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chpsim.cc
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chpsim.cc
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/*************************************************************************
*
* Copyright (c) 2020 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 <common/config.h>
#include "chpsim.h"
#include <common/simdes.h>
#include <dlfcn.h>
#include <common/pp.h>
class ChpSim;
#ifndef MAX
#define MAX(a,b) ((a) < (b) ? (b) : (a))
#endif
int ChpSimGraph::cur_pending_count = 0;
int ChpSimGraph::max_pending_count = 0;
int ChpSimGraph::max_stats = 0;
extern ActSim *glob_sim;
/*
*
* Dummy object used for adding an "idle" to the channel trace log
*
*/
class ChanTraceDelayed : public SimDES {
public:
ChanTraceDelayed (const ActSim::watchpt_bucket *n) { _n = n; _has_val = 0; }
ChanTraceDelayed (const ActSim::watchpt_bucket *n, const BigInt &x) { _n = n; _has_val = 1; _v = x; }
~ChanTraceDelayed () { _n = NULL; }
int Step (Event *ev) {
BigInt xtm = SimDES::CurTime();
float tm = glob_sim->curTimeMetricUnits ();
int len = xtm.getLen();
unsigned long tval;
unsigned long *ptm;
if (len == 1) {
tval = xtm.getVal (0);
ptm = &tval;
}
else {
MALLOC (ptm, unsigned long, len);
for (int i=0; i < len; i++) {
ptm[i] = xtm.getVal (i);
}
}
unsigned long *value;
value = NULL;
if (_has_val) {
if (_v.getLen() > 1) {
MALLOC (value, unsigned long, _v.getLen());
for (int i=0; i < _v.getLen(); i++) {
value[i] = _v.getVal (i);
}
}
}
for (int fmt=0; fmt < TRACE_NUM_FORMATS; fmt++) {
act_trace_t *tr = glob_sim->getTrace (fmt);
if (tr && !((_n->ignore_fmt >> fmt) & 1)) {
if (act_trace_has_alt (tr->t)) {
if (_has_val) {
if (_v.getLen() == 1) {
act_trace_chan_change_alt (tr, _n->node[fmt], len, ptm,
ACT_CHAN_VALUE, _v.getVal (0));
}
else {
act_trace_wide_chan_change_alt (tr, _n->node[fmt], len, ptm,
ACT_CHAN_VALUE,
_v.getLen(), value);
}
}
else {
act_trace_chan_change_alt (tr, _n->node[fmt], len, ptm,
ACT_CHAN_IDLE, 0);
}
}
else {
if (_has_val) {
if (_v.getLen() == 1) {
act_trace_chan_change (tr, _n->node[fmt], tm,
ACT_CHAN_VALUE, _v.getVal (0));
}
else {
act_trace_wide_chan_change (tr, _n->node[fmt], tm,
ACT_CHAN_VALUE, _v.getLen(), value);
}
}
else {
act_trace_chan_change (tr, _n->node[fmt], tm, ACT_CHAN_IDLE, 0);
}
}
}
}
if (len > 1) {
FREE (ptm);
}
if (_has_val && _v.getLen() > 1) {
FREE (value);
}
delete this;
return 1;
}
private:
const ActSim::watchpt_bucket *_n;
unsigned int _has_val:1;
BigInt _v;
};
//#define DUMP_ALL
static int stat_count = 0;
static void _chp_print (pp_t *pp, act_chp_lang_t *c, int prec = 0)
{
int lprec = 0;
if (!c) return;
if (c->label) {
pp_printf (pp, "%s: ", c->label);
pp_setb (pp);
}
switch (c->type) {
case ACT_CHP_COMMA:
case ACT_CHP_SEMI:
{
listitem_t *li;
for (li = list_first (c->u.semi_comma.cmd); li; li = list_next (li)) {
