extern void improve_RC_circuit(lofig_list* lofig, int optim_level)
{
loins_list* loins;
locon_list* locon;
losig_list* losig;
for (loins=lofig->LOINS; loins; loins=loins->NEXT) {
for (locon=loins->LOCON; locon; locon=locon->NEXT) {
if (locon->DIRECTION==UNKNOWN) {
fprintf(stderr,"BEH: 'linkage %s' in figure '%s' isn't accepted\n",
locon->NAME,loins->INSNAME);
autexit(1);
}
if (isvdd(locon->NAME) || isvss(locon->NAME)) continue;
if (locon->DIRECTION!=IN) break;
}
if (!locon) {
fprintf(stderr,"improve_RC_circuit: no output found for '%s'\n",
loins->FIGNAME);
autexit(1);
}
losig=locon->SIG;
change_instance(loins, losig, lofig, optim_level);
}
}
extern void undefine_delay(befig_list *befig)
{
bereg_list* bereg;
bebux_list* bebux;
beaux_list* beaux;
bepor_list* bepor;
/*init*/
for (beaux=befig->BEAUX; beaux; beaux=beaux->NEXT) {
undefdelay(beaux->NAME);
}
for (bereg=befig->BEREG; bereg; bereg=bereg->NEXT) {
undefdelay(bereg->NAME);
}
for (bebux=befig->BEBUX; bebux; bebux=bebux->NEXT) {
undefdelay(bebux->NAME);
}
for (bepor=befig->BEPOR; bepor; bepor=bepor->NEXT) {
/*inputs only*/
if (isvss(bepor->NAME) || isvdd(bepor->NAME)) continue;
switch (bepor->DIRECTION) {case OUT: case TRISTATE: continue;}
undefdelay(bepor->NAME);
}
}
static void removepowers(lofig_list *f)
{
locon_list *c, *cc;
loins_list *i;
cc=NULL;
for (c=f->LOCON; c;) {
if (isvdd(c->NAME) || isvss(c->NAME)) {
if (cc) {
cc->NEXT=c->NEXT;
mbkfree(c);
c=cc->NEXT;
} else {
f->LOCON=c->NEXT;
mbkfree(c);
c=f->LOCON;
}
} else {
cc=c;
c=c->NEXT;
}
}
for (i=f->LOINS; i; i=i->NEXT) {
cc=NULL;
for (c=i->LOCON; c;) {
if (isvdd(c->NAME) || isvss(c->NAME)) {
if (cc) {
cc->NEXT=c->NEXT;
mbkfree(c);
c=cc->NEXT;
} else {
i->LOCON=c->NEXT;
mbkfree(c);
c=i->LOCON;
}
} else {
cc=c;
c=c->NEXT;
}
}
}
}
extern void final_eval_delay(befig_list *befig)
{
bereg_list *bereg;
bebus_list *bebus;
beout_list *beout;
biabl_list *biabl;
bepor_list* bepor;
float delay;
if (!befig) {
fprintf(stderr,"eval_delay: NULL pointer\n");
exit(1);
}
/*constants*/
putdelay(getablatomone(),0);
putdelay(getablatomzero(),0);
for (bepor=befig->BEPOR; bepor; bepor=bepor->NEXT) {
/*only input*/
if (bepor->DIRECTION!=IN && bepor->DIRECTION!=INOUT
&& bepor->DIRECTION!=TRANSCV) continue;
if (isvdd(bepor->NAME) || isvss(bepor->NAME)) continue;
/* T + RC */
delay=getdelaylax(bepor->NAME) + getimpedancelax(bepor->NAME)
* getcapacitance(bepor->NAME);
putdelay(bepor->NAME,delay);
}
/*separ value from condition for flip-flop to avoid cycle*/
for (bereg=befig->BEREG; bereg; bereg=bereg->NEXT) {
for (biabl=bereg->BIABL; biabl; biabl=biabl->NEXT) {
if (getptype(biabl->USER,ABL_STABLE)) { /*only flip-flop*/
search_abl(biabl->VALABL,befig);
}
}
}
for (beout=befig->BEOUT; beout; beout=beout->NEXT) {
search_abl(beout->ABL,befig);
/*do not define delay now*/
}
for (bebus=befig->BEBUS; bebus; bebus=bebus->NEXT) {
for (biabl=bebus->BIABL; biabl; biabl=biabl->NEXT) {
search_abl(biabl->CNDABL,befig);
search_abl(biabl->VALABL,befig);
/*do not define delay now*/
}
}
}
