HDLGenerator::Assign Class Reference

#include <HDLGenerator.hh>

Inheritance diagram for HDLGenerator::Assign:

Collaboration diagram for HDLGenerator::Assign:

Public Member Functions
	Assign (std::string var, LHSValue value)
	Assign (std::string var, LHSValue value, int idx)
	Assign (std::string var, LHSValue value, int ub, int lb)
void	build () override
void	hdl (std::ostream &stream, Language lang, int level) override
Public Member Functions inherited from HDLGenerator::SequentialStatement
	SequentialStatement (std::string name)
Public Member Functions inherited from HDLGenerator::Generatable
	Generatable (std::string name)
virtual	~Generatable ()=default
virtual void	reads (const std::string &var)
virtual void	reads (const LHSValue &var)
virtual void	writes (const std::string &var)
virtual Register &	getRegister (const std::string &var)
virtual bool	hasOption (const std::string &var)
virtual bool	isRegister (const std::string &name)
virtual bool	isVariable (const std::string &name)
virtual bool	isConstant (const std::string &name)
virtual Width	width (const std::string &name)
int	integerWidth (const std::string &name)
virtual WireType	wireType (const std::string &name)
virtual Width	width ()
virtual WireType	wireType () const
virtual void	hdl (std::ostream &stream, Language lang)
virtual void	implementAll (std::ostream &stream, Language lang)
virtual void	implementAll (std::ostream &stream, Language lang, int indent)
template<typename Func >
void	forAll (Func func)
template<typename Type , typename Func >
void	forAll (Func func)
template<class Type >
bool	parentIs ()
template<class Type >
Type *	parentType ()
void