riscv
/
yosys
mirror of https://github.com/YosysHQ/yosys.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Add note on pattern detector

This commit is contained in:
Eddie Hung 2019-10-05 08:53:01 -07:00
parent 6c5e1234e1
commit ebb059896a
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
passes/pmgen/xilinx_dsp.pmg
View File

@ -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