extern void average_capacitance(befig_list *befig)
{
bereg_list* bereg;
bebux_list* bebux;
beaux_list* beaux;
bepor_list* bepor;
char* name;
float capa;
/*init*/
for (beaux=befig->BEAUX; beaux; beaux=beaux->NEXT) {
name=getoppositename(beaux->NAME);
capa=getcapacitance(beaux->NAME);
capa+=getcapacitance(name);
capa=capa/2;
putcapacitance(beaux->NAME,capa);
putcapacitance(name,capa);
}
for (bereg=befig->BEREG; bereg; bereg=bereg->NEXT) {
name=getoppositename(bereg->NAME);
capa=getcapacitance(bereg->NAME);
capa+=getcapacitance(name);
capa=capa/2;
putcapacitance(bereg->NAME,capa);
putcapacitance(name,capa);
}
for (bebux=befig->BEBUX; bebux; bebux=bebux->NEXT) {
name=getoppositename(bebux->NAME);
capa=getcapacitance(bebux->NAME);
capa+=getcapacitance(name);
capa=capa/2;
putcapacitance(bebux->NAME,capa);
putcapacitance(name,capa);
}
for (bepor=befig->BEPOR; bepor; bepor=bepor->NEXT) {
/*inputs only*/
if (isvss(bepor->NAME) || isvdd(bepor->NAME)) continue;
switch (bepor->DIRECTION) {case OUT: case TRISTATE: continue;}
name=getoppositename(bepor->NAME);
capa=getcapacitance(bepor->NAME);
capa+=getcapacitance(name);
capa=capa/2;
putcapacitance(bepor->NAME,capa);
putcapacitance(name,capa);
}
}
extern void save_xsch(FILE* xsch_stream, lofig_list* lofig, ptype_list* long_path, int color_mode)
{
long color;
ptype_list* ptype, *ptype2=NULL;
float delay=0, delay_out=0;
char mes[1024];
char* signame = NULL;
locon_list* locon;
losig_list* losig;
float gradient=1;
int count;
loins_list* loins;
char *source, *dest=NULL, *last_sig;
chain_list* chain, *loinschain=NULL;
chain_list* lofigchain;
losig_list* losig_aux;
/*build gradient*/
if (long_path && color_mode==XSCH_GRADIENT) {
/*get time of last entry*/
count=1;
for (ptype=long_path; ptype->NEXT; ptype=ptype->NEXT) count++;
if (!ptype->DATA) {
fprintf(stderr,"save_xsch: compute error\n");
exit(1);
}
delay=ptype->TYPE;
gradient=delay/((float)XSCH_COLOR_MAX);
}
/*color for signals*/
for (losig=lofig->LOSIG; losig; losig=losig->NEXT) {
if (!losig->NAMECHAIN || !losig->NAMECHAIN->DATA) {
fprintf(stderr,"save_xsch: no name for signal\n");
exit(1);
}
signame=losig->NAMECHAIN->DATA;
if (isvdd(signame) || isvss(signame)) continue;
if (losig->TYPE==EXTERNAL) {
/*search external output*/
ptype=getptype(losig->USER,LOFIGCHAIN);
for (lofigchain=ptype->DATA; lofigchain; lofigchain=lofigchain->NEXT) {
locon=lofigchain->DATA;
if (locon->TYPE==EXTERNAL && locon->DIRECTION!=IN) break;
}
if (lofigchain) delay=getdelay(output_name(signame));
else delay=getdelay(signame);
}
else delay=getdelay(signame);
switch (color_mode) {
case XSCH_GRADIENT: color=gradient_color(delay,gradient); break;
case XSCH_CRITICAL_PATH: default: color=XSCH_NEUTRAL_COLOR; break;
}
flush_losig(xsch_stream, signame, color, delay, losig->TYPE);
}
/*color for instances*/
for (loins=lofig->LOINS; loins; loins=loins->NEXT) {
/*search signal output*/
for (locon=loins->LOCON; locon; locon=locon->NEXT) {
if (locon->DIRECTION==UNKNOWN) {
fprintf(stderr,"BEH: 'linkage %s' in figure '%s' isn't accepted\n",
