dctran.c

ngspice又一个电子CAD仿真软件代码.功能更全

        /* projected analog time, process them */
        while((g_mif_info.circuit.evt_step = EVTnext_time(ckt))
               <= (ckt->CKTtime + ckt->CKTdelta)) {

            /* Initialize temp analog bkpt to infinity */
            g_mif_info.breakpoint.current = 1e30;

            /* Pull items off queue and process them */
            EVTdequeue(ckt, g_mif_info.circuit.evt_step);
            EVTiter(ckt);

            /* If any instances have forced an earlier */
            /* next analog time, cut the delta */
            if(*(ckt->CKTbreaks) < g_mif_info.breakpoint.current)
                if(*(ckt->CKTbreaks) > (ckt->CKTtime + ckt->CKTminBreak))
                    g_mif_info.breakpoint.current = *(ckt->CKTbreaks);
            if(g_mif_info.breakpoint.current < (ckt->CKTtime + ckt->CKTdelta)) {
                /* Breakpoint must be > last accepted timepoint */
                /* and >= current event time */
                if(g_mif_info.breakpoint.current > (ckt->CKTtime + ckt->CKTminBreak)
                   && (g_mif_info.breakpoint.current >= g_mif_info.circuit.evt_step)) {
                    ckt->CKTsaveDelta = ckt->CKTdelta;
                    ckt->CKTdelta = g_mif_info.breakpoint.current - ckt->CKTtime;
                    g_mif_info.breakpoint.last = ckt->CKTtime + ckt->CKTdelta;
                }
            }

        } /* end while next event time <= next analog time */
    } /* end if there are event instances */

/* gtri - end - wbk - Do event solution */
#endif
    for(i=5;i>=0;i--) {
        ckt->CKTdeltaOld[i+1]=ckt->CKTdeltaOld[i];
    }
    ckt->CKTdeltaOld[0]=ckt->CKTdelta;

    temp = ckt->CKTstates[ckt->CKTmaxOrder+1];
    for(i=ckt->CKTmaxOrder;i>=0;i--) {
        ckt->CKTstates[i+1] = ckt->CKTstates[i];
    }
    ckt->CKTstates[0] = temp;

/* 600 */
    while (1) {
#ifdef CLUSTER
      redostep = 1;
#endif
#ifdef XSPICE
/* gtri - add - wbk - 4/17/91 - Fix Berkeley bug */
/* This is needed here to allow CAPask to output currents */
/* during Transient analysis.  A grep for CKTcurrentAnalysis */
/* indicates that it should not hurt anything else ... */

        ckt->CKTcurrentAnalysis = DOING_TRAN;

/* gtri - end - wbk - 4/17/91 - Fix Berkeley bug */
#endif
        olddelta=ckt->CKTdelta;
        /* time abort? */
        ckt->CKTtime += ckt->CKTdelta;
#ifdef CLUSTER
	CLUinput(ckt);
#endif	
        ckt->CKTdeltaOld[0]=ckt->CKTdelta;
        NIcomCof(ckt);
#ifdef PREDICTOR
        error = NIpred(ckt);
#endif /* PREDICTOR */
        save_mode = ckt->CKTmode;
        save_order = ckt->CKTorder;
#ifdef XSPICE
/* gtri - begin - wbk - Add Breakpoint stuff */

        /* Initialize temporary breakpoint to infinity */
        g_mif_info.breakpoint.current = 1.0e30;

/* gtri - end - wbk - Add Breakpoint stuff */


/* gtri - begin - wbk - add convergence problem reporting flags */
        /* delta is forced to equal delmin on last attempt near line 650 */
        if(ckt->CKTdelta <= ckt->CKTdelmin)
	  ckt->enh->conv_debug.last_NIiter_call = MIF_TRUE;
        else
	  ckt->enh->conv_debug.last_NIiter_call = MIF_FALSE;
/* gtri - begin - wbk - add convergence problem reporting flags */
	


/* gtri - begin - wbk - Call all hybrids */

/* gtri - begin - wbk - Set evt_step */

        if(ckt->evt->counts.num_insts > 0) {
	  g_mif_info.circuit.evt_step = ckt->CKTtime;
        }
/* gtri - end - wbk - Set evt_step */
#endif
	
        converged = NIiter(ckt,ckt->CKTtranMaxIter);
	