_chp_print (pp, (act_chp_lang_t *)list_value (li), lprec);
}
}
break;
case ACT_CHP_LOOP:
case ACT_CHP_DOLOOP:
case ACT_CHP_SELECT:
case ACT_CHP_SELECT_NONDET:
if (c->type == ACT_CHP_LOOP || c->type == ACT_CHP_DOLOOP) {
pp_printf (pp, "*");
}
pp_printf (pp, "[");
if (c->type == ACT_CHP_SELECT_NONDET) {
pp_printf (pp, "|");
}
pp_setb (pp);
pp_printf (pp, " ");
{
act_chp_gc_t *gc = c->u.gc;
if (c->type == ACT_CHP_DOLOOP) {
pp_printf (pp, " ");
_chp_print (pp, gc->s, 0);
pp_printf (pp, " <- ");
if (gc->g) {
char buf[10240];
sprint_uexpr (buf, 10240, gc->g);
pp_printf (pp, "%s", buf);
}
else {
pp_printf (pp, "true");
}
pp_printf (pp, " { %d }", stat_count++);
}
else {
while (gc) {
pp_setb (pp);
if (!gc->g) {
if (c->type == ACT_CHP_LOOP) {
pp_printf (pp, "true");
}
else {
pp_printf (pp, "else");
}
}
else {
char buf[10240];
sprint_uexpr (buf, 10240, gc->g);
pp_printf (pp, "%s", buf);
}
pp_printf (pp, " { %d }", stat_count++);
if (gc->s) {
pp_printf (pp, " -> ");
pp_lazy (pp, 0);
_chp_print (pp, gc->s, 0);
}
pp_endb (pp);
if (gc->next) {
pp_united (pp, -1);
pp_printf (pp, " [] ");
}
gc = gc->next;
}
}
}
pp_endb (pp);
pp_printf (pp, " ");
pp_lazy (pp, 0);
if (c->type == ACT_CHP_SELECT_NONDET) {
pp_printf (pp, "|");
}
pp_printf (pp, "]");
pp_lazy (pp, 0);
break;
case ACT_CHP_SKIP:
case ACT_CHP_ASSIGN:
case ACT_CHP_ASSIGNSELF:
case ACT_CHP_SEND:
case ACT_CHP_RECV:
case ACT_CHP_FUNC:
case ACT_CHP_MACRO:
pp_printf (pp, ".");
pp_lazy (pp, 0);
break;
case ACT_HSE_FRAGMENTS:
do {
_chp_print (pp, c->u.frag.body);
pp_printf (pp, " : %s", c->u.frag.nextlabel);
c = c->u.frag.next;
if (c) {
pp_printf (pp, ";\n");
pp_forced (pp, 0);
pp_printf (pp, "%s : ", c->label);
}
} while (c);
break;
default:
fatal_error ("Unknown type");
break;
}
if (c->label) {
pp_endb (pp);
}
}
static void chp_print_stats (pp_t *pp, act_chp_lang_t *c)
{
stat_count = 0;
_chp_print (pp, c);
}
static void _get_costs (stateinfo_t *si, ActId *id, chpsimstmt *stmt)
{
char buf[1024];
char *nsname;
if (si->bnl->p->getns() != ActNamespace::Global()) {
nsname = si->bnl->p->getns()->Name();
}
else {
nsname = NULL;
}
char tmpbuf[900], tmpbuf2[900];
if (nsname) {
snprintf (tmpbuf, 900, "%s::%s", nsname+2, si->bnl->p->getName());
FREE (nsname);
nsname = NULL;
}
else {
snprintf (tmpbuf, 900, "%s", si->bnl->p->getName());
}
id->sPrint (tmpbuf2, 900);
if (debug_metrics) {
fprintf (stderr, "Looking for metrics for: %s [%s]\n", tmpbuf, tmpbuf2);
}
snprintf (buf, 1024, "sim.chp.%s.%s.D", tmpbuf, tmpbuf2);
if (config_exists (buf)) {
if (debug_metrics) fprintf (stderr, " >> found %s\n", buf);
stmt->delay_cost = config_get_int (buf);
if (stmt->delay_cost < 0) {
stmt->delay_cost = 0;
}
}
else {
// default delay is 10
stmt->delay_cost = config_get_int ("sim.chp.default_delay");
}
snprintf (buf, 1024, "sim.chp.%s.%s.D_bw", tmpbuf, tmpbuf2);
if (config_exists (buf)) {
