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28 Commits

Author SHA1 Message Date
whitequark 7191dd16f9 Use C++11 final/override keywords. 2020-06-18 23:34:52 +00:00
Xiretza edd8ff2c07
Add flooring division operator 
The $div and $mod cells use truncating division semantics (rounding
towards 0), as defined by e.g. Verilog. Another rounding mode, flooring
(rounding towards negative infinity), can be used in e.g. VHDL. The
new $divfloor cell provides this flooring division.

This commit also fixes the handling of $div in opt_expr, which was
previously optimized as if it was $divfloor.
 2020-05-28 22:59:04 +02:00
Xiretza 17163cf43a
Add flooring modulo operator 
The $div and $mod cells use truncating division semantics (rounding
towards 0), as defined by e.g. Verilog. Another rounding mode, flooring
(rounding towards negative infinity), can be used in e.g. VHDL. The
new $modfloor cell provides this flooring modulo (also known as "remainder"
in several languages, but this name is ambiguous).

This commit also fixes the handling of $mod in opt_expr, which was
previously optimized as if it was $modfloor.
 2020-05-28 22:59:03 +02:00
Eddie Hung 956ecd48f7 kernel: big fat patch to use more ID::*, otherwise ID(*) 2020-04-02 09:51:32 -07:00
Eddie Hung fdafb74eb7 kernel: use more ID::* 2020-04-02 07:14:08 -07:00
Eddie Hung 6d77236f38 substr() -> compare() 2019-08-07 12:20:08 -07:00
Clifford Wolf 023086bd46 Add $_NMUX_, add "abc -g cmos", add proper cmos cell costs 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-06 04:47:55 +02:00
Clifford Wolf f4abc21d8a Add "whitebox" attribute, add "read_verilog -wb" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-18 17:45:47 +02:00
Aman Goel 749b3ed62a Minor update 2018-10-15 13:54:12 -04:00
Aman Goel 90e0938f9a Update to .smv backend 
Splitting VAR and ASSIGN into IVAR, VAR, DEFINE and ASSIGN. This allows better handling by nuXmv for post-processing (since now only state variables are listed under VAR).
 2018-10-01 19:03:10 -04:00
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 05cdd58c8d Add $_ANDNOT_ and $_ORNOT_ gates 2017-05-17 09:08:29 +02:00
Clifford Wolf 0bc95f1e04 Added "yosys -D" feature 2016-04-21 23:28:37 +02:00
Clifford Wolf 207736b4ee Import more std:: stuff into Yosys namespace 2015-10-25 19:30:49 +01:00
Clifford Wolf f81bf9bdea Added SMV back-end 'test_cells.sh' script 2015-08-12 12:56:20 +02:00
Clifford Wolf 5dc23975eb Bugfix in SMV back-end for partially unassigned wires 2015-08-05 11:36:26 +02:00
Clifford Wolf c7fd3fbb68 Added $assert support to SMV back-end 2015-08-04 20:05:37 +02:00
Clifford Wolf 6c84341f22 Fixed trailing whitespaces 2015-07-02 11:14:30 +02:00
Clifford Wolf 3123c45415 Added init support to SMV back-end 2015-06-19 16:43:02 +02:00
Clifford Wolf 6c6bf4999e Progress in SMV back-end 2015-06-19 16:26:53 +02:00
Clifford Wolf 8c79765de5 Progress in SMV back-end 2015-06-19 14:08:46 +02:00
Clifford Wolf 8a86162ae9 Progress in SMV back-end 2015-06-18 16:29:11 +02:00
Clifford Wolf 8e84418225 Progress in SMV back-end 2015-06-17 09:56:42 +02:00
Clifford Wolf 9f7a5b4ef9 Progress in SMV back-end 2015-06-17 07:24:27 +02:00
Clifford Wolf b8c5e27006 Progress in SMV back-end 2015-06-16 19:05:26 +02:00
Clifford Wolf 52315039c5 Progress in SMV back-end 2015-06-15 17:01:01 +02:00
Clifford Wolf 0f01ef61ef Progress in SMV back-end 2015-06-15 13:24:17 +02:00
Clifford Wolf ea23bb8aa4 Added "write_smv" skeleton 2015-06-15 00:46:27 +02:00