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timer_cmds.cc
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timer_cmds.cc
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/*************************************************************************
*
* Copyright (c) 2021 Rajit Manohar
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
**************************************************************************
*/
#include <stdio.h>
#include <act/passes.h>
#include <common/list.h>
#include <common/pp.h>
#include <lispCli.h>
#include "all_cmds.h"
#include "ptr_manager.h"
#include "flow.h"
#include <act/tech.h>
#ifdef FOUND_timing_actpin
#include <act/timing/galois_api.h>
static double act_delay_units = -1.0;
static ActGaloisTiming *agt = NULL;
static void init (int mode = 0)
{
static int first = 1;
if (first) {
agt = NULL;
}
first = 0;
if (mode == 1) {
if (agt) {
delete agt;
agt = NULL;
}
first = 1;
}
init_galois_shmemsys (mode);
}
static ActId *my_parse_id (const char *name)
{
return ActId::parseId (name);
}
/*------------------------------------------------------------------------
*
* Read liberty file, return handle
*
*------------------------------------------------------------------------
*/
static void *read_lib_file (const char *file)
{
init();
FILE *fp = fopen (file, "r");
if (!fp) {
return NULL;
}
fclose (fp);
galois::eda::liberty::CellLib *lib = new galois::eda::liberty::CellLib;
if (lib->parse(file)) {
return (void *)lib;
}
else {
delete lib;
return NULL;
}
}
/*------------------------------------------------------------------------
*
* Read in a .lib file for timing/power analysis
*
*------------------------------------------------------------------------
*/
int process_read_lib (int argc, char **argv)
{
void *lib;
if (argc != 2) {
fprintf (stderr, "Usage: %s <liberty-file>\n", argv[0]);
return LISP_RET_ERROR;
}
lib = read_lib_file (argv[1]);
if (!lib) {
fprintf (stderr, "%s: could not open liberty file `%s'\n", argv[0], argv[1]);
return LISP_RET_ERROR;
}
save_to_log (argc, argv, "s");
LispSetReturnInt (ptr_register ("liberty", lib));
return LISP_RET_INT;
}
/*------------------------------------------------------------------------
*
* Read in a .lib file for timing/power analysis
*
*------------------------------------------------------------------------
*/
int process_merge_lib (int argc, char **argv)
{
int lh;
galois::eda::liberty::CellLib *cl;
FILE *fp;
if (argc != 3) {
fprintf (stderr, "Usage: %s <lh> <liberty-file>\n", argv[0]);
return LISP_RET_ERROR;
}
lh = atoi (argv[1]);
cl = (galois::eda::liberty::CellLib *) ptr_get ("liberty", lh);
if (!cl) {
fprintf (stderr, "%s: specified liberty file handle (%d) not found!\n", argv[0], lh);
return LISP_RET_ERROR;
}
fp = fopen (argv[2], "r");
if (!fp) {
fprintf (stderr, "%s: liberty file `%s' not found!\n", argv[0], argv[2]);
return LISP_RET_ERROR;
}
fclose (fp);
cl->parse (argv[2]);
save_to_log (argc, argv, "s");
return LISP_RET_TRUE;
}
static int get_net_to_timing_vertex (char *cmd, char *name, int *vid, char **pin = NULL)
{
ActId *id = my_parse_id (name);
int goff;
if (!F.tp) {
fprintf (stderr, "%s: cannot run without creating a timing graph!", cmd);
return 0;
}
if (!F.sp) {
ActPass *ap = F.act_design->pass_find ("collect_state");
if (!ap) {