locon->NAME,loins->INSNAME);
exit(1);
}
if (locon->DIRECTION==OUT || locon->DIRECTION==INOUT
|| locon->DIRECTION==TRISTATE || locon->DIRECTION==TRANSCV) break;
}
if (!locon) {
fprintf(stderr,"save_xsch: no output found for '%s'\n",loins->INSNAME);
exit(1);
}
losig=locon->SIG;
signame=losig->NAMECHAIN->DATA;
delay=getdelay(loins->INSNAME);
switch (color_mode) {
case XSCH_GRADIENT: color=gradient_color(delay,gradient); break;
case XSCH_CRITICAL_PATH: default:
/*is instance in critical path?*/
for (ptype=long_path; ptype; ptype=ptype->NEXT) {
if ((char*)ptype->DATA!=signame) continue;
/*if output and input signals belong to critical path, then instance belongs*/
for (locon=loins->LOCON; locon; locon=locon->NEXT) {
if (locon->DIRECTION==OUT || locon->DIRECTION==TRISTATE) continue;
losig_aux=locon->SIG;
/*is signal in critical path?*/
for (ptype2=long_path; ptype2; ptype2=ptype2->NEXT) {
if ((char*)ptype2->DATA==losig_aux->NAMECHAIN->DATA) break;
}
if (ptype2) break;
}
ptype=ptype2; /*found?*/
break;
}
/*build critical path list*/
if (ptype) loinschain=addchain(loinschain,loins);
if (ptype) color=XSCH_RED_COLOR;
else color=XSCH_NEUTRAL_COLOR;
}
flush_loins(xsch_stream, loins->INSNAME, color, delay);
}
/*color for connectors*/
for (locon=lofig->LOCON; locon; locon=locon->NEXT) {
if (isvdd(locon->NAME) || isvss(locon->NAME)) continue;
switch (locon->DIRECTION) {
case IN:
delay_out=getdelay(locon->NAME);
sprintf(mes, "%d ps",(int)delay_out);
break;
case OUT: case TRISTATE:
delay_out=getdelay(output_name(locon->NAME));
sprintf(mes, "%d ps",(int)delay_out);
break;
case INOUT: case TRANSCV:
delay=getdelay(locon->NAME);
delay_out=getdelay(output_name(locon->NAME));
sprintf(mes, "%d ps on input; %d ps on output",(int)delay,(int)delay_out);
break;
}
switch (color_mode) {
case XSCH_GRADIENT: color=gradient_color(delay_out,gradient); break;
case XSCH_CRITICAL_PATH: default:
/* seek if signal is in a long path*/
for (ptype=long_path; ptype; ptype=ptype->NEXT) {
if ((char*)ptype->DATA==locon->NAME) break;
}
if (ptype) color=XSCH_RED_COLOR;
else color=XSCH_NEUTRAL_COLOR;
}
flush_stream_special(xsch_stream, locon->NAME, color, mes);
}
/*critical path*/
if (loinschain && long_path && color_mode==XSCH_CRITICAL_PATH) {
source=NULL;
last_sig=NULL;
for (ptype=long_path; ptype; ptype=ptype->NEXT) {
signame=ptype->DATA;
for (chain=loinschain; chain; chain=chain->NEXT) {
loins=chain->DATA;
/*search signal output*/
for (locon=loins->LOCON; locon; locon=locon->NEXT) {
if (locon->DIRECTION==OUT || locon->DIRECTION==INOUT
|| locon->DIRECTION==TRISTATE || locon->DIRECTION==TRANSCV) {
losig=locon->SIG;
if (losig->NAMECHAIN->DATA==signame) {
dest=loins->INSNAME;
break;
}
}
}
if (locon) break;
}
/*if no instance found it is external connector. it has the same name than signal*/
if (!locon) dest=signame;
if (source)
flush_path(xsch_stream, source, last_sig, dest, XSCH_RED_COLOR, delay, INTERNAL);
source=dest;
last_sig=signame;
}
/*for last signal search output*/
if (losig) {
ptype=getptype(losig->USER,LOFIGCHAIN);
