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

synthesis for NetEBitSel.

This commit is contained in:
steve 2006-06-14 03:02:54 +00:00
parent 9d028a63f2
commit 3877b636df
2 changed files with 47 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
expr_synth.cc
View File

@ -17,12 +17,13 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: expr_synth.cc,v 1.59.2.6 2006/06/12 00:16:52 steve Exp $"
#ident "$Id: expr_synth.cc,v 1.59.2.7 2006/06/14 03:02:54 steve Exp $"
#endif
# include "config.h"
# include <iostream>
# include <typeinfo>
# include "netlist.h"
# include "netmisc.h"
@ -32,11 +33,48 @@ NetNet* NetExpr::synthesize(Design*des)
{
cerr << get_line() << ": internal error: cannot synthesize expression: "
<< *this << endl;
cerr << get_line() << ": : typeid="
<< typeid(*this).name() << endl;
des->errors += 1;
return 0;
}
/*
* For the NetEBitSel expression, create a NetMux node that selects a
* bit from the input.
*/
NetNet* NetEBitSel::synthesize(Design*des)
{
NetNet*net = sig_->synthesize(des);
assert(net);
NetNet*adr = idx_->synthesize(des);
if (adr == 0)
return 0;
NetScope*scope = adr->scope();
NetNet*osig = new NetNet(scope, scope->local_symbol(),
NetNet::WIRE, 1);
osig->set_line(*this);
osig->local_flag(true);
NetMux*mux = new NetMux(scope, scope->local_symbol(),
1, net->pin_count(), adr->pin_count());
des->add_node(mux);
for (unsigned idx = 0 ; idx < net->pin_count() ; idx += 1)
connect(mux->pin_Data(0, idx), net->pin(idx));
for (unsigned idx = 0 ; idx < adr->pin_count() ; idx += 1)
connect(mux->pin_Sel(idx), adr->pin(idx));
connect(mux->pin_Result(0), osig->pin(0));
return osig;
}
/*
* Make an LPM_ADD_SUB device from addition operators.
*/
@ -950,6 +988,9 @@ NetNet* NetESignal::synthesize(Design*des)
/*
* $Log: expr_synth.cc,v $
* Revision 1.59.2.7 2006/06/14 03:02:54 steve
* synthesis for NetEBitSel.
*
* Revision 1.59.2.6 2006/06/12 00:16:52 steve
* Add support for -Wunused warnings.
*

6
netlist.h
View File

@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: netlist.h,v 1.321.2.17 2006/04/23 04:26:14 steve Exp $"
#ident "$Id: netlist.h,v 1.321.2.18 2006/06/14 03:02:54 steve Exp $"
#endif
/*
@ -3175,6 +3175,7 @@ class NetEBitSel : public NetExpr {
const NetNet* sig() const;
NetEBitSel* dup_expr() const;
NetNet* synthesize(Design*des);
virtual NexusSet* nex_input();
virtual void expr_scan(struct expr_scan_t*) const;
@ -3528,6 +3529,9 @@ extern ostream& operator << (ostream&, NetNet::Type);
/*
* $Log: netlist.h,v $
* Revision 1.321.2.18 2006/06/14 03:02:54 steve
* synthesis for NetEBitSel.
*
* Revision 1.321.2.17 2006/04/23 04:26:14 steve
* Constant propagate addresses through NetRamDq read ports.
*