109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
// OpenSTA, Static Timing Analyzer
|
|
// Copyright (c) 2019, Parallax Software, Inc.
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
#ifndef STA_FUNC_EXPR_H
|
|
#define STA_FUNC_EXPR_H
|
|
|
|
#include "DisallowCopyAssign.hh"
|
|
#include "Set.hh"
|
|
#include "NetworkClass.hh"
|
|
#include "LibertyClass.hh"
|
|
|
|
namespace sta {
|
|
|
|
class FuncExpr
|
|
{
|
|
public:
|
|
enum Operator {op_port,
|
|
op_not,
|
|
op_or,
|
|
op_and,
|
|
op_xor,
|
|
op_one,
|
|
op_zero};
|
|
|
|
// Constructors.
|
|
static FuncExpr *makePort(LibertyPort *port);
|
|
static FuncExpr *makeNot(FuncExpr *expr);
|
|
static FuncExpr *makeAnd(FuncExpr *left,
|
|
FuncExpr *right);
|
|
static FuncExpr *makeOr(FuncExpr *left,
|
|
FuncExpr *right);
|
|
static FuncExpr *makeXor(FuncExpr *left,
|
|
FuncExpr *right);
|
|
static FuncExpr *makeZero();
|
|
static FuncExpr *makeOne();
|
|
static bool equiv(const FuncExpr *expr1,
|
|
const FuncExpr *expr2);
|
|
static bool less(const FuncExpr *expr1,
|
|
const FuncExpr *expr2);
|
|
|
|
// Delete expression and all of its subexpressions.
|
|
void deleteSubexprs();
|
|
LibertyPort *port() const;
|
|
Operator op() const { return op_; }
|
|
// When operator is NOT left is the only operand.
|
|
FuncExpr *left() const { return left_; }
|
|
FuncExpr *right() const { return right_; }
|
|
TimingSense portTimingSense(const LibertyPort *port) const;
|
|
// Return true if expression has port as an input.
|
|
bool hasPort(const LibertyPort *port) const;
|
|
const char *asString() const;
|
|
// Sub expression for a bus function (bit_offset is 0 to bus->size()-1).
|
|
FuncExpr *bitSubExpr(int bit_offset);
|
|
// Check to make sure the function and port size are compatible.
|
|
// Return true if there is a mismatch.
|
|
bool checkSize(size_t size);
|
|
bool checkSize(LibertyPort *port);
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(FuncExpr);
|
|
FuncExpr(Operator op,
|
|
FuncExpr *left,
|
|
FuncExpr *right,
|
|
LibertyPort *port);
|
|
const char *asString(bool with_parens) const;
|
|
const char *asStringSubexpr(bool with_parens,
|
|
char op) const;
|
|
|
|
Operator op_;
|
|
FuncExpr *left_;
|
|
FuncExpr *right_;
|
|
LibertyPort *port_;
|
|
};
|
|
|
|
// Negate an expression.
|
|
FuncExpr *
|
|
funcExprNot(FuncExpr *expr);
|
|
|
|
class FuncExprPortIterator : public Iterator<LibertyPort*>
|
|
{
|
|
public:
|
|
explicit FuncExprPortIterator(FuncExpr *expr);
|
|
virtual bool hasNext() { return iter_.hasNext(); }
|
|
virtual LibertyPort *next() { return iter_.next(); }
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(FuncExprPortIterator);
|
|
void findPorts(FuncExpr *expr);
|
|
|
|
LibertyPortSet ports_;
|
|
LibertyPortSet::ConstIterator iter_;
|
|
};
|
|
|
|
} // namespace
|
|
#endif
|