mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-08-14 14:55:26 +00:00
Code Activity

coolrunner2: Add extraction for TFFs

Browse source
This commit is contained in:
Robert Ou 2018-03-31 02:54:26 -07:00
parent dd5fab69c1
commit 8fe9cdf364
3 changed files with 54 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

12
techlibs/coolrunner2/synth_coolrunner2.cc
View file

@ -149,6 +149,16 @@ struct SynthCoolrunner2Pass : public ScriptPass
run("dfflibmap -prepare -liberty +/coolrunner2/xc2_dff.lib");
}
if (check_label("map_tff"))
{
// This is quite hacky. By telling abc that it can only use AND and XOR gates, abc will try and use XOR
// gates "whenever possible." This will hopefully cause toggle flip-flop structures to turn into an XOR
// connected to a D flip-flop. We then match on these and convert them into XC2 TFF cells.
run("abc -g AND,XOR");
run("clean");
run("extract -map +/coolrunner2/tff_extract.v");
}
if (check_label("map_pla"))
{
run("abc -sop -I 40 -P 56");
@ -160,6 +170,8 @@ struct SynthCoolrunner2Pass : public ScriptPass
run("dfflibmap -liberty +/coolrunner2/xc2_dff.lib");
run("dffinit -ff FDCP Q INIT");
run("dffinit -ff FDCP_N Q INIT");
run("dffinit -ff FTCP Q INIT");
run("dffinit -ff FTCP_N Q INIT");
run("dffinit -ff LDCP Q INIT");
run("dffinit -ff LDCP_N Q INIT");
run("coolrunner2_sop");