for (chain=ptype->DATA; chain; chain=chain->NEXT) {
locon=chain->DATA;
/*port of circuit*/
if (locon->TYPE==EXTERNAL) {dest=locon->NAME; break;}
loins=locon->ROOT;
/*register input if no error*/
if (locon->DIRECTION==IN || locon->DIRECTION==INOUT || locon->DIRECTION==TRANSCV)
{dest=loins->INSNAME; break;}
}
flush_path(xsch_stream, source, signame, dest, XSCH_RED_COLOR, delay, losig->TYPE);
}
}
freechain(loinschain);
}
static ptype_list* search_long_path(loins_list* loins, befig_list* befig)
{
loins_list* loins_aux, *best_loins=NULL;
locon_list* locon;
losig_list* losig, *best_losig=NULL;
char* signame;
chain_list* loconchain;
ptype_list* ptype, *ret;
float max_delay=-1, delay;
bereg_list* bereg;
biabl_list* biabl;
if (!loins) {
fprintf(stderr,"search_long_path: NULL pointer\n");
exit(1);
}
/*seek the latest input in cell*/
for (locon=loins->LOCON; locon; locon=locon->NEXT) {
/*only inputs*/
if (locon->DIRECTION==OUT || locon->DIRECTION==TRISTATE
|| isvss(locon->NAME) || isvdd(locon->NAME)) continue;
losig=locon->SIG;
if (!losig->NAMECHAIN) {
fprintf(stderr,"search_long_path: NULL pointer\n");
exit(1);
}
signame=(char*) losig->NAMECHAIN->DATA;
delay=getdelay(signame);
if (delay>max_delay) {
best_losig=losig;
max_delay=delay;
}
}
/*no input found -> constant*/
if (!best_losig) return NULL;
losig=best_losig;
ptype=getptype(losig->USER,LOFIGCHAIN);
if (!ptype || !ptype->DATA) {
fprintf(stderr,"search_long_path: NULL pointer\n");
exit(1);
}
signame=(char*) losig->NAMECHAIN->DATA;
ret=addptype(NULL, (int) max_delay, signame);
/*stop at leaves or flip-flop */
if (losig->TYPE==EXTERNAL) return ret;
for (bereg=befig->BEREG; bereg; bereg=bereg->NEXT) {
if (bereg->NAME!=signame) continue;
/*is it a flip-flop?*/
for (biabl=bereg->BIABL; biabl; biabl=biabl->NEXT) {
if (getptype(biabl->USER,ABL_STABLE)) return ret;
}
}
/*search driver of signal (latest if bus)*/
max_delay=-1;
for (loconchain=(chain_list*) ptype->DATA; loconchain; loconchain=loconchain->NEXT) {
locon=(locon_list*) loconchain->DATA;
/*only outputs*/
if (locon->DIRECTION==IN || isvss(locon->NAME) || isvdd(locon->NAME)
|| locon->TYPE==EXTERNAL) continue;
loins_aux=locon->ROOT;
if (loins_aux==loins) continue;
delay=getdelay(loins_aux->INSNAME);
if (delay>max_delay) {
best_loins=loins_aux;
max_delay=delay;
}
}
if (!best_loins) {
fprintf(stderr,"search_long_path: no loins found for driving losig '%s'\n",signame);
exit(1);
}
ret->NEXT=search_long_path(best_loins, befig);
return ret;
}
static ptype_list* search_long_path(losig_list* losig, int ck_include)
{
loins_list* best_loins=NULL;
locon_list* locon;
losig_list *best_losig=NULL;
loins_list* loins;
befig_list* befig;
char* signame, *ck=NULL;
int reg=0; /*flag for flip-flop*/
chain_list* lofigchain;
ptype_list* ptype, *ret;
double max_delay=-1, delay;
cell_list* cell;
biabl_list* biabl;
if (!losig) {
fprintf(stderr,"search_long_path: NULL pointer\n");
autexit(1);
}
if (!losig->NAMECHAIN) {
fprintf(stderr,"search_long_path: no losig name\n");
autexit(1);
}
signame=(char*) losig->NAMECHAIN->DATA;
