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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2020 David Shah <dave@ds0.me>
*
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "log.h"
#include "nextpnr.h"
#include "util.h"
NEXTPNR_NAMESPACE_BEGIN
namespace {
struct NexusFasmWriter
{
const Context *ctx;
std::ostream &out;
std::vector<std::string> fasm_ctx;
void push(const std::string &x) { fasm_ctx.push_back(x); }
void pop() { fasm_ctx.pop_back(); }
void pop(int N)
{
for (int i = 0; i < N; i++)
fasm_ctx.pop_back();
}
bool last_was_blank = true;
void blank()
{
if (!last_was_blank)
out << std::endl;
last_was_blank = true;
}
void write_prefix()
{
for (auto &x : fasm_ctx)
out << x << ".";
last_was_blank = false;
}
void write_bit(const std::string &name, bool value = true)
{
if (value) {
write_prefix();
out << name << std::endl;
}
}
void write_comment(const std::string &cmt) { out << "# " << cmt << std::endl; }
void write_vector(const std::string &name, const std::vector<bool> &value, bool invert = false)
{
write_prefix();
out << name << " = " << int(value.size()) << "'b";
for (auto bit : boost::adaptors::reverse(value))
out << ((bit ^ invert) ? '1' : '0');
out << std::endl;
}
void write_int_vector(const std::string &name, uint64_t value, int width, bool invert = false)
{
std::vector<bool> bits(width, false);
for (int i = 0; i < width; i++)
bits[i] = (value & (1ULL << i)) != 0;
write_vector(name, bits, invert);
}
NexusFasmWriter(const Context *ctx, std::ostream &out) : ctx(ctx), out(out) {}
std::string tile_name(int loc, const PhysicalTileInfoPOD &tile)
{
int r = loc / ctx->chip_info->width;
int c = loc % ctx->chip_info->width;
return stringf("%sR%dC%d__%s", ctx->nameOf(tile.prefix), r, c, ctx->nameOf(tile.tiletype));
}
const PhysicalTileInfoPOD &tile_by_type_and_loc(int loc, IdString type)
{
auto &ploc = ctx->chip_info->grid[loc];
for (int i = 0; i < ploc.num_phys_tiles; i++) {
if (ploc.phys_tiles[i].tiletype == type.index)
return ploc.phys_tiles[i];
}
log_error("No tile of type %s found at location R%dC%d", ctx->nameOf(type), loc / ctx->chip_info->width,
loc % ctx->chip_info->width);
}
std::string escape_name(const std::string &name)
{
std::string escaped;
for (char c : name) {
if (c == ':')
escaped += "__";
else
escaped += c;
}
return escaped;
}
void write_pip(PipId pip)
{
auto &pd = ctx->pip_data(pip);
if (pd.flags & PIP_FIXED_CONN)
return;
std::string tile = tile_name(pip.tile, tile_by_type_and_loc(pip.tile, pd.tile_type));
std::string source_wire = escape_name(ctx->pip_src_wire_name(pip).str(ctx));
std::string dest_wire = escape_name(ctx->pip_src_wire_name(pip).str(ctx));
write_bit(stringf("%s.PIP.%s.%s", tile.c_str(), dest_wire.c_str(), source_wire.c_str()));
}
void write_net(const NetInfo *net)
{
write_comment(stringf("Net %s", ctx->nameOf(net)));
std::set<PipId> sorted_pips;
for (auto &w : net->wires)
sorted_pips.insert(w.second.pip);
for (auto p : sorted_pips)
write_pip(p);
blank();
}
void operator()()
{
// Write routing
for (auto n : sorted(ctx->nets)) {
write_net(n.second);
}
}
};
} // namespace
void Arch::write_fasm(std::ostream &out) const { NexusFasmWriter(getCtx(), out)(); }
NEXTPNR_NAMESPACE_END
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