diff options
Diffstat (limited to 'passes/memory/memory_map.cc')
-rw-r--r-- | passes/memory/memory_map.cc | 88 |
1 files changed, 53 insertions, 35 deletions
diff --git a/passes/memory/memory_map.cc b/passes/memory/memory_map.cc index e0e3802d1..10ab6e2f4 100644 --- a/passes/memory/memory_map.cc +++ b/passes/memory/memory_map.cc @@ -69,8 +69,8 @@ static void handle_cell(RTLIL::Module *module, RTLIL::Cell *cell) RTLIL::SigSpec refclock; RTLIL::State refclock_pol = RTLIL::State::Sx; for (int i = 0; i < clocks.width; i++) { - RTLIL::SigSpec wr_en = cell->connections["\\WR_EN"].extract(i, 1); - if (wr_en.is_fully_const() && wr_en.as_int() == 0) { + RTLIL::SigSpec wr_en = cell->connections["\\WR_EN"].extract(i * mem_width, mem_width); + if (wr_en.is_fully_const() && !wr_en.as_bool()) { static_ports.insert(i); continue; } @@ -256,7 +256,7 @@ static void handle_cell(RTLIL::Module *module, RTLIL::Cell *cell) { RTLIL::SigSpec wr_addr = cell->connections["\\WR_ADDR"].extract(j*mem_abits, mem_abits); RTLIL::SigSpec wr_data = cell->connections["\\WR_DATA"].extract(j*mem_width, mem_width); - RTLIL::SigSpec wr_en = cell->connections["\\WR_EN"].extract(j, 1); + RTLIL::SigSpec wr_en = cell->connections["\\WR_EN"].extract(j*mem_width, mem_width); RTLIL::Cell *c = new RTLIL::Cell; c->name = genid(cell->name, "$wreq", i, "", j); @@ -271,46 +271,64 @@ static void handle_cell(RTLIL::Module *module, RTLIL::Cell *cell) module->cells[c->name] = c; count_wrmux++; - RTLIL::Wire *w = new RTLIL::Wire; - w->name = genid(cell->name, "$wreq", i, "", j, "$y"); - module->wires[w->name] = w; - c->connections["\\Y"] = RTLIL::SigSpec(w); + RTLIL::Wire *w_seladdr = new RTLIL::Wire; + w_seladdr->name = genid(cell->name, "$wreq", i, "", j, "$y"); + module->wires[w_seladdr->name] = w_seladdr; + c->connections["\\Y"] = w_seladdr; - if (wr_en != RTLIL::SigSpec(1, 1)) + int wr_offset = 0; + while (wr_offset < wr_en.width) { + int wr_width = 1; + RTLIL::SigSpec wr_bit = wr_en.extract(wr_offset, 1); + + while (wr_offset + wr_width < wr_en.width) { + RTLIL::SigSpec next_wr_bit = wr_en.extract(wr_offset + wr_width, 1); + if (next_wr_bit != wr_bit) + break; + wr_width++; + } + + RTLIL::Wire *w = w_seladdr; + + if (wr_bit != RTLIL::SigSpec(1, 1)) + { + c = new RTLIL::Cell; + c->name = genid(cell->name, "$wren", i, "", j, "", wr_offset); + c->type = "$and"; + c->parameters["\\A_SIGNED"] = RTLIL::Const(0); + c->parameters["\\B_SIGNED"] = RTLIL::Const(0); + c->parameters["\\A_WIDTH"] = RTLIL::Const(1); + c->parameters["\\B_WIDTH"] = RTLIL::Const(1); + c->parameters["\\Y_WIDTH"] = RTLIL::Const(1); + c->connections["\\A"] = w; + c->connections["\\B"] = wr_bit; + module->cells[c->name] = c; + + w = new RTLIL::Wire; + w->name = genid(cell->name, "$wren", i, "", j, "", wr_offset, "$y"); + module->wires[w->name] = w; + c->connections["\\Y"] = RTLIL::SigSpec(w); + } + c = new RTLIL::Cell; - c->name = genid(cell->name, "$wren", i, "", j); - c->type = "$and"; - c->parameters["\\A_SIGNED"] = RTLIL::Const(0); - c->parameters["\\B_SIGNED"] = RTLIL::Const(0); - c->parameters["\\A_WIDTH"] = RTLIL::Const(1); - c->parameters["\\B_WIDTH"] = RTLIL::Const(1); - c->parameters["\\Y_WIDTH"] = RTLIL::Const(1); - c->connections["\\A"] = RTLIL::SigSpec(w); - c->connections["\\B"] = wr_en; + c->name = genid(cell->name, "$wrmux", i, "", j, "", wr_offset); + c->type = "$mux"; + c->parameters["\\WIDTH"] = wr_width; + c->connections["\\A"] = sig.extract(wr_offset, wr_width); + c->connections["\\B"] = wr_data.extract(wr_offset, wr_width); + c->connections["\\S"] = RTLIL::SigSpec(w); module->cells[c->name] = c; w = new RTLIL::Wire; - w->name = genid(cell->name, "$wren", i, "", j, "$y"); + w->name = genid(cell->name, "$wrmux", i, "", j, "", wr_offset, "$y"); + w->width = wr_width; module->wires[w->name] = w; - c->connections["\\Y"] = RTLIL::SigSpec(w); - } + c->connections["\\Y"] = w; - c = new RTLIL::Cell; - c->name = genid(cell->name, "$wrmux", i, "", j); - c->type = "$mux"; - c->parameters["\\WIDTH"] = cell->parameters["\\WIDTH"]; - c->connections["\\A"] = sig; - c->connections["\\B"] = wr_data; - c->connections["\\S"] = RTLIL::SigSpec(w); - module->cells[c->name] = c; - - w = new RTLIL::Wire; - w->name = genid(cell->name, "$wrmux", i, "", j, "$y"); - w->width = mem_width; - module->wires[w->name] = w; - c->connections["\\Y"] = RTLIL::SigSpec(w); - sig = RTLIL::SigSpec(w); + sig.replace(wr_offset, w); + wr_offset += wr_width; + } } module->connections.push_back(RTLIL::SigSig(data_reg_in[i], sig)); |