luke
/
abc
mirror of https://github.com/YosysHQ/abc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Improvements to the retiming algorithm.

This commit is contained in:
Alan Mishchenko 2019-04-18 19:01:24 -07:00
parent 6fdfefaa55
commit cd0102f61e
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/base/wln/wlnRetime.c
View File

@ -554,7 +554,7 @@ Vec_Int_t * Wln_NtkRetime( Wln_Ntk_t * pNtk, int fVerbose )
Vec_Int_t * vFront = &p->vFront;
Vec_Int_t * vMoves = Vec_IntAlloc(0);
int nMoves = 0, fPrevFwd = 0, fPrevBwd = 0, nCountIncrease = 0;
int DelayInit = 0, DelayBest = 0;
int DelayInit = 0, DelayBest = 0, nChange = 0;
Wln_RetPrint( p, fVerbose );
Wln_RetMarkChanges( p, NULL );
p->DelayMax = DelayInit = DelayBest = Wln_RetPropDelay( p );
@ -613,9 +613,15 @@ Vec_Int_t * Wln_NtkRetime( Wln_Ntk_t * pNtk, int fVerbose )
if ( p->DelayMax >= DelayMaxPrev )
nCountIncrease++;
else
{
if ( nCountIncrease > 0 )
nChange++;
nCountIncrease = 0;
}
if ( nCountIncrease > 3 )
break;
if ( nChange > 5 )
break;
Wln_RetFindSources( p );
if ( 2*Vec_IntSize(&p->vEdgeLinks) > Vec_IntCap(&p->vEdgeLinks) )
Vec_IntGrow( &p->vEdgeLinks, 4*Vec_IntSize(&p->vEdgeLinks) );