luke
/
iverilog
mirror of https://github.com/steveicarus/iverilog.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Handle concatenations in l-values.

This commit is contained in:
steve 2005-12-10 04:26:32 +00:00
parent d5d03812cd
commit f50f06ab4e
1 changed files with 43 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
synth2.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: synth2.cc,v 1.39.2.7 2005/12/10 03:30:51 steve Exp $"
#ident "$Id: synth2.cc,v 1.39.2.8 2005/12/10 04:26:32 steve Exp $"
#endif
# include "config.h"
@ -105,39 +105,50 @@ bool NetAssignBase::synth_async(Design*des, NetScope*scope,
const NetNet*nex_map, NetNet*nex_out,
NetNet*accum_in)
{
DEBUG_SYNTH2_ENTRY("NetAssignBase")
NetNet*rsig = rval_->synthesize(des);
assert(rsig);
NetNet*lsig = lval_->sig();
if (!lsig) {
cerr << get_line() << ": error: NetAssignBase::synth_async on unsupported lval ";
#if 0
if (lval_->more) {
cerr << get_line() << ": internal error: I do not know how "
<< "to support this l-value concatenation: ";
dump_lval(cerr);
cerr << endl;
DEBUG_SYNTH2_EXIT("NetAssignBase",false)
return false;
}
assert(lval_->more == 0);
#endif
unsigned roff = 0;
for (NetAssign_*cur = lval_ ; cur ; cur = cur->more) {
NetNet*lsig = cur->sig();
if (!lsig) {
cerr << get_line() << ": error: NetAssignBase::synth_async "
"on unsupported lval ";
dump_lval(cerr);
cerr << endl;
return false;
}
/* Bind the outputs that we do make to the nex_out. Use the
nex_map to map the l-value bit position to the nex_out bit
position. */
for (unsigned idx = 0 ; idx < lval_->lwidth() ; idx += 1) {
unsigned off = lval_->get_loff()+idx;
for (unsigned idx = 0 ; idx < cur->lwidth() ; idx += 1) {
unsigned off = cur->get_loff()+idx;
unsigned ptr = find_nexus_in_set(nex_map, lsig->pin(off).nexus());
assert(ptr <= nex_map->pin_count());
connect(nex_out->pin(ptr), rsig->pin(idx));
connect(nex_out->pin(ptr), rsig->pin(roff+idx));
}
roff += cur->lwidth();
/* This lval_ represents a reg that is a WIRE in the
synthesized results. This function signals the destructor
to change the REG that this l-value refers to into a
WIRE. It is done then, at the last minute, so that pending
synthesis can continue to work with it as a WIRE. */
lval_->turn_sig_to_wire_on_release();
cur->turn_sig_to_wire_on_release();
}
DEBUG_SYNTH2_EXIT("NetAssignBase",true)
return true;
}
@ -913,6 +924,10 @@ bool NetCondit::synth_sync(Design*des, NetScope*scope, NetFF*ff,
tmp.set(bit, asig->pin(bit).nexus()->driven_value());
}
if (! tmp.is_defined())
cerr << get_line() << ": internal error: "
<< "Strange clr r-value=" << tmp << endl;
assert(tmp.is_defined());
if (tmp.is_zero()) {
connect(ff->pin_Sclr(), rst->pin(0));
@ -1196,6 +1211,9 @@ void synth2(Design*des)
/*
* $Log: synth2.cc,v $
* Revision 1.39.2.8 2005/12/10 04:26:32 steve
* Handle concatenations in l-values.
*
* Revision 1.39.2.7 2005/12/10 03:30:51 steve
* Fix crash on block with assignments that assign lval to self.
*