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V0.9: Fail if the user defines a real variable as a vector. 

Using reg real [1:0] var you can define a real variable with a
range. This was crashing the run time. This patch catches this
in the compiler and prints an appropriate message.
This commit is contained in:
Cary R 2010-11-18 20:59:10 -08:00 committed by Stephen Williams
parent 8c1b5be360
commit 3f7d635afd
1 changed files with 16 additions and 3 deletions
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19
elab_sig.cc
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000-2009 Stephen Williams (steve@icarus.com)
* Copyright (c) 2000-2010 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
@ -1119,6 +1119,17 @@ NetNet* PWire::elaborate_sig(Design*des, NetScope*scope) const
array_dimensions = 1;
}
if (data_type_ == IVL_VT_REAL && (msb != 0 || lsb != 0)) {
cerr << get_fileline() << ": error: real ";
if (wtype == NetNet::REG) cerr << "variable";
else cerr << "net";
cerr << " '" << name_
<< "' cannot be declared as a vector, found a range ["
<< msb << ":" << lsb << "]." << endl;
des->errors += 1;
return 0;
}
/* If the net type is supply0 or supply1, replace it
with a simple wire with a pulldown/pullup with supply
strength. In other words, transform:
@ -1148,8 +1159,10 @@ NetNet* PWire::elaborate_sig(Design*des, NetScope*scope) const
if (debug_elaborate) {
cerr << get_fileline() << ": debug: "
<< "Generate a SUPPLY pulldown for the "
<< "supply0 net." << endl;
<< "Generate a SUPPLY pull for the ";
if (wtype == NetNet::SUPPLY0) cerr << "supply0";
else cerr << "supply1";
cerr << " net." << endl;
}
}