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13 Commits

Author SHA1 Message Date
Peder Bergebakken Sundt 656ee70f8e proc: Add -nomux switch 
running proc -nomux will ommit the proc_mux pass
 2020-08-20 22:58:08 +02:00
whitequark 7191dd16f9 Use C++11 final/override keywords. 2020-06-18 23:34:52 +00:00
whitequark 5fe0ffe30f proc_prune: new pass. 
The proc_prune pass is similar in nature to proc_rmdead pass: while
proc_rmdead removes branches that never become active because another
branch preempts it, proc_prune removes assignments that never become
active because another assignment preempts them.

Genrtlil contains logic similar to the proc_prune pass, but their
purpose is different: genrtlil has to prune assignments to adapt
the semantics of blocking assignments in HDLs (latest assignment
wins) to semantics of assignments in RTLIL processes (assignment in
the most specific case wins). On the other hand proc_prune is
a general purpose RTLIL simplification that benefits all frontends,
even those not using the Yosys AST library.

The proc_prune pass is added to the proc script after proc_rmdead,
since it gives better results with fewer branches.
 2019-07-09 09:30:58 +00:00
Henner Zeller 3aa4484a3c Consistent use of 'override' for virtual methods in derived classes. 
o Not all derived methods were marked 'override', but it is a great
  feature of C++11 that we should make use of.
o While at it: touched header files got a -*- c++ -*- for emacs to
  provide support for that language.
o use YS_OVERRIDE for all override keywords (though we should probably
  use the plain keyword going forward now that C++11 is established)
 2018-07-20 23:51:06 -07:00
Clifford Wolf 2032e6d8e4 Added "proc_mux -ifx" 2016-06-06 17:15:50 +02:00
Clifford Wolf 0bc95f1e04 Added "yosys -D" feature 2016-04-21 23:28:37 +02:00
Clifford Wolf 6c84341f22 Fixed trailing whitespaces 2015-07-02 11:14:30 +02:00
Clifford Wolf 554a8df5e2 Added "proc_dlatch" 2015-02-12 16:56:01 +01:00
Clifford Wolf f9a307a50b namespace Yosys 2014-09-27 16:17:53 +02:00
Clifford Wolf 09471846c5 Major improvements in mem2reg and added "init" sync rules 2013-11-21 13:49:00 +01:00
Clifford Wolf 64a5f8f75e Added "proc_arst -global_arst" feature 2013-11-20 21:00:43 +01:00
Clifford Wolf f952309c81 Added help messages to proc_* passes 2013-03-01 09:26:29 +01:00
Clifford Wolf 7764d0ba1d initial import 2013-01-05 11:13:26 +01:00