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/**CFile****************************************************************
FileName [hopUtil.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [And-Inverter Graph package.]
Synopsis [Various procedures.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - May 11, 2006.]
Revision [$Id: hopUtil.c,v 1.00 2006/05/11 00:00:00 alanmi Exp $]
***********************************************************************/
#include "hop.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Increments the current traversal ID of the network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ManIncrementTravId( Hop_Man_t * p )
{
if ( p->nTravIds >= (1<<30)-1 )
Hop_ManCleanData( p );
p->nTravIds++;
}
/**Function*************************************************************
Synopsis [Cleans the data pointers for the nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ManCleanData( Hop_Man_t * p )
{
Hop_Obj_t * pObj;
int i;
p->nTravIds = 1;
Hop_ManConst1(p)->pData = NULL;
Hop_ManForEachPi( p, pObj, i )
pObj->pData = NULL;
Hop_ManForEachPo( p, pObj, i )
pObj->pData = NULL;
Hop_ManForEachNode( p, pObj, i )
pObj->pData = NULL;
}
/**Function*************************************************************
Synopsis [Recursively cleans the data pointers in the cone of the node.]
Description [Applicable to small AIGs only because no caching is performed.]
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ObjCleanData_rec( Hop_Obj_t * pObj )
{
assert( !Hop_IsComplement(pObj) );
assert( !Hop_ObjIsPo(pObj) );
if ( Hop_ObjIsAnd(pObj) )
{
Hop_ObjCleanData_rec( Hop_ObjFanin0(pObj) );
Hop_ObjCleanData_rec( Hop_ObjFanin1(pObj) );
}
pObj->pData = NULL;
}
/**Function*************************************************************
Synopsis [Detects multi-input gate rooted at this node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ObjCollectMulti_rec( Hop_Obj_t * pRoot, Hop_Obj_t * pObj, Vec_Ptr_t * vSuper )
{
if ( pRoot != pObj && (Hop_IsComplement(pObj) || Hop_ObjIsPi(pObj) || Hop_ObjType(pRoot) != Hop_ObjType(pObj)) )
{
Vec_PtrPushUnique(vSuper, pObj);
return;
}
Hop_ObjCollectMulti_rec( pRoot, Hop_ObjChild0(pObj), vSuper );
Hop_ObjCollectMulti_rec( pRoot, Hop_ObjChild1(pObj), vSuper );
}
/**Function*************************************************************
Synopsis [Detects multi-input gate rooted at this node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ObjCollectMulti( Hop_Obj_t * pRoot, Vec_Ptr_t * vSuper )
{
assert( !Hop_IsComplement(pRoot) );
Vec_PtrClear( vSuper );
Hop_ObjCollectMulti_rec( pRoot, pRoot, vSuper );
}
/**Function*************************************************************
Synopsis [Returns 1 if the node is the root of MUX or EXOR/NEXOR.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Hop_ObjIsMuxType( Hop_Obj_t * pNode )
{
Hop_Obj_t * pNode0, * pNode1;
// check that the node is regular
assert( !Hop_IsComplement(pNode) );
// if the node is not AND, this is not MUX
if ( !Hop_ObjIsAnd(pNode) )
return 0;
// if the children are not complemented, this is not MUX
if ( !Hop_ObjFaninC0(pNode) || !Hop_ObjFaninC1(pNode) )
