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ecp5: Working on packer

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-07-17 13:41:33 +02:00
parent ac4cdd6604
commit eb773f246d
1 changed files with 75 additions and 10 deletions
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83
ecp5/pack.cc
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@ -39,11 +39,22 @@ class Ecp5Packer
Ecp5Packer(Context *ctx) : ctx(ctx){};
private:
// Simple "packer" to remove nextpnr IOBUFs, this assumes IOBUFs are manually instantiated
void pack_io(Context *ctx)
// Process the contents of packed_cells and new_cells
void flush_cells()
{
for (auto pcell : packed_cells) {
ctx->cells.erase(pcell);
}
for (auto &ncell : new_cells) {
ctx->cells[ncell->name] = std::move(ncell);
}
packed_cells.clear();
new_cells.clear();
}
// Simple "packer" to remove nextpnr IOBUFs, this assumes IOBUFs are manually instantiated
void pack_io()
{
std::unordered_set<IdString> packed_cells;
std::vector<std::unique_ptr<CellInfo>> new_cells;
log_info("Packing IOs..\n");
for (auto cell : sorted(ctx->cells)) {
@ -79,19 +90,73 @@ class Ecp5Packer
std::copy(ci->attrs.begin(), ci->attrs.end(), std::inserter(trio->attrs, trio->attrs.begin()));
}
}
for (auto pcell : packed_cells) {
ctx->cells.erase(pcell);
flush_cells();
}
for (auto &ncell : new_cells) {
ctx->cells[ncell->name] = std::move(ncell);
// Pass to pack LUT5s into a newly created slice
void pack_lut5s()
{
log_info("Packing LUT5s...\n");
for (auto cell : sorted(ctx->cells)) {
CellInfo *ci = cell.second;
if (is_pfumx(ctx, ci)) {
std::unique_ptr<CellInfo> packed =
create_ecp5_cell(ctx, ctx->id("TRELLIS_SLICE"), ci->name.str(ctx) + "_SLICE");
NetInfo *f0 = ci->ports.at(ctx->id("BLUT")).net;
if (f0 == nullptr)
log_error("PFUMX '%s' has disconnected port 'BLUT'\n", ci->name.c_str(ctx));
NetInfo *f1 = ci->ports.at(ctx->id("ALUT")).net;
if (f1 == nullptr)
log_error("PFUMX '%s' has disconnected port 'ALUT'\n", ci->name.c_str(ctx));
CellInfo *lc0 = net_driven_by(ctx, f0, is_lut, ctx->id("Z"));
CellInfo *lc1 = net_driven_by(ctx, f1, is_lut, ctx->id("Z"));
if (lc0 == nullptr)
log_error("PFUMX '%s' has BLUT driven by cell other than a LUT\n", ci->name.c_str(ctx));
if (lc1 == nullptr)
log_error("PFUMX '%s' has ALUT driven by cell other than a LUT\n", ci->name.c_str(ctx));
replace_port(lc0, ctx->id("A"), packed.get(), ctx->id("A0"));
replace_port(lc0, ctx->id("B"), packed.get(), ctx->id("B0"));
replace_port(lc0, ctx->id("C"), packed.get(), ctx->id("C0"));
replace_port(lc0, ctx->id("D"), packed.get(), ctx->id("D0"));
replace_port(lc1, ctx->id("A"), packed.get(), ctx->id("A1"));
replace_port(lc1, ctx->id("B"), packed.get(), ctx->id("B1"));
replace_port(lc1, ctx->id("C"), packed.get(), ctx->id("C1"));
replace_port(lc1, ctx->id("D"), packed.get(), ctx->id("D1"));
replace_port(ci, ctx->id("C0"), packed.get(), ctx->id("M0"));
replace_port(ci, ctx->id("Z"), packed.get(), ctx->id("OFX0"));
ctx->nets.erase(f0->name);
ctx->nets.erase(f1->name);
new_cells.push_back(std::move(packed));
packed_cells.insert(lc0->name);
packed_cells.insert(lc1->name);
packed_cells.insert(ci->name);
}
}
flush_cells();
}
public:
void pack() { pack_io(ctx); }
void pack()
{
pack_io();
pack_lut5s();
}
private:
Context *ctx;
std::unordered_set<IdString> packed_cells;
std::vector<std::unique_ptr<CellInfo>> new_cells;
struct SliceUsage
{
bool lut0_used = false, lut1_used = false;
bool ccu2_used = false, dpram_used = false, ramw_used = false;
bool ff0_used = false, ff1_used = false;
bool mux5_used = false, muxx_used = false;
};
std::unordered_map<IdString, SliceUsage> sliceUsage;
};
// Main pack function