* New: In Anabatic::LayerAssign, a new mode "LayerAssignNoGlobalM2V" has
been added to manage the 3 routing metal technologies like AMS 350nm.
The standard cells have all their connectors punctual and aligned on
an horizontal line in the middle of the Cell. This is a design
inherited from the channel routing times that makes global routing
in metal2 *through* a standard cell almost impossible (except for
directly neighboring cells). Thus, the layer assignment must move
up all the metal2 that span more than two GCells.
* Change: In Katana::Manipulator::ripupPerpandiculars(), when a perpandicular
has a fixed axis and it's (sole) underlying track is taken, ripup
the other segment to ensure the perpandicular interval will be free.
We need to do that, because in DataNegociate::update(), if the
perpandicular is taken, the perpandicular interval will always been
empty preventing the segment to have a valid track span (so directly
failing).
* Change: In Katana::SegmentFsm::conflictSolveByPlaceds() the fixed axis
segments must also been taken into account as conflicts.
Also correct a small bug, the first conflicting segment in the
interval was not taken into account correctly.
* New: In Hurricane::Entity, add an id counter limit and a memory size
limit. The two limits are checked only when a new Entity object is
created. This should help avoiding massive memory links.
* New: In CRL Core, add a "crlcore.groundName" and a "crlcore.powerName"
parameter to specify the name of the ground/power signals to be
created if they are missing in a Cell. For Alliance libraries it
would be "vss" & "vdd" (default values), but for real technologies,
it is often "gnd!" & "vdd!".
The Blif parser is modificated to make use of it.
* Bug: In AnabaticEngine::unify(), set the resulting unified segment in
the center of the GCells common side. Gcells under a segment are
found by using the edge that cover the segment axis. When we have
a "bend" GCell stack and the axis is wrong, they could be ommited.
This was causing deleted segments to be not removed from some
Edges, then core dump.
* Change: In Anabatic::AutoSegment::create(), smarter choosing of the
reference contact, select the fixed or terminal one instead of
always the source one.
* New: In Anabatic::Edge::isEnding(), new function to check if a
segment going through an Edge is starting/ending in either source
or target GCell of the edge (active only when running in channel
mode).
* New: In Anabatic::Edge::add(), a segment takes part in the occupancy
only if it is not ending in either source or target (channel mode
only). The occupancy due to terminal is pre-computed in Katana.
* New: In Anabatic::Edge::ripup(), in channel mode, never ripup a
segment which is ending in either source or target (we *have* to
access this edge to connect to the terminal).
* Bug: In Anabatic::GCell::hcut() and vcut(), force the update of
the Edge which is on the side that will get splitted by the cut.
It's capacity will be reduced to it must be updated.
* Change: In Anabatic::GCell::updateGContacts() add a flag to conditionnally
update horizontals or verticals only. We may require only a partial
update when resizing the GCell in only one direction.
This, again, related to the fact that we compute the GCells under
a segment thanks to it's axis position, so we need to be very careful
when modificating axis.
* Change: In Katana::Block::resizeChannels(), only update GContact vertical
position. Do not disturb X positions of segments.
* Bug: In Katana::GlobalRoute::DigitalDistance, in channel mode, some
Edges can have a zero capacity, but still be reachable if the net has
a terminal in either source or target. Look for this case and return
a distance of zero instead of "unreachable". This was causing the
global routing not to complete in channel mode.
For computing the edge distance, makes the vertical edges much more
long (10 times) than the horizontal ones as the vertical capacity is
very limited. Hard coded for now, should make it a parameter in the
future.
* Change: In KatanaEngine::annotateGlobalGraph(), decrease the capacity
of edges with reserveCapacity for each terminal inside a GCell.
Both north and south edges are decreased as we a terminal will
block both north and south edges.
As a counterpart, the Edge capacity is not decreased when the
global router connect to a terminal.
* Change: In Katana::RoutingEvent::revalidate(), when in repair stage,
do not expand the slack for horizontal segments in channel mode.
So they may not overlap the standard cell row.
* Bug: In Stratus documentation, do not use the french option in babel,
the documentation is in english!
* New: In Documentation, added Hurricane/Python tutorial, part for drawing
layout.