fprintf (stderr, "Internal error: state pass missing but timer present?\n");
return 0;
}
F.sp = dynamic_cast<ActStatePass *> (ap);
Assert (F.sp, "What?");
}
if (!id) {
fprintf (stderr, "%s: could not parse identifier `%s'\n", cmd, name);
return 0;
}
Array *x;
InstType *itx;
/* -- validate the type of this identifier -- */
itx = F.act_toplevel->CurScope()->FullLookup (id, &x);
if (itx == NULL) {
fprintf (stderr, "%s: could not find identifier `%s'\n", cmd, name);
return 0;
}
if (!TypeFactory::isBoolType (itx)) {
fprintf (stderr, "%s: identifier `%s' is not a signal (", cmd, name);
itx->Print (stderr);
fprintf (stderr, ")\n");
return 0;
}
if (itx->arrayInfo() && (!x || !x->isDeref())) {
fprintf (stderr, "%s: identifier `%s' is an array.\n", cmd, name);
return 0;
}
/* -- check all the de-references are valid -- */
if (!id->validateDeref (F.act_toplevel->CurScope())) {
fprintf (stderr, "%s: `%s' contains an invalid array reference.\n", cmd, name);
return 0;
}
Assert (F.sp && F.tp, "Hmm");
if (!F.sp->checkIdExists (id)) {
id->Print (stderr);
fprintf (stderr, ": identifier not found in the timing graph!\n");
return 0;
}
goff = F.sp->globalBoolOffset (id);
TaggedTG *tg = (TaggedTG *) F.tp->getMap (F.act_toplevel);
stateinfo_t *si = F.sp->getStateInfo (F.act_toplevel);
Assert (tg && si, "What?");
*vid = 2*(tg->globOffset() + si->ports.numBools() + goff);
if (pin) {
char *tmp;
int len = 0;
*pin = name + strlen (name);
while (*pin > name && *((*pin)-1) != '.') {
*pin = *pin - 1;
len++;
}
*pin = Strdup (*pin);
(*pin)[len] = '\0';
}
return 1;
}
/*
* Check if this is a Boolean array
*/
static ActId *is_arrayed_boolean (char *cmd, char *name, Array **aref)
{
ActId *id = my_parse_id (name);
if (!id) {
return NULL;
}
Array *x;
InstType *itx;
/* -- validate the type of this identifier -- */
itx = F.act_toplevel->CurScope()->FullLookup (id, &x);
if (itx == NULL) {
delete id;
return NULL;
}
if (!TypeFactory::isBoolType (itx)) {
delete id;
return NULL;
}
if (!itx->arrayInfo() || (x && x->isDeref())) {
delete id;
return NULL;
}
if (aref) {
*aref = itx->arrayInfo();
}
id->Tail()->setArray (NULL);
/* -- check all the de-references are valid -- */
if (!id->validateDeref (F.act_toplevel->CurScope())) {
delete id;
return NULL;
}
id->Tail()->setArray (x);
return id;
}
/*------------------------------------------------------------------------
*
* process_timer_build -
*
*------------------------------------------------------------------------
*/
static int process_timer_build (int argc, char **argv)
{
if (!std_argcheck (argc, argv, 1, "", STATE_EXPANDED)) {
return LISP_RET_ERROR;
}
if (!F.act_toplevel) {
fprintf (stderr, "%s: need top level of design set\n", argv[0]);
return LISP_RET_ERROR;
}
ActPass *ap = F.act_design->pass_find ("taggedTG");
if (!ap) {
fprintf (stderr, "%s: no timing graph construction pass found\n", argv[0]);
return LISP_RET_ERROR;
}
F.tp = dynamic_cast<ActDynamicPass *> (ap);
Assert (F.tp, "Hmm");
/* -- create timing graph -- */
if (!F.tp->completed()) {
F.tp->run (F.act_toplevel);
}
save_to_log (argc, argv, "s");
return LISP_RET_TRUE;
}
static int process_timer_tick (int argc, char **argv)
{
if (!std_argcheck (argc, argv, 3, "<net1>+/- <net2>+/-", STATE_EXPANDED)) {
return LISP_RET_ERROR;
}
if (!F.tp) {
fprintf (stderr, "%s: need to build timing graph first.\n", argv[0]);
