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detect cascaded GCKs

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This commit is contained in:
Miodrag Milanovic 2024-07-02 12:00:35 +02:00
parent a9c47a3e60
commit f7c446e930
1 changed files with 9 additions and 0 deletions
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9
himbaechel/uarch/ng-ultra/pack.cc
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@ -51,6 +51,9 @@ inline bool is_dfr(const BaseCtx *ctx, const CellInfo *cell) { return cell->type
// Return true if a cell is a WFG/WFB
inline bool is_wfg(const BaseCtx *ctx, const CellInfo *cell) { return cell->type.in(id_WFB, id_WFG); }
// Return true if a cell is a GCK
inline bool is_gck(const BaseCtx *ctx, const CellInfo *cell) { return cell->type.in(id_GCK, id_NX_GCK_U); }
// Process the contents of packed_cells
void NgUltraPacker::flush_cells()
{
@ -1607,6 +1610,12 @@ void NgUltraPacker::pack_gcks(void)
} else if (mode == "MUX") {
// all used
} else log_error("Unknown mode '%s' for cell '%s'.\n", mode.c_str(), ci.name.c_str(ctx));
if (net_driven_by(ctx, ci.getPort(id_SI1), is_gck, id_SO) ||
net_driven_by(ctx, ci.getPort(id_SI2), is_gck, id_SO) ||
net_driven_by(ctx, ci.getPort(id_CMD), is_gck, id_SO)) {
log_error("Cascaded GCKs are not allowed.\n");
}
}
}