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Handle some tricky conditions assignments to parts.

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When for example assigning to foo[<x>] within a contitional, and
doing synthesis, we need to create a NetSubstitute device to manage
the l-value bit selects.
This commit is contained in:
Stephen Williams
2014-07-14 16:46:58 -07:00
parent c1e533d484
commit d5fb0f4344
24 changed files with 499 additions and 51 deletions
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t-dll.cc
+26
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@@ -1100,6 +1100,32 @@ bool dll_target::tran(const NetTran*net)
return true;
}
bool dll_target::substitute(const NetSubstitute*net)
{
ivl_lpm_t obj = new struct ivl_lpm_s;
obj->type = IVL_LPM_SUBSTITUTE;
obj->name = net->name();
assert(net->scope());
obj->scope = find_scope(des_, net->scope());
assert(obj->scope);
FILE_NAME(obj, net);
obj->width = net->width();
obj->u_.substitute.base = net->base();
obj->u_.substitute.q = net->pin(0).nexus()->t_cookie();
obj->u_.substitute.a = net->pin(1).nexus()->t_cookie();
obj->u_.substitute.s = net->pin(2).nexus()->t_cookie();
nexus_lpm_add(obj->u_.substitute.q, obj, 0, IVL_DR_STRONG, IVL_DR_STRONG);
nexus_lpm_add(obj->u_.substitute.a, obj, 0, IVL_DR_HiZ, IVL_DR_HiZ);
nexus_lpm_add(obj->u_.substitute.s, obj, 0, IVL_DR_HiZ, IVL_DR_HiZ);
make_lpm_delays_(obj, net);
scope_add_lpm(obj->scope, obj);
return true;
}
bool dll_target::sign_extend(const NetSignExtend*net)
{
struct ivl_lpm_s*obj = new struct ivl_lpm_s;