/*control combinational loop, not to recurse infinitively*/
if ( searchauthelem( ControlLoop, (char*) losig ) )
{
fprintf(stderr,"Warning: combinational loop on signal %s\n", signame );
return ret;
}
addauthelem( ControlLoop, (char*) losig, 1 );
/*search drivers*/
ptype=getptype(losig->USER,LOFIGCHAIN);
if (!ptype || !ptype->DATA) {
fprintf(stderr,"search_long_path: no lofigchain found\n");
autexit(1);
}
for (lofigchain=(chain_list*) ptype->DATA; lofigchain; lofigchain=lofigchain->NEXT) {
locon=(locon_list*) lofigchain->DATA;
if (locon->DIRECTION==UNKNOWN) {
fprintf(stderr,"BEH: 'linkage %s' isn't accepted\n",
locon->NAME);
autexit(1);
}
/*only outputs*/
if (isvss(locon->NAME) || isvdd(locon->NAME)
|| locon->DIRECTION==IN || locon->TYPE==EXTERNAL) continue;
loins=locon->ROOT;
delay=loins_delay(loins,signame);
if (delay>max_delay) {
best_loins=loins;
max_delay=delay;
}
}
loins=best_loins;
ret=addptype(NULL, (long) max_delay>=0?max_delay:getdelay(signame), losig);
if (!loins) return ret;
/*stop at flip-flop*/
cell=getCell(loins->FIGNAME);
if (!cell) {
fprintf(stderr,"library error: no cell '%s.vbe' found\n",
loins->FIGNAME);
autexit(1);
}
befig=cell->BEFIG;
if (befig->BEREG) {
for ( biabl = cell->BEFIG->BEREG->BIABL; biabl; biabl = biabl->NEXT )
{
ptype=getptype(biabl->USER,ABL_STABLE);
if (ptype) {
/*do not include clock in path*/
if (!ck_include) return ret;
reg=1;
ck=ptype->DATA;
break;
}
}
}
max_delay=-1;
/*seek the latest input in cell*/
for (locon=loins->LOCON; locon; locon=locon->NEXT) {
if (locon->DIRECTION==UNKNOWN) {
fprintf(stderr,"BEH: 'linkage %s' in figure '%s' isn't accepted\n",
locon->NAME,loins->FIGNAME);
autexit(1);
}
/*only inputs*/
if (locon->DIRECTION==OUT || locon->DIRECTION==TRISTATE
|| isvss(locon->NAME) || isvdd(locon->NAME)) continue;
/* if flip-flop, accept only clock */
if (reg && ck!=locon->NAME) continue;
losig=locon->SIG;
if (!losig->NAMECHAIN) {
fprintf(stderr,"search_long_path: no name on signal\n");
autexit(1);
}
signame=(char*) losig->NAMECHAIN->DATA;
delay=getdelay(signame);
if (delay>max_delay) {
best_losig=losig;
max_delay=delay;
}
}
losig=best_losig;
/*no input found -> constant*/
if (!losig) return ret;
ret->NEXT=search_long_path(losig,ck_include);
return ret;
}
static int insert_buffer(losig_list* losig, lofig_list* lofig, int optim_level, long index)
{
double capa, init_capa;
cell_list* buffer;
chain_list* namechain, *sigchain=NULL;
char* signame;
lofig_list* model;
losig_list* losig_buf;
loins_list* loins_buf;
locon_list* locon;
losig_list* losig_vdd=NULL, *losig_vss=NULL, *losig_aux;
ptype_list* ptype, *buffer_ptype;
double delay, best_delay, init_delay;
loins_list* loins;
chain_list* lofigchain,*newlofigchain=NULL;
int buffer_is_better=0, change=1; /*flags*/
chain_list* pred;
chain_list* temp;
buffer=getCellbuffer();
/*no buffer in library*/
if (!buffer) return 0;
if (!losig->NAMECHAIN) {
fprintf(stderr,"insert_buffer: no name on signal\n");
autexit(1);
}
best_delay=critical_delay(lofig);