* Bug: In Anabatic::AutoSegment::computeOptimal(), the "side stack"
computing the intersection of all the sides of the GCell that the
segment is going through was implicitly supposing that the
resulting intersection wasn't empty. But for analog segment, we
compute the position of all the segments linked though simple
doglegs, and as dogleg occurs there can be a sufficient shift
so the intersections of all the sides became empty.
Now the "side stack" can manage configuration when instead
of having an intersection we have a "hole" in the GCell side
span (only one hole is supported at the moment). When a hole
is present, the optimal position is the center of the hole.
Should be refined so that the position is computed according
to the longest GCell that we go through.
* Change: In Katana::SegmentFsm::_slackenGlobal(), when slackening
a global from a ananlog net, allow to make a dog leg once
instead of immediately moving up. The break point is the center
of the segment.
* Change: In Katana::Manipulator::Makedogleg(DbU::Unit) if the break
position is over a device, choose the left of right GCell.
* New: In Commons, inspector support for std::pair<T,U>.
* New: In Hurricane::Layer, ContactLayer & ViaLayer, support for non
square VIAs. The hole (cut) remains square, but the various metal
extensions can now be different in X and Y. The ::getEnclosure()
method now takes a flag EnclosureH / EnclosureV.
* New: In Hurricane::DbU, inspector support for:
std::pair<DbU::Unit,DbU::Unit>
std::array<DbU::Unit,3>
Must be defined here as DbU do not exists yet in Commons.h
* Bug: In Hurricane::Interval::getSize(), when the interval is "full span",
do not return the difference between min and max, but directly DbU::Max.
(the previous result was -1 !)
* New: In CRL Core Python/Technology.py, support for non square VIAs in
the configuration files. Applied to FreePDK 45.
* New: In CRL::RoutingGauge, added a "symbolic" flag to tell if a gauge
is for symbolic layout or not. Exported to Python.
* New: In Anabatic::AutoHorizontal::updatePosition(), differentiated
computation for soure or target taking account of the VIA extension
in the right segment metal (due to non-square VIAs).
* Change: In Anabatic::AutoHorizontal::_makeDogleg(), the dogleg is
UP for HV gauges and DOWN for VH.
* New: In Anabatic::AutoSegment::_initialize(), create a cache of the
various extension length for each layer (viaToTop, viaToBottom,
viaToSame).
New implementation of getExtensionCap() using the previous cached
extension table. See updatePositions().
New static functions to access the extension cache in the header:
getViaTotopCap() ...
* Change: In Anabatic::AutoSegment, in various update methods, updateOrient()
must always be called *before* updatePositions() as extensions are
dependant on source/target.
* New: In Anabatic::AutoSegment::getEndAxes() compute the position of the
first source and last target position (center/axes) on an *aligned*
set of segments.
* New: In Anabatic::AutoSegment, add a new state flag SegAxisFixed to
signal segments that can be put on only one track. Specific case
to VH gauge for a M1 vertical terminal with a M2 vertical segment.
The M2 is effectively bound to the M1 axis position.
* Bug: In Anabatic::NetBuilderVH::_do_xG_xM1_xM3(), in case of E/W global
and only one RoutingPad the connexion to the RoutingPad was duplicated.
It was valid, but totally stupid.
* Bug: In Anabatic::Session::_canonize(), for an aligned segment set,
intersect the user constraints from all segments instead of only
considering the canonical one.
Issue a warning about too tight constraints only for symbolic
gauges. It may be correct for the real ones.
* New: In Katata::DataNegociate::update(), more accurate computation
of the perpandicular free interval. Use segment extension cap
calculation. Create a special case for fixed axis segments allowing
them to find alternative free interval, try under source and under
target as they are likely to be draggable segments.
* Change: In Katana::Manipulator::relax(), use the extension cap value
to compute the axis of the perpandicular segemnts.
* Change: In Katana::Manipulator::moveUp(), now move up the whole set
of aligned segments instead of just the canonical one.
* Change: In Katana::NegociateWindow::loadRoutingPads(), more accurate
TrackMarkers insertions for fixed terminals.
* New: In Katana::RoutingEvent::Key::Compare::operator(), segments with
fixed axis are processed prior to any others.