return LISP_RET_ERROR;
}
if (F.timer == TIMER_RUN) {
fprintf (stderr, "%s: need to mark edges before running the timer.\n", argv[0]);
return LISP_RET_ERROR;
}
int dir1, dir2;
int len1, len2;
len1 = strlen (argv[1]);
len2 = strlen (argv[2]);
if (argv[1][len1-1] == '+') {
dir1 = 1;
}
else if (argv[1][len1-1] == '-') {
dir1 = 0;
}
else {
fprintf (stderr, "%s: need a direction (+/-) for %s\n", argv[0], argv[1]);
return LISP_RET_ERROR;
}
if (argv[2][len2-1] == '+') {
dir2 = 1;
}
else if (argv[2][len2-1] == '-') {
dir2 = 0;
}
else {
fprintf (stderr, "%s: need a direction (+/-) for %s\n", argv[0], argv[2]);
return LISP_RET_ERROR;
}
argv[1][len1-1] = '\0';
argv[2][len2-1] = '\0';
char *tmp1 = Strdup (argv[1]);
char *tmp2 = Strdup (argv[2]);
argv[1][len1-1] = dir1 ? '+' : '-';
argv[2][len2-1] = dir2 ? '+' : '-';
int vid1, vid2;
if (!get_net_to_timing_vertex (argv[0], tmp1, &vid1) ||
!get_net_to_timing_vertex (argv[0], tmp2, &vid2)) {
FREE (tmp1);
FREE (tmp2);
return LISP_RET_ERROR;
}
FREE (tmp1);
FREE (tmp2);
vid1 += dir1;
vid2 += dir2;
TaggedTG *tg = (TaggedTG *) F.tp->getMap (F.act_toplevel);
/* find *all* edges from vid1 to vid2 */
AGvertexFwdIter fw(tg, vid1);
int found = 0;
for (fw = fw.begin(); fw != fw.end(); fw++) {
AGedge *e = (*fw);
if (e->dst != vid2) {
continue;
}
TimingEdgeInfo *te = (TimingEdgeInfo *)e->getInfo();
te->tickEdge();
found = 1;
}
if (found == 0) {
fprintf (stderr, "%s: could not find timing edge %s -> %s\n", argv[0],
argv[1], argv[2]);
return LISP_RET_ERROR;
}
save_to_log (argc, argv, "s*");
return LISP_RET_TRUE;
}
/*------------------------------------------------------------------------
*
* Create timing graph and push it to the timing analysis engine
*
*------------------------------------------------------------------------
*/
int process_timer_init (int argc, char **argv)
{
if (!std_argcheck ((argc > 2 ? 2 : argc), argv, 2, "<lib-id1> <lib-id2> ...", STATE_EXPANDED)) {
return LISP_RET_ERROR;
}
if (!F.act_toplevel) {
fprintf (stderr, "%s: need top level of design set\n", argv[0]);
return LISP_RET_ERROR;
}
/* -- add cell library -- */
galois::eda::liberty::CellLib **libs;
MALLOC (libs, galois::eda::liberty::CellLib *, argc-1);
for (int i=1; i < argc; i++) {
libs[i-1] = (galois::eda::liberty::CellLib *) ptr_get ("liberty", atoi(argv[i]));
if (!libs[i-1]) {
fprintf (stderr, "%s: timing lib file #%d (`%s') not found\n", argv[0],
i-1, argv[i]);
FREE (libs);
return LISP_RET_ERROR;
}
}
if (agt) {
delete agt;
}
agt = new ActGaloisTiming (F.act_design,
F.act_toplevel,
argc-1, libs);
if (agt->tgError()) {
fprintf (stderr, "%s: failed to initialize timer.\n", argv[0]);
if (agt->getError()) {
fprintf (stderr, " -> %s\n", agt->getError());
}
return LISP_RET_ERROR;
}
F.timer = TIMER_INIT;
ActPass *ap = F.act_design->pass_find ("taggedTG");
if (!ap) {
fprintf (stderr, "%s: no timing graph construction pass found\n", argv[0]);
return LISP_RET_ERROR;
}
F.tp = dynamic_cast<ActDynamicPass *> (ap);
Assert (F.tp, "Hmm");
save_to_log (argc, argv, "i*");
return LISP_RET_TRUE;
}
/*------------------------------------------------------------------------
*
* Run the timing analysis engine
*
*------------------------------------------------------------------------
*/
int process_timer_run (int argc, char **argv)
