text: /**CFile***********************************************************************
   
    FileName    [ntrZddTest.c]
  
    PackageName [ntr]
  
    Synopsis    [ZDD test functions.]
  
    Description []
  
    SeeAlso     []
  
    Author      [Fabio Somenzi]
     
    Copyright   [Copyright (c) 1995-2012, Regents of the University of Colorado
  
    All rights reserved.
  
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
  
    Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
  
    Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
  
    Neither the name of the University of Colorado nor the names of its
    contributors may be used to endorse or promote products derived from
    this software without specific prior written permission.
  
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.]
  
  ******************************************************************************/
  
  #include "ntr.h"
  #include "cuddInt.h"
  
  /*---------------------------------------------------------------------------*/
  /* Constant declarations                                                     */
  /*---------------------------------------------------------------------------*/
  
  /*---------------------------------------------------------------------------*/
  /* Stucture declarations                                                     */
  /*---------------------------------------------------------------------------*/
  
  /*---------------------------------------------------------------------------*/
  /* Type declarations                                                         */
  /*---------------------------------------------------------------------------*/
  
  /*---------------------------------------------------------------------------*/
  /* Variable declarations                                                     */
  /*---------------------------------------------------------------------------*/
  
  #ifndef lint
  static char rcsid[] UTIL_UNUSED = "$Id: ntrZddTest.c,v 1.15 2012/02/05 01:53:01 fabio Exp fabio $";
  #endif
  
  /*---------------------------------------------------------------------------*/
  /* Macro declarations                                                        */
  /*---------------------------------------------------------------------------*/
  
  /**AutomaticStart*************************************************************/
  
  /*---------------------------------------------------------------------------*/
  /* Static function prototypes                                                */
  /*---------------------------------------------------------------------------*/
  
  static int reorderZdd (BnetNetwork *net, DdManager *dd, NtrOptions *option);
  
  /**AutomaticEnd***************************************************************/
  
  /*---------------------------------------------------------------------------*/
  /* Definition of exported functions                                          */
  /*---------------------------------------------------------------------------*/
  
  
  /**Function********************************************************************
  
    Synopsis    [Tests ZDDs.]
  
    Description [Tests ZDDs. Returns 1 if successful; 0 otherwise.]
  
    SideEffects [Creates ZDD variables in the manager.]
  
    SeeAlso     []
  
  ******************************************************************************/
  int
  Ntr_testZDD(
    DdManager * dd,
    BnetNetwork * net,
    NtrOptions * option)
  {
      DdNode **zdd;		/* array of converted outputs */
      int nz;			/* actual number of ZDDs */
      int result;
      int i, j;
      BnetNode *node;		/* auxiliary pointer to network node */
      int pr = option->verb;
      int level;			/* aux. var. used to print variable orders */
      char **names;		/* array used to print variable orders */
      int nvars;
  
      /* Build an array of ZDDs for the output functions or for the
      ** specified node. */
      Cudd_AutodynDisable(dd);
      Cudd_AutodynDisableZdd(dd);
      zdd = ALLOC(DdNode *,net->noutputs);
      result = Cudd_zddVarsFromBddVars(dd,1);
      if (result == 0) return(0);
      if (option->node == NULL) {
  	for (nz = 0; nz < net->noutputs; nz++) {
  	    if (!st_lookup(net->hash,net->outputs[nz],&node)) {
  		return(0);
  	    }
  	    zdd[nz] = Cudd_zddPortFromBdd(dd, node->dd);
  	    if (zdd[nz]) {
  		Cudd_Ref(zdd[nz]);
  		(void) printf("%s", node->name);
  		result = Cudd_zddPrintDebug(dd,zdd[nz],Cudd_ReadZddSize(dd),pr);
  		if (result == 0) return(0);
  	    } else {
  		(void) printf("Conversion to ZDD failed.\n");
  	    }
  	}
      } else {
  	if (!st_lookup(net->hash,option->node,&node)) {
  	    return(0);
  	}
  	zdd[0] = Cudd_zddPortFromBdd(dd, node->dd);
  	if (zdd[0]) {
  	    Cudd_Ref(zdd[0]);
  	    (void) printf("%s", node->name);
  	    result = Cudd_zddPrintDebug(dd,zdd[0],Cudd_ReadZddSize(dd),pr);
  	    if (result == 0) return(0);
  	} else {
  	    (void) printf("Conversion to ZDD failed.\n");
  	}
  	nz = 1;
      }
  
