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yosys
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19 Commits

Author SHA1 Message Date
George Rennie 2cb3b6e9b8 peepopt: add formal only peepopt to rewrite latches to ffs in clock gates 
* this is gated behind the -formalclk flag, which also disables the other
  synthesis focused optimizations
 2024-08-07 10:01:45 +01:00
Philippe Sauter 2f0f10cb87 peepopt: limit padding from shiftadd 
The input to a shift operation is padded.
This reduced the final number of MUX cells
but during techmap it can create huge
temporary multiplexers in the log shifter.
This significantly increases runtime and resources.

A limit is added with a warning when it is used.
 2024-06-14 15:33:03 +02:00
Philippe Sauter b6df900bcc peepopt: Describe `shiftadd` rule in help message 2023-11-06 14:01:37 +01:00
Philippe Sauter 72c6a01e67 peepopt: Add initial `shiftadd` pattern 2023-11-06 14:01:37 +01:00
Martin Povišer 660be4a31e peepopt: Describe rules in help message 2023-10-16 14:19:15 +02:00
Martin Povišer 5c0c8251c3 peepopt: Remove broken `-generate` option 2023-10-16 14:19:10 +02:00
Martin Povišer aa9b86aeec peepopt: Add left-shift 'shiftmul' variant 
Add a separate shiftmul pattern to match on left shifts which implement
demuxing. This mirrors the right shift pattern matcher but is probably
best kept separate instead of merging the two into a single matcher.
In any case the diff of the two matchers should be easily readable.
 2023-10-16 13:52:38 +02:00
Martin Povišer a0c3be3aae peepopt: Drop unused 'initbits' code 
Drop code that was once used by the 'dffmux' pattern but now is unused
after that pattern has been obsoleted by the 'opt_dff' pass.
 2023-10-16 13:52:06 +02:00
Claire Xenia Wolf 72787f52fc Fixing old e-mail addresses and deadnames 
s/((Claire|Xen|Xenia|Clifford)\s+)+(Wolf|Xen)\s+<(claire|clifford)@(symbioticeda.com|clifford.at|yosyshq.com)>/Claire Xenia Wolf <claire@yosyshq.com>/gi;
s/((Nina|Nak|N\.)\s+)+Engelhardt\s+<nak@(symbioticeda.com|yosyshq.com)>/N. Engelhardt <nak@yosyshq.com>/gi;
s/((David)\s+)+Shah\s+<(dave|david)@(symbioticeda.com|yosyshq.com|ds0.me)>/David Shah <dave@ds0.me>/gi;
s/((Miodrag)\s+)+Milanovic\s+<(miodrag|micko)@(symbioticeda.com|yosyshq.com)>/Miodrag Milanovic <micko@yosyshq.com>/gi;
s,https?://www.clifford.at/yosys/,http://yosyshq.net/yosys/,g;
 2021-06-08 00:39:36 +02:00
Marcelina Kościelnicka a0e99a9f3f peepopt: Remove now-redundant dffmux pattern. 2020-08-07 13:21:34 +02:00
whitequark 7191dd16f9 Use C++11 final/override keywords. 2020-06-18 23:34:52 +00:00
Eddie Hung 956ecd48f7 kernel: big fat patch to use more ID::*, otherwise ID(*) 2020-04-02 09:51:32 -07:00
Clifford Wolf b8774ae849 Fix dffmux peepopt init handling 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-10-16 11:40:32 +02:00
Eddie Hung edf90afd20 Rename dffmuxext -> dffmux, also remove constants in dff+mux 2019-09-11 00:56:38 -07:00
Eddie Hung 2b86055848 Add peepopt_dffmuxext 2019-09-04 12:35:15 -07:00
Clifford Wolf e8c5afcb84 Fix typo 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-05-03 08:25:30 +02:00
Clifford Wolf b515fd2d25 Add peepopt_muldiv, fixes #930 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-30 11:25:15 +02:00
Clifford Wolf 4306bebe58 pmgen progress 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-30 10:51:51 +02:00
Clifford Wolf ea547bcaa3 Add "peepopt" skeleton 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-04-29 13:38:56 +02:00