saigDual.c File Reference

#include "saig.h"

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Functions
Aig_Man_t *	Saig_ManDupDual (Aig_Man_t *pAig, Vec_Int_t *vDcFlops, int nDualPis, int fDualFfs, int fMiterFfs, int fComplPo, int fCheckZero, int fCheckOne)
	FUNCTION DEFINITIONS ///.
void	Saig_ManBlockPo (Aig_Man_t *pAig, int nCycles)

Function Documentation

Saig_ManBlockPo()

void Saig_ManBlockPo	(	Aig_Man_t *	pAig,
		int	nCycles )

Function*************************************************************

Synopsis [Transforms sequential AIG to block the PO for N cycles.]

Description [This procedure should be applied to a safety property miter to make the propetry 'true' (const 0) during the first N cycles.]

SideEffects []

SeeAlso []

Definition at line 209 of file saigDual.c.

{
    Aig_Obj_t * pObj, * pCond, * pPrev, * pTemp;
    int i;
    assert( nCycles > 0 );
    // add N flops (assuming 1-hot encoding of cycles)
    pPrev = Aig_ManConst1(pAig);
    pCond = Aig_ManConst1(pAig);
    for ( i = 0; i < nCycles; i++ )
    {
        Aig_ObjCreateCo( pAig, pPrev );
        pPrev = Aig_ObjCreateCi( pAig );
        pCond = Aig_And( pAig, pCond, pPrev );
    }
    // update the POs
    Saig_ManForEachPo( pAig, pObj, i )
    {
        pTemp = Aig_And( pAig, Aig_ObjChild0(pObj), pCond );
        Aig_ObjPatchFanin0( pAig, pObj, pTemp );
    }
    // set the flops
    Aig_ManSetRegNum( pAig, Aig_ManRegNum(pAig) + nCycles );
    Aig_ManCleanup( pAig );
}

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Saig_ManDupDual()

Aig_Man_t * Saig_ManDupDual	(	Aig_Man_t *	pAig,
		Vec_Int_t *	vDcFlops,
		int	nDualPis,
		int	fDualFfs,
		int	fMiterFfs,
		int	fComplPo,
		int	fCheckZero,
		int	fCheckOne )

FUNCTION DEFINITIONS ///.

Function*************************************************************

Synopsis [Transforms sequential AIG into dual-rail miter.]

Description [Transforms sequential AIG into a miter encoding ternary problem formulated as follows "none of the POs has a ternary value". Interprets the first nDualPis as having ternary value. Sets flops to have ternary intial value when fDualFfs is set to 1.]

SideEffects []

SeeAlso []

Definition at line 81 of file saigDual.c.