{
if (!std_argcheck (argc, argv, 1, "", STATE_EXPANDED)) {
return LISP_RET_ERROR;
}
if (F.timer == TIMER_NONE) {
fprintf (stderr, "%s: timer needs to be initialized\n", argv[0]);
return LISP_RET_ERROR;
}
if (!agt) {
fprintf (stderr, "%s: timer needs to be initialized (inconsistency?)\n",
argv[0]);
return LISP_RET_ERROR;
}
if (!agt->runFullTiming ()) {
fprintf (stderr, "%s: error running timer\n", argv[0]);
if (agt->getError()) {
fprintf (stderr, " -> %s\n", agt->getError());
}
return LISP_RET_ERROR;
}
save_to_log (argc, argv, "");
F.timer = TIMER_RUN;
double p = 0.0;
int M = 0;
agt->getPeriod (&p, &M);
LispSetReturnListStart ();
LispAppendReturnFloat (p);
LispAppendReturnInt (M);
LispSetReturnListEnd ();
return LISP_RET_LIST;
}
/*------------------------------------------------------------------------
*
* Read in SPEF file
*
*------------------------------------------------------------------------
*/
int process_timer_spef (int argc, char **argv)
{
if (!std_argcheck (argc, argv, 2, "<file>", STATE_EXPANDED)) {
return LISP_RET_ERROR;
}
if (F.timer == TIMER_NONE) {
fprintf (stderr, "%s: timer needs to be initialized\n", argv[0]);
return LISP_RET_ERROR;
}
if (!agt) {
fprintf (stderr, "%s: timer needs to be initialized (inconsistency?)\n", argv[0]);
return LISP_RET_ERROR;
}
FILE *fp = fopen (argv[1], "r");
if (!fp) {
fprintf (stderr, "%s: file `%s' not found\n", argv[0], argv[1]);
return LISP_RET_ERROR;
}
fclose (fp);
try {
if (!agt->readSPEF (argv[1])) {
fprintf (stderr, "%s: could not read SPEF `%s'\n", argv[0], argv[1]);
if (agt->getError()) {
fprintf (stderr, " -> %s\n", agt->getError());
}
return LISP_RET_ERROR;
}
} catch (galois::eda::parasitics::spef_exc &e) {
fprintf (stderr, "%s: resetting SPEF information\n", argv[0]);
agt->resetSPEF ();
return LISP_RET_ERROR;
}
save_to_log (argc, argv, "s");
return LISP_RET_TRUE;
}
static double my_round (double d)
{
d = d*1e5 + 0.5;
d = ((int)d)/1.0e5;
return d;
}
static double my_round_2 (double d)
{
d = d*1e2 + 0.5;
d = ((int)d)/1.0e2;
return d;
}
int process_timer_info (int argc, char **argv)
{
if (!std_argcheck (argc, argv, 2, "<net>", STATE_EXPANDED)) {
return LISP_RET_ERROR;
}
if (F.timer != TIMER_RUN) {
fprintf (stderr, "%s: timer needs to be run first\n", argv[0]);
return LISP_RET_ERROR;
}
if (!F.sp) {
ActPass *ap = F.act_design->pass_find ("collect_state");
if (!ap) {
fprintf (stderr, "Internal error: state pass missing but timer present?\n");
return LISP_RET_ERROR;
}
F.sp = dynamic_cast<ActStatePass *> (ap);
Assert (F.sp, "What?");
}
int vid;
if (!get_net_to_timing_vertex (argv[0], argv[1], &vid)) {
return LISP_RET_ERROR;
}
TaggedTG *tg = (TaggedTG *) F.tp->getMap (F.act_toplevel);
Assert (tg, "What?");
Assert (agt, "What?!");
list_t *l = agt->queryAll (vid);
if (l) {
listitem_t *li;
double p;
int M;
int count = 0;
agt->getPeriod (&p, &M);
if (M == 0) {
warning ("No critical cycle found; is the circuit acyclic?");
return LISP_RET_ERROR;
}
for (li = list_first (l); li; li = list_next (li)) {
struct timing_info *ti = (struct timing_info *) list_value (li);
char buf[10240];
ti->pin->sPrintFullName (buf, 10240);
printf ("%s%c (%s) [%s] slew: %g\n", buf, ti->dir ? '+' : '-',
ti->getDir() ? "rise" : "fall", (count < 2 ? "driver" : "driven pin"),
ti->getSlew ());
for (int i=0; i < M; i++) {