return 0;
// get children
pNode0 = Hop_ObjFanin0(pNode);
pNode1 = Hop_ObjFanin1(pNode);
// if the children are not ANDs, this is not MUX
if ( !Hop_ObjIsAnd(pNode0) || !Hop_ObjIsAnd(pNode1) )
return 0;
// otherwise the node is MUX iff it has a pair of equal grandchildren
return (Hop_ObjFanin0(pNode0) == Hop_ObjFanin0(pNode1) && (Hop_ObjFaninC0(pNode0) ^ Hop_ObjFaninC0(pNode1))) ||
(Hop_ObjFanin0(pNode0) == Hop_ObjFanin1(pNode1) && (Hop_ObjFaninC0(pNode0) ^ Hop_ObjFaninC1(pNode1))) ||
(Hop_ObjFanin1(pNode0) == Hop_ObjFanin0(pNode1) && (Hop_ObjFaninC1(pNode0) ^ Hop_ObjFaninC0(pNode1))) ||
(Hop_ObjFanin1(pNode0) == Hop_ObjFanin1(pNode1) && (Hop_ObjFaninC1(pNode0) ^ Hop_ObjFaninC1(pNode1)));
}
/**Function*************************************************************
Synopsis [Recognizes what nodes are inputs of the EXOR.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Hop_ObjRecognizeExor( Hop_Obj_t * pObj, Hop_Obj_t ** ppFan0, Hop_Obj_t ** ppFan1 )
{
Hop_Obj_t * p0, * p1;
assert( !Hop_IsComplement(pObj) );
if ( !Hop_ObjIsNode(pObj) )
return 0;
if ( Hop_ObjIsExor(pObj) )
{
*ppFan0 = Hop_ObjChild0(pObj);
*ppFan1 = Hop_ObjChild1(pObj);
return 1;
}
assert( Hop_ObjIsAnd(pObj) );
p0 = Hop_ObjChild0(pObj);
p1 = Hop_ObjChild1(pObj);
if ( !Hop_IsComplement(p0) || !Hop_IsComplement(p1) )
return 0;
p0 = Hop_Regular(p0);
p1 = Hop_Regular(p1);
if ( !Hop_ObjIsAnd(p0) || !Hop_ObjIsAnd(p1) )
return 0;
if ( Hop_ObjFanin0(p0) != Hop_ObjFanin0(p1) || Hop_ObjFanin1(p0) != Hop_ObjFanin1(p1) )
return 0;
if ( Hop_ObjFaninC0(p0) == Hop_ObjFaninC0(p1) || Hop_ObjFaninC1(p0) == Hop_ObjFaninC1(p1) )
return 0;
*ppFan0 = Hop_ObjChild0(p0);
*ppFan1 = Hop_ObjChild1(p0);
return 1;
}
/**Function*************************************************************
Synopsis [Recognizes what nodes are control and data inputs of a MUX.]
Description [If the node is a MUX, returns the control variable C.
Assigns nodes T and E to be the then and else variables of the MUX.
Node C is never complemented. Nodes T and E can be complemented.
This function also recognizes EXOR/NEXOR gates as MUXes.]
SideEffects []
SeeAlso []
***********************************************************************/
Hop_Obj_t * Hop_ObjRecognizeMux( Hop_Obj_t * pNode, Hop_Obj_t ** ppNodeT, Hop_Obj_t ** ppNodeE )
{
Hop_Obj_t * pNode0, * pNode1;
assert( !Hop_IsComplement(pNode) );
assert( Hop_ObjIsMuxType(pNode) );
// get children
pNode0 = Hop_ObjFanin0(pNode);
pNode1 = Hop_ObjFanin1(pNode);
// find the control variable
if ( Hop_ObjFanin1(pNode0) == Hop_ObjFanin1(pNode1) && (Hop_ObjFaninC1(pNode0) ^ Hop_ObjFaninC1(pNode1)) )
{
// if ( Fraig_IsComplement(pNode1->p2) )
if ( Hop_ObjFaninC1(pNode0) )
{ // pNode2->p2 is positive phase of C
*ppNodeT = Hop_Not(Hop_ObjChild0(pNode1));//pNode2->p1);
*ppNodeE = Hop_Not(Hop_ObjChild0(pNode0));//pNode1->p1);
return Hop_ObjChild1(pNode1);//pNode2->p2;
}
else
{ // pNode1->p2 is positive phase of C
*ppNodeT = Hop_Not(Hop_ObjChild0(pNode0));//pNode1->p1);
*ppNodeE = Hop_Not(Hop_ObjChild0(pNode1));//pNode2->p1);
return Hop_ObjChild1(pNode0);//pNode1->p2;
}
}
