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nextpnr
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Remove unused advanced timing constraint API 

This API was simply an attractive nuisance as no code was ever developed
to actually process timing constraints (other than clock constraints
which use a different API).

While I do want to consider basic false path support, among other
things, in the near future; I plan for this to use a new API that
doesn't add complexity to the BaseCtx/Context monstrosity and that is
easier to use on the timing analysis side.

Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat 2021-02-26 10:07:00 +00:00
parent 89928a0e6b
commit b64f45a8ba
2 changed files with 0 additions and 187 deletions
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101
common/nextpnr.cc
View File

@ -104,13 +104,6 @@ std::string IdStringList::str(const Context *ctx) const
return s;
}
TimingConstrObjectId BaseCtx::timingWildcardObject()
{
TimingConstrObjectId id;
id.index = 0;
return id;
}
std::string &StrRingBuffer::next()
{
std::string &s = buffer.at(index++);
@ -119,76 +112,6 @@ std::string &StrRingBuffer::next()
return s;
}
TimingConstrObjectId BaseCtx::timingClockDomainObject(NetInfo *clockDomain)
{
NPNR_ASSERT(clockDomain->clkconstr != nullptr);
if (clockDomain->clkconstr->domain_tmg_id != TimingConstrObjectId()) {
return clockDomain->clkconstr->domain_tmg_id;
} else {
TimingConstraintObject obj;
TimingConstrObjectId id;
id.index = int(constraintObjects.size());
obj.id = id;
obj.type = TimingConstraintObject::CLOCK_DOMAIN;
obj.entity = clockDomain->name;
clockDomain->clkconstr->domain_tmg_id = id;
constraintObjects.push_back(obj);
return id;
}
}
TimingConstrObjectId BaseCtx::timingNetObject(NetInfo *net)
{
if (net->tmg_id != TimingConstrObjectId()) {
return net->tmg_id;
} else {
TimingConstraintObject obj;
TimingConstrObjectId id;
id.index = int(constraintObjects.size());
obj.id = id;
obj.type = TimingConstraintObject::NET;
obj.entity = net->name;
constraintObjects.push_back(obj);
net->tmg_id = id;
return id;
}
}
TimingConstrObjectId BaseCtx::timingCellObject(CellInfo *cell)
{
if (cell->tmg_id != TimingConstrObjectId()) {
return cell->tmg_id;
} else {
TimingConstraintObject obj;
TimingConstrObjectId id;
id.index = int(constraintObjects.size());
obj.id = id;
obj.type = TimingConstraintObject::CELL;
obj.entity = cell->name;
constraintObjects.push_back(obj);
cell->tmg_id = id;
return id;
}
}
TimingConstrObjectId BaseCtx::timingPortObject(CellInfo *cell, IdString port)
{
if (cell->ports.at(port).tmg_id != TimingConstrObjectId()) {
return cell->ports.at(port).tmg_id;
} else {
TimingConstraintObject obj;
TimingConstrObjectId id;
id.index = int(constraintObjects.size());
obj.id = id;
obj.type = TimingConstraintObject::CELL_PORT;
obj.entity = cell->name;
obj.port = port;
constraintObjects.push_back(obj);
cell->ports.at(port).tmg_id = id;
return id;
}
}
Property::Property() : is_string(false), str(""), intval(0) {}
Property::Property(int64_t intval, int width) : is_string(false), intval(intval)
@ -286,30 +209,6 @@ Property Property::from_string(const std::string &s)
return p;
}
void BaseCtx::addConstraint(std::unique_ptr<TimingConstraint> constr)
{
for (auto fromObj : constr->from)
constrsFrom.emplace(fromObj, constr.get());
for (auto toObj : constr->to)
constrsTo.emplace(toObj, constr.get());
IdString name = constr->name;
constraints[name] = std::move(constr);
}
void BaseCtx::removeConstraint(IdString constrName)
{
TimingConstraint *constr = constraints[constrName].get();
for (auto fromObj : constr->from) {
auto fromConstrs = constrsFrom.equal_range(fromObj);
constrsFrom.erase(std::find(fromConstrs.first, fromConstrs.second, std::make_pair(fromObj, constr)));
}
for (auto toObj : constr->to) {
auto toConstrs = constrsFrom.equal_range(toObj);
constrsFrom.erase(std::find(toConstrs.first, toConstrs.second, std::make_pair(toObj, constr)));
}
constraints.erase(constrName);
}
const char *BaseCtx::nameOfBel(BelId bel) const
{
const Context *ctx = getCtx();

