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Changes to "memory" pass for new $memwr/$mem WR_EN interface

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This commit is contained in:
Clifford Wolf 2014-07-16 12:13:13 +02:00
parent dcdd5c11b4
commit 765f172211
3 changed files with 56 additions and 38 deletions
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88
passes/memory/memory_map.cc
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@ -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, "$y");
w->width = wr_width;
module->wires[w->name] = w;
c->connections["\\Y"] = RTLIL::SigSpec(w);
c->connections["\\Y"] = w;
sig.replace(wr_offset, w);
wr_offset += wr_width;
}
c = new RTLIL::Cell;
c->name = genid(cell->name, "$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);
}
module->connections.push_back(RTLIL::SigSig(data_reg_in[i], sig));