init_capa=getcapacitance(losig->NAMECHAIN->DATA);
/*add buffer to netlist*/
signame=getautoname(losig->NAMECHAIN->DATA);
namechain=addchain(NULL,signame);
losig_buf=addlosig(lofig,index,namechain,INTERNAL);
putcapacitance(signame,0);
putdelay(signame,0);
model=getlofig(buffer->BEFIG->NAME,'A');
/*search vdd and vss*/
for (locon=lofig->LOCON; locon; locon=locon->NEXT) {
if (isvdd(locon->NAME)) losig_vdd=locon->SIG;
if (isvss(locon->NAME)) losig_vss=locon->SIG;
}
/*build list of signal*/
for (locon=model->LOCON;locon; locon=locon->NEXT) {
if (locon->DIRECTION==UNKNOWN) {
fprintf(stderr,"BEH: 'linkage %s' in figure '%s' isn't accepted\n",
locon->NAME,model->NAME);
autexit(1);
}
if (isvdd(locon->NAME)) losig_aux=losig_vdd;
else if (isvss(locon->NAME)) losig_aux=losig_vss;
else if (locon->DIRECTION==OUT) losig_aux=losig_buf;
else if (locon->DIRECTION==IN) losig_aux=losig;
else {
fprintf(stderr,"insert_buffer: buffer port '%s' unknown\n",locon->NAME);
autexit(1);
}
sigchain=addchain(sigchain,losig_aux);
}
sigchain=reverse(sigchain);
loins_buf=addloins(lofig,signame,model,sigchain);
freechain(sigchain);
/*to check changes*/
init_delay=getdelay(losig->NAMECHAIN->DATA);
init_capa=getcapacitance(losig->NAMECHAIN->DATA);
loins_capacitance(loins_buf,1/*add capa*/);
/*lofigchain*/
for (locon=loins_buf->LOCON;locon; locon=locon->NEXT) {
if (locon->DIRECTION==UNKNOWN) {
fprintf(stderr,"BEH: 'linkage %s' in figure '%s' isn't accepted\n",
locon->NAME,loins_buf->INSNAME);
autexit(1);
}
if (isvdd(locon->NAME)) losig_aux=losig_vdd;
else if (isvss(locon->NAME)) losig_aux=losig_vss;
else if (locon->DIRECTION==OUT) losig_aux=losig_buf;
else if (locon->DIRECTION==IN) losig_aux=losig;
else {
fprintf(stderr,"insert_buffer: buffer port '%s' unknown\n",locon->NAME);
autexit(1);
}
ptype=getptype(losig_aux->USER,LOFIGCHAIN);
if (!ptype) losig_aux->USER=addptype(losig_aux->USER,LOFIGCHAIN,addchain(NULL,locon));
else ptype->DATA=addchain(ptype->DATA,locon);
}
/*move all instance after buffer*/
ptype=getptype(losig->USER,LOFIGCHAIN);
buffer_ptype=getptype(losig_buf->USER,LOFIGCHAIN);
if (!ptype || !buffer_ptype) {
fprintf(stderr,"insert_buffer: LOFIGCHAIN not found\n");
autexit(1);
}
for (lofigchain=((chain_list*)ptype->DATA)->NEXT/*first is entry of buffer*/;
lofigchain; lofigchain=lofigchain->NEXT) {
locon=(locon_list*) lofigchain->DATA;
if (locon->DIRECTION==UNKNOWN) {
fprintf(stderr,"BEH: 'linkage %s' isn't accepted\n",
locon->NAME);
autexit(1);
}
/*do not move drivers and port of circuit*/
if (locon->TYPE==EXTERNAL || locon->DIRECTION!=IN) {
newlofigchain=addchain(newlofigchain,locon);
continue;
}
loins=locon->ROOT;
/*change capacitance*/
loins_capacitance(loins,0/*remove capa*/);
/*change netlist*/
locon->SIG=losig_buf;
buffer_ptype->DATA=addchain(buffer_ptype->DATA,locon);
loins_capacitance(loins,1/*add capa*/);
}
/*put back drivers*/
freechain(((chain_list*)ptype->DATA)->NEXT/*first is entry of buffer*/);
((chain_list*)ptype->DATA)->NEXT=newlofigchain;
/*eval all changes*/
propagate_loins_delay(loins_buf);
