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Join cell0 and cell1 instances in LPM target.

This commit is contained in:
steve 2005-08-25 18:52:32 +00:00
parent 53156793fe
commit 5f6027fb66
1 changed files with 27 additions and 11 deletions
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38
tgt-fpga/d-lpm.c
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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: d-lpm.c,v 1.12 2004/10/04 01:10:56 steve Exp $"
#ident "$Id: d-lpm.c,v 1.12.2.1 2005/08/25 18:52:32 steve Exp $"
#endif
/*
@ -804,9 +804,19 @@ static void lpm_show_mult(ivl_lpm_t net)
static void lpm_show_constant(ivl_net_const_t net)
{
/* We only need one instance each of constant 0 and 1 bits. If
we need either of them, then create an instance reference and
save that reference here so that later needs for 0 or 1 can
find that the reference already lives and can be added to the
joint. */
static edif_cellref_t cell0_ref = 0;
static edif_cellref_t cell1_ref = 0;
static edif_joint_t cell0_jnt = 0;
static edif_joint_t cell1_jnt = 0;
edif_cell_t cell0 = edif_xlibrary_findcell(xlib, "cell0");
edif_cell_t cell1 = edif_xlibrary_findcell(xlib, "cell1");
edif_cellref_t ref0 = 0, ref1 = 0;
const char*bits;
unsigned idx;
@ -832,23 +842,26 @@ static void lpm_show_constant(ivl_net_const_t net)
bits = ivl_const_bits(net);
for (idx = 0 ; idx < ivl_const_pins(net) ; idx += 1) {
if (bits[idx] == '1') {
if (ref1 == 0)
ref1 = edif_cellref_create(edf, cell1);
if (cell1_ref == 0) {
cell1_ref = edif_cellref_create(edf, cell1);
cell1_jnt = edif_joint_create(edf);
edif_add_to_joint(cell1_jnt, cell1_ref, 0);
}
} else {
if (ref0 == 0)
ref0 = edif_cellref_create(edf, cell0);
if (cell0_ref == 0) {
cell0_ref = edif_cellref_create(edf, cell0);
cell0_jnt = edif_joint_create(edf);
edif_add_to_joint(cell0_jnt, cell0_ref, 0);
}
}
}
for (idx = 0 ; idx < ivl_const_pins(net) ; idx += 1) {
edif_joint_t jnt;
jnt = edif_joint_of_nexus(edf, ivl_const_pin(net,idx));
if (bits[idx] == '1')
edif_add_to_joint(jnt, ref1, 0);
edif_nexus_to_joint(edf, cell1_jnt, ivl_const_pin(net,idx));
else
edif_add_to_joint(jnt, ref0, 0);
edif_nexus_to_joint(edf, cell0_jnt, ivl_const_pin(net,idx));
}
}
@ -876,6 +889,9 @@ const struct device_s d_lpm_edif = {
/*
* $Log: d-lpm.c,v $
* Revision 1.12.2.1 2005/08/25 18:52:32 steve
* Join cell0 and cell1 instances in LPM target.
*
* Revision 1.12 2004/10/04 01:10:56 steve
* Clean up spurious trailing white space.
*