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17 Commits

Author SHA1 Message Date
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
Clifford Wolf d05115ceda Minor presentation fixes 2016-05-14 11:35:39 +02:00
Clifford Wolf 0bc95f1e04 Added "yosys -D" feature 2016-04-21 23:28:37 +02:00
Clifford Wolf 84bf862f7c Spell check (by Larry Doolittle) 2015-08-14 10:56:05 +02:00
Clifford Wolf 6c84341f22 Fixed trailing whitespaces 2015-07-02 11:14:30 +02:00
Clifford Wolf 85887de547 Various presentation fixes 2015-02-09 12:02:21 +01:00
Clifford Wolf b9f2127f5d Various documentation updates 2014-11-08 10:59:48 +01:00
Clifford Wolf 8927aa6148 Removed $bu0 cell type 2014-09-04 02:07:52 +02:00
Clifford Wolf f092b50148 Renamed $_INV_ cell type to $_NOT_ 2014-08-15 14:11:40 +02:00
Clifford Wolf 13f2f36884 RIP $safe_pmux 2014-08-14 11:39:46 +02:00
Clifford Wolf 3e96ce8680 Progress in presentation 2014-06-26 22:05:39 +02:00
Clifford Wolf a7aea17959 Progress in presentation 2014-06-22 12:50:29 +02:00
Clifford Wolf 821156b6cf presentation progress 2014-02-06 14:01:43 +01:00
Clifford Wolf 9f6364c1c4 presentation progress 2014-02-05 13:12:50 +01:00
Clifford Wolf e0c867db53 presentation progress 2014-02-04 23:00:48 +01:00
Clifford Wolf 6c3d767976 presentation progress 2014-02-03 16:26:27 +01:00