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gowin: Add the IO[TRBL]style placement recognition

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Specifying pin placement with this notation (e.g. IOR4B) allows
to use the same constraint file without changes for different
packages and even different families.
The vendor router also understands this notation.

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
This commit is contained in:
YRabbit 2021-08-23 16:19:02 +10:00
parent 897a2fccb6
commit e4196f32d3
1 changed files with 37 additions and 5 deletions
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42
gowin/arch.cc
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@ -482,14 +482,34 @@ DelayQuad Arch::getWireTypeDelay(IdString wire)
} }
} }
static Loc getLoc(std::smatch match, int maxX, int maxY)
{
int col = std::stoi(match[2]);
int row = 1; // Top
std::string side = match[1].str();
if (side == "R") {
row = col;
col = maxX;
} else if (side == "B") {
row = maxY;
} else if (side == "L") {
row = col;
col = 1;
}
int z = match[3].str()[0] - 'A';
return Loc(col - 1, row - 1, z);
}
void Arch::read_cst(std::istream &in) void Arch::read_cst(std::istream &in)
{ {
std::regex iobre = std::regex("IO_LOC +\"([^\"]+)\" +([^ ;]+) *;.*"); std::regex iobre = std::regex("IO_LOC +\"([^\"]+)\" +([^ ;]+) *;.*");
std::regex portre = std::regex("IO_PORT +\"([^\"]+)\" +([^;]+;).*"); std::regex portre = std::regex("IO_PORT +\"([^\"]+)\" +([^;]+;).*");
std::regex port_attrre = std::regex("([^ =;]+=[^ =;]+) *([^;]*;)"); std::regex port_attrre = std::regex("([^ =;]+=[^ =;]+) *([^;]*;)");
std::smatch match, match_attr; std::regex iobelre = std::regex("IO([TRBL])([0-9]+)([A-Z])");
std::string line; std::smatch match, match_attr, match_pinloc;
std::string line, pinline;
bool io_loc; bool io_loc;
while (!in.eof()) { while (!in.eof()) {
std::getline(in, line); std::getline(in, line);
io_loc = true; io_loc = true;
@ -512,11 +532,23 @@ void Arch::read_cst(std::istream &in)
} }
if (io_loc) { // IO_LOC name pin if (io_loc) { // IO_LOC name pin
IdString pinname = id(match[2]); IdString pinname = id(match[2]);
pinline = match[2];
const PairPOD *belname = pairLookup(package->pins.get(), package->num_pins, pinname.index); const PairPOD *belname = pairLookup(package->pins.get(), package->num_pins, pinname.index);
if (belname == nullptr) if (belname != nullptr) {
std::string bel = IdString(belname->src_id).str(this);
it->second->attrs[IdString(ID_BEL)] = bel;
} else if (std::regex_match(pinline, match_pinloc, iobelre)) {
// may be it's IOx#[AB] style?
Loc loc = getLoc(match_pinloc, getGridDimX(), getGridDimY());
BelId bel = getBelByLocation(loc);
if (bel == BelId()) {
log_error("Pin %s not found\n", pinline.c_str());
}
std::string belname = getCtx()->nameOfBel(bel);
it->second->attrs[IdString(ID_BEL)] = belname;
} else {
log_error("Pin %s not found\n", pinname.c_str(this)); log_error("Pin %s not found\n", pinname.c_str(this));
std::string bel = IdString(belname->src_id).str(this); }
it->second->attrs[IdString(ID_BEL)] = bel;
} else { // IO_PORT attr=value } else { // IO_PORT attr=value
std::string attr_val = match[2]; std::string attr_val = match[2];
while (std::regex_match(attr_val, match_attr, port_attrre)) { while (std::regex_match(attr_val, match_attr, port_attrre)) {