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ice40: Lock out mutually exclusive pips

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-06-10 12:17:55 +02:00
parent 827a43c88c
commit 6da8f98eac
2 changed files with 13 additions and 2 deletions
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1
ice40/chip.cc
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@ -97,6 +97,7 @@ Chip::Chip(ChipArgs args) : args(args)
bel_to_cell.resize(chip_info.num_bels);
wire_to_net.resize(chip_info.num_wires);
pip_to_net.resize(chip_info.num_pips);
pips_locked.resize(chip_info.num_pips);
}
// -----------------------------------------------------------------------

14
ice40/chip.h
View File

@ -404,7 +404,7 @@ struct Chip
vector<IdString> bel_to_cell;
vector<IdString> wire_to_net;
vector<IdString> pip_to_net;
vector<bool> pips_locked;
Chip(ChipArgs args);
ChipArgs args;
@ -561,6 +561,11 @@ struct Chip
assert(pip != PipId());
assert(pip_to_net[pip.index] == IdString());
pip_to_net[pip.index] = net;
// Optimise?
for (int i = 0; i < chip_info.num_pips; i++) {
if (chip_info.pip_data[i].switch_index == chip_info.pip_data[pip.index].switch_index)
pips_locked[i] = true;
}
}
void unbindPip(PipId pip)
@ -568,12 +573,17 @@ struct Chip
assert(pip != PipId());
assert(pip_to_net[pip.index] != IdString());
pip_to_net[pip.index] = IdString();
// Optimise?
for (int i = 0; i < chip_info.num_pips; i++) {
if (chip_info.pip_data[i].switch_index == chip_info.pip_data[pip.index].switch_index)
pips_locked[i] = false;
}
}
bool checkPipAvail(PipId pip) const
{
assert(pip != PipId());
return pip_to_net[pip.index] == IdString();
return !pips_locked[pip.index];
}
IdString getPipNet(PipId pip) const