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nexus: Add support for clocked MULT9X9s

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2020-11-16 09:07:25 +00:00
parent 9203181625
commit 30c65931b2
4 changed files with 57 additions and 0 deletions
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9
common/design_utils.cc
View File

@ -174,4 +174,13 @@ void replace_bus(Context *ctx, CellInfo *old_cell, IdString old_name, int old_of
}
}
void copy_port(Context *ctx, CellInfo *old_cell, IdString old_name, CellInfo *new_cell, IdString new_name)
{
if (!old_cell->ports.count(old_name))
return;
new_cell->ports[new_name].name = new_name;
new_cell->ports[new_name].type = old_cell->ports.at(old_name).type;
connect_port(ctx, old_cell->ports.at(old_name).net, new_cell, new_name);
}
NEXTPNR_NAMESPACE_END

3
common/design_utils.h
View File

@ -110,6 +110,9 @@ void print_utilisation(const Context *ctx);
void replace_bus(Context *ctx, CellInfo *old_cell, IdString old_name, int old_offset, bool old_brackets,
CellInfo *new_cell, IdString new_name, int new_offset, bool new_brackets, int width);
// Copy a port from one cell to another
void copy_port(Context *ctx, CellInfo *old_cell, IdString old_name, CellInfo *new_cell, IdString new_name);
NEXTPNR_NAMESPACE_END
#endif

9
nexus/constids.inc
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@ -292,6 +292,7 @@ X(PREADDCAS_EN)
X(SR_18BITSHIFT_EN)
X(OPC)
X(RESET)
X(RESETMODE)
X(ASIGNED_OPERAND_EN)
X(BYPASS_MULT9)
@ -303,3 +304,11 @@ X(SHIFTA)
X(REGBYPS)
X(PP)
X(SIGNEDA)
X(SIGNEDB)
X(RSTOUT)
X(CEOUT)
X(REGINPUTA)
X(REGINPUTB)
X(REGOUTPUT)

36
nexus/pack.cc
View File

@ -1443,6 +1443,23 @@ struct NexusPacker
return cell;
}
void copy_global_dsp_params(CellInfo *orig, CellInfo *root)
{
if (root->params.count(id_GSR) && orig->params.count(id_GSR))
root->params[id_GSR] = orig->params.at(id_GSR);
if (root->params.count(id_RESET) && orig->params.count(id_RESETMODE))
root->params[id_RESET] = orig->params.at(id_RESETMODE);
for (auto child : root->constr_children)
copy_global_dsp_params(orig, child);
}
void copy_param(CellInfo *orig, IdString orig_name, CellInfo *dst, IdString dst_name)
{
if (!orig->params.count(orig_name))
return;
dst->params[dst_name] = orig->params[orig_name];
}
void pack_dsps()
{
log_info("Packing DSPs...\n");
@ -1458,6 +1475,25 @@ struct NexusPacker
replace_bus(ctx, ci, id_B, 0, true, preadd9_0, id_B, 0, false, 9);
replace_bus(ctx, ci, id_A, 0, true, mult9_0, id_A, 0, false, 9);
replace_bus(ctx, ci, id_Z, 0, true, reg18_0, id_PP, 0, false, 18);
replace_port(ci, id_SIGNEDA, mult9_0, id_ASIGNED);
replace_port(ci, id_SIGNEDB, preadd9_0, id_BSIGNED);
copy_port(ctx, ci, id_CLK, preadd9_0, id_CLK);
copy_port(ctx, ci, id_CLK, mult9_0, id_CLK);
copy_port(ctx, ci, id_CLK, reg18_0, id_CLK);
replace_port(ci, id_CEA, mult9_0, id_CEA);
replace_port(ci, id_RSTA, mult9_0, id_RSTA);
replace_port(ci, id_CEB, preadd9_0, id_CEB);
replace_port(ci, id_RSTB, preadd9_0, id_RSTB);
replace_port(ci, id_CEOUT, reg18_0, id_CEP);
replace_port(ci, id_RSTOUT, reg18_0, id_RSTP);
copy_param(ci, id_REGINPUTA, mult9_0, id_REGBYPSA1);
copy_param(ci, id_REGINPUTB, preadd9_0, id_REGBYPSBR0);
copy_param(ci, id_REGOUTPUT, reg18_0, id_REGBYPS);
copy_global_dsp_params(ci, preadd9_0);
auto_cascade_group(preadd9_0);
to_remove.push_back(ci);
}