  #ifdef DD_DEBUG
      result = Cudd_CheckKeys(dd);
      if (result != 0) {
  	(void) fprintf(stderr,"Error reported by Cudd_CheckKeys\n");
  	return(0);
      }
  #endif
  
      if (option->autoDyn & 1) {
  	Cudd_AutodynEnable(dd,CUDD_REORDER_SAME);
      }
      if (option->autoDyn & 2) {
  	Cudd_AutodynEnableZdd(dd,CUDD_REORDER_SAME);
      }
  
      /* Convert the ZDDs back to BDDs and check identity. */
      for (i = 0; i < nz; i++) {
  	DdNode *checkBdd;
  	checkBdd = Cudd_zddPortToBdd(dd,zdd[i]);
  	if (checkBdd) {
  	    Cudd_Ref(checkBdd);
  	    if (option->node == NULL) {
  		if (!st_lookup(net->hash,net->outputs[i],&node)) {
  		    return(0);
  		}
  	    } else {
  		if (!st_lookup(net->hash,option->node,&node)) {
  		    return(0);
  		}
  	    }
  	    if (checkBdd != node->dd) {
  		(void) fprintf(stdout,"Equivalence failed at node %s",
  			       node->name);
  		result = Cudd_PrintDebug(dd,checkBdd,Cudd_ReadZddSize(dd),pr);
  		if (result == 0) return(0);
  	    }
  	    Cudd_RecursiveDeref(dd,checkBdd);
  	} else {
  	    (void) printf("Conversion to BDD failed.\n");
  	}
      }
  
  #ifdef DD_DEBUG
      result = Cudd_CheckKeys(dd);
      if (result != 0) {
  	(void) fprintf(stderr,"Error reported by Cudd_CheckKeys\n");
  	return(0);
      }
  #endif
  
      /* Play with the ZDDs a little. */
      if (nz > 2) {
  	DdNode *f;
  	DdNode *g1, *g2, *g;
  	f = Cudd_zddIte(dd,zdd[0],zdd[1],zdd[2]);
  	if (f == NULL) return(0);
  	cuddRef(f);
  	g1 = Cudd_zddIntersect(dd,zdd[0],zdd[1]);
  	if (g1 == NULL) {
  	    Cudd_RecursiveDerefZdd(dd,f);
  	    return(0);
  	}
  	cuddRef(g1);
  	g2 = Cudd_zddDiff(dd,zdd[2],zdd[0]);
  	if (g2 == NULL) {
  	    Cudd_RecursiveDerefZdd(dd,f);
  	    Cudd_RecursiveDerefZdd(dd,g1);
  	    return(0);
  	}
  	cuddRef(g2);
  	g = Cudd_zddUnion(dd,g1,g2);
  	if (g == NULL) {
  	    Cudd_RecursiveDerefZdd(dd,f);
  	    Cudd_RecursiveDerefZdd(dd,g1);
  	    Cudd_RecursiveDerefZdd(dd,g2);
  	    return(0);
  	}
  	cuddRef(g);
  	Cudd_RecursiveDerefZdd(dd,g1);
  	Cudd_RecursiveDerefZdd(dd,g2);
  	if (g != f) {
  	    (void) fprintf(stderr,"f != g!\n");
  	}
  	Cudd_RecursiveDerefZdd(dd,g);
  	Cudd_RecursiveDerefZdd(dd,f);
      }
  