if (debug_metrics) fprintf (stderr, " >> found %s\n", buf);
stmt->bw_cost = config_get_int (buf);
}
else {
stmt->bw_cost = 0;
}
snprintf (buf, 1024, "sim.chp.%s.%s.E", tmpbuf, tmpbuf2);
if (config_exists (buf)) {
if (debug_metrics) fprintf (stderr, " >> found %s\n", buf);
stmt->energy_cost = config_get_int (buf);
if (stmt->energy_cost < 0) {
stmt->energy_cost = 0;
}
}
else {
// default energy is 0
stmt->energy_cost = config_get_int ("sim.chp.default_energy");
}
}
static pHashtable *_ZEROHASH = NULL;
static int _addhash (ChpSimGraph *g)
{
phash_bucket_t *b;
if (!_ZEROHASH) {
_ZEROHASH = phash_new (16);
}
b = phash_lookup (_ZEROHASH, g);
if (b) {
return 1;
}
b = phash_add (_ZEROHASH, g);
return 0;
}
static void _clrhash ()
{
phash_free (_ZEROHASH);
_ZEROHASH = NULL;
}
ChpSim::ChpSim (ChpSimGraph *g, int max_cnt, int max_stats,
act_chp_lang_t *c, ActSimCore *sim, Process *p)
: ActSimObj (sim, p)
{
char buf[1024];
_deadlock_pc = NULL;
_stalled_pc = list_new ();
_probe = NULL;
_savedc = c;
_energy_cost = 0;
_leakage_cost = 0.0;
_area_cost = 0;
_statestk = NULL;
_cureval = NULL;
_frag_ch = NULL;
_hse_mode = 0; /* default is CHP */
_maxstats = max_stats;
if (_maxstats > 0) {
MALLOC (_stats, unsigned long, _maxstats);
for (int i=0; i < _maxstats; i++) {
_stats[i] = 0;
}
}
if (p) {
char *nsname;
if (p->getns() != ActNamespace::Global()) {
nsname = p->getns()->Name();
}
else {
nsname = NULL;
}
char tmpbuf[900];
if (nsname) {
snprintf (tmpbuf, 900, "%s::%s", nsname+2, p->getName());
FREE (nsname);
}
else {
snprintf (tmpbuf, 900, "%s", p->getName());
}
snprintf (buf, 1024, "sim.chp.%s.leakage", tmpbuf);
if (config_exists (buf)) {
_leakage_cost = config_get_real (buf);
}
else {
_leakage_cost = config_get_real ("sim.chp.default_leakage");
}
snprintf (buf, 1024, "sim.chp.%s.area", tmpbuf);
if (config_exists (buf)) {
_area_cost = config_get_int (buf);
}
else {
_area_cost = config_get_int ("sim.chp.default_area");
}
}
if (c) {
/*
Analyze the chp body to find out the maximum number of concurrent
threads; those are the event types.
*/
_npc = _max_program_counters (c);
_pcused = 1;
Assert (_npc >= 1, "What?");
if (_npc > SIM_EV_MAX-1) {
fatal_error ("Currently there is a hard limit of %d concurrent modules within a single CHP block. Your program requires %d.", SIM_EV_MAX, _npc);
}
_pc = (ChpSimGraph **)
sim->getState()->allocState (sizeof (ChpSimGraph *)*_npc);
_holes = (int *) sim->getState()->allocState (sizeof (int)*_npc);
for (int i=0; i < _npc; i++) {
_pc[i] = NULL;
_holes[i] = i;
}
_holes[0] = -1;
if (max_cnt > 0) {
_tot = (int *)sim->getState()->allocState (sizeof (int)*max_cnt);
for (int i=0; i < max_cnt; i++) {
_tot[i] = 0;
}
}
else {
_tot = NULL;
}
Assert (_npc >= 1, "What?");
_pc[0] = g;
_statestk = list_new ();
_initEvent ();
}
else {
_pc = NULL;
_npc = 0;
}
}
void ChpSim::zeroInit ()
{
if (_pc && _pc[0]) {
