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Bit-blasting Booth multipliers.

This commit is contained in:
Alan Mishchenko 2016-07-04 20:41:50 -07:00
parent f3ecc3ffaa
commit 3ad4be259e
1 changed files with 79 additions and 4 deletions
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83
src/base/wlc/wlcBlast.c
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@ -635,7 +635,7 @@ void Wlc_IntInsert( Vec_Int_t * vProd, Vec_Int_t * vLevel, int Node, int Level )
Vec_IntInsert( vProd, i + 1, Node );
Vec_IntInsert( vLevel, i + 1, Level );
}
void Wlc_BlastReduceMatrix( Gia_Man_t * pNew, Vec_Wec_t * vProds, Vec_Wec_t * vLevels, Vec_Int_t * vRes )
void Wlc_BlastReduceMatrix( Gia_Man_t * pNew, Vec_Wec_t * vProds, Vec_Wec_t * vLevels, Vec_Int_t * vRes, int nSizeMax )
{
Vec_Int_t * vLevel, * vProd;
int i, NodeS, NodeC, LevelS, LevelC, Node1, Node2, Node3, Level1, Level2, Level3;
@ -680,6 +680,7 @@ void Wlc_BlastReduceMatrix( Gia_Man_t * pNew, Vec_Wec_t * vProds, Vec_Wec_t * vL
Vec_IntPush( vProd, 0 );
assert( Vec_IntSize(vProd) == 2 );
}
// Vec_WecPrint( vProds, 0 );
vLevel = Vec_WecEntry( vLevels, 0 );
Vec_IntClear( vRes );
@ -690,7 +691,7 @@ void Wlc_BlastReduceMatrix( Gia_Man_t * pNew, Vec_Wec_t * vProds, Vec_Wec_t * vL
Vec_IntPush( vRes, Vec_IntEntry(vProd, 0) );
Vec_IntPush( vLevel, Vec_IntEntry(vProd, 1) );
}
Wlc_BlastAdder( pNew, Vec_IntArray(vRes), Vec_IntArray(vLevel), nSize );
Wlc_BlastAdder( pNew, Vec_IntArray(vRes), Vec_IntArray(vLevel), nSizeMax );
}
void Wlc_BlastMultiplier3( Gia_Man_t * pNew, int * pArgA, int * pArgB, int nArgA, int nArgB, Vec_Int_t * vRes )
{
@ -704,7 +705,7 @@ void Wlc_BlastMultiplier3( Gia_Man_t * pNew, int * pArgA, int * pArgB, int nArgA
Vec_WecPush( vLevels, i+k, 0 );
}
Wlc_BlastReduceMatrix( pNew, vProds, vLevels, vRes );
Wlc_BlastReduceMatrix( pNew, vProds, vLevels, vRes, nArgA + nArgB );
Vec_WecFree( vProds );
Vec_WecFree( vLevels );
@ -729,11 +730,84 @@ void Wlc_BlastSquare( Gia_Man_t * pNew, int * pNum, int nNum, Vec_Int_t * vTmp,
}
}
Wlc_BlastReduceMatrix( pNew, vProds, vLevels, vRes );
Wlc_BlastReduceMatrix( pNew, vProds, vLevels, vRes, 2*nNum );
Vec_WecFree( vProds );
Vec_WecFree( vLevels );
}
void Wlc_BlastBooth( Gia_Man_t * pNew, int * pArgA, int * pArgB, int nArgA, int nArgB, Vec_Int_t * vRes, int fSigned )
{
Vec_Wec_t * vProds = Vec_WecStart( nArgA + nArgB );
Vec_Wec_t * vLevels = Vec_WecStart( nArgA + nArgB );
int FillA = fSigned ? pArgA[nArgA-1] : 0;