printf ("\titer %2d: arr: %g; req: %g; slk: %g\n", i,
ti->getArrv (i), ti->getReq (i),
my_round (ti->getReq(i) - ti->getArrv(i)));
}
count++;
}
}
agt->queryFree (l);
save_to_log (argc, argv, "s");
return LISP_RET_TRUE;
}
int process_timer_cycle (int argc, char **argv)
{
if (!std_argcheck (argc, argv, 1, "", STATE_EXPANDED)) {
return LISP_RET_ERROR;
}
if (F.timer != TIMER_RUN) {
fprintf (stderr, "%s: timer needs to be run first\n", argv[0]);
return LISP_RET_ERROR;
}
Assert (agt, "What?");
cyclone::TimingPath cyc = agt->getCritCycle ();
if (cyc.empty()) {
printf ("%s: No critical cycle.\n", argv[0]);
}
else {
pp_t *pp = pp_init (stdout, output_window_width);
agt->displayPath (pp, cyc, 1);
pp_stop (pp);
}
save_to_log (argc, argv, "s*");
return LISP_RET_TRUE;
}
int process_timer_addconstraint (int argc, char **argv)
{
if (!std_argcheck (argc == 5 ? 4 : argc, argv, 4, "<root>+/- [*]<fast>[+/-] [*]<slow>[+/-] [margin]", STATE_EXPANDED)) {
return LISP_RET_ERROR;
}
if (!F.tp) {
fprintf (stderr, "%s: need to build timing graph first.\n", argv[0]);
return LISP_RET_ERROR;
}
if (F.timer == TIMER_INIT || F.timer == TIMER_RUN) {
fprintf (stderr, "%s: need to add constraints before initializing the timer.\n", argv[0]);
return LISP_RET_ERROR;
}
TaggedTG *tg = (TaggedTG *) F.tp->getMap (F.act_toplevel);
int margin;
if (argc == 5) {
margin = atoi (argv[4]);
}
else {
margin = 0;
}
int dir[3];
int len[3];
int vid[3];
ActId *array_expand[2]; // for vid[1] and vid[2]
Array *array_type[2];
int tick[3];
tick[0] = 0;
for (int i=0; i < 3; i++) {
len[i] = strlen (argv[i+1]);
if (argv[i+1][len[i]-1] == '+') {
dir[i] = 1;
}
else if (argv[i+1][len[i]-1] == '-') {
dir[i] = 0;
}
else {
dir[i] = -1; // elaborate to both
if (i == 0) {
fprintf (stderr, "%s: need a direction (+/-) for %s\n", argv[0],
argv[i+1]);
return LISP_RET_ERROR;
}
}
if (dir[i] != -1) {
argv[i+1][len[i]-1] = '\0';
}
char *tmpname = Strdup (argv[i+1]);
if (dir[i] != -1) {
argv[i+1][len[i]-1] = dir[i] ? '+' : '-';
}
if (i > 0) {
if (argv[i+1][0] == '*') {
tick[i] = 1;
}
else {
tick[i] = 0;
}
}
// check if this is a valid net
if (i != 0) {
array_expand[i-1] =
is_arrayed_boolean (argv[0], tick[i] + tmpname, &array_type[i-1]);
}
if (i == 0 || array_expand[i-1] == NULL) {
if (!get_net_to_timing_vertex (argv[0], tick[i] + tmpname, &vid[i])) {
FREE (tmpname);
return LISP_RET_ERROR;
}
}
FREE (tmpname);
if (dir[i] != -1) {
vid[i] += dir[i];
}
}
// we may need to do some array unrolling
Arraystep *as[2];
ActId *tail[2];
Array *orig_array[2];
for (int i=0; i < 2; i++) {
if (array_expand[i]) {
Assert (array_type[i], "Array without an arrayed type??");
tail[i] = array_expand[i]->Tail();
orig_array[i] = tail[i]->arrayInfo();
array_expand[i]->Tail()->setArray (NULL);
as[i] = array_type[i]->stepper (orig_array[i]);
if (as[i]->isend()) {
fprintf (stderr, "%s: array for `", argv[0]);
array_expand[i]->Print (stderr);
fprintf (stderr, "' is empty.\n");
delete as[i];
as[i] = NULL;
}
}
else {
as[i] = NULL;
}
}
#define FREE_ON_ERROR \
do { \
for (int i=0; i < 2; i++) { \
if (as[i]) { \
delete as[i]; \
} \
if (array_expand[i]) { \
delete array_expand[i]; \
if (orig_array[i]) { \
delete orig_array[i]; \
} \
} \
} \
} while (0)
if (!as[0] && array_expand[0] || !as[1] && array_expand[1]) {
// we have a problem!