_zeroAllIntsChans (_pc[0]);
_clrhash ();
}
}
void ChpSim::reStart (ChpSimGraph *g, int max_cnt)
{
for (int i=0; i < _npc; i++) {
_pc[i] = NULL;
}
for (int i=0; i < max_cnt; i++) {
_tot[i] = 0;
}
_pc[0] = g;
_nextEvent (0);
}
ChpSim::~ChpSim()
{
if (_statestk) {
list_free (_statestk);
}
list_free (_stalled_pc);
if (_deadlock_pc) {
list_free (_deadlock_pc);
}
if (_maxstats > 0) {
FREE (_stats);
}
}
int ChpSim::_nextEvent (int pc)
{
while (_pc[pc] && !_pc[pc]->stmt) {
pc = _updatepc (pc);
}
if (_pc[pc]) {
new Event (this, SIM_EV_MKTYPE (pc,0) /* pc */,
_sc->getDelay (_pc[pc]->stmt->delay_cost));
return 1;
}
return 0;
}
void ChpSim::_initEvent ()
{
_nextEvent (0);
}
void ChpSim::computeFanout ()
{
if (_savedc) {
_compute_used_variables (_savedc);
}
}
int ChpSim::_updatepc (int pc)
{
int joined;
_pc[pc] = _pc[pc]->completed(pc, _tot, &joined);
if (!_pc[pc]) {
#ifdef DUMP_ALL
printf (" [released slot %d (pcused now: %d)]", pc, _pcused-1);
#endif
Assert (_pcused > 0, "What?");
_holes[_pcused-1] = pc;
_pcused--;
}
if (joined) {
#ifdef DUMP_ALL
printf (" [joined #%d / %d %d]", pc, _pcused, _pc[pc]->wait);
#endif
}
#if 0
if (pc >= _pcused) {
ChpSimGraph *tmp = _pc[pc];
_pc[pc] = NULL;
for (int i=_pcused-1; i >= 0; i--) {
if (!_pc[i]) {
pc = i;
_pc[pc] = tmp;
tmp = NULL;
break;
}
}
Assert (tmp == NULL, "What?");
#ifdef DUMP_ALL
printf (" [pc-adjust %d]", pc);
#endif
}
#endif
return pc;
}
int ChpSim::_collect_sharedvars (Expr *e, int pc, int undo)
{
int ret = 0;
if (!e) return ret;
switch (e->type) {
case E_TRUE:
case E_FALSE:
case E_INT:
case E_REAL:
break;
/* binary */
case E_AND:
case E_OR:
case E_PLUS:
case E_MINUS:
case E_MULT:
case E_DIV:
case E_MOD:
case E_LSL:
case E_LSR:
case E_ASR:
case E_XOR:
case E_LT:
case E_GT:
case E_LE:
case E_GE:
case E_EQ:
case E_NE:
ret = ret | _collect_sharedvars (e->u.e.l, pc, undo);
ret = ret | _collect_sharedvars (e->u.e.r, pc, undo);
break;
case E_UMINUS:
case E_COMPLEMENT:
case E_NOT:
case E_BUILTIN_BOOL:
case E_BUILTIN_INT:
ret = ret | _collect_sharedvars (e->u.e.l, pc, undo);
break;
case E_QUERY:
ret = ret | _collect_sharedvars (e->u.e.l, pc, undo);
ret = ret | _collect_sharedvars (e->u.e.r->u.e.l, pc, undo);
ret = ret | _collect_sharedvars (e->u.e.r->u.e.r, pc, undo);
break;
case E_COLON:
case E_COMMA:
fatal_error ("Should have been handled elsewhere");
break;
case E_CONCAT:
do {
ret = ret | _collect_sharedvars (e->u.e.l, pc, undo);
e = e->u.e.r;
} while (e);
break;
case E_BITFIELD:
ret = ret | _collect_sharedvars (e->u.e.l, pc, undo);
break;
case E_CHP_BITFIELD:
if (((struct chpsimderef *)e->u.e.l)->offset < 0) {
ret = 1;
}
break;
case E_CHP_VARBOOL:
case E_CHP_VARINT:
case E_VAR:
// don't need to deal with shared variables here
// since this is pre-computed
case E_CHP_VARCHAN:
break;
case E_PROBE:
fatal_error ("What?");
break;
case E_PROBEIN:
case E_PROBEOUT:
{
