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Various fixes for correct parameter support

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This commit is contained in:
Clifford Wolf 2013-11-07 09:58:15 +01:00
parent 160adccca2
commit f050c40519
4 changed files with 102 additions and 41 deletions
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25
frontends/ast/simplify.cc
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@ -197,6 +197,18 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
child_0_is_self_determined = true;
break;
case AST_PARAMETER:
case AST_LOCALPARAM:
children[0]->detectSignWidth(width_hint, sign_hint);
if (children.size() > 1) {
assert(children[1]->type == AST_RANGE);
while (children[1]->simplify(false, false, false, stage, -1, false) == true) { }
if (!children[1]->range_valid)
log_error("Non-constant width range on parameter decl at %s:%d.\n", filename.c_str(), linenum);
width_hint = std::max(width_hint, children[1]->range_left - children[1]->range_right + 1);
}
break;
case AST_TO_SIGNED:
case AST_TO_UNSIGNED:
case AST_CONCAT:
@ -419,6 +431,19 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
}
}
// trim/extend parameters
if ((type == AST_PARAMETER || type == AST_LOCALPARAM) && children[0]->type == AST_CONSTANT && children.size() > 1) {
if (!children[1]->range_valid)
log_error("Non-constant width range on parameter decl at %s:%d.\n", filename.c_str(), linenum);
int width = children[1]->range_left - children[1]->range_right + 1;
if (width != int(children[0]->bits.size())) {
RTLIL::SigSpec sig(children[0]->bits);
sig.extend(width, children[0]->is_signed);
delete children[0];
children[0] = mkconst_bits(sig.as_const().bits, children[0]->is_signed);
}
}
// annotate identifiers using scope resolution and create auto-wires as needed
if (type == AST_IDENTIFIER) {
if (current_scope.count(str) == 0) {