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/*
* *********************************************************************
* * Copyright (C) 1988, 1990 Stanford University. *
* * Permission to use, copy, modify, and distribute this *
* * software and its documentation for any purpose and without *
* * fee is hereby granted, provided that the above copyright *
* * notice appear in all copies. Stanford University *
* * makes no representations about the suitability of this *
* * software for any purpose. It is provided "as is" without *
* * express or implied warranty. Export of this software outside *
* * of the United States of America may require an export license. *
* *********************************************************************
*/
#include <stdio.h>
#include "defs.h"
#include "net.h"
#include "globals.h"
#include "net_macros.h"
public nptr VDD_node; /* power supply nodes */
public nptr GND_node;
public lptr on_trans; /* always on transistors */
public int nnodes; /* number of actual nodes */
public int naliases; /* number of aliased nodes */
public int ntrans[ NTTYPES ]; /* number of txtors indexed by type */
public lptr freeLinks = NULL; /* free list of Tlist structs */
public tptr freeTrans = NULL; /* free list of Transistor structs */
public nptr freeNodes = NULL; /* free list of Node structs */
public tptr tcap = NULL; /* list of capacitor-transistors */
public
#define MIN_CAP 0.0005 /* minimum node capacitance (in pf) */
private void init_counts()
{
register int i;
for( i = 0; i < NTTYPES; i++ )
ntrans[i] = 0;
nnodes = naliases = 0;
}
public int rd_network( simfile )
FILE *simfile;
{
static int firstcall = 1;
char line[ 200 ];
if( firstcall )
{
init_hash();
init_counts();
init_listTbl();
VDD_node = GetNode( "Vdd" );
VDD_node->npot = HIGH;
VDD_node->nflags |= (INPUT | POWER_RAIL);
VDD_node->head.inp = 1;
VDD_node->head.val = HIGH;
VDD_node->head.punt = 0;
VDD_node->head.time = 0;
VDD_node->head.t.r.rtime = VDD_node->head.t.r.delay = 0;
VDD_node->head.next = last_hist;
VDD_node->curr = &(VDD_node->head);
GND_node = GetNode( "Gnd" );
GND_node->npot = LOW;
GND_node->nflags |= (INPUT | POWER_RAIL);
GND_node->head.inp = 1;
GND_node->head.val = LOW;
GND_node->head.punt = 0;
GND_node->head.time = 0;
GND_node->head.t.r.rtime = GND_node->head.t.r.delay = 0;
GND_node->head.next = last_hist;
GND_node->curr = &(GND_node->head);
NEW_TRANS( tcap );
tcap->scache.t = tcap->dcache.t = tcap;
tcap->x.pos = 0;
firstcall = 0;
}
if( fgetline( line, 200, simfile ) == NULL )
{
lprintf( stderr, "can't read input file\n" );
exit( 1 );
}
if( rd_netfile( simfile, line ) == FALSE )
exit( 1 );
}
public void pTotalNodes()
{
lprintf( stdout, "%d nodes", nnodes );
if( naliases != 0 )
lprintf( stdout, ", %d aliases", naliases );
lprintf( stdout, "; " );
}
public void pTotalTxtors()
{
int i;
lprintf( stdout, "transistors:" );
for( i = 0; i < NTTYPES; i++ )
if( ntrans[i] != 0 )
lprintf( stdout, " %s=%d", ttype[i], ntrans[i] );
if( tcap->x.pos != 0 )
lprintf( stdout, " shorted=%d", tcap->x.pos );
lprintf( stdout, "\n" );
}
public void ConnectNetwork()
{
#ifdef notdef
nptr ndlist;
pTotalNodes();
ndlist = ( isBinFile ) ? bin_connect_txtors() : connect_txtors();
pTotalTxtors();
make_parallel( ndlist, (long)(stack_txtors ? 0 : VISITED) );
pParallelTxtors();
if( stack_txtors )
{
make_stacks( ndlist );
pStackedTxtors();
}
#endif
}
#define SIZE2LAMBDA( X ) ( (double) (X) / LAMBDACM )
#define CAP_LIM ( 2 * MIN_CAP )
#define CAP2FF( C ) ( (int) (((C) + (MIN_CAP / 2)) * 1000.0) )
public void wr_sim( fout )
FILE *fout;
{
register tptr t;
register nptr n;
tptr tlist;
nptr nlist;
char capfmt[50];
if( use_GND and GND_node->nname[0] == 'G' ) /* may be a number */
(void) strcpy( GND_node->nname, "GND" );
nlist = GetNodeList();
GetInetParms( &tlist, &LAMBDACM );
for( t = tlist; t != NULL; t = t->scache.t )
{
int type;
type = BASETYPE( t->ttype );
if( type == RESIST )
{
(void) fprintf( fout, "r %s %s %.2f\n",
pnode( t->source ), pnode( t->drain ), t->r->rstatic );
}
else
{
(void) fprintf( fout, "%c %s %s %s %.2f %.2f", ttype[type][0],
pnode( t->gate ), pnode( t->source ), pnode( t->drain ),
SIZE2LAMBDA( t->r->length ), SIZE2LAMBDA( t->r->width ) );
if( t->tlink != t )
(void) fprintf( fout, " %ld %ld", t->x, t->y );
(void) fputc( '\n', fout );
}
t->gate->nflags |= VISITED;
t->source->nflags |= VISITED;
t->drain->nflags |= VISITED;
}
if( do_sim_cap and two_term_caps )
{
(void) sprintf( capfmt, "C %%s %s %%d\n", GND_node->nname );
for( n = nlist; n != NULL; n = n->n.next )
{
if( not (n->nflags & VISITED) or n->ncap >= CAP_LIM )
(void) fprintf( fout, capfmt, pnode( n ), CAP2FF( n->ncap ) );
}
}
else if( do_sim_cap )
{
for( n = nlist; n != NULL; n = n->n.next )
{
if( not (n->nflags & VISITED) or n->ncap >= CAP_LIM )
(void) fprintf( fout, "C %s %.3f\n", pnode( n ), n->ncap );
}
}
for( n = nlist; n != NULL; n = n->n.next )
{
if( n->nflags & ALIAS )
(void) fprintf( fout, "= %s %s\n", pnode( n ), pnode( n->nlink ));
}
if( do_delays )
{
for( n = nlist; n != NULL; n = n->n.next )
{
if( n->nflags & USERDELAY )
(void) fprintf( fout, "D %s %.2f %.2f\n", pnode( n ),
d2ns( n->tplh ), d2ns( n->tphl ) );
}
}
if( do_thresholds )
{
float vhigh = HIGHTHRESH, vlow = LOWTHRESH;
for( n = nlist; n != NULL; n = n->n.next )
{
if( n->vlow != vlow or n->vhigh != vhigh )
(void) fprintf( fout, "t %s %g %g\n", pnode( n ),
n->vlow, n->vhigh );
}
}
}
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