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

ice40 estimateDelay to account for out/in muxes

Browse Source
This commit is contained in:
Eddie Hung 2018-07-27 19:52:45 -07:00
parent 4c40541484
commit 02b3bda7f6
1 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
ice40/arch.cc
View File

@ -584,6 +584,22 @@ delay_t Arch::estimateDelay(WireId src, WireId dst) const
// offset = 500;
// }
// Estimate for output mux
for (const auto& bp : getWireBelPins(src)) {
if (bp.pin == PIN_O && getBelType(bp.bel) == TYPE_ICESTORM_LC) {
offset += 330;
break;
}
}
// Estimate for input mux
for (const auto& bp : getWireBelPins(dst)) {
if ((bp.pin == PIN_I0 || bp.pin == PIN_I1 || bp.pin == PIN_I2 || bp.pin == PIN_I3) && getBelType(bp.bel) == TYPE_ICESTORM_LC) {
offset += 260;
break;
}
}
return xscale * abs(xd) + yscale * abs(yd) + offset;
}