* New: In Katana::RoutingEventLoop, store segment pointers instead of
ids to generate more accurate error messages.
* Change: In Katana::RoutingPlane::create(), perform local track
assignment only for HV gauges.
* Change: In Katana::SegmentFsm::_slackenLocal(), add a "dragMinimize"
step in the automaton. Mutliple states transitions can occurs in
a row if an action fails.
* New: In Katana::Session::_toIntervalAxis(), normalize interval
bounds so they are on track positions (by shrinking the interval).
* Bug: In Katana::TrackMarker CTOR, the weigh computation was wrong.
* New: In Anabatic & Katana, add the new "drag" feature.
With VH gauges used by real technologies (M1-H, M2-V, M3-H) a new
routing configuration that was not efficiently handled did appear.
While the preferred routing direction for metal1 is officially
horizontal, due to the way the standard cell must be designed,
their metal1 terminals are still verticals (or punctuals).
Thus, when connecting to them, we face the case where the metal1
terminal (RoutingPad) is vertical *and* the metal2 wire is also
vertical. With that setup, the position of the AutoContactTerminal
via12 cannot be deduced, it may range all the way over the
metal1 RoutingPad. What may define it's position is the metal3 the
metal2 finally connects to. That, is, when we have one horizontal
(the metal3) and one vertical (the metal1 RoutingPad).
The intermediate wire of metal2 can be kept to a minimum size
by "dragging" the via12 close to the via23 when the metal3 wire is
moved.
* New: In Anabatic & Katana, problem of closely vertically aligneds
RoutingPads in metal1 is managed first in PreProcess by restricting
the span of the connecteds metal3 and in _makeDogleg also by restricting
the span even more tightly (to the RoutingPad itself).
* New: In Anabatic::AutoContactTerminal, add the "drag" support.
Automatically check if the connecting segment is in the same
direction as the RoutingPad, if so, sets the "SegDrag" flag.
The dragging state can be known with the "::canDrag()" predicate.
* New: In Anabatic::AutoHorizontal, add the "drag" support.
The drag state can be known with the "::isDrag()" predicate.
In "::_makeDogleg()", when making a dogleg on a dragable segment
pass the drag state correctly and restrict the perpandicular span
of the perpandicular to the RoutingPad (though segment user constraints).
If we make a dogleg on the metal2 is it likely than we cannot go
straigth out vertically from the RoutingPad, so the new perpandicular
*is* restricted to the RoutingPad span.
Idem for AutoVertical.
* New: In Katana::Manipulator, add method "::dragMinimize()" which find a
hole where to minimize a draggable segment. We finally did not use it,
but keep it for potential further use.
* New: In Katana::PreProcess, adds a "protectAlignedaccesses()" local
function to check for vertically aligned metal1 RoutingPads, in that
case setup user constraints on the metal3 segments so they cannot
completly cover the other RoutingPad with metal2.
We also keep a "metal2protect()" function that create a fixed segment
to lock/protect a RoutingPad. Not used for now.
* New: In Katana::Session, add a RoutingPad locking event mechanism.
This allows us to request the creation of a locking (fixed segment)
over a draggable segment. Not used for now.
Lock events are processeds before all others as they create new
TrackElements.
* New: In Katana::Track, "::getNextFree()" and "::getPreviousFree()"
method to find the nearest free interval in a Track after/before a
position.
* Bug: In Anabatic::AutoHorizontal::getConstraints(), merge with user
constraints *only* if it's not an empty interval (as we use min/max
functions). Idem for AutoVertical.
* Bug: In AutoSegments_OnContacts::Locator::isValid(), the boolean test
must be inverted. Seems it never worked, but we never used it until
now...
* New: In Anabatic::AutoContact and the derived classes, manages wide
wires. The contact self dimension itself according to the segments
it is connected to. Special case for the AutoContactTerminal which
also read the size of the component it is anchored upon.
New refresh method "updateSize()" and flag CntInvalidatedWidth.
to compute the size.
In AutoContactTerminal, compute the constraint box according to
the width of the segment.
* New: In Anabatic::AutoSegment, flags are now implemented as "static const"
attributes of the class. The flags are stored into a uint64_t as
they are more than 32.
Added new flag "SegWide" and associated predicates.
