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Don't evaluate built-in system functions if they are overridden.

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We don't support evaluating user-defined system functions at compile
time. If possible, defer evaluation until run time. If used in a
constant expression, output a "sorry" message.
This commit is contained in:
Martin Whitaker
2019-10-19 16:12:17 +01:00
parent bf655003e8
commit 1069a0ef02
9 changed files with 72 additions and 32 deletions
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net_expr.cc
+5 -5
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2002-2013 Stephen Williams ([email protected])
* Copyright (c) 2002-2019 Stephen Williams ([email protected])
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
@@ -461,15 +461,15 @@ bool NetESelect::has_width() const
}
NetESFunc::NetESFunc(const char*n, ivl_variable_type_t t,
unsigned width, unsigned np)
: name_(0), type_(t), enum_type_(0), parms_(np)
unsigned width, unsigned np, bool is_overridden)
: name_(0), type_(t), enum_type_(0), parms_(np), is_overridden_(is_overridden)
{
name_ = lex_strings.add(n);
expr_width(width);
}
NetESFunc::NetESFunc(const char*n, ivl_type_t rtype, unsigned np)
: NetExpr(rtype), name_(0), type_(IVL_VT_NO_TYPE), enum_type_(0), parms_(np)
: NetExpr(rtype), name_(0), type_(IVL_VT_NO_TYPE), enum_type_(0), parms_(np), is_overridden_(false)
{
name_ = lex_strings.add(n);
expr_width(rtype->packed_width());
@@ -485,7 +485,7 @@ NetESFunc::NetESFunc(const char*n, ivl_type_t rtype, unsigned np)
}
NetESFunc::NetESFunc(const char*n, const netenum_t*enum_type, unsigned np)
: name_(0), type_(enum_type->base_type()), enum_type_(enum_type), parms_(np)
: name_(0), type_(enum_type->base_type()), enum_type_(enum_type), parms_(np), is_overridden_(false)
{
name_ = lex_strings.add(n);
expr_width(enum_type->packed_width());