From f844fb10575921a51e043da95e29023627166915 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Fri, 8 Sep 2023 16:46:14 +0700
Subject: [PATCH] Command to add one flop to the design.

---
 src/aig/gia/giaDup.c | 30 +++++++++++++++++++++++++++
 src/base/abci/abc.c  | 48 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)

diff --git a/src/aig/gia/giaDup.c b/src/aig/gia/giaDup.c
index f836dc3e5..2a947ed9c 100644
--- a/src/aig/gia/giaDup.c
+++ b/src/aig/gia/giaDup.c
@@ -5625,6 +5625,36 @@ void Gia_ManProdAdderGen( int nArgA, int nArgB, int Seed, int fSigned, int fCla
     Vec_IntFree( vRes );
 }
 
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Gia_Man_t * Gia_ManDupAddFlop( Gia_Man_t * p )
+{
+    Gia_Man_t * pNew;
+    Gia_Obj_t * pObj;
+    int i;
+    pNew = Gia_ManStart( Gia_ManObjNum(p) + 2 );
+    Gia_ManConst0(p)->Value = 0;
+    Gia_ManForEachCi( p, pObj, i )
+        pObj->Value = Gia_ManAppendCi( pNew );
+    Gia_ManAppendCi( pNew );
+    Gia_ManForEachAnd( p, pObj, i )
+        pObj->Value = Gia_ManAppendAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) );
+    Gia_ManForEachCo( p, pObj, i )
+        Gia_ManAppendCo( pNew, Gia_ObjFanin0Copy(pObj) );
+    Gia_ManAppendCo( pNew, 0 );    
+    Gia_ManSetRegNum( pNew, Gia_ManRegNum(p)+1 );
+    return pNew;
+}
+
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///
 ////////////////////////////////////////////////////////////////////////
diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index f81060475..eada29fd6 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -593,6 +593,7 @@ static int Abc_CommandAbc9Gla2Fla            ( Abc_Frame_t * pAbc, int argc, cha
 static int Abc_CommandAbc9Gen                ( Abc_Frame_t * pAbc, int argc, char ** argv );
 static int Abc_CommandAbc9Cfs                ( Abc_Frame_t * pAbc, int argc, char ** argv );
 static int Abc_CommandAbc9ProdAdd            ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int Abc_CommandAbc9AddFlop            ( Abc_Frame_t * pAbc, int argc, char ** argv );
 
 static int Abc_CommandAbc9Test               ( Abc_Frame_t * pAbc, int argc, char ** argv );
 
@@ -1360,6 +1361,7 @@ void Abc_Init( Abc_Frame_t * pAbc )
     Cmd_CommandAdd( pAbc, "ABC9",         "&gen",          Abc_CommandAbc9Gen,                    0 );
     Cmd_CommandAdd( pAbc, "ABC9",         "&cfs",          Abc_CommandAbc9Cfs,                    0 );
     Cmd_CommandAdd( pAbc, "ABC9",         "&prodadd",      Abc_CommandAbc9ProdAdd,                0 );
+    Cmd_CommandAdd( pAbc, "ABC9",         "&addflop",      Abc_CommandAbc9AddFlop,                0 );    
 
     Cmd_CommandAdd( pAbc, "ABC9",         "&test",         Abc_CommandAbc9Test,         0 );
     {
@@ -51438,6 +51440,52 @@ usage:
     return 1;
 }
 
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+int Abc_CommandAbc9AddFlop( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    extern Gia_Man_t * Gia_ManDupAddFlop( Gia_Man_t * p );
+    Gia_Man_t * pTemp;
+    int c, fVerbose = 0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "vh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( pAbc->pGia == NULL )
+    {
+        Abc_Print( -1, "Abc_CommandAbc9Decla(): There is no AIG.\n" );
+        return 0;
+    }
+    pTemp = Gia_ManDupAddFlop( pAbc->pGia );
+    Abc_FrameUpdateGia( pAbc, pTemp );
+    return 0;
+
+usage:
+    Abc_Print( -2, "usage: &addflop [-vh]\n" );
+    Abc_Print( -2, "\t         adds one flop to the design\n" );
+    Abc_Print( -2, "\t-v     : toggles printing verbose information [default = %s]\n",  fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
 
 /**Function*************************************************************