* Change: In GCellTopology::_doHChannel() and GCellTopology::_doVChannel(),
uses the simpler overload of AutoSegment::create() in order to detect
the wire width automatically.
* New: In Katana::Manipulator, split insertToTrack() and forceToTrack()
into a one-track method and a segment level method that iterate over
the track span of the segment.
* New: In Katana::SegmentFsm, for each cost in the table, now allow access
to a specific track. So the base functions have now two parameters:
"icost" and "itrack" (has a cost can have multiple tracks in the case
of wide segments).
* Change: In Katana::TrackElement, remove the index of the element inside
it's track, as for a wide segment it will not be meaningful for the
non-base track. This means that we have to use the Track::find()
method each time instead.
Remove the wide flag, as it is a duplicate of the one in AutoSegment.
Added a getTrackCount() method to tell the number of track the
segment is inserted into. Needed in the Track destroy step to delete
a segment only when the last track that refers it is destroyed.
Added getSymmetricAxis() to correct the computation of the symmetric
base track in case of wide segment as the base track is not centered
but the the leftmost one.
* Change: In Track::insert() insert wide segments in their whole track span.
* Change: In TrackCost, create an array of costs according to the segment
track span.
* Change: In TrackSegment::create(), now activate the factory and create
wide segments.
* Bug: In Katana::AutoSegments_Perpandicular, correct the debug indentation
problem (ever shifting to the right).
* New: In Katana::TrackCost, the TrackElement and it's optional
symmetric are now kept as attribute of a TrackCost. The cost
is completly computed inside the constructor.
TrackCost now support any mix of symmetric event and wide
segments.
The cost is now computed by adding directly to the current
one instead of creating secondaries that are merged afterwards.
As a consequence, remove all copy construction and merge
capabilities.
All the various methods used to compute the cost are renamed
"addOverlapcost()" in all the various related objects.
As a reminder, the overal cost method call is as follow:
1. TrackCost constructor on a TrackElement.
2. Call TrackElement::addOverlapcost()
3. For all Track under the TrackElement, call
Track::addOverlapCost()
4. For all other TrackElement intersecting with
the overlap interval call:
TrackElement::incOverlapCost()
5. The callback overlap function for segments
is called (defined in NegociateWidow).
Don't confuse:
- TrackElement::addOverlapCost(), which compute the cost of
inserting the segment inside a track (or a set of).
- TrackElement::incOverlapCost(), which compute the cost of
overlaping with this already inserted segment. It is the
other way around of the previous one.
* Change: In Katana::SegmentFsm, use a vector of pointer to TrackCost
instead of an object to avoid copy construction.
* Bug: In Anabatic::Dijsktra, correct the indentation in cdebug calls
(lots of them causing a big shift right).
* New: In Anabatic::TrackSegment, new helper structure SideStack to
manage a set of aligned GCells and their various sides sizes.
* Change: In Anabatic::TrackSegment::computeOptimal(), more accurate
computation of attractors from global segments and variable size
GCells using SideStack.
* Change: In Katana::DataSymmetric::checkPairing(), increase the tolerance
for misaligned symmetrics from 2 to 5 tracks (should be enough for our
narrow channel routing).
* New: In Katana::TrackSegment, add a first flag to enable locking of
priority. If it is set, calls to either "computePriority()" or
"forcePriority()" will have no effect. Added the uint32_t flags
paraphernalia.
* New: In ::computeNetPriority(), overall function to control the call
of TrackSegment::computeAlignedPriority(). The call is done from
NegociateWindow::run().
* New: Katana::TrackSegment::computeAlignedPriority(), order the
TrackSegments aligneds through doglegs to the one with the highest
priority is routed first and others progressively from him. Done by
forcing an ever decreasing priority on the aligneds ones.
The amount of decrease is small so the aligned segments got routed
(ordered) in close, if not contiguous, sequence. Priority is locked
for the order to remain.
* Bug: In Katana::TrackSegment::computePriority(), correct computation
of the priority when there is more than 10 free tracks
(a DbU::toLambda() call was missing, leading to very big priorities).
* Change: In katana::TrackCost CTOR, do not compute a distance to fixed
in the case of analog segments, this is backfiring.
Slight change of the compare function when delta differs. Seems
to improve a little.
