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/********************* */
/*! \file word.cpp
** \verbatim
** Top contributors (to current version):
** Dejan Jovanovic, Tim King, Morgan Deters
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/
/*
* word.cpp
*
* Created on: Jul 13, 2012
* Author: dejan
*/
#include "word.h"
#include <vector>
#include <cvc4/cvc4.h>
#include <cvc4/expr/expr_iomanip.h>
#include <cvc4/options/language.h>
#include <cvc4/options/options.h>
using namespace std;
using namespace hashsmt;
using namespace CVC4;
using namespace CVC4::options;
Expr Word::extendToSize(unsigned newSize) const {
if (newSize <= size()) {
return d_expr;
} else {
// 0-extend to size
Expr extendOp = em()->mkConst(BitVectorZeroExtend(newSize - size()));
return em()->mkExpr(extendOp, d_expr);
}
}
ExprManager* Word::s_manager = 0;
ExprManager* Word::em() {
if (s_manager == 0) {
CVC4::Options options;
options.setInputLanguage(language::input::LANG_SMTLIB_V2);
options.setOutputLanguage(language::output::LANG_SMTLIB_V2);
s_manager = new CVC4::ExprManager(options);
}
return s_manager;
}
Expr Word::operator == (const Word& b) const {
return em()->mkExpr(kind::EQUAL, d_expr, b.getExpr());
}
Word Word::concat(const Word words[], unsigned size) {
Expr concat = words[0].d_expr;
for(unsigned i = 1; i < size; ++i) {
concat = em()->mkExpr(kind::BITVECTOR_CONCAT, concat, words[i].d_expr);
}
return Word(concat);
}
void Word::print(ostream& out) const {
out << CVC4::expr::ExprSetDepth(-1) << d_expr;
}
Word::Word(unsigned newSize, unsigned value) {
d_expr = em()->mkConst(BitVector(newSize, value));
};
Word::Word(unsigned newSize, string name) {
d_expr = em()->mkVar(name, em()->mkBitVectorType(newSize));
};
Word& Word::operator = (const Word& b) {
d_expr = b.d_expr;
return *this;
}
Word Word::operator + (const Word& b) const {
unsigned newSize = std::max(size(), b.size());
Expr lhs = extendToSize(newSize);
Expr rhs = b.extendToSize(newSize);
return em()->mkExpr(kind::BITVECTOR_PLUS, lhs, rhs);
}
Word& Word::operator += (const Word& b) {
(*this) = (*this) + b;
return (*this);
}
Word Word::operator ~ () const {
return em()->mkExpr(kind::BITVECTOR_NOT, d_expr);
}
Word Word::operator & (const Word& b) const {
unsigned newSize = std::max(size(), b.size());
Expr lhs = extendToSize(newSize);
Expr rhs = b.extendToSize(newSize);
return em()->mkExpr(kind::BITVECTOR_AND, lhs, rhs);
}
Word Word::operator | (const Word& b) const {
unsigned newSize = std::max(size(), b.size());
Expr lhs = extendToSize(newSize);
Expr rhs = b.extendToSize(newSize);
return em()->mkExpr(kind::BITVECTOR_OR, lhs, rhs);
}
Word& Word::operator |= (const Word& b) {
(*this) = (*this) | b;
return (*this);
}
Word Word::operator ^ (const Word& b) const {
unsigned newSize = std::max(size(), b.size());
Expr lhs = extendToSize(newSize);
Expr rhs = b.extendToSize(newSize);
return em()->mkExpr(kind::BITVECTOR_XOR, lhs, rhs);
}
Word Word::operator << (unsigned amount) const {
// Instead of shifting we just add zeroes, to ensure that ((char)x << 24) return 32 bits
Word padding(amount, 0);
return em()->mkExpr(kind::BITVECTOR_CONCAT, d_expr, padding.d_expr);
}
Word Word::operator >> (unsigned amount) const {
Word shiftAmount(size(), amount);
return em()->mkExpr(kind::BITVECTOR_LSHR, d_expr, shiftAmount.d_expr);
}
unsigned Word::size() const {
BitVectorType type = d_expr.getType();
return type.getSize();
}
cvc4_uint32::cvc4_uint32(const Word& b) {
if (b.size() > 32) {
// Extract the first 32 bits
Expr extractOp = em()->mkConst(BitVectorExtract(31, 0));
d_expr = em()->mkExpr(extractOp, b.getExpr());
} else if (b.size() < 32) {
// 0-extend to 32 bits
Expr extendOp = em()->mkConst(BitVectorZeroExtend(32 - b.size()));
d_expr = em()->mkExpr(extendOp, b.getExpr());
} else {
d_expr = b.getExpr();
}
}
cvc4_uchar8::cvc4_uchar8(const Word& b) {
if (b.size() > 8) {
// Extract the first 8 bits
Expr extractOp = em()->mkConst(BitVectorExtract(7, 0));
d_expr = em()->mkExpr(extractOp, b.getExpr());
} else if (b.size() < 8) {
// 0-extend to 8 bits
Expr extendOp = em()->mkConst(BitVectorZeroExtend(8 - b.size()));
d_expr = em()->mkExpr(extendOp, b.getExpr());
} else {
d_expr = b.getExpr();
}
}
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