From 33971604cf9187a473fa6de335e4849365bbf106 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Sat, 24 Feb 2018 09:50:24 -0800
Subject: Adding support for adders with carry-in in WLC and NDR.

---
 src/base/wlc/wlcBlast.c    | 11 ++++++-----
 src/base/wlc/wlcCom.c      |  1 +
 src/base/wlc/wlcReadVer.c  |  6 ++++++
 src/base/wlc/wlcWriteVer.c |  2 ++
 4 files changed, 15 insertions(+), 5 deletions(-)

(limited to 'src/base')

diff --git a/src/base/wlc/wlcBlast.c b/src/base/wlc/wlcBlast.c
index 849f1bb0..37ea3186 100644
--- a/src/base/wlc/wlcBlast.c
+++ b/src/base/wlc/wlcBlast.c
@@ -339,9 +339,9 @@ void Wlc_BlastFullAdder( Gia_Man_t * pNew, int a, int b, int c, int * pc, int *
     if ( fCompl )
         *ps = Abc_LitNot(*ps), *pc = Abc_LitNot(*pc); 
 }
-void Wlc_BlastAdder( Gia_Man_t * pNew, int * pAdd0, int * pAdd1, int nBits ) // result is in pAdd0
+void Wlc_BlastAdder( Gia_Man_t * pNew, int * pAdd0, int * pAdd1, int nBits, int Carry ) // result is in pAdd0
 {
-    int b, Carry = 0;
+    int b;
     for ( b = 0; b < nBits; b++ )
         Wlc_BlastFullAdder( pNew, pAdd0[b], pAdd1[b], Carry, &Carry, &pAdd0[b] );
 }
@@ -421,7 +421,7 @@ void Wlc_BlastMultiplier2( Gia_Man_t * pNew, int * pArg0, int * pArg1, int nBits
         for ( j = 0; Vec_IntSize(vTemp) < nBits; j++ )
             Vec_IntPush( vTemp, Gia_ManHashAnd(pNew, pArg0[j], pArg1[i]) );
         assert( Vec_IntSize(vTemp) == nBits );
-        Wlc_BlastAdder( pNew, Vec_IntArray(vRes), Vec_IntArray(vTemp), nBits );
+        Wlc_BlastAdder( pNew, Vec_IntArray(vRes), Vec_IntArray(vTemp), nBits, 0 );
     }
 }
 void Wlc_BlastFullAdderCtrl( Gia_Man_t * pNew, int a, int ac, int b, int c, int * pc, int * ps, int fNeg )
@@ -758,7 +758,7 @@ void Wlc_BlastReduceMatrix( Gia_Man_t * pNew, Vec_Wec_t * vProds, Vec_Wec_t * vL
     }
     Vec_IntPush( vRes,   0 );
     Vec_IntPush( vLevel, 0 );
-    Wlc_BlastAdder( pNew, Vec_IntArray(vRes), Vec_IntArray(vLevel), Vec_IntSize(vRes) );
+    Wlc_BlastAdder( pNew, Vec_IntArray(vRes), Vec_IntArray(vLevel), Vec_IntSize(vRes), 0 );
 }
 void Wlc_BlastMultiplier3( Gia_Man_t * pNew, int * pArgA, int * pArgB, int nArgA, int nArgB, Vec_Int_t * vRes )
 {
@@ -1314,8 +1314,9 @@ Gia_Man_t * Wlc_NtkBitBlast( Wlc_Ntk_t * p, Vec_Int_t * vBoxIds, int iOutput, in
             int nRangeMax = Abc_MaxInt( nRange, Abc_MaxInt(nRange0, nRange1) );
             int * pArg0 = Wlc_VecLoadFanins( vRes,   pFans0, nRange0, nRangeMax, Wlc_ObjIsSignedFanin01(p, pObj) );
             int * pArg1 = Wlc_VecLoadFanins( vTemp1, pFans1, nRange1, nRangeMax, Wlc_ObjIsSignedFanin01(p, pObj) );
+            int CarryIn = Wlc_ObjFaninNum(pObj) == 3 ? pFans2[0] : 0;
             if ( pObj->Type == WLC_OBJ_ARI_ADD )
-                Wlc_BlastAdder( pNew, pArg0, pArg1, nRange ); // result is in pFan0 (vRes)
+                Wlc_BlastAdder( pNew, pArg0, pArg1, nRange, CarryIn ); // result is in pFan0 (vRes)
 //                Wlc_BlastAdderCLA( pNew, pArg0, pArg1, nRange ); // result is in pFan0 (vRes)
             else 
                 Wlc_BlastSubtract( pNew, pArg0, pArg1, nRange ); // result is in pFan0 (vRes)
diff --git a/src/base/wlc/wlcCom.c b/src/base/wlc/wlcCom.c
index 8f7592d6..bef1ccb4 100644
--- a/src/base/wlc/wlcCom.c
+++ b/src/base/wlc/wlcCom.c
@@ -20,6 +20,7 @@
 
 #include "wlc.h"
 #include "base/main/mainInt.h"
+#include "aig/miniaig/ndr.h"
 
 ABC_NAMESPACE_IMPL_START
 
diff --git a/src/base/wlc/wlcReadVer.c b/src/base/wlc/wlcReadVer.c
index c615d9fb..f2d482f7 100644
--- a/src/base/wlc/wlcReadVer.c
+++ b/src/base/wlc/wlcReadVer.c
@@ -801,6 +801,12 @@ static inline int Wlc_PrsFindDefinition( Wlc_Prs_t * p, char * pStr, Vec_Int_t *
             if ( !(pStr = Wlc_PrsReadName(p, pStr+1, vFanins)) )
                 return 0;
             pStr = Wlc_PrsSkipSpaces( pStr );
+            if ( Type == WLC_OBJ_ARI_ADD && pStr[0] == '+' )
+            {
+                if ( !(pStr = Wlc_PrsReadName(p, pStr+1, vFanins)) )
+                    return 0;
+                pStr = Wlc_PrsSkipSpaces( pStr );
+            }
             if ( pStr[0] )
                 printf( "Warning: Trailing symbols \"%s\" in line %d.\n", pStr, Wlc_PrsFindLine(p, pStr) );
         }
diff --git a/src/base/wlc/wlcWriteVer.c b/src/base/wlc/wlcWriteVer.c
index c4dee094..b66c12d2 100644
--- a/src/base/wlc/wlcWriteVer.c
+++ b/src/base/wlc/wlcWriteVer.c
@@ -355,6 +355,8 @@ void Wlc_WriteVerInt( FILE * pFile, Wlc_Ntk_t * p, int fNoFlops )
                 else assert( 0 );
                     //fprintf( pFile, "???" );
                 fprintf( pFile, " %s", Wlc_ObjName(p, Wlc_ObjFaninId(pObj, 1)) );
+                if ( Wlc_ObjFaninNum(pObj) == 3 && pObj->Type == WLC_OBJ_ARI_ADD ) 
+                    fprintf( pFile, " + %s", Wlc_ObjName(p, Wlc_ObjFaninId(pObj, 2)) );
             }
         }
         fprintf( pFile, " ;%s\n", (p->fSmtLib && Wlc_ObjIsSigned(pObj)) ? " // signed SMT-LIB operator" : "" );
-- 
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