#ifdef XSPICE
        if(ckt->evt->counts.num_insts > 0) 
		{
            g_mif_info.circuit.evt_step = ckt->CKTtime;
            EVTcall_hybrids(ckt);
        }		
/* gtri - end - wbk - Call all hybrids */

#endif	
        ckt->CKTstat->STATtimePts ++;
        ckt->CKTmode = (ckt->CKTmode&MODEUIC)|MODETRAN | MODEINITPRED;
        if(firsttime) {
            for(i=0;i<ckt->CKTnumStates;i++) {
                *(ckt->CKTstate2+i) = *(ckt->CKTstate1+i);
                *(ckt->CKTstate3+i) = *(ckt->CKTstate1+i);
            }
        }
		/* txl, cpl addition */
		if (converged == 1111) {
            return(converged);
		}

        if(converged != 0) {
#ifndef CLUSTER	
            ckt->CKTtime = ckt->CKTtime -ckt->CKTdelta;
            ckt->CKTstat->STATrejected ++;
#endif	    
            ckt->CKTdelta = ckt->CKTdelta/8;
#ifdef STEPDEBUG
           (void)printf("delta cut to %g for non-convergance\n",ckt->CKTdelta);
            fflush(stdout);
#endif
            if(firsttime) {
                ckt->CKTmode = (ckt->CKTmode&MODEUIC)|MODETRAN | MODEINITTRAN;
            }
            ckt->CKTorder = 1;

#ifdef XSPICE
/* gtri - begin - wbk - Add Breakpoint stuff */

        /* Force backup if temporary breakpoint is < current time */
        } else if(g_mif_info.breakpoint.current < ckt->CKTtime) {
            ckt->CKTsaveDelta = ckt->CKTdelta;
            ckt->CKTtime -= ckt->CKTdelta;
            ckt->CKTdelta = g_mif_info.breakpoint.current - ckt->CKTtime;
            g_mif_info.breakpoint.last = ckt->CKTtime + ckt->CKTdelta;
            if(firsttime) {
                ckt->CKTmode = (ckt->CKTmode&MODEUIC)|MODETRAN | MODEINITTRAN;
            }
            ckt->CKTorder = 1;