int off = getGlobalOffset (e->u.x.val, 2);
act_channel_state *c = _sc->getChan (off);
if ((c->fragmented & 0x1) && e->type == E_PROBEOUT) {
return 1;
}
else if ((c->fragmented & 0x2) && e->type == E_PROBEIN) {
return 1;
}
if (undo) {
if (c->probe) {
#ifdef DUMP_ALL
printf (" [clr %d]", off);
#endif
if (!_probe) {
_probe = c->probe;
}
else {
if (_probe != c->probe) {
fatal_error ("Weird!");
}
}
if (c->probe->isWaiting (this)) {
c->probe->DelObject (this);
}
c->probe = NULL;
}
if (e->type == E_PROBEIN) {
if (c->receiver_probe) {
c->recv_here = 0;
c->receiver_probe = 0;
}
}
else {
if (c->sender_probe) {
c->send_here = 0;
c->sender_probe = 0;
}
}
}
else {
if (e->type == E_PROBEIN && !WAITING_SENDER(c)) {
#ifdef DUMP_ALL
printf (" [add %d]", off);
#endif
if (!_probe) {
_probe = new WaitForOne (0);
}
if (c->probe && c->probe != _probe) {
fatal_error ("Channel is being probed by multiple processes!");
}
c->probe = _probe;
if (!c->probe->isWaiting (this)) {
c->probe->AddObject (this);
}
c->recv_here = (pc+1);
c->receiver_probe = 1;
}
else if (e->type == E_PROBEOUT && !WAITING_RECEIVER(c)) {
#ifdef DUMP_ALL
printf (" [add %d]", off);
#endif
if (!_probe) {
_probe = new WaitForOne (0);
}
if (c->probe && c->probe != _probe) {
fatal_error ("Channel is being probed by multiple processes!");
}
c->probe = _probe;
if (!c->probe->isWaiting (this)) {
c->probe->AddObject (this);
}
c->send_here = (pc+1);
c->sender_probe = 1;
}
}
}
break;
case E_FUNCTION:
{
Expr *tmp;
tmp = e->u.fn.r;
while (tmp) {
ret = ret | _collect_sharedvars (tmp->u.e.l, pc, undo);
tmp = tmp->u.e.r;
}
}
break;
case E_SELF:
case E_SELF_ACK:
default:
fatal_error ("Unknown expression type %d\n", e->type);
break;
}
return ret;
}
/*-- returns 1 if there's a shared variable in the guard --*/
int ChpSim::_add_waitcond (chpsimcond *gc, int pc, int undo)
{
int ret = 0;
#ifdef DUMP_ALL
if (undo) {
printf (" [del-waits]");
}
else {
printf (" [add-waits]");
}
#endif
_probe = NULL;
while (gc) {
if (gc->g) {
ret = ret | _collect_sharedvars (gc->g, pc, undo);
}
gc = gc->next;
}
if (undo) {
if (_probe) {
delete _probe;
}
}
#ifdef DUMP_ALL
printf (" sh-var:%d", ret);
#endif
return ret;
}
int ChpSim::computeOffset (const struct chpsimderef *d)
{
if (!d->range) {
return d->offset;
}
for (int i=0; i < d->range->nDims(); i++) {
BigInt res = exprEval (d->chp_idx[i]);
d->idx[i] = res.getVal(0);
}
int x = d->range->Offset (d->idx);
if (x == -1) {
fprintf (stderr, "In: ");
if (getName()) {
getName()->Print (stderr);
}
fprintf (stderr, " [ %s ]\n", _proc ? _proc->getName() : "-global-");
fprintf (stderr, "\tAccessing index ");
for (int i=0; i < d->range->nDims(); i++) {
fprintf (stderr, "[%d]", d->idx[i]);
}
fprintf (stderr, " from ");
d->cx->toid()->Print (stderr);
fprintf (stderr, "\n");
fatal_error ("Array out of bounds!");
}
return d->offset + x;
}
void ChpSimGraph::printStmt (FILE *fp, Process *p)
