public virtual Expr BVSUB(Expr lhs, Expr rhs)
{
return(UB.BVSUB(lhs, rhs));
}
protected Expr HandleBvBuiltIns(FunctionCall fc, string builtin, List <Expr> newArgs)
{
Debug.Assert(builtin.Length > 0);
// We grab for first word because the bvbuiltin
// might be "zeroextend 16", we don't care about the number
string firstWord = builtin.Split(' ')[0];
Debug.Assert(firstWord.Length > 0);
// Handle `(_ zero_extend x)` and `(_ sign_extend x)` style builtins
if (firstWord.StartsWith("(_"))
{
var words = builtin.Split(' ');
if (words.Length < 2)
{
throw new ArgumentException("Malformed bvbuiltin name \"" + builtin + "\"");
}
firstWord = words[1];
}
int retWidth = 0;
switch (firstWord)
{
// arithmetic
case "bvadd":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVADD(newArgs[0], newArgs[1]));
case "bvsub":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVSUB(newArgs[0], newArgs[1]));
case "bvmul":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVMUL(newArgs[0], newArgs[1]));
case "bvudiv":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVUDIV(newArgs[0], newArgs[1]));
case "bvurem":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVUREM(newArgs[0], newArgs[1]));
case "bvsdiv":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVSDIV(newArgs[0], newArgs[1]));
case "bvsrem":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVSREM(newArgs[0], newArgs[1]));
case "bvsmod":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVSMOD(newArgs[0], newArgs[1]));
case "sign_extend":
Debug.Assert(newArgs.Count == 1);
Debug.Assert(fc.Func.OutParams.Count == 1);
retWidth = fc.Func.OutParams[0].TypedIdent.Type.BvBits;
return(Builder.BVSEXT(newArgs[0], retWidth));
case "zero_extend":
Debug.Assert(newArgs.Count == 1);
Debug.Assert(fc.Func.OutParams.Count == 1);
retWidth = fc.Func.OutParams[0].TypedIdent.Type.BvBits;
return(Builder.BVZEXT(newArgs[0], retWidth));
case "bvneg":
Debug.Assert(newArgs.Count == 1);
return(Builder.BVNEG(newArgs[0]));
// bitwise logical
case "bvand":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVAND(newArgs[0], newArgs[1]));
case "bvor":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVOR(newArgs[0], newArgs[1]));
case "bvnot":
Debug.Assert(newArgs.Count == 1);
return(Builder.BVNOT(newArgs[0]));
case "bvxor":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVXOR(newArgs[0], newArgs[1]));
// shift
case "bvshl":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVSHL(newArgs[0], newArgs[1]));
case "bvlshr":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVLSHR(newArgs[0], newArgs[1]));
case "bvashr":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVASHR(newArgs[0], newArgs[1]));
// Comparison
case "bvult":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVULT(newArgs[0], newArgs[1]));
case "bvule":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVULE(newArgs[0], newArgs[1]));
case "bvugt":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVUGT(newArgs[0], newArgs[1]));
case "bvuge":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVUGE(newArgs[0], newArgs[1]));
case "bvslt":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVSLT(newArgs[0], newArgs[1]));
case "bvsle":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVSLE(newArgs[0], newArgs[1]));
case "bvsgt":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVSGT(newArgs[0], newArgs[1]));
case "bvsge":
Debug.Assert(newArgs.Count == 2);
return(Builder.BVSGE(newArgs[0], newArgs[1]));
default:
throw new NotImplementedException("\"" + firstWord + "\" bvbuiltin not supported!");
}
}