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Carry mux output delays.

This commit is contained in:
steve 2002-08-21 02:28:03 +00:00
parent d2ac85e2c7
commit 63f97d8ec6
1 changed files with 32 additions and 2 deletions
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34
elab_net.cc
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: elab_net.cc,v 1.96 2002/08/14 03:57:27 steve Exp $"
#ident "$Id: elab_net.cc,v 1.97 2002/08/21 02:28:03 steve Exp $"
#endif
# include "config.h"
@ -1859,12 +1859,39 @@ NetNet* PETernary::elaborate_net(Design*des, NetScope*scope,
NetMux*mux = new NetMux(scope, scope->local_hsymbol(), dwidth, 2, 1);
connect(mux->pin_Sel(0), expr_sig->pin(0));
/* Connect the data inputs. */
for (unsigned idx = 0 ; idx < dwidth ; idx += 1) {
connect(mux->pin_Result(idx), sig->pin(idx));
connect(mux->pin_Data(idx,0), fal_sig->pin(idx));
connect(mux->pin_Data(idx,1), tru_sig->pin(idx));
}
/* If there are non-zero output delays, then create bufz
devices to carry the propagation delays. Otherwise, just
connect the result to the output. */
if (rise || fall || decay) {
NetNet*tmp = new NetNet(scope, scope->local_hsymbol(),
NetNet::WIRE, dwidth);
for (unsigned idx = 0 ; idx < dwidth ; idx += 1) {
NetBUFZ*tmpz = new NetBUFZ(scope, scope->local_hsymbol());
tmpz->rise_time(rise);
tmpz->fall_time(fall);
tmpz->decay_time(decay);
tmpz->pin(0).drive0(drive0);
tmpz->pin(0).drive1(drive1);
connect(mux->pin_Result(idx), tmp->pin(idx));
connect(tmp->pin(idx), tmpz->pin(1));
connect(sig->pin(idx), tmpz->pin(0));
des->add_node(tmpz);
}
} else {
for (unsigned idx = 0 ; idx < dwidth ; idx += 1) {
connect(mux->pin_Result(idx), sig->pin(idx));
}
}
/* If the MUX device result is too narrow to fill out the
desired result, pad with zeros by creating a NetConst device. */
@ -2134,6 +2161,9 @@ NetNet* PEUnary::elaborate_net(Design*des, NetScope*scope,
/*
* $Log: elab_net.cc,v $
* Revision 1.97 2002/08/21 02:28:03 steve
* Carry mux output delays.
*
* Revision 1.96 2002/08/14 03:57:27 steve
* Constants can self-size themselves in unsized contexts.
*