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Gowin. DSP. Allow combinatorial modes. 

Do not assume that RESET, CE, and CLK pins are always present.

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
This commit is contained in:
YRabbit 2026-02-06 13:05:11 +10:00
parent 826a534195
commit 91e8d744f6
1 changed files with 7 additions and 5 deletions
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12
himbaechel/uarch/gowin/gowin.cc
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@ -984,11 +984,13 @@ bool GowinImpl::dsp_valid(Loc l, IdString bel_type, bool explain_invalid) const
}
// check for control nets "overflow"
BelId dsp_bel = ctx->getBelByLocation(Loc(l.x, l.y, BelZ::DSP_Z));
if (dsp_info.at(dsp_bel).reset.size() > 4) {
if (explain_invalid) {
log_nonfatal_error("More than 4 different networks for RESET signals in one DSP are not allowed.\n");
if (dsp_info.count(dsp_bel)) {
if (dsp_info.at(dsp_bel).reset.size() > 4) {
if (explain_invalid) {
log_nonfatal_error("More than 4 different networks for RESET signals in one DSP are not allowed.\n");
}
return false;
}
return false;
}
if (dsp_info.count(dsp_macro_bel)) {
if (dsp_info.at(dsp_macro_bel).ce.size() > 4 || dsp_info.at(dsp_macro_bel).clk.size() > 4) {
@ -1240,7 +1242,7 @@ void GowinImpl::notifyBelChange(BelId bel, CellInfo *cell)
dsp_info[dsp].reset[dsp_cell_data.dsp_reset->name]++;
}
if (dsp_cell_data.dsp_ce != nullptr) {
dsp_info[dsp_macro].ce[dsp_cell_data.dsp_ce->name]++;
dsp_info.at(dsp_macro).ce[dsp_cell_data.dsp_ce->name]++;
}
if (dsp_cell_data.dsp_clk != nullptr) {
dsp_info.at(dsp_macro).clk[dsp_cell_data.dsp_clk->name]++;