else if ( Hop_ObjFanin0(pNode0) == Hop_ObjFanin0(pNode1) && (Hop_ObjFaninC0(pNode0) ^ Hop_ObjFaninC0(pNode1)) )
{
// if ( Fraig_IsComplement(pNode1->p1) )
if ( Hop_ObjFaninC0(pNode0) )
{ // pNode2->p1 is positive phase of C
*ppNodeT = Hop_Not(Hop_ObjChild1(pNode1));//pNode2->p2);
*ppNodeE = Hop_Not(Hop_ObjChild1(pNode0));//pNode1->p2);
return Hop_ObjChild0(pNode1);//pNode2->p1;
}
else
{ // pNode1->p1 is positive phase of C
*ppNodeT = Hop_Not(Hop_ObjChild1(pNode0));//pNode1->p2);
*ppNodeE = Hop_Not(Hop_ObjChild1(pNode1));//pNode2->p2);
return Hop_ObjChild0(pNode0);//pNode1->p1;
}
}
else if ( Hop_ObjFanin0(pNode0) == Hop_ObjFanin1(pNode1) && (Hop_ObjFaninC0(pNode0) ^ Hop_ObjFaninC1(pNode1)) )
{
// if ( Fraig_IsComplement(pNode1->p1) )
if ( Hop_ObjFaninC0(pNode0) )
{ // pNode2->p2 is positive phase of C
*ppNodeT = Hop_Not(Hop_ObjChild0(pNode1));//pNode2->p1);
*ppNodeE = Hop_Not(Hop_ObjChild1(pNode0));//pNode1->p2);
return Hop_ObjChild1(pNode1);//pNode2->p2;
}
else
{ // pNode1->p1 is positive phase of C
*ppNodeT = Hop_Not(Hop_ObjChild1(pNode0));//pNode1->p2);
*ppNodeE = Hop_Not(Hop_ObjChild0(pNode1));//pNode2->p1);
return Hop_ObjChild0(pNode0);//pNode1->p1;
}
}
else if ( Hop_ObjFanin1(pNode0) == Hop_ObjFanin0(pNode1) && (Hop_ObjFaninC1(pNode0) ^ Hop_ObjFaninC0(pNode1)) )
{
// if ( Fraig_IsComplement(pNode1->p2) )
if ( Hop_ObjFaninC1(pNode0) )
{ // pNode2->p1 is positive phase of C
*ppNodeT = Hop_Not(Hop_ObjChild1(pNode1));//pNode2->p2);
*ppNodeE = Hop_Not(Hop_ObjChild0(pNode0));//pNode1->p1);
return Hop_ObjChild0(pNode1);//pNode2->p1;
}
else
{ // pNode1->p2 is positive phase of C
*ppNodeT = Hop_Not(Hop_ObjChild0(pNode0));//pNode1->p1);
*ppNodeE = Hop_Not(Hop_ObjChild1(pNode1));//pNode2->p2);
return Hop_ObjChild1(pNode0);//pNode1->p2;
}
}
assert( 0 ); // this is not MUX
return NULL;
}
/**Function*************************************************************
Synopsis [Prints Eqn formula for the AIG rooted at this node.]
Description [The formula is in terms of PIs, which should have
their names assigned in pObj->pData fields.]
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ObjPrintEqn( FILE * pFile, Hop_Obj_t * pObj, Vec_Vec_t * vLevels, int Level )
{
Vec_Ptr_t * vSuper;
Hop_Obj_t * pFanin;
int fCompl, i;
// store the complemented attribute
fCompl = Hop_IsComplement(pObj);
pObj = Hop_Regular(pObj);
// constant case
if ( Hop_ObjIsConst1(pObj) )
{
fprintf( pFile, "%d", !fCompl );
return;
}
// PI case
if ( Hop_ObjIsPi(pObj) )
{
fprintf( pFile, "%s%s", fCompl? "!" : "", (char*)pObj->pData );
return;
}
// AND case
Vec_VecExpand( vLevels, Level );
vSuper = Vec_VecEntry(vLevels, Level);
Hop_ObjCollectMulti( pObj, vSuper );
fprintf( pFile, "%s", (Level==0? "" : "(") );
Vec_PtrForEachEntry( Hop_Obj_t *, vSuper, pFanin, i )
{
Hop_ObjPrintEqn( pFile, Hop_NotCond(pFanin, fCompl), vLevels, Level+1 );
if ( i < Vec_PtrSize(vSuper) - 1 )
fprintf( pFile, " %s ", fCompl? "+" : "*" );
}
fprintf( pFile, "%s", (Level==0? "" : ")") );
return;
}
/**Function*************************************************************
Synopsis [Prints Verilog formula for the AIG rooted at this node.]
