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Gowin. BUGFIX. Fix FFs compatibility.

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Flipflops with a fixed ClockEnable input cannot coexist with flipflops
with a variable one.

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
This commit is contained in:
YRabbit 2024-12-09 20:04:39 +10:00
parent e08b587b88
commit 70a2d95b48
1 changed files with 3 additions and 1 deletions
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4
himbaechel/uarch/gowin/gowin.cc
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@ -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