/*relaxation algorithm*/
while (change) {
change=0;
pred=NULL;
buffer_ptype=getptype(losig_buf->USER,LOFIGCHAIN);
ptype=getptype(losig->USER,LOFIGCHAIN);
if (!buffer_ptype || !buffer_ptype->DATA) {
fprintf(stderr,"insert_buffer: LOFIGCHAIN is empty\n");
autexit(1);
}
/*put critical path before buffer*/
for (lofigchain=buffer_ptype->DATA; lofigchain->NEXT/*last is buffer output*/;
lofigchain=lofigchain->NEXT) {
locon=lofigchain->DATA;
loins=locon->ROOT;
/*change capacitance*/
loins_capacitance(loins,0/*remove capa*/);
/*change netlist*/
locon->SIG=losig;
ptype->DATA=addchain(ptype->DATA,locon);
loins_capacitance(loins,1/*add capa*/);
/*put over*/
if (pred) pred->NEXT=lofigchain->NEXT;
else buffer_ptype->DATA=lofigchain->NEXT;
/*eval all changes*/
propagate_loins_delay(loins);
propagate_loins_delay(loins_buf);
delay=critical_delay(lofig);
if (delay<best_delay) {
/*finish change*/
best_delay=delay;
change=1; /*flag of change*/
buffer_is_better=1;
lofigchain->NEXT=NULL;
freechain(lofigchain);
break;
}
else {
/*remove change*/
if (pred) pred->NEXT=lofigchain;
else buffer_ptype->DATA=lofigchain;
/*unchange capacitance*/
loins_capacitance(loins,0/*remove capa*/);
/*unchange netlist*/
locon->SIG=losig_buf;
temp=ptype->DATA;
ptype->DATA=temp->NEXT;
temp->NEXT=NULL;
freechain(temp);
loins_capacitance(loins,1/*add capa*/);
/*avoid change*/
propagate_loins_delay(loins_buf);
propagate_loins_delay(loins);
/*for next loop*/
pred=lofigchain;
}
}
}/*end of while*/
if (buffer_is_better) {
/*chose the best buffer*/
change_instance(loins_buf, losig_buf, lofig, optim_level);
}
else { /*if insert buffer is worst than before, remove it*/
/*remove all references of buffer in lofigchain*/
for (locon=loins_buf->LOCON; locon; locon=locon->NEXT) {
losig_aux=locon->SIG;
ptype=getptype(losig_aux->USER,LOFIGCHAIN);
if (!ptype) break;
pred=NULL;
for (lofigchain=ptype->DATA; lofigchain; lofigchain=lofigchain->NEXT) {
if (lofigchain->DATA==locon) {
if (pred) pred->NEXT=lofigchain->NEXT;
else ptype->DATA=lofigchain->NEXT;
lofigchain->NEXT=NULL;
freechain(lofigchain);
break;
}
pred=lofigchain;
}
}
buffer_ptype=getptype(losig_buf->USER,LOFIGCHAIN);
ptype=getptype(losig->USER,LOFIGCHAIN);
if (buffer_ptype) {
for (lofigchain=buffer_ptype->DATA; lofigchain; lofigchain=lofigchain->NEXT) {
locon=lofigchain->DATA;
loins=locon->ROOT;
/*change capacitance*/
loins_capacitance(loins,0/*remove capa*/);
/*change netlist*/
locon->SIG=losig;
ptype->DATA=addchain(ptype->DATA,locon);
loins_capacitance(loins,1/*add capa*/);
propagate_loins_delay(loins);
}
freechain(buffer_ptype->DATA);
buffer_ptype->DATA=NULL;
}
loins_capacitance(loins_buf,0/*remove capa*/);
dellosig(lofig,index);
delloins(lofig,loins_buf->INSNAME);
propagate_losig_delay(losig);
/*verify no change on timing*/
delay=critical_delay(lofig);
capa=getcapacitance(losig->NAMECHAIN->DATA);
//01/09/2004 xtof's modification: rounding problem
if ((int)(capa + 0.5)!=(int)(init_capa + 0.5) || (int)(delay + 0.5)!=(int)(best_delay + 0.5)
|| (int)(init_delay + 0.5)!=(int)(getdelay(losig->NAMECHAIN->DATA) + 0.5)) {
