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Add (* gclk *) attribute support

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Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2018-06-01 13:25:42 +02:00
parent f273291dfe
commit 4372cf690d
4 changed files with 23 additions and 1 deletions
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9
frontends/ast/genrtlil.cc
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@ -223,12 +223,18 @@ struct AST_INTERNAL::ProcessGenerator
bool found_global_syncs = false;
bool found_anyedge_syncs = false;
for (auto child : always->children)
{
if ((child->type == AST_POSEDGE || child->type == AST_NEGEDGE) && GetSize(child->children) == 1 && child->children.at(0)->type == AST_IDENTIFIER &&
child->children.at(0)->id2ast && child->children.at(0)->id2ast->type == AST_WIRE && child->children.at(0)->id2ast->get_bool_attribute("\\gclk")) {
found_global_syncs = true;
}
if (child->type == AST_EDGE) {
if (GetSize(child->children) == 1 && child->children.at(0)->type == AST_IDENTIFIER && child->children.at(0)->str == "\\$global_clock")
found_global_syncs = true;
else
found_anyedge_syncs = true;
}
}
if (found_anyedge_syncs) {
if (found_global_syncs)
@ -242,6 +248,9 @@ struct AST_INTERNAL::ProcessGenerator
bool found_clocked_sync = false;
for (auto child : always->children)
if (child->type == AST_POSEDGE || child->type == AST_NEGEDGE) {
if (GetSize(child->children) == 1 && child->children.at(0)->type == AST_IDENTIFIER && child->children.at(0)->id2ast &&
child->children.at(0)->id2ast->type == AST_WIRE && child->children.at(0)->id2ast->get_bool_attribute("\\gclk"))
continue;
found_clocked_sync = true;
if (found_global_syncs || found_anyedge_syncs)
log_error("Found non-synthesizable event list at %s:%d!\n", always->filename.c_str(), always->linenum);