  #ifdef DD_DEBUG
      result = Cudd_CheckKeys(dd);
      if (result != 0) {
  	(void) fprintf(stderr,"Error reported by Cudd_CheckKeys\n");
  	return(0);
      }
  #endif
  
      /* Perform ZDD reordering. */
      result = reorderZdd(net,dd,option);
      if (result == 0) return(0);
  
      /* Print final ZDD order. */
      nvars = Cudd_ReadZddSize(dd);
      names = ALLOC(char *, nvars);
      if (names == NULL) return(0);
      for (i = 0; i < nvars; i++) {
  	names[i] = NULL;
      }
      if (option->reordering != CUDD_REORDER_NONE) {
  	for (i = 0; i < net->npis; i++) {
  	    if (!st_lookup(net->hash,net->inputs[i],&node)) {
  		FREE(names);
  		return(0);
  	    }
  	    level = Cudd_ReadPermZdd(dd,node->var);
  	    names[level] = node->name;
  	}
  	for (i = 0; i < net->nlatches; i++) {
  	    if (!st_lookup(net->hash,net->latches[i][1],&node)) {
  		FREE(names);
  		return(0);
  	    }
  	    level = Cudd_ReadPermZdd(dd,node->var);
  	    names[level] = node->name;
  	}
  	(void) printf("New order\n");
  	for (i = 0, j = 0; i < nvars; i++) {
  	    if (names[i] == NULL) continue;
  	    if((j%8 == 0)&&j) (void) printf("\n");
  	    (void) printf("%s ",names[i]);
  	    j++;
  	}
  	(void) printf("\n");
      }
      FREE(names);
  
      /* Dispose of ZDDs. */
      for (i = 0; i < nz; i++) {
  	Cudd_RecursiveDerefZdd(dd,zdd[i]);
      }
      FREE(zdd);
      return(1);
  
  } /* end of Ntr_testZDD */
  
  
  /**Function********************************************************************
  
    Synopsis    [Builds ZDD covers.]
  
    Description []
  
    SideEffects [Creates ZDD variables in the manager.]
  
    SeeAlso     []
  
  ******************************************************************************/
  int
  Ntr_testISOP(
    DdManager * dd,
    BnetNetwork * net,
    NtrOptions * option)
  {
      DdNode **zdd;		/* array of converted outputs */
      DdNode *bdd;		/* return value of Cudd_zddIsop */
      int nz;			/* actual number of ZDDs */
      int result;
      int i;
      BnetNode *node;		/* auxiliary pointer to network node */
      int pr = option->verb;
  
      /* Build an array of ZDDs for the output functions or the specified
      ** node. */
      Cudd_zddRealignEnable(dd);
      Cudd_AutodynDisableZdd(dd);
      zdd = ALLOC(DdNode *,net->noutputs);
      result = Cudd_zddVarsFromBddVars(dd,2);
      if (result == 0) return(0);
      if (option->node == NULL) {
  	nz = net->noutputs;
  	for (i = 0; i < nz; i++) {
  	    if (!st_lookup(net->hash,net->outputs[i],&node)) {
  		return(0);
  	    }
  	    bdd = Cudd_zddIsop(dd, node->dd, node->dd, &zdd[i]);
  	    if (bdd != node->dd) return(0);
  	    Cudd_Ref(bdd);
  	    Cudd_RecursiveDeref(dd,bdd);
  	    if (zdd[i]) {
  		Cudd_Ref(zdd[i]);
  		(void) printf("%s", node->name);
  		result = Cudd_zddPrintDebug(dd,zdd[i],Cudd_ReadZddSize(dd),pr);
  		if (result == 0) return(0);
  		if (option->printcover) {
  		    int *path;
  		    DdGen *gen;
  		    char *str = ALLOC(char,Cudd_ReadSize(dd)+1);
  		    if (str == NULL) return(0);
  		    (void) printf("Testing iterator on ZDD paths:\n");
  		    Cudd_zddForeachPath(dd,zdd[i],gen,path) {
  			str = Cudd_zddCoverPathToString(dd,path,str);
  			(void) printf("%s 1\n", str);
  		    }
  		    (void) printf("\n");
  		    FREE(str);
  		    result = Cudd_zddPrintCover(dd,zdd[i]);
  
