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Convert real array index to integer. 

This patch converts a constant real index to an integer value when
defining an array. This can happen when using 2**8 which returns a
real value since the operands are signed.
This commit is contained in:
Cary R 2008-02-27 15:01:09 -08:00 committed by Stephen Williams
parent 70c5c9fe14
commit f8caebd076
1 changed files with 34 additions and 11 deletions
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45
elab_sig.cc
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000-2007 Stephen Williams (steve@icarus.com)
* Copyright (c) 2000-2008 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
@ -35,6 +35,32 @@
# include "util.h"
# include "ivl_assert.h"
static bool get_const_argument(NetExpr*exp, verinum&res)
{
switch (exp->expr_type()) {
case IVL_VT_REAL: {
NetECReal*cv = dynamic_cast<NetECReal*>(exp);
if (cv == 0) return false;
verireal tmp = cv->value();
res = verinum(tmp.as_long());
break;
}
case IVL_VT_BOOL:
case IVL_VT_LOGIC: {
NetEConst*cv = dynamic_cast<NetEConst*>(exp);
if (cv == 0) return false;
res = cv->value();
break;
}
default:
assert(0);;
}
return true;
}
void Statement::elaborate_sig(Design*des, NetScope*scope) const
{
}
@ -715,10 +741,14 @@ NetNet* PWire::elaborate_sig(Design*des, NetScope*scope) const
return 0;
}
NetEConst*lcon = dynamic_cast<NetEConst*> (lexp);
NetEConst*rcon = dynamic_cast<NetEConst*> (rexp);
bool const_flag = true;
verinum lval, rval;
const_flag &= get_const_argument(lexp, lval);
const_flag &= get_const_argument(rexp, rval);
delete rexp;
delete lexp;
if ((lcon == 0) || (rcon == 0)) {
if (!const_flag) {
cerr << get_fileline() << ": internal error: The indices "
<< "are not constant for array ``"
<< name_ << "''." << endl;
@ -726,12 +756,6 @@ NetNet* PWire::elaborate_sig(Design*des, NetScope*scope) const
return 0;
}
verinum lval = lcon->value();
verinum rval = rcon->value();
delete lexp;
delete rexp;
array_dimensions = 1;
array_s0 = lval.as_long();
array_e0 = rval.as_long();
@ -807,4 +831,3 @@ NetNet* PWire::elaborate_sig(Design*des, NetScope*scope) const
return sig;
}