public static string BvExtractOpName(VCExprNAry node)
{
Contract.Requires(node != null);
Contract.Requires(node.Op is VCExprBvExtractOp);
Contract.Ensures(Contract.Result <string>() != null);
VCExprBvExtractOp op = (VCExprBvExtractOp)node.Op;
return("$bv" + node.Type.BvBits + "_extract" + op.Total + "[" + op.Start + ":" + op.End + "]");
}
public Term VisitBvExtractOp(VCExprNAry node, LineariserOptions options)
{
Contract.Requires(options != null);
Contract.Requires(node != null);
VCExprBvExtractOp op = (VCExprBvExtractOp)node.Op;
Contract.Assert(op != null);
System.Diagnostics.Debug.Assert(0 <= op.Start && op.Start < op.End);
List <Term> args = new List <Term>();
foreach (VCExpr e in node)
{
Contract.Assert(e != null);
args.Add(ExprLineariser.Linearise(e, options));
}
System.Diagnostics.Debug.Assert(args.Count == 1);
return(ExprLineariser.cm.z3.MkBvExtract((uint)op.End - 1, (uint)op.Start, args[0]));
}
