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| author | Eddie Hung <eddie@fpgeh.com> | 2019-08-23 12:22:46 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-08-23 12:22:46 -0700 |
| commit | 08139aa53ab2aa7916c9c42fab9bf6261621c265 (patch) | |
| tree | 6a336729b5eca78ab27ecda8ec6cf2fb857199be | |
| parent | 18b64609c25313c73ac18af1c5963bf830f95dba (diff) | |
| download | yosys-08139aa53ab2aa7916c9c42fab9bf6261621c265.tar.gz yosys-08139aa53ab2aa7916c9c42fab9bf6261621c265.tar.bz2 yosys-08139aa53ab2aa7916c9c42fab9bf6261621c265.zip | |
xilinx_srl now copes with word-level flops $dff{,e}
| -rw-r--r-- | techlibs/xilinx/synth_xilinx.cc | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/techlibs/xilinx/synth_xilinx.cc b/techlibs/xilinx/synth_xilinx.cc index 8bf43bf97..5e9cd8a0e 100644 --- a/techlibs/xilinx/synth_xilinx.cc +++ b/techlibs/xilinx/synth_xilinx.cc @@ -265,9 +265,8 @@ struct SynthXilinxPass : public ScriptPass if (widemux > 0 || help_mode) run("muxpack", " ('-widemux' only)"); - // 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 + // xilinx_srl looks for $shiftx cells for identifying variable-length + // shift registers, so attempt to convert $pmux-es to this // Also: wide multiplexer inference benefits from this too if (!(nosrl && widemux == 0) || help_mode) { run("pmux2shiftx", "(skip if '-nosrl' and '-widemux=0')"); @@ -349,12 +348,8 @@ struct SynthXilinxPass : public ScriptPass } run("opt -full"); - if (!nosrl || help_mode) { - // shregmap operates on bit-level flops, not word-level, - // so break those down here - run("simplemap t:$dff t:$dffe", " (skip if '-nosrl')"); + if (!nosrl || help_mode) run("xilinx_srl -variable -minlen 3", "(skip if '-nosrl')"); - } std::string techmap_args = " -map +/techmap.v"; if (help_mode) |