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Add XNF support for NE comparators.

This commit is contained in:
steve 2000-11-29 02:54:49 +00:00
parent 291ab97422
commit 4bf3e37af3
1 changed files with 30 additions and 6 deletions
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36
t-xnf.cc
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: t-xnf.cc,v 1.37 2000/11/29 01:34:17 steve Exp $"
#ident "$Id: t-xnf.cc,v 1.38 2000/11/29 02:54:49 steve Exp $"
#endif
/* XNF BACKEND
@ -539,7 +539,7 @@ void target_xnf::lpm_add_sub(const NetAddSub*gate)
*/
void target_xnf::lpm_compare(const NetCompare*dev)
{
if (dev->pin_AEB().is_linked()) {
if (dev->pin_AEB().is_linked() || dev->pin_ANEB().is_linked()) {
lpm_compare_eq_(out_, dev);
return;
}
@ -611,8 +611,20 @@ void target_xnf::lpm_compare_eq_(ostream&os, const NetCompare*dev)
os << "END" << endl;
}
os << "SYM, " << mname << ", AND, LIBVER=2.0.0" << endl;
draw_pin(os, "O", dev->pin_AEB());
/* Draw an AND gate if this is an EQ result, or a NAND
gate of this is a NEQ result. */
if (dev->pin_AEB().is_linked()) {
assert( ! dev->pin_ANEB().is_linked());
os << "SYM, " << mname << ", AND, LIBVER=2.0.0" << endl;
draw_pin(os, "O", dev->pin_AEB());
} else {
assert( dev->pin_ANEB().is_linked());
os << "SYM, " << mname << ", NAND, LIBVER=2.0.0" << endl;
draw_pin(os, "O", dev->pin_ANEB());
}
for (unsigned idx = 0 ; idx < dev->width() ; idx += 5) {
if ((idx+1) == dev->width())
os << " PIN, I" << idx/5 << ", I, " << mname
@ -624,8 +636,17 @@ void target_xnf::lpm_compare_eq_(ostream&os, const NetCompare*dev)
os << "END" << endl;
} else {
os << "SYM, " << mname << ", AND, LIBVER=2.0.0" << endl;
draw_pin(os, "O", dev->pin_AEB());
if (dev->pin_AEB().is_linked()) {
assert( ! dev->pin_ANEB().is_linked());
os << "SYM, " << mname << ", AND, LIBVER=2.0.0" << endl;
draw_pin(os, "O", dev->pin_AEB());
} else {
assert( dev->pin_ANEB().is_linked());
os << "SYM, " << mname << ", NAND, LIBVER=2.0.0" << endl;
draw_pin(os, "O", dev->pin_ANEB());
}
for (unsigned idx = 0 ; idx < dev->width() ; idx += 1) {
os << " PIN, I" << idx << ", I, " << mname << "/bit<"
<< idx << ">" << endl;
@ -887,6 +908,9 @@ extern const struct target tgt_xnf = { "xnf", &target_xnf_obj };
/*
* $Log: t-xnf.cc,v $
* Revision 1.38 2000/11/29 02:54:49 steve
* Add XNF support for NE comparators.
*
* Revision 1.37 2000/11/29 01:34:17 steve
* Typo writing I pins to AND gates in compare.
*