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mistral: Trim SDATA if SLOAD is low

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Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat 2021-05-14 21:13:43 +01:00
parent b29fa1d24c
commit dce847b2f3
1 changed files with 9 additions and 0 deletions
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9
mistral/pack.cc
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@ -167,6 +167,15 @@ struct MistralPacker
if (ci->type != id_MISTRAL_NOT && ci->type != id_GND && ci->type != id_VCC)
process_inv_constants(cell.second);
}
// Special case - SDATA can only be trimmed if SLOAD is low
for (auto cell : sorted(ctx->cells)) {
CellInfo *ci = cell.second;
if (ci->type != id_MISTRAL_FF)
continue;
if (ci->get_pin_state(id_SLOAD) != PIN_0)
continue;
disconnect_port(ctx, ci, id_SDATA);
}
// Remove superfluous inverters and constant drivers
trim_design();
}