  		    if (result == 0) return(0);
  		}
  	    } else {
  		(void) printf("Conversion to ISOP failed.\n");
  		return(0);
  	    }
  	}
      } else {
  	nz = 1;
  	if (!st_lookup(net->hash,option->node,&node)) {
  	    return(0);
  	}
  	bdd = Cudd_zddIsop(dd, node->dd, node->dd, &zdd[0]);
  	if (bdd != node->dd) return(0);
  	Cudd_Ref(bdd);
  	Cudd_RecursiveDeref(dd,bdd);
  	if (zdd[0]) {
  	    Cudd_Ref(zdd[0]);
  	    (void) printf("%s", node->name);
  	    result = Cudd_zddPrintDebug(dd,zdd[0],Cudd_ReadZddSize(dd),pr);
  	    if (result == 0) return(0);
  	    if (option->printcover) {
  		int *path;
  		DdGen *gen;
  		char *str = ALLOC(char,Cudd_ReadSize(dd)+1);
  		if (str == NULL) return(0);
  		(void) printf("Testing iterator on ZDD paths:\n");
  		Cudd_zddForeachPath(dd,zdd[0],gen,path) {
  		    str = Cudd_zddCoverPathToString(dd,path,str);
  		    (void) printf("%s 1\n", str);
  		}
  		(void) printf("\n");
  		FREE(str);
  
  		result = Cudd_zddPrintCover(dd,zdd[0]);
  		if (result == 0) return(0);
  	    }
  	} else {
  	    (void) printf("Conversion to ISOP failed.\n");
  	    return(0);
  	}
      }
      if (option->autoDyn) {
  	Cudd_AutodynEnableZdd(dd,CUDD_REORDER_SAME);
      }
  
      /* Perform ZDD reordering. */
      result = reorderZdd(net,dd,option);
      if (result == 0) return(0);
  
      /* Dispose of ZDDs. */
      for (i = 0; i < nz; i++) {
  	Cudd_RecursiveDerefZdd(dd,zdd[i]);
      }
      FREE(zdd);
  
      return(1);
  
  } /* end of Ntr_testISOP */
  
  
  /*---------------------------------------------------------------------------*/
  /* Definition of internal functions                                          */
  /*---------------------------------------------------------------------------*/
  
  /*---------------------------------------------------------------------------*/
  /* Definition of static functions                                            */
  /*---------------------------------------------------------------------------*/
  
  
  /**Function********************************************************************
  
    Synopsis    [Applies reordering to the ZDDs.]
  
    Description [Explicitly applies reordering to the ZDDs. Returns 1 if
    successful; 0 otherwise.]
  
    SideEffects [None]
  
    SeeAlso     []
  
  *****************************************************************************/
  static int
  reorderZdd(
    BnetNetwork * net,
    DdManager * dd /* DD Manager */,
    NtrOptions * option)
  {
      int result;			/* return value from functions */
  
      /* Perform the final reordering. */
      if (option->reordering != CUDD_REORDER_NONE) {
  	(void) printf("Number of inputs = %d\n",net->ninputs);
  
  	dd->siftMaxVar = 1000000; 
  	result = Cudd_zddReduceHeap(dd,option->reordering,1);
  	if (result == 0) return(0);
  
  	/* Print symmetry stats if pertinent */
  	if (option->reordering == CUDD_REORDER_SYMM_SIFT ||
  	    option->reordering == CUDD_REORDER_SYMM_SIFT_CONV)
  	    Cudd_zddSymmProfile(dd, 0, dd->sizeZ - 1);
      }
  
      return(1);
  
  } /* end of reorderZdd */
  
  