Gowin. BUGFIX. Fix FFs compatibility.

Flipflops with a fixed ClockEnable input cannot coexist with flipflops with a variable one. Signed-off-by: YRabbit <[email protected]>
yrabbit · Dec 9, 2024 · 70a2d95 · 70a2d95
1 parent e08b587
commit 70a2d95
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/himbaechel/uarch/gowin/gowin.cc b/himbaechel/uarch/gowin/gowin.cc
@@ -822,7 +822,9 @@ inline bool incompatible_ffs(const CellInfo *ff, const CellInfo *adj_ff)
             (ff->type == id_DFFNRE && adj_ff->type != id_DFFNSE) ||
             (ff->type == id_DFFNP && adj_ff->type != id_DFFNC) || (ff->type == id_DFFNC && adj_ff->type != id_DFFNP) ||
             (ff->type == id_DFFNPE && adj_ff->type != id_DFFNCE) ||
-            (ff->type == id_DFFNCE && adj_ff->type != id_DFFNPE));
+            (ff->type == id_DFFNCE && adj_ff->type != id_DFFNPE) || (ff->type == id_DFF && adj_ff->type != id_DFF) ||
+            (ff->type == id_DFFE && adj_ff->type != id_DFFE) || (ff->type == id_DFFN && adj_ff->type != id_DFFN) ||
+            (ff->type == id_DFFNE && adj_ff->type != id_DFFNE));
 }
 
 // placement validation