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25 Commits

Author SHA1 Message Date
R. Ou 20ce4118da json: Change compat mode to directly emit ints <= 32 bits 
This increases compatibility with certain older parsers in some cases
that worked before commit 15fae357 but do not work with the current
compat-int mode
 2020-02-09 01:01:18 -08:00
Marcin Kościelnicki 00fba62711 json: remove the 32-bit parameter special case 
Before, the rules for encoding parameters in JSON were as follows:

- if the parameter is not a string:

  - if it is exactly 32 bits long and there are no z or x bits, emit it
    as an int
  - otherwise, emit it as a string made of 0/1/x/z characters

- if the parameter is a string:

  - if it contains only 0/1/x/z characters, append a space at the end
    to distinguish it from a non-string
  - otherwise, emit it directly

However, this caused a problem in the json11 parser used in nextpnr:
yosys emits unsigned ints, and nextpnr parses them as signed, using
the value of INT_MIN for values that overflow the signed int range.
This caused destruction of LUT5 initialization values.  Since both
nextpnr and yosys parser can also accept 32-bit parameters in the
same encoding as other widths, let's just remove that special case.
The old behavior is still left behind a `-compat-int` flag, in case
someone relies on it.
 2020-02-01 16:16:26 +01:00
Clifford Wolf 15fae357f6 Implement improved JSON attr/param encoding 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-01 12:34:52 +02:00
Miodrag Milanovic fde90f7f8e Fix json formatting 2019-06-21 20:01:40 +02:00
Miodrag Milanovic 50e7221077 Add upto and offset to JSON ports 2019-06-21 19:47:25 +02:00
Clifford Wolf f15def325c Added JSON upto and offset 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-06-21 15:22:17 +02:00
Ben Widawsky 4a18e19fb8 Support filename rewrite in backends 
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
 2019-06-18 14:39:52 -07:00
Clifford Wolf 67b1026297
Merge pull request #591 from hzeller/virtual-override 
Consistent use of 'override' for virtual methods in derived classes.
 2018-08-15 14:05:38 +02:00
Clifford Wolf 1dd156f516 Fix use of signed integers in JSON back-end 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-08-14 23:31:25 +02:00
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 9557fd2a36 Add attributes and parameter support to JSON front-end 2017-07-10 13:17:38 +02:00
Clifford Wolf 2198948398 Improved write_json help message 2016-12-29 12:13:29 +01:00
whitequark 546233f0e1 write_json: also write module attributes. 2016-07-12 06:32:04 +00:00
Clifford Wolf 0bc95f1e04 Added "yosys -D" feature 2016-04-21 23:28:37 +02:00
Sebastian Kuzminsky 7e6426a67d user-facing spelling fixes 
"speciefied" -> "specified"
"unkown" -> "unknown"
 2016-02-28 15:14:01 -07:00
Larry Doolittle 6c00704a5e Another block of spelling fixes 
Smaller this time
 2015-08-14 23:27:05 +02:00
Clifford Wolf 6c84341f22 Fixed trailing whitespaces 2015-07-02 11:14:30 +02:00
Clifford Wolf 3a6abc9bf6 Improvements in cellaigs.cc and "json -aig" 2015-06-11 10:48:16 +02:00
Clifford Wolf 1ae360cf72 AigMaker refactoring 2015-06-10 23:00:12 +02:00
Clifford Wolf e534881794 Added "json -aig" 2015-06-10 08:13:56 +02:00
Clifford Wolf c0e2b3eb11 Added "port_directions" to write_json output 2015-04-06 01:49:58 +02:00
Clifford Wolf 6c8fdb1829 Documentation for JSON format, added attributes 2015-03-06 10:21:21 +01:00
Clifford Wolf adc12ce46e Json bugfix 2015-03-03 09:41:41 +01:00
Clifford Wolf 4fc63f27a1 Json backend improvements 2015-03-03 09:28:44 +01:00
Clifford Wolf 8b488983d0 Added JSON backend 2015-03-02 23:30:58 +01:00