fprintf (stderr, "%s: unrolling array failed.\n", argv[0]);
FREE_ON_ERROR;
return LISP_RET_ERROR;
}
do {
// pick first element of array, if any
if (as[0]) {
Array *tmpa = as[0]->toArray();
tail[0]->setArray (tmpa);
as[0]->step();
char buf[10240];
array_expand[0]->sPrint (buf, 10240);
tail[0]->setArray (NULL);
delete tmpa;
if (!get_net_to_timing_vertex (argv[0], buf, &vid[1])) {
FREE_ON_ERROR;
return LISP_RET_ERROR;
}
}
do {
if (as[1]) {
Array *tmpa = as[1]->toArray();
tail[1]->setArray (tmpa);
as[1]->step();
char buf[10240];
array_expand[1]->sPrint (buf, 10240);
tail[1]->setArray (NULL);
delete tmpa;
if (!get_net_to_timing_vertex (argv[0], buf, &vid[2])) {
FREE_ON_ERROR;
return LISP_RET_ERROR;
}
}
/* add constraint! */
int cid = tg->addConstraint (vid[0], vid[1], vid[2], margin);
TaggedTG::constraint *c = tg->getConstraint (cid);
Assert (c, "Hmm");
c->from_tick = tick[1];
c->to_tick = tick[2];
if (dir[1] == -1) {
c->from_dir = 0;
}
if (dir[2] == -1) {
c->to_dir = 0;
}
} while (as[1] && !as[1]->isend());
} while (as[0] && !as[0]->isend());
save_to_log (argc, argv, "sssi");
#undef FREE_ON_ERROR
return LISP_RET_TRUE;
}
static void _set_delay_units (void)
{
if (act_delay_units == -1.0) {
if (config_exists ("net.delay")) {
act_delay_units = config_get_real ("net.delay");
}
else {
/* rule of thumb: FO4 is roughly F/2 ps where F is in nm units */
act_delay_units = config_get_real ("net.lambda")*1e-3;
}
}
}
#if 0
/*
This was used as a proxy for the correct timing fork check before
the timing fork check was implemented.
This is a simplified check that validates the arrival time, assuming
that the AND-causal timing is precise.
*/
/*
Return slack of a timing constraint in timer units
margin : c->margin, but in timer units
p, M : cycle period and ticks on critical cycle
iteration : 0 <= iteration < M : the iteration to check
*/
static double get_slack (TaggedTG::constraint *c,
timing_info *from, timing_info *to,
int iteration,
double margin,
double p,
int M)
{
int j;
double adj = 0;
if (c->from_tick == c->to_tick) {
j = iteration;
}
else if (c->from_tick) {
j = (iteration+M-1) % M;
if (j >= iteration) {
adj = -M*p;
}
}
else {
j = (iteration+1) % M;
if (j <= iteration) {
adj = M*p;
}
}
double x = (to->arr[j] - from->arr[iteration] + adj);
return (x - margin);
}
#endif
static double _time_print (double amt, char *unit)
{
if (fabs(amt) < 1e-9) {
amt *= 1e12;
*unit = 'p';
}
else if (fabs(amt) < 1e-6) {
*unit = 'n';
amt *= 1e9;
}
else {
*unit = 'u';
amt *= 1e6;
}
return amt;
}
int process_timer_constraint (int argc, char **argv)
{
double wns = 0;
double tns = 0;
int num_errs = 0;
if (!std_argcheck (argc, argv, argc == 1 ? 1 : 2, "[<net>]", STATE_EXPANDED)) {
return LISP_RET_ERROR;
}
if (F.timer != TIMER_RUN) {
fprintf (stderr, "%s: timer needs to be run first\n", argv[0]);
return LISP_RET_ERROR;
}
if (!F.sp) {
ActPass *ap = F.act_design->pass_find ("collect_state");
if (!ap) {
fprintf (stderr, "Internal error: state pass missing but timer present?\n");
return LISP_RET_ERROR;
}
F.sp = dynamic_cast<ActStatePass *> (ap);
Assert (F.sp, "What?");
}
int vid;
if (argc == 2) {
if (!get_net_to_timing_vertex (argv[0], argv[1], &vid)) {
return LISP_RET_ERROR;
}
}
else {
vid = -1;
}
Assert (agt, "What?");
int M;
double p;
agt->getPeriod (&p, &M);
if (M == 0) {
warning ("No critical cycle found; is the circuit acyclic?");
return LISP_RET_ERROR;