{
act_connection *c;
int dy;
if (!stmt) {
fprintf (fp, "(null)");
return;
}
switch (stmt->type) {
case CHPSIM_FORK:
fprintf (fp, "concur-fork:");
for (int i=0; i < stmt->u.fork; i++) {
if (all[i]) {
fprintf (fp, " ");
all[i]->printStmt (fp, p);
}
}
break;
case CHPSIM_ASSIGN:
fprintf (fp, "assign: ");
if (!p) break;
c = state->getConnFromOffset (p, stmt->u.assign.d.offset,
(stmt->u.assign.isint ? 1 : 0),
&dy);
if (c) {
ActId *t = c->toid();
t->Print (fp);
delete t;
if (dy != -1) { fprintf (fp, "[]"); }
}
else {
fprintf (fp, "-?-");
}
break;
case CHPSIM_SEND:
fprintf (fp, "send: ");
if (!p) break;
c = state->getConnFromOffset (p, stmt->u.sendrecv.chvar, 3, &dy);
if (c) {
ActId *t = c->toid();
t->Print (fp);
delete t;
if (dy != -1) { fprintf (fp, "[]"); }
}
else {
fprintf (fp, "-?-");
}
break;
case CHPSIM_RECV:
fprintf (fp, "recv: ");
if (!p) break;
c = state->getConnFromOffset (p, stmt->u.sendrecv.chvar, 2, &dy);
if (c) {
ActId *t = c->toid();
t->Print (fp);
delete t;
if (dy != -1) { fprintf (fp, "[]"); }
}
else {
fprintf (fp, "-?-");
}
break;
case CHPSIM_FUNC:
fprintf (fp, "log");
break;
case CHPSIM_COND:
fprintf (fp, "cond: ");
break;
case CHPSIM_CONDARB:
fprintf (fp, "cond-arb: ");
break;
case CHPSIM_LOOP:
fprintf (fp, "loop: ");
break;
case CHPSIM_NOP:
fprintf (fp, "nop ");
break;
default:
fatal_error ("What?");
break;
}
}
static const char *_process_string (const char *s,
int *is_zero,
int *type,
int *width)
{
const char *stmp = s;
*is_zero = 0;
*type = 0;
*width = -1;
if (*stmp == '%') {
int idx = 1;
while (stmp[idx] >= '0' && stmp[idx] <= '9' && stmp[idx]) {
if (*width == -1) {
*width = stmp[idx] - '0';
}
else {
*width *= 10;
*width += stmp[idx] - '0';
}
idx++;
}
if (idx != 1) {
if (stmp[1] == '0') {
*is_zero = 1;
}
else {
*is_zero = 0;
}
}
if (stmp[idx]) {
if (stmp[idx] == 'x') {
*type = 2; /* hex */
stmp = stmp + idx + 1;
}
else if (stmp[idx] == 'd') {
*type = 1; /* signed */
stmp = stmp + idx + 1;
}
else if (stmp[idx] == 'u') {
*type = 0; /* default */
stmp = stmp + idx + 1;
}
else if (stmp[idx] == 'b') {
*type = 3; /* bits */
stmp = stmp + idx + 1;
}
else {
*is_zero = 0;
*type = 0;
*width = -1;
}
}
else {
*is_zero = 0;
*type = 0;
*width = -1;
}
}
else {
*is_zero = 0;
*type = 0;
*width = -1;
}
return stmp;
}
static void _process_print_int (BigInt &v,
int int_is_zero,
int int_type,
int int_width)
{
if (int_width == -1) {
if (int_type == 0) {
v.decPrint (actsim_log_fp());
//actsim_log ("%" ACT_EXPR_RES_PRINTF "u", v.getVal (0));
}
else if (int_type == 1) {
actsim_log ("%" ACT_EXPR_RES_PRINTF "d", v.getVal (0));
}
else if (int_type == 2) {
v.hexPrint (actsim_log_fp ());
}
else if (int_type == 3) {
v.bitPrint (actsim_log_fp ());
}
}
else {
if (int_type == 0) {
v.decPrint (actsim_log_fp());
#if 0
if (int_is_zero) {
actsim_log ("%0" ACT_EXPR_RES_PRINTF "*u", int_width, v.getVal (0));