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ecp5: Refactor skeleton of packer

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-07-17 13:19:27 +02:00
parent 0e31a8e266
commit ac4cdd6604
2 changed files with 55 additions and 41 deletions
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2
ecp5/cells.h
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@ -38,6 +38,8 @@ inline bool is_carry(const BaseCtx *ctx, const CellInfo *cell) { return cell->ty
inline bool is_lc(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("TRELLIS_LC"); }
inline bool is_trellis_io(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("TRELLIS_IO"); }
inline bool is_dpram(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("TRELLIS_DPR16X4"); }
inline bool is_pfumx(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("PFUMX"); }

94
ecp5/pack.cc
View File

@ -20,6 +20,7 @@
#include <algorithm>
#include <iterator>
#include <unordered_set>
#include "cells.h"
#include "design_utils.h"
#include "log.h"
#include "util.h"
@ -32,55 +33,66 @@ static bool is_nextpnr_iob(Context *ctx, CellInfo *cell)
cell->type == ctx->id("$nextpnr_iobuf");
}
static bool is_trellis_io(const Context *ctx, const CellInfo *cell) { return cell->type == ctx->id("TRELLIS_IO"); }
// Simple "packer" to remove nextpnr IOBUFs, this assumes IOBUFs are manually instantiated
void pack_io(Context *ctx)
class Ecp5Packer
{
std::unordered_set<IdString> packed_cells;
std::vector<std::unique_ptr<CellInfo>> new_cells;
log_info("Packing IOs..\n");
public:
Ecp5Packer(Context *ctx) : ctx(ctx){};
for (auto cell : sorted(ctx->cells)) {
CellInfo *ci = cell.second;
if (is_nextpnr_iob(ctx, ci)) {
CellInfo *trio = nullptr;
if (ci->type == ctx->id("$nextpnr_ibuf") || ci->type == ctx->id("$nextpnr_iobuf")) {
trio = net_only_drives(ctx, ci->ports.at(ctx->id("O")).net, is_trellis_io, ctx->id("B"), true, ci);
private:
// Simple "packer" to remove nextpnr IOBUFs, this assumes IOBUFs are manually instantiated
void pack_io(Context *ctx)
{
std::unordered_set<IdString> packed_cells;
std::vector<std::unique_ptr<CellInfo>> new_cells;
log_info("Packing IOs..\n");
} else if (ci->type == ctx->id("$nextpnr_obuf")) {
trio = net_only_drives(ctx, ci->ports.at(ctx->id("I")).net, is_trellis_io, ctx->id("B"), true, ci);
}
if (trio != nullptr) {
// Trivial case, TRELLIS_IO used. Just destroy the net and the
// iobuf
log_info("%s feeds TRELLIS_IO %s, removing %s %s.\n", ci->name.c_str(ctx), trio->name.c_str(ctx),
ci->type.c_str(ctx), ci->name.c_str(ctx));
NetInfo *net = trio->ports.at(ctx->id("B")).net;
if (net != nullptr) {
ctx->nets.erase(net->name);
trio->ports.at(ctx->id("B")).net = nullptr;
for (auto cell : sorted(ctx->cells)) {
CellInfo *ci = cell.second;
if (is_nextpnr_iob(ctx, ci)) {
CellInfo *trio = nullptr;
if (ci->type == ctx->id("$nextpnr_ibuf") || ci->type == ctx->id("$nextpnr_iobuf")) {
trio = net_only_drives(ctx, ci->ports.at(ctx->id("O")).net, is_trellis_io, ctx->id("B"), true, ci);
} else if (ci->type == ctx->id("$nextpnr_obuf")) {
trio = net_only_drives(ctx, ci->ports.at(ctx->id("I")).net, is_trellis_io, ctx->id("B"), true, ci);
}
if (ci->type == ctx->id("$nextpnr_iobuf")) {
NetInfo *net2 = ci->ports.at(ctx->id("I")).net;
if (net2 != nullptr) {
ctx->nets.erase(net2->name);
if (trio != nullptr) {
// Trivial case, TRELLIS_IO used. Just destroy the net and the
// iobuf
log_info("%s feeds TRELLIS_IO %s, removing %s %s.\n", ci->name.c_str(ctx), trio->name.c_str(ctx),
ci->type.c_str(ctx), ci->name.c_str(ctx));
NetInfo *net = trio->ports.at(ctx->id("B")).net;
if (net != nullptr) {
ctx->nets.erase(net->name);
trio->ports.at(ctx->id("B")).net = nullptr;
}
if (ci->type == ctx->id("$nextpnr_iobuf")) {
NetInfo *net2 = ci->ports.at(ctx->id("I")).net;
if (net2 != nullptr) {
ctx->nets.erase(net2->name);
}
}
} else {
log_error("TRELLIS_IO required on all top level IOs...\n");
}
} else {
log_error("TRELLIS_IO required on all top level IOs...\n");
packed_cells.insert(ci->name);
std::copy(ci->attrs.begin(), ci->attrs.end(), std::inserter(trio->attrs, trio->attrs.begin()));
}
packed_cells.insert(ci->name);
std::copy(ci->attrs.begin(), ci->attrs.end(), std::inserter(trio->attrs, trio->attrs.begin()));
}
for (auto pcell : packed_cells) {
ctx->cells.erase(pcell);
}
for (auto &ncell : new_cells) {
ctx->cells[ncell->name] = std::move(ncell);
}
}
for (auto pcell : packed_cells) {
ctx->cells.erase(pcell);
}
for (auto &ncell : new_cells) {
ctx->cells[ncell->name] = std::move(ncell);
}
}
public:
void pack() { pack_io(ctx); }
private:
Context *ctx;
};
// Main pack function
bool Arch::pack()
@ -88,7 +100,7 @@ bool Arch::pack()
Context *ctx = getCtx();
try {
log_break();
pack_io(ctx);
Ecp5Packer(ctx).pack();
log_info("Checksum: 0x%08x\n", ctx->checksum());
return true;
} catch (log_execution_error_exception) {