* Bug: In Hurricane::Interval, the ::getSize() method was returning a negative
length when the Interval was empty. Now return zero. This was causing
slight cost functions side effect when computing the overlap of a segment
with another one belonging to the same net (i.e. shareDelta)
* Bug: In Katana::AutoSegment::computeOptimal(), checks that the optimal
position for the axis is indeed inside the GCell interval.
* Bug: In Katana::DataSymmetric::getSymmetrical(Interval&), reverse the shrink
applied to GCells sides. Interval are of the type [min:max[ so after
symmetric transformation they become ]smax:smin]. Apply a correction so
that they are [smax:smin[ and could be merged with the paired interval
(the one without symmetry applied).
* Bug: In katana::TrackCost::consolidate(), the overlap (now) always positive,
and must be *substracted* to the "delta" (not *added*).
* Bug: In Katana::_computeNetOptimals(), now skip the already processeds
AutoSegments instead of re-processing them.
* New: In Katana::AutoSegment::computeOptimal(), improved computation of
the axis hint:
- For analog net, propagate through the simple doglegs to find
attractors.
- Restrict the allowed interval to the union of GCell sides and
segments constraints that are terminals.
- Consider a local as "long" if it's length exceed 20 the P-pitch.
(maybe make that a tool parameter).
* Change: In Anabatic::AutoSegments collections, change the type of all
the flags that where in "unsigned int" (32 bits) to Flags (uint64_t)
as there is now more than 32 flags for functions.
* New: In Ababatic::Constants, added new flag Flags::WithPerpands, which
makes the number of flags tip over 32 bits, thus making mandatory
to uses Flags and not unsigned int.
* New: In Anabatic::AutoSegments_Perpandiculars, manage a new flag
Flags::WithDoglegs to allow to propagate through global segments that
are connecteds via doglegs on local segments. Meaning that there is
a good chance that they could be aligned.
Slighly change the way we propagate on aligned segments: no longer
check for VTee or HTee, but only for same direction and layer as
master.
* New: In Anabatic & Katana, replace all the "int", "long" and their
variants by the less implementation ambiguous "int32_t", "int64_t"
(and variant). This should help to better detect bit trucation in
flags.
Use the type to give a hint about the flags kind:
- Type "Flags", for flags shared among Anabatic & Katana
functions/methods (may also appear in some objects states).
- Type "uint32_t" for flags belonging to an object internal
state of from Hurricane functions flags (those should be
grouped in a Flag subclass in a perfect world).
* New: In Katana::Configuration, added "katana.profileEventCosts" to
triggers the event's profiling.
* New: In Katana::NegociateWindow::_negociate(), save a profiling
trace of all the events and their priority, separated by metal,
for later analysis (see doChip.py in alliance-check-toolkit).
* New: In Katana::RoutingEvent::Key::Compare(), start implementing
new segment freedom degree functions.
* Change: In Hurricane::Net::_getString(), put a more complete
information about the Net instead of just only it's name.
* Bug: In Katana, reorder the various stages so that they are
executed in the exact same sequence as in "doChip.py" so now
routing in graphic mode and text mode gives exactly the same
results.
* Bug: In Katana::PyKatanaEngine, runGlobalRouter do not take any
argument.
* New: In Katana::SegmentFsm, the object is now able to handle two events
at the same time. The master and it's symmetric. When there is no
symmetric, the corresponing data is just left blank. This makes a
bigger object, but as there is only one when running, it is not an
issue.
Candidates tracks are now an vector of array<2> (pairs), the
TrackCost::Compare() functor has to be wrapped through CompareCostArray.
The compined TrackCost of the two tracks is accumulated into the first
element.
Everything related to events gets duplicated: _event is now _event1
and _event2, and so on.
As there can be now two Manipulator actions done with SegmentFsm,
this class now completly hide the Manipulator level from the
RoutingEvent processing.
New function ::bindToTrack() to perform the track insertion.
* New: In Katana::TrackCost, add a new ::merge() function.
* New: In Katana::TrackElement and Katana::TrackSegment, add symmetric
management. Allows to know if a TrackElement has a symmetric and to
access it.
* New: In Katana::DataSymmetric, add new overload for ::getSymmetrical()
to handle DbU::Unit and intervals.