fprintf(stderr,
"insert_buffer: compute error %e!=%e fF %f!=%f ps %f!=%f ps\n",
capa,init_capa,delay,best_delay, init_delay, getdelay(losig->NAMECHAIN->DATA));
autexit(1);
}
}
return buffer_is_better;
}
extern void adapt_for_cell(befig_list *befig)
{
beout_list* beout;
bebus_list* bebus;
bereg_list* bereg;
bebux_list* bebux;
beaux_list* beaux;
biabl_list* biabl;
bepor_list* bepor;
char* name;
/*constants*/
putcapacitance(getablatomone(),0);
putcapacitance(getablatomzero(),0);
/*init*/
for (beaux=befig->BEAUX; beaux; beaux=beaux->NEXT) {
name=getoppositename(beaux->NAME);
putcapacitance(beaux->NAME,0);
putcapacitance(name,0);
}
for (bereg=befig->BEREG; bereg; bereg=bereg->NEXT) {
name=getoppositename(bereg->NAME);
putcapacitance(bereg->NAME,0);
putcapacitance(name,0);
}
for (bebux=befig->BEBUX; bebux; bebux=bebux->NEXT) {
name=getoppositename(bebux->NAME);
putcapacitance(bebux->NAME,0);
putcapacitance(name,0);
}
for (bepor=befig->BEPOR; bepor; bepor=bepor->NEXT) {
/*inputs only*/
if (isvss(bepor->NAME) || isvdd(bepor->NAME)) continue;
switch (bepor->DIRECTION) {case OUT: case TRISTATE: continue;}
name=getoppositename(bepor->NAME);
putcapacitance(bepor->NAME,0);
putcapacitance(name,0);
}
/*adapt abl for cell of library and eval capacitance*/
for (beout=befig->BEOUT; beout; beout=beout->NEXT) {
beout->ABL=inv_oper(beout->ABL,0); /*propagate NOT*/
beout->ABL=build_negativ(beout->ABL); /*minimize inverters*/
/*adapt the abl to match with a big cell later*/
beout->ABL=adapt_abl(beout->ABL); /*count capacitance of leaves*/
}
for (beaux=befig->BEAUX; beaux; beaux=beaux->NEXT) {
beaux->ABL=inv_oper(beaux->ABL,0); /*propagate NOT*/
beaux->ABL=build_negativ(beaux->ABL); /*minmize number of NOT*/
beaux->ABL=adapt_abl(beaux->ABL); /*count capacitance of leaves*/
}
for (bebus=befig->BEBUS; bebus; bebus=bebus->NEXT) {
for (biabl=bebus->BIABL; biabl; biabl=biabl->NEXT) {
biabl->VALABL=inv_oper(biabl->VALABL,0); /*propagate NOT*/
biabl->CNDABL=inv_oper(biabl->CNDABL,0); /*propagate NOT*/
biabl->VALABL=build_negativ(biabl->VALABL); /*minimize NOT*/
biabl->CNDABL=build_negativ(biabl->CNDABL);
}
bebus->BIABL=adapt_bus(bebus->BIABL); /*count capacitance of leaves*/
}
for (bereg=befig->BEREG; bereg; bereg=bereg->NEXT) {
for (biabl=bereg->BIABL; biabl; biabl=biabl->NEXT) {
biabl->VALABL=inv_oper(biabl->VALABL,0); /*propagate NOT*/
biabl->CNDABL=inv_oper(biabl->CNDABL,0); /*propagate NOT*/
biabl->VALABL=build_negativ(biabl->VALABL); /*minimize NOT*/
biabl->CNDABL=build_negativ(biabl->CNDABL);
}
bereg->BIABL=adapt_reg(bereg->BIABL); /*count capacitance of leaves*/
}
for (bebux=befig->BEBUX; bebux; bebux=bebux->NEXT) {
for (biabl=bebux->BIABL; biabl; biabl=biabl->NEXT) {
biabl->VALABL=inv_oper(biabl->VALABL,0); /*propagate NOT*/
biabl->CNDABL=inv_oper(biabl->CNDABL,0); /*propagate NOT*/
biabl->VALABL=build_negativ(biabl->VALABL); /*minimize NOT*/
biabl->CNDABL=build_negativ(biabl->CNDABL);
}
bebux->BIABL=adapt_bus(bebux->BIABL); /*count capacitance of leaves*/
}
}