Description [The formula is in terms of PIs, which should have
their names assigned in pObj->pData fields.]
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ObjPrintVerilog( FILE * pFile, Hop_Obj_t * pObj, Vec_Vec_t * vLevels, int Level, int fOnlyAnds )
{
Vec_Ptr_t * vSuper;
Hop_Obj_t * pFanin, * pFanin0, * pFanin1, * pFaninC;
int fCompl, i;
// store the complemented attribute
fCompl = Hop_IsComplement(pObj);
pObj = Hop_Regular(pObj);
// constant case
if ( Hop_ObjIsConst1(pObj) )
{
fprintf( pFile, "1\'b%d", !fCompl );
return;
}
// PI case
if ( Hop_ObjIsPi(pObj) )
{
fprintf( pFile, "%s%s", fCompl? "~" : "", (char*)pObj->pData );
return;
}
// EXOR case
if ( !fOnlyAnds && Hop_ObjIsExor(pObj) )
{
Vec_VecExpand( vLevels, Level );
vSuper = Vec_VecEntry( vLevels, Level );
Hop_ObjCollectMulti( pObj, vSuper );
fprintf( pFile, "%s", (Level==0? "" : "(") );
Vec_PtrForEachEntry( Hop_Obj_t *, vSuper, pFanin, i )
{
Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin, (fCompl && i==0)), vLevels, Level+1, fOnlyAnds );
if ( i < Vec_PtrSize(vSuper) - 1 )
fprintf( pFile, " ^ " );
}
fprintf( pFile, "%s", (Level==0? "" : ")") );
return;
}
// MUX case
if ( !fOnlyAnds && Hop_ObjIsMuxType(pObj) )
{
if ( Hop_ObjRecognizeExor( pObj, &pFanin0, &pFanin1 ) )
{
fprintf( pFile, "%s", (Level==0? "" : "(") );
Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin0, fCompl), vLevels, Level+1, fOnlyAnds );
fprintf( pFile, " ^ " );
Hop_ObjPrintVerilog( pFile, pFanin1, vLevels, Level+1, fOnlyAnds );
fprintf( pFile, "%s", (Level==0? "" : ")") );
}
else
{
pFaninC = Hop_ObjRecognizeMux( pObj, &pFanin1, &pFanin0 );
fprintf( pFile, "%s", (Level==0? "" : "(") );
Hop_ObjPrintVerilog( pFile, pFaninC, vLevels, Level+1, fOnlyAnds );
fprintf( pFile, " ? " );
Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin1, fCompl), vLevels, Level+1, fOnlyAnds );
fprintf( pFile, " : " );
Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin0, fCompl), vLevels, Level+1, fOnlyAnds );
fprintf( pFile, "%s", (Level==0? "" : ")") );
}
return;
}
// AND case
Vec_VecExpand( vLevels, Level );
vSuper = Vec_VecEntry(vLevels, Level);
Hop_ObjCollectMulti( pObj, vSuper );
fprintf( pFile, "%s", (Level==0? "" : "(") );
Vec_PtrForEachEntry( Hop_Obj_t *, vSuper, pFanin, i )
{
Hop_ObjPrintVerilog( pFile, Hop_NotCond(pFanin, fCompl), vLevels, Level+1, fOnlyAnds );
if ( i < Vec_PtrSize(vSuper) - 1 )
fprintf( pFile, " %s ", fCompl? "|" : "&" );
}
fprintf( pFile, "%s", (Level==0? "" : ")") );
return;
}
/**Function*************************************************************
Synopsis [Prints node in HAIG.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ObjPrintVerbose( Hop_Obj_t * pObj, int fHaig )
{
assert( !Hop_IsComplement(pObj) );
printf( "Node %p : ", pObj );
if ( Hop_ObjIsConst1(pObj) )
printf( "constant 1" );
else if ( Hop_ObjIsPi(pObj) )
printf( "PI" );
else
printf( "AND( %p%s, %p%s )",
Hop_ObjFanin0(pObj), (Hop_ObjFaninC0(pObj)? "\'" : " "),