* Change: In Katana::RoutingEvent, remove all direct uses of Manipulator
objects. Now any change to the event associated segment must go through
call to Segment Fsm.
* Change: In Katana, adjust the debug level so internal informations are
put below level 156.
* New: In Hurricane::DbU, in ::getValueString(), special display when the
value is Min or Max (more helpful than a gigantic number).
* Change: In Anabatic::Autocontact, replace getMinDepth() and
getMaxDepth() by getDepthSpan().
* New: In Anabatic::AutoSegment::canMoveUp(), add an optional check of
low up density (Flags::CheckLowUpDensity). Allows to move up a
segment if the up density is (very) low, and in this case it's more
efficient than breaking it to fit in the lower layer.
canMoveUp() is now able to perform the same work as canPivotUp()
if *not* supplied the flag Flags::IgnoreContacts.
* New: In Katana, in GlobalRouting::DigitalDistance() now take into
account the cost of a VIA (currently set to 2.5). Need to known the
Net currently routed in the DigitalDistance object itself.
* Change: In Katana::Track::Element::canPivotUp(), now also takes a flag
parameter.
* Change: In Katana::Manipulator, new flag IgnoreContacts to mirror the
one of Anabatic.
* Change: In Katana::SegmentFsm, allocate once a Manipulator object instead
of many times on the fly.
In SegmentFsm::_slackenGlobal(), in the slacken state, if the up
density is (very) low, bypass to move up instead of slackening.
This solve better the routing of the control part of the register file.
The register file having a pathological case of terminal placement:
many punctual terminals aligneds in METAL2 *and* a grid of METAL2 and
METAL3 blockages near below...
* Bug: In Katana::Session::_revalidate(), after removing the zero-length
segments, forgot to re-order the track, leading to many stranges effects
as the indexes where no longer coherent in the Track.
* Bug: In Hurricane, in StaticObservable::getObserver(), if the slot
pointer is NULL, do not try to access the owner. Returns NULL, so
the caller can be aware of the situation...
* Change: In Hurricane, in BreakpointWidget & ExceptionWidget some
cosmetic changes (fonts and window sizes).
* Bug: In Anabatic, In AutoHorizontal::getConstraints(), take into account
the constraints from the source AutoContact, as it holds the constraints
transmitted by the RoutingPads and sets up by propageConstraintsFromRp().
It is likely to be a bug affecting the original Katabatic as well.
* Change: In Anabatic, in RawGCellsUnder(), check that the segment is not
completly oustside the cell abutment box and truncate the coordinates
to the part that is inside. Use the "shrink" if we reach the east/north
border.
* Change: In Anabatic, in Configuration, no more decorator because we will
use a true derived relationship. Katana *derives* from *Anabatic* and do
not *decorate* it, so the Configuration can do the same. It also implies
that we directly create a Katana engine, not an Anabatic one.
* Change: In Anabatic, in Session, do not allow the opening of the Session
in a standalone fashion (with a static method). Instead it must be opened
using the relevant method of the Anabatic/Katana engine. This ensure we
are opening the right Session type.
* Change: In Anabatic, in AutoSegment_Aligneds() collection the seed segment
is not part of the collection by default, but will be included if the
Flags::WithSelf is set.
* Change: In Configuration, all the flags value are now defined in two steps.
Declared in the header and initialized in the module. This is to prevent
the fact that on some cases, in relation with the Python "extern C" part
modules, we need a true allocated variable. It was causing weird linking
problems.
A side effect is that they can no longer be used as entry is switches,
have to replace them by if/else.
* New: In Anabatic, new GCell::getNeighborAt() utility function.
* Bug: In Anabatic, in GCell::doGrid(), tag all the GCells of the grid with
the grid type... Back annote all the edges capacity (north & east) with
the reserved local capacity.
* New: Complete portage of Kite over Anabatic. The new engine is christened
"Katana" for Kite-Analogic. When it's capabilities and performances
will be on a part with Kite, it is to completly replace it (and take
back the "Kite" name). Preliminary tests seems to show that, contrary
to intuition (because built on a more complex/slower grid), it is even
slightly faster than Kite 8-).
Jean-Paul Chaput