{
    Vec_Ptr_t * vCopies;
    Aig_Man_t * pAigNew;
    Aig_Obj_t * pObj, * pTemp0, * pTemp1, * pTemp2, * pTemp3, * pCare, * pMiter;
    int i;
    assert( Saig_ManPoNum(pAig) > 0 );
    assert( nDualPis >= 0 && nDualPis <= Saig_ManPiNum(pAig) );
    assert( vDcFlops == NULL || Vec_IntSize(vDcFlops) == Aig_ManRegNum(pAig) );
    vCopies = Vec_PtrStart( 2*Aig_ManObjNum(pAig) );
    // start the new manager
    pAigNew = Aig_ManStart( Aig_ManNodeNum(pAig) );
    pAigNew->pName = Abc_UtilStrsav( pAig->pName );
    // map the constant node
    Saig_ObjSetDual( vCopies, 0, 0, Aig_ManConst0(pAigNew) );
    Saig_ObjSetDual( vCopies, 0, 1, Aig_ManConst1(pAigNew) );
    // create variables for PIs
    Aig_ManForEachCi( pAig, pObj, i )
    {
        if ( i < nDualPis )
        {
            pTemp0 = Aig_ObjCreateCi( pAigNew );
            pTemp1 = Aig_ObjCreateCi( pAigNew );
        }
        else if ( i < Saig_ManPiNum(pAig) )
        {
            pTemp1 = Aig_ObjCreateCi( pAigNew );
            pTemp0 = Aig_Not( pTemp1 );
        }
        else
        {
            pTemp0 = Aig_ObjCreateCi( pAigNew );
            pTemp1 = Aig_ObjCreateCi( pAigNew );
            if ( vDcFlops )
                pTemp0 = Aig_NotCond( pTemp0, !Vec_IntEntry(vDcFlops, i-Saig_ManPiNum(pAig)) );
            else
                pTemp0 = Aig_NotCond( pTemp0, !fDualFfs );
        }
        Saig_ObjSetDual( vCopies, Aig_ObjId(pObj), 0, Aig_And(pAigNew, pTemp0, Aig_Not(pTemp1)) );
        Saig_ObjSetDual( vCopies, Aig_ObjId(pObj), 1, Aig_And(pAigNew, pTemp1, Aig_Not(pTemp0)) );
    }
    // create internal nodes
    Aig_ManForEachNode( pAig, pObj, i )
    {
        Saig_ObjDualFanin( pAigNew, vCopies, pObj, 0, &pTemp0, &pTemp1 );
        Saig_ObjDualFanin( pAigNew, vCopies, pObj, 1, &pTemp2, &pTemp3 );
        Saig_ObjSetDual( vCopies, Aig_ObjId(pObj), 0, Aig_Or (pAigNew, pTemp0, pTemp2) );
        Saig_ObjSetDual( vCopies, Aig_ObjId(pObj), 1, Aig_And(pAigNew, pTemp1, pTemp3) );
    }
    // create miter and flops
    pMiter = Aig_ManConst0(pAigNew);
    if ( fMiterFfs )
    {
        Saig_ManForEachLi( pAig, pObj, i )
        {
            Saig_ObjDualFanin( pAigNew, vCopies, pObj, 0, &pTemp0, &pTemp1 );
            if ( fCheckZero )
            {
                pCare  = Aig_And( pAigNew, pTemp0, Aig_Not(pTemp1) );
                pMiter = Aig_Or( pAigNew, pMiter, pCare );
            }
            else if ( fCheckOne )
            {
                pCare  = Aig_And( pAigNew, Aig_Not(pTemp0), pTemp1 );
                pMiter = Aig_Or( pAigNew, pMiter, pCare );
            }
            else // check X
            {
                pCare  = Aig_And( pAigNew, Aig_Not(pTemp0), Aig_Not(pTemp1) );
                pMiter = Aig_Or( pAigNew, pMiter, pCare );
            }
        }
    }
    else
    {
        Saig_ManForEachPo( pAig, pObj, i )
        {
            Saig_ObjDualFanin( pAigNew, vCopies, pObj, 0, &pTemp0, &pTemp1 );
            if ( fCheckZero )
            {
                pCare  = Aig_And( pAigNew, pTemp0, Aig_Not(pTemp1) );
                pMiter = Aig_Or( pAigNew, pMiter, pCare );
            }
            else if ( fCheckOne )
            {
                pCare  = Aig_And( pAigNew, Aig_Not(pTemp0), pTemp1 );
                pMiter = Aig_Or( pAigNew, pMiter, pCare );
            }
            else // check X
            {
                pCare  = Aig_And( pAigNew, Aig_Not(pTemp0), Aig_Not(pTemp1) );
                pMiter = Aig_Or( pAigNew, pMiter, pCare );
            }
        }
    }
    // create PO
    pMiter = Aig_NotCond( pMiter, fComplPo );
    Aig_ObjCreateCo( pAigNew, pMiter );
    // create flops
    Saig_ManForEachLi( pAig, pObj, i )
    {
        Saig_ObjDualFanin( pAigNew, vCopies, pObj, 0, &pTemp0, &pTemp1 );
        if ( vDcFlops )
            pTemp0 = Aig_NotCond( pTemp0, !Vec_IntEntry(vDcFlops, i) );
        else
            pTemp0 = Aig_NotCond( pTemp0, !fDualFfs );
        Aig_ObjCreateCo( pAigNew, pTemp0 );
        Aig_ObjCreateCo( pAigNew, pTemp1 );
    }
    // set the flops
    Aig_ManSetRegNum( pAigNew, 2 * Aig_ManRegNum(pAig) );
    Aig_ManCleanup( pAigNew );
    Vec_PtrFree( vCopies );
    return pAigNew;
}

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