86
common/nextpnr.h
View File

@ -372,14 +372,6 @@ struct ArcBounds
};
};
struct TimingConstrObjectId
{
int32_t index = -1;
bool operator==(const TimingConstrObjectId &other) const { return index == other.index; }
bool operator!=(const TimingConstrObjectId &other) const { return index != other.index; }
};
NEXTPNR_NAMESPACE_END
namespace std {
@ -394,15 +386,6 @@ template <> struct hash<NEXTPNR_NAMESPACE_PREFIX Loc>
return seed;
}
};
template <> struct hash<NEXTPNR_NAMESPACE_PREFIX TimingConstrObjectId>
{
std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX TimingConstrObjectId &obj) const noexcept
{
return hash<int>()(obj.index);
}
};
} // namespace std
#include "archdefs.h"
@ -612,8 +595,6 @@ struct NetInfo : ArchNetInfo
std::unique_ptr<ClockConstraint> clkconstr;
TimingConstrObjectId tmg_id;
Region *region = nullptr;
};
@ -629,7 +610,6 @@ struct PortInfo
IdString name;
NetInfo *net;
PortType type;
TimingConstrObjectId tmg_id;
};
struct CellInfo : ArchCellInfo
@ -654,7 +634,6 @@ struct CellInfo : ArchCellInfo
// parent.[xyz] := 0 when (constr_parent == nullptr)
Region *region = nullptr;
TimingConstrObjectId tmg_id;
void addInput(IdString name);
void addOutput(IdString name);
@ -706,41 +685,6 @@ struct ClockConstraint
DelayPair high;
DelayPair low;
DelayPair period;
TimingConstrObjectId domain_tmg_id;
};
struct TimingConstraintObject
{
TimingConstrObjectId id;
enum
{
ANYTHING,
CLOCK_DOMAIN,
NET,
CELL,
CELL_PORT
} type;
IdString entity; // Name of clock net; net or cell
IdString port; // Name of port on a cell
};
struct TimingConstraint
{
IdString name;
enum
{
FALSE_PATH,
MIN_DELAY,
MAX_DELAY,
MULTICYCLE,
} type;
delay_t value;
std::unordered_set<TimingConstrObjectId> from;
std::unordered_set<TimingConstrObjectId> to;
};
// Represents the contents of a non-leaf cell in a design
@ -768,12 +712,6 @@ struct HierarchicalCell
std::unordered_map<IdString, IdString> hier_cells;
};
inline bool operator==(const std::pair<const TimingConstrObjectId, TimingConstraint *> &a,
const std::pair<TimingConstrObjectId, TimingConstraint *> &b)
{
return a.first == b.first && a.second == b.second;
}
struct DeterministicRNG
{
uint64_t rngstate;
@ -899,11 +837,6 @@ struct BaseCtx
IdString::initialize_add(this, "", 0);
IdString::initialize_arch(this);
TimingConstraintObject wildcard;
wildcard.id.index = 0;
wildcard.type = TimingConstraintObject::ANYTHING;
constraintObjects.push_back(wildcard);
design_loaded = false;
}
@ -1014,30 +947,11 @@ struct BaseCtx
// --------------------------------------------------------------
// Timing Constraint API
// constraint name -> constraint
std::unordered_map<IdString, std::unique_ptr<TimingConstraint>> constraints;
// object ID -> object
std::vector<TimingConstraintObject> constraintObjects;
// object ID -> constraint
std::unordered_multimap<TimingConstrObjectId, TimingConstraint *> constrsFrom;
std::unordered_multimap<TimingConstrObjectId, TimingConstraint *> constrsTo;
TimingConstrObjectId timingWildcardObject();
TimingConstrObjectId timingClockDomainObject(NetInfo *clockDomain);
TimingConstrObjectId timingNetObject(NetInfo *net);
TimingConstrObjectId timingCellObject(CellInfo *cell);
TimingConstrObjectId timingPortObject(CellInfo *cell, IdString port);
NetInfo *getNetByAlias(IdString alias) const
{
return nets.count(alias) ? nets.at(alias).get() : nets.at(net_aliases.at(alias)).get();
}
void addConstraint(std::unique_ptr<TimingConstraint> constr);
void removeConstraint(IdString constrName);
// Intended to simplify Python API
void addClock(IdString net, float freq);
void createRectangularRegion(IdString name, int x0, int y0, int x1, int y1);