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Alexandre Duret-Lutz
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buddy/src/kernel.h
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buddy/src/kernel.h
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/*========================================================================
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Copyright (C) 1996-2002 by Jorn Lind-Nielsen
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All rights reserved
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Permission is hereby granted, without written agreement and without
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license or royalty fees, to use, reproduce, prepare derivative
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works, distribute, and display this software and its documentation
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for any purpose, provided that (1) the above copyright notice and
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the following two paragraphs appear in all copies of the source code
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and (2) redistributions, including without limitation binaries,
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reproduce these notices in the supporting documentation. Substantial
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modifications to this software may be copyrighted by their authors
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and need not follow the licensing terms described here, provided
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that the new terms are clearly indicated in all files where they apply.
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IN NO EVENT SHALL JORN LIND-NIELSEN, OR DISTRIBUTORS OF THIS
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SOFTWARE BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL,
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INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS
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SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE AUTHORS OR ANY OF THE
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ABOVE PARTIES HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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JORN LIND-NIELSEN SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO
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OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
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MODIFICATIONS.
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========================================================================*/
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/*************************************************************************
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$Header: /Volumes/CVS/repository/spot/spot/buddy/src/kernel.h,v 1.1 2003/05/05 10:57:57 aduret Exp $
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FILE: kernel.h
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DESCR: Kernel specific definitions for BDD package
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AUTH: Jorn Lind
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DATE: (C) june 1997
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*************************************************************************/
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#ifndef _KERNEL_H
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#define _KERNEL_H
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/*=== Includes =========================================================*/
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#include <limits.h>
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#include <setjmp.h>
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#include "bdd.h"
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/*=== SANITY CHECKS ====================================================*/
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/* Make sure we use at least 32 bit integers */
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#if (INT_MAX < 0x7FFFFFFF)
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#error The compiler does not support 4 byte integers!
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#endif
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/* Sanity check argument and return eventual error code */
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#define CHECK(r)\
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if (!bddrunning) return bdd_error(BDD_RUNNING);\
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else if ((r) < 0 || (r) >= bddnodesize) return bdd_error(BDD_ILLBDD);\
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else if (r >= 2 && LOW(r) == -1) return bdd_error(BDD_ILLBDD)\
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/* Sanity check argument and return eventually the argument 'a' */
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#define CHECKa(r,a)\
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if (!bddrunning) { bdd_error(BDD_RUNNING); return (a); }\
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else if ((r) < 0 || (r) >= bddnodesize)\
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{ bdd_error(BDD_ILLBDD); return (a); }\
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else if (r >= 2 && LOW(r) == -1)\
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{ bdd_error(BDD_ILLBDD); return (a); }
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#define CHECKn(r)\
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if (!bddrunning) { bdd_error(BDD_RUNNING); return; }\
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else if ((r) < 0 || (r) >= bddnodesize)\
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{ bdd_error(BDD_ILLBDD); return; }\
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else if (r >= 2 && LOW(r) == -1)\
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{ bdd_error(BDD_ILLBDD); return; }
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/*=== SEMI-INTERNAL TYPES ==============================================*/
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typedef struct s_BddNode /* Node table entry */
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{
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unsigned int refcou : 10;
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unsigned int level : 22;
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int low;
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int high;
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int hash;
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int next;
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} BddNode;
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/*=== KERNEL VARIABLES =================================================*/
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#ifdef CPLUSPLUS
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extern "C" {
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#endif
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extern int bddrunning; /* Flag - package initialized */
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extern int bdderrorcond; /* Some error condition was met */
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extern int bddnodesize; /* Number of allocated nodes */
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extern int bddmaxnodesize; /* Maximum allowed number of nodes */
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extern int bddmaxnodeincrease; /* Max. # of nodes used to inc. table */
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extern BddNode* bddnodes; /* All of the bdd nodes */
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extern int bddvarnum; /* Number of defined BDD variables */
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extern int* bddrefstack; /* Internal node reference stack */
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extern int* bddrefstacktop; /* Internal node reference stack top */
