diff options
| author | Eddie Hung <eddie@fpgeh.com> | 2019-10-05 08:53:01 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-10-05 08:53:01 -0700 |
| commit | ebb059896a55efacf1d90f78dbd25faff30969e2 (patch) | |
| tree | 8a3cb3c6e6341bdcda53e55dff4be293c2aa73d4 /passes/pmgen | |
| parent | 6c5e1234e19159b7577a5e64a7a463142160f7ff (diff) | |
| download | yosys-ebb059896a55efacf1d90f78dbd25faff30969e2.tar.gz yosys-ebb059896a55efacf1d90f78dbd25faff30969e2.tar.bz2 yosys-ebb059896a55efacf1d90f78dbd25faff30969e2.zip | |
Add note on pattern detector
Diffstat (limited to 'passes/pmgen')
| -rw-r--r-- | passes/pmgen/xilinx_dsp.pmg | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/passes/pmgen/xilinx_dsp.pmg b/passes/pmgen/xilinx_dsp.pmg index 77d4850d4..09d94ff4b 100644 --- a/passes/pmgen/xilinx_dsp.pmg +++ b/passes/pmgen/xilinx_dsp.pmg @@ -44,9 +44,13 @@ // DSP48E1 cells inferred from multiply operations by Yosys, as well as for // user instantiations that may already contain the cells being packed... // (though the latter is currently untested) -// - Since the $dff-with-clock-enable-or-reset-mux pattern is used for each -// *REG match, it has been factored out into two subpatterns: in_dffe -// out_dffe located at the bottom of this file +// - Since the $dff-with-optional-clock-enable-or-reset-mux pattern is used +// for each *REG match, it has been factored out into two subpatterns: +// in_dffe and out_dffe located at the bottom of this file. +// - Matching for pattern detector features is currently incomplete. For +// example, matching for underflow as well as overflow detection is +// possible, as would auto-reset, enabling saturated arithmetic, detecting +// custom patterns, etc. pattern xilinx_dsp_pack |