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Generate only one/zero cell in Blif parser. 

* Change: In CRL::BlifParser, formerly, a zero/one cell was added for
    each vss/vdd direct connection, generating a huge flock of cells.
    Now only generate one per netlist.
      It can be discussed whether to old behavior is more desirable,
    it is a compromise between wire and area.
This commit is contained in:
Jean-Paul Chaput 2020-06-06 12:13:29 +02:00
parent ac04466090
commit 7b1dab7742
1 changed files with 14 additions and 8 deletions
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14
crlcore/src/ccore/blif/BlifParser.cpp
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@ -284,6 +284,8 @@ namespace {
Subckts _subckts; Subckts _subckts;
size_t _depth; size_t _depth;
size_t _supplyCount; size_t _supplyCount;
Instance* _oneInstance;
Instance* _zeroInstance;
}; };
@ -446,6 +448,8 @@ namespace {
, _subckts () , _subckts ()
, _depth (0) , _depth (0)
, _supplyCount (0) , _supplyCount (0)
, _oneInstance (NULL)
, _zeroInstance(NULL)
{ {
if (not _staticInit) staticInit(); if (not _staticInit) staticInit();
@ -485,12 +489,13 @@ namespace {
Net* Model::newOne () Net* Model::newOne ()
{ {
if (not _masterNetOne) return NULL; if (not _masterNetOne) return NULL;
if (_oneInstance) return _oneInstance->getPlug( _masterNetOne )->getNet();
ostringstream name; name << "one_" << _supplyCount++; ostringstream name; name << "one_" << _supplyCount++;
Instance* oneInstance = Instance::create( _cell, name.str(), _oneCell ); _oneInstance = Instance::create( _cell, name.str(), _oneCell );
Net* one = Net::create( _cell, name.str() ); Net* one = Net::create( _cell, name.str() );
oneInstance->getPlug( _masterNetOne )->setNet( one ); _oneInstance->getPlug( _masterNetOne )->setNet( one );
return one; return one;
} }
@ -499,12 +504,13 @@ namespace {
Net* Model::newZero () Net* Model::newZero ()
{ {
if (not _masterNetZero) return NULL; if (not _masterNetZero) return NULL;
if (_zeroInstance) return _zeroInstance->getPlug( _masterNetZero )->getNet();
ostringstream name; name << "zero_" << _supplyCount++; ostringstream name; name << "zero_" << _supplyCount++;
Instance* zeroInstance = Instance::create( _cell, name.str(), _zeroCell ); _zeroInstance = Instance::create( _cell, name.str(), _zeroCell );
Net* zero = Net::create( _cell, name.str() ); Net* zero = Net::create( _cell, name.str() );
zeroInstance->getPlug( _masterNetZero )->setNet( zero ); _zeroInstance->getPlug( _masterNetZero )->setNet( zero );
return zero; return zero;
} }