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extern int* bddvar2level;
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extern int* bddlevel2var;
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extern jmp_buf bddexception;
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extern int bddreorderdisabled;
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extern int bddresized;
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extern bddCacheStat bddcachestats;
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#ifdef CPLUSPLUS
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}
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#endif
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/*=== KERNEL DEFINITIONS ===============================================*/
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#define VERSION 22
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#define MAXVAR 0x1FFFFF
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#define MAXREF 0x3FF
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/* Reference counting */
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#define DECREF(n) if (bddnodes[n].refcou!=MAXREF && bddnodes[n].refcou>0) bddnodes[n].refcou--
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#define INCREF(n) if (bddnodes[n].refcou<MAXREF) bddnodes[n].refcou++
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#define DECREFp(n) if (n->refcou!=MAXREF && n->refcou>0) n->refcou--
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#define INCREFp(n) if (n->refcou<MAXREF) n->refcou++
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#define HASREF(n) (bddnodes[n].refcou > 0)
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/* Marking BDD nodes */
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#define MARKON 0x200000 /* Bit used to mark a node (1) */
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#define MARKOFF 0x1FFFFF /* - unmark */
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#define MARKHIDE 0x1FFFFF
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#define SETMARK(n) (bddnodes[n].level |= MARKON)
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#define UNMARK(n) (bddnodes[n].level &= MARKOFF)
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#define MARKED(n) (bddnodes[n].level & MARKON)
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#define SETMARKp(p) (node->level |= MARKON)
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#define UNMARKp(p) (node->level &= MARKOFF)
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#define MARKEDp(p) (node->level & MARKON)
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/* Hashfunctions */
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#define PAIR(a,b) ((unsigned int)((((unsigned int)a)+((unsigned int)b))*(((unsigned int)a)+((unsigned int)b)+((unsigned int)1))/((unsigned int)2)+((unsigned int)a)))
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#define TRIPLE(a,b,c) ((unsigned int)(PAIR((unsigned int)c,PAIR(a,b))))
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/* Inspection of BDD nodes */
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#define ISCONST(a) ((a) < 2)
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#define ISNONCONST(a) ((a) >= 2)
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#define ISONE(a) ((a) == 1)
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#define ISZERO(a) ((a) == 0)
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#define LEVEL(a) (bddnodes[a].level)
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#define LOW(a) (bddnodes[a].low)
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#define HIGH(a) (bddnodes[a].high)
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#define LEVELp(p) ((p)->level)
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#define LOWp(p) ((p)->low)
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#define HIGHp(p) ((p)->high)
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/* Stacking for garbage collector */
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#define INITREF bddrefstacktop = bddrefstack
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#define PUSHREF(a) *(bddrefstacktop++) = (a)
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#define READREF(a) *(bddrefstacktop-(a))
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#define POPREF(a) bddrefstacktop -= (a)
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#define BDDONE 1
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#define BDDZERO 0
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#ifndef CLOCKS_PER_SEC
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#define CLOCKS_PER_SEC DEFAULT_CLOCK
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#endif
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#define DEFAULTMAXNODEINC 50000
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#define MAX(a,b) ((a) > (b) ? (a) : (b))
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#define NEW(t,n) ( (t*)malloc(sizeof(t)*(n)) )
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/*=== KERNEL PROTOTYPES ================================================*/
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#ifdef CPLUSPLUS
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extern "C" {
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#endif
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extern int bdd_error(int);
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extern int bdd_makenode(unsigned int, int, int);
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extern int bdd_noderesize(int);
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extern void bdd_checkreorder(void);
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extern void bdd_mark(int);
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extern void bdd_mark_upto(int, int);
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extern void bdd_markcount(int, int*);
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extern void bdd_unmark(int);
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extern void bdd_unmark_upto(int, int);
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extern void bdd_register_pair(bddPair*);
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extern int *fdddec2bin(int, int);
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extern int bdd_operator_init(int);
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extern void bdd_operator_done(void);
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extern void bdd_operator_varresize(void);
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extern void bdd_operator_reset(void);
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extern void bdd_pairs_init(void);
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extern void bdd_pairs_done(void);
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extern int bdd_pairs_resize(int,int);
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extern void bdd_pairs_vardown(int);
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extern void bdd_fdd_init(void);
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extern void bdd_fdd_done(void);
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extern void bdd_reorder_init(void);
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extern void bdd_reorder_done(void);
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extern int bdd_reorder_ready(void);
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extern void bdd_reorder_auto(void);
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extern int bdd_reorder_vardown(int);
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extern int bdd_reorder_varup(int);
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extern void bdd_cpp_init(void);
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#ifdef CPLUSPLUS
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}
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#endif
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#endif /* _KERNEL_H */
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/* EOF */
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