int FillB = fSigned ? pArgB[nArgB-1] : 0;
int i, k, Sign;
// create new arguments
Vec_Int_t * vArgB = Vec_IntAlloc( nArgB + 3 );
Vec_IntPush( vArgB, 0 );
for ( i = 0; i < nArgB; i++ )
Vec_IntPush( vArgB, pArgB[i] );
Vec_IntPush( vArgB, FillB );
if ( Vec_IntSize(vArgB) % 2 == 0 )
Vec_IntPush( vArgB, FillB );
assert( Vec_IntSize(vArgB) % 2 == 1 );
// iterate through bit-pairs
for ( k = 0; k+2 < Vec_IntSize(vArgB); k+=2 )
{
int pp = -1;
int Q2jM1 = Vec_IntEntry(vArgB, k); // q(2*j-1)
int Q2j = Vec_IntEntry(vArgB, k+1); // q(2*j+0)
int Q2jP1 = Vec_IntEntry(vArgB, k+2); // q(2*j+1)
int Neg = Q2jP1;
int One = Gia_ManHashXor( pNew, Q2j, Q2jM1 );
int Two = Gia_ManHashMux( pNew, Neg, Gia_ManHashAnd(pNew, Abc_LitNot(Q2j), Abc_LitNot(Q2jM1)), Gia_ManHashAnd(pNew, Q2j, Q2jM1) );
for ( i = 0; i <= nArgA; i++ )
{
int This = i == nArgA ? FillA : pArgA[i];
int Prev = i ? pArgA[i-1] : 0;
int Part = Gia_ManHashOr( pNew, Gia_ManHashAnd(pNew, One, This), Gia_ManHashAnd(pNew, Two, Prev) );
pp = Gia_ManHashXor( pNew, Part, Neg );
Vec_WecPush( vProds, k+i, pp );
Vec_WecPush( vLevels, k+i, 0 );
}
// perform sign extension
Sign = fSigned ? pp : Neg;
if ( k == 0 )
{
Vec_WecPush( vProds, k+i, Sign );
Vec_WecPush( vLevels, k+i, 0 );
Vec_WecPush( vProds, k+i+1, Sign );
Vec_WecPush( vLevels, k+i+1, 0 );
Vec_WecPush( vProds, k+i+2, Abc_LitNot(Sign) );
Vec_WecPush( vLevels, k+i+2, 0 );
}
else
{
Vec_WecPush( vProds, k+i, Abc_LitNot(Sign) );
Vec_WecPush( vLevels, k+i, 0 );
Vec_WecPush( vProds, k+i+1, 1 );
Vec_WecPush( vLevels, k+i+1, 0 );
}
// add neg to the first column
if ( Neg == 0 )
continue;
Vec_WecPush( vProds, k, Neg );
Vec_WecPush( vLevels, k, 0 );
}
// Vec_WecPrint( vProds, 0 );
Wlc_BlastReduceMatrix( pNew, vProds, vLevels, vRes, nArgA + nArgB );
Vec_WecFree( vProds );
Vec_WecFree( vLevels );
Vec_IntFree( vArgB );
}
/**Function*************************************************************
@ -1156,6 +1230,7 @@ Gia_Man_t * Wlc_NtkBitBlast( Wlc_Ntk_t * p, Vec_Int_t * vBoxIds, int fGiaSimple,
if ( Wlc_NtkCountConstBits(pArg0, nRangeMax) < Wlc_NtkCountConstBits(pArg1, nRangeMax) )
ABC_SWAP( int *, pArg0, pArg1 );
Wlc_BlastMultiplier( pNew, pArg0, pArg1, nRangeMax, nRangeMax, vTemp2, vRes, fSigned );
//Wlc_BlastBooth( pNew, pArg0, pArg1, nRange0, nRange1, vRes, fSigned );
//Wlc_BlastMultiplier3( pNew, pArg0, pArg1, nRange0, nRange1, vRes );
if ( nRange > nRangeMax + nRangeMax )
Vec_IntFillExtra( vRes, nRange, fSigned ? Vec_IntEntryLast(vRes) : 0 );