24 commits

Author	SHA1	Message	Date
C-Elegans	84f9cd0025	Optimize compares to powers of 2 ... Remove opt_compare and put comparison pass in opt_expr assuming a [7:0] is unsigned a >= (1<<x) becomes |a[7:x] a < (1<<x) becomes !a[7:x] Additionally: a >= 0 becomes constant true, a < 0 becomes constant false delete opt_compare.cc revert opt.cc to commit b7cfb7dbd (remove opt_compare step)	2017-01-16 13:45:50 -05:00
C-Elegans	943389cdd5	Fix issue #269, optimize signed compare with 0 ... add opt_compare pass and add it to opt for a < 0: if a is signed, replace with a[max_bit-1] for a >= 0: if a is signed, replace with ~a[max_bit-1]	2017-01-15 13:38:29 -05:00
Clifford Wolf	ed519f578e	Added "opt_rmdff -keepdc"	2016-09-30 17:02:38 +02:00
Clifford Wolf	0bc95f1e04	Added "yosys -D" feature	2016-04-21 23:28:37 +02:00
Clifford Wolf	ec93680bd5	Renamed opt_share to opt_merge	2016-03-31 08:52:49 +02:00
Clifford Wolf	1d0f0d668a	Renamed opt_const to opt_expr	2016-03-31 08:46:56 +02:00
Clifford Wolf	6c84341f22	Fixed trailing whitespaces	2015-07-02 11:14:30 +02:00
Clifford Wolf	053058d781	Added opt_const -clkinv	2015-07-01 10:49:21 +02:00
Clifford Wolf	08f9b38a9c	Added opt_share -share_all	2015-05-31 14:24:34 +02:00
Clifford Wolf	9ae21263f0	Some cleanups in "clean"	2015-02-24 22:31:30 +01:00
Clifford Wolf	11c3b81c08	typo fix for "opt -fast"	2014-12-30 22:35:38 +01:00
Clifford Wolf	ab28491f27	Added "opt -full" alias for all more aggressive optimizations	2014-10-31 03:36:51 +01:00
Clifford Wolf	f9a307a50b	namespace Yosys	2014-09-27 16:17:53 +02:00
Clifford Wolf	2a1b08aeb3	Added design->scratchpad	2014-08-30 19:37:12 +02:00
Clifford Wolf	eb17fbade5	Added "opt -fast"	2014-08-16 15:34:15 +02:00
Clifford Wolf	137dbf3cf7	Added "opt_const -keepdc"	2014-07-21 21:38:55 +02:00
Clifford Wolf	1241a9fd50	Added "opt_const -fine" and "opt_reduce -fine"	2014-07-21 16:34:16 +02:00
Clifford Wolf	82c98bbbe6	Added opt -purge (frontend to opt_clean -purge)	2014-02-08 14:21:34 +01:00
Clifford Wolf	594d52e0b6	Added opt_const -undriven	2014-02-06 15:49:03 +01:00
Clifford Wolf	9d0b69edaa	Added opt_const -mux_bool	2014-02-02 22:11:08 +01:00
Clifford Wolf	c32b918681	Renamed opt_rmunused to opt_clean	2013-06-05 07:07:31 +02:00
Clifford Wolf	a338d1a082	Added help messages for fsm_* passes	2013-03-01 12:35:12 +01:00
Clifford Wolf	36954471a6	Added help messages for opt_* passes	2013-03-01 09:01:49 +01:00
Clifford Wolf	7764d0ba1d	initial import	2013-01-05 11:13:26 +01:00