f7..4ec115bec 100644 --- a/techlibs/xilinx/synth_xilinx.cc +++ b/techlibs/xilinx/synth_xilinx.cc @@ -287,11 +287,18 @@ struct SynthXilinxPass : public Pass if (check_label(active, run_from, run_to, "fine")) { - Pass::call(design, "opt -fast"); + Pass::call(design, "opt -fast -full"); Pass::call(design, "memory_map"); Pass::call(design, "dffsr2dff"); Pass::call(design, "dff2dffe"); + if (!nocarry) { + if (vpr) + Pass::call(design, "techmap -D _EXPLICIT_CARRY -map +/xilinx/arith_map.v"); + else + Pass::call(design, "techmap -map +/xilinx/arith_map.v"); + } + // shregmap -tech xilinx can cope with $shiftx and $mux // cells for identifying variable-length shift registers, // so attempt to convert $pmux-es to the former @@ -300,15 +307,7 @@ struct SynthXilinxPass : public Pass Pass::call(design, "pmux2shiftx"); Pass::call(design, "opt -full"); - if (!nocarry) { - if (vpr) - Pass::call(design, "techmap -map +/techmap.v -D _EXPLICIT_CARRY -map +/xilinx/arith_map.v"); - else - Pass::call(design, "techmap -map +/techmap.v -map +/xilinx/arith_map.v"); - } - else { - Pass::call(design, "techmap"); - } + Pass::call(design, "techmap"); Pass::call(design, "opt -fast"); // shregmap with '-tech xilinx' infers variable length shift regs |