Hop_ObjFanin1(pObj), (Hop_ObjFaninC1(pObj)? "\'" : " ") );
printf( " (refs = %3d)", Hop_ObjRefs(pObj) );
}
/**Function*************************************************************
Synopsis [Prints node in HAIG.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ManPrintVerbose( Hop_Man_t * p, int fHaig )
{
Vec_Ptr_t * vNodes;
Hop_Obj_t * pObj;
int i;
printf( "PIs: " );
Hop_ManForEachPi( p, pObj, i )
printf( " %p", pObj );
printf( "\n" );
vNodes = Hop_ManDfs( p );
Vec_PtrForEachEntry( Hop_Obj_t *, vNodes, pObj, i )
Hop_ObjPrintVerbose( pObj, fHaig ), printf( "\n" );
printf( "\n" );
Vec_PtrFree( vNodes );
}
/**Function*************************************************************
Synopsis [Writes the AIG into the BLIF file.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Hop_ManDumpBlif( Hop_Man_t * p, char * pFileName )
{
FILE * pFile;
Vec_Ptr_t * vNodes;
Hop_Obj_t * pObj, * pConst1 = NULL;
int i, nDigits, Counter = 0;
if ( Hop_ManPoNum(p) == 0 )
{
printf( "Hop_ManDumpBlif(): AIG manager does not have POs.\n" );
return;
}
// collect nodes in the DFS order
vNodes = Hop_ManDfs( p );
// assign IDs to objects
Hop_ManConst1(p)->pData = (void *)(ABC_PTRUINT_T)Counter++;
Hop_ManForEachPi( p, pObj, i )
pObj->pData = (void *)(ABC_PTRUINT_T)Counter++;
Hop_ManForEachPo( p, pObj, i )
pObj->pData = (void *)(ABC_PTRUINT_T)Counter++;
Vec_PtrForEachEntry( Hop_Obj_t *, vNodes, pObj, i )
pObj->pData = (void *)(ABC_PTRUINT_T)Counter++;
nDigits = Hop_Base10Log( Counter );
// write the file
pFile = fopen( pFileName, "w" );
fprintf( pFile, "# BLIF file written by procedure Hop_ManDumpBlif() in ABC\n" );
fprintf( pFile, "# http://www.eecs.berkeley.edu/~alanmi/abc/\n" );
fprintf( pFile, ".model test\n" );
// write PIs
fprintf( pFile, ".inputs" );
Hop_ManForEachPi( p, pObj, i )
fprintf( pFile, " n%0*d", nDigits, (int)(ABC_PTRUINT_T)pObj->pData );
fprintf( pFile, "\n" );
// write POs
fprintf( pFile, ".outputs" );
Hop_ManForEachPo( p, pObj, i )
fprintf( pFile, " n%0*d", nDigits, (int)(ABC_PTRUINT_T)pObj->pData );
fprintf( pFile, "\n" );
// write nodes
Vec_PtrForEachEntry( Hop_Obj_t *, vNodes, pObj, i )
{
fprintf( pFile, ".names n%0*d n%0*d n%0*d\n",
nDigits, (int)(ABC_PTRUINT_T)Hop_ObjFanin0(pObj)->pData,
nDigits, (int)(ABC_PTRUINT_T)Hop_ObjFanin1(pObj)->pData,
nDigits, (int)(ABC_PTRUINT_T)pObj->pData );
fprintf( pFile, "%d%d 1\n", !Hop_ObjFaninC0(pObj), !Hop_ObjFaninC1(pObj) );
}
// write POs
Hop_ManForEachPo( p, pObj, i )
{
fprintf( pFile, ".names n%0*d n%0*d\n",
nDigits, (int)(ABC_PTRUINT_T)Hop_ObjFanin0(pObj)->pData,
nDigits, (int)(ABC_PTRUINT_T)pObj->pData );
fprintf( pFile, "%d 1\n", !Hop_ObjFaninC0(pObj) );
if ( Hop_ObjIsConst1(Hop_ObjFanin0(pObj)) )
pConst1 = Hop_ManConst1(p);
}
if ( pConst1 )
fprintf( pFile, ".names n%0*d\n 1\n", nDigits, (int)(ABC_PTRUINT_T)pConst1->pData );
fprintf( pFile, ".end\n\n" );
fclose( pFile );
Vec_PtrFree( vNodes );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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