caiyu/nextpnr
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mistral: Workaround for weird SCLR issue

Browse Source 
Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat 2021-05-15 11:53:04 +01:00
parent 9221acc9e2
commit 34677d3883
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
mistral/lab.cc
View File

@ -322,6 +322,13 @@ void Arch::assign_ff_info(CellInfo *cell) const
cell->ffInfo.ctrlset.aclr = get_ctrlsig(getCtx(), cell, id_ACLR); cell->ffInfo.ctrlset.aclr = get_ctrlsig(getCtx(), cell, id_ACLR);
cell->ffInfo.ctrlset.sclr = get_ctrlsig(getCtx(), cell, id_SCLR); cell->ffInfo.ctrlset.sclr = get_ctrlsig(getCtx(), cell, id_SCLR);
cell->ffInfo.ctrlset.sload = get_ctrlsig(getCtx(), cell, id_SLOAD); cell->ffInfo.ctrlset.sload = get_ctrlsig(getCtx(), cell, id_SLOAD);
// If SCLR is used, but SLOAD isn't, then it seems like we need to pretend as if SLOAD is connected GND (so set
// [BT]SLOAD_EN inside the ALMs, and clear SLOAD_INV)
if (cell->ffInfo.ctrlset.sclr.net != nullptr && cell->ffInfo.ctrlset.sload.net == nullptr) {
cell->ffInfo.ctrlset.sload.net = nets.at(id("$PACKER_GND_NET")).get();
cell->ffInfo.ctrlset.sload.inverted = false;
}
cell->ffInfo.sdata = get_net_or_empty(cell, id_SDATA); cell->ffInfo.sdata = get_net_or_empty(cell, id_SDATA);
cell->ffInfo.datain = get_net_or_empty(cell, id_DATAIN); cell->ffInfo.datain = get_net_or_empty(cell, id_DATAIN);
} }