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quicklogic: ql_dsp_macc set fractured mode

This commit is contained in:
Emil J. Tywoniak 2025-03-06 18:00:23 +01:00
parent b420951e6c
commit 1def0bc951
1 changed files with 10 additions and 0 deletions
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10
techlibs/quicklogic/ql_dsp_macc.cc
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@ -60,6 +60,10 @@ static void create_ql_macc_dsp(ql_dsp_macc_pm &pm, int dsp_version)
if (dsp_version == 2)
cell_base_name = "dspv2";
std::function<void(Cell*)> set_fractured = nullptr;
auto set_fractured_dspv1 = [](Cell* cell) -> void {cell->setPort(ID(f_mode_i), State::S0);};
auto set_fractured_dspv2 = [](Cell* cell) -> void {cell->setParam(ID(FRAC_MODE), State::S0);};
if (min_width <= 2 && max_width <= 2 && z_width <= 4) {
log_debug("\trejected: too narrow (%zd %zd %zd)\n", min_width, max_width, z_width);
return;
@ -77,6 +81,7 @@ static void create_ql_macc_dsp(ql_dsp_macc_pm &pm, int dsp_version)
tgt_a_width = 20;
tgt_b_width = 18;
tgt_z_width = 38;
set_fractured = set_fractured_dspv1;
} else {
reject = true;
}
@ -91,6 +96,7 @@ static void create_ql_macc_dsp(ql_dsp_macc_pm &pm, int dsp_version)
tgt_a_width = 20;
tgt_b_width = 18;
tgt_z_width = 50;
set_fractured = set_fractured_dspv2;
} else {
reject = true;
}
@ -202,6 +208,10 @@ static void create_ql_macc_dsp(ql_dsp_macc_pm &pm, int dsp_version)
bool subtract = (st.add->type == ID($sub));
cell->setPort(ID(subtract_i), RTLIL::SigSpec(subtract ? RTLIL::S1 : RTLIL::S0));
// Disable fractured mode
if (set_fractured)
set_fractured(cell);
// Mark the cells for removal
pm.autoremove(st.mul);
pm.autoremove(st.add);