/* gtri - end - wbk - Add Breakpoint stuff */
#endif

        } else {
            if (firsttime) {
#ifdef WANT_SENSE2
                if(ckt->CKTsenInfo && (ckt->CKTsenInfo->SENmode & TRANSEN)){
                    save1 = ckt->CKTmode;
                    save2 = ckt->CKTorder;
                    ckt->CKTmode = save_mode;
                    ckt->CKTorder = save_order;
                    if(error = CKTsenDCtran(ckt)) return(error);
                    ckt->CKTmode = save1;
                    ckt->CKTorder = save2;
                }
#endif
                firsttime =0;
#ifndef CLUSTER		
                goto nextTime;  /* no check on
                                 * first time point
                                 */
#else
		redostep = 0;
		goto chkStep;
#endif				 
            }
            new = ckt->CKTdelta;
            error = CKTtrunc(ckt,&new);
            if(error) {
                ckt->CKTcurrentAnalysis = DOING_TRAN;
                ckt->CKTstat->STATtranTime += 
                        (*(SPfrontEnd->IFseconds))()-startTime;
                ckt->CKTstat->STATtranIter += 
                        ckt->CKTstat->STATnumIter - startIters;
                ckt->CKTstat->STATtranDecompTime += ckt->CKTstat->STATdecompTime
                        - startdTime;
                ckt->CKTstat->STATtranSolveTime += ckt->CKTstat->STATsolveTime
                        - startsTime;
		ckt->CKTstat->STATtranLoadTime += ckt->CKTstat->STATloadTime
			- startlTime;
		ckt->CKTstat->STATtranCombTime += ckt->CKTstat->STATcombineTime
			- startcTime;
		ckt->CKTstat->STATtranSyncTime += ckt->CKTstat->STATsyncTime
			- startkTime;
                return(error);
            }
            if(new>.9 * ckt->CKTdelta) {
                if(ckt->CKTorder == 1) {
                    new = ckt->CKTdelta;
                    ckt->CKTorder = 2;
                    error = CKTtrunc(ckt,&new);
                    if(error) {
                        ckt->CKTcurrentAnalysis = DOING_TRAN;
                        ckt->CKTstat->STATtranTime += 
                                (*(SPfrontEnd->IFseconds))()-startTime;
                        ckt->CKTstat->STATtranIter += 
                                ckt->CKTstat->STATnumIter - startIters;
                        ckt->CKTstat->STATtranDecompTime += 
                                ckt->CKTstat->STATdecompTime - startdTime;
                        ckt->CKTstat->STATtranSolveTime += 
                                ckt->CKTstat->STATsolveTime - startsTime;
			ckt->CKTstat->STATtranLoadTime +=
				ckt->CKTstat->STATloadTime - startlTime;
			ckt->CKTstat->STATtranCombTime +=
				ckt->CKTstat->STATcombineTime - startcTime;
			ckt->CKTstat->STATtranSyncTime +=
				ckt->CKTstat->STATsyncTime - startkTime;
                        return(error);
                    }
                    if(new <= 1.05 * ckt->CKTdelta) {
                        ckt->CKTorder = 1;
                    }
                }
                /* time point OK  - 630*/
                ckt->CKTdelta = new;
#ifdef STEPDEBUG
               (void)printf(
                  "delta set to truncation error result: %g. Point accepted\n",
                  ckt->CKTdelta);
                fflush(stdout);
#endif
#ifdef WANT_SENSE2
                if(ckt->CKTsenInfo && (ckt->CKTsenInfo->SENmode & TRANSEN)){
                    save1 = ckt->CKTmode;
                    save2 = ckt->CKTorder;
                    ckt->CKTmode = save_mode;
                    ckt->CKTorder = save_order;
                    if(error = CKTsenDCtran(ckt)) return(error);
                    ckt->CKTmode = save1;
                    ckt->CKTorder = save2;
                }
#endif
#ifndef CLUSTER
                /* go to 650 - trapezoidal */		
                goto nextTime;
#else
		redostep = 0;
		goto chkStep;
#endif		
            } else {
#ifndef CLUSTER	    
                ckt->CKTtime = ckt->CKTtime -ckt->CKTdelta;
                ckt->CKTstat->STATrejected ++;
#endif		
                ckt->CKTdelta = new;
#ifdef STEPDEBUG
                (void)printf(
                    "delta set to truncation error result:point rejected\n");
#endif
            }
        }
#ifdef PARALLEL_ARCH
	DGOP_( &type, &(ckt->CKTdelta), &length, "min" );
#endif /* PARALLEL_ARCH */

        if (ckt->CKTdelta <= ckt->CKTdelmin) {
            if (olddelta > ckt->CKTdelmin) {
                ckt->CKTdelta = ckt->CKTdelmin;
#ifdef STEPDEBUG
                (void)printf("delta at delmin\n");
#endif
            } else {
                ckt->CKTcurrentAnalysis = DOING_TRAN;
                ckt->CKTstat->STATtranTime += 
                        (*(SPfrontEnd->IFseconds))()-startTime;
                ckt->CKTstat->STATtranIter += 
                        ckt->CKTstat->STATnumIter - startIters;
                ckt->CKTstat->STATtranDecompTime += 
                        ckt->CKTstat->STATdecompTime - startdTime;
                ckt->CKTstat->STATtranSolveTime += 
                        ckt->CKTstat->STATsolveTime - startsTime;
		ckt->CKTstat->STATtranLoadTime +=
			ckt->CKTstat->STATloadTime - startlTime;
		ckt->CKTstat->STATtranCombTime +=
			ckt->CKTstat->STATcombineTime - startcTime;
		ckt->CKTstat->STATtranSyncTime +=
			ckt->CKTstat->STATsyncTime - startkTime;
		errMsg = CKTtrouble((void *) ckt, "Timestep too small");
                return(E_TIMESTEP);
            }
        }
#ifdef XSPICE
/* gtri - begin - wbk - Do event backup */

        if(ckt->evt->counts.num_insts > 0)
            EVTbackup(ckt, ckt->CKTtime + ckt->CKTdelta);

/* gtri - end - wbk - Do event backup */
#endif	
#ifdef CLUSTER
    chkStep:
	if(CLUsync(ckt->CKTtime,&ckt->CKTdelta,redostep)){
	  goto nextTime;
	} else {
	  ckt->CKTtime -= olddelta;
	  ckt->CKTstat->STATrejected ++;
	}
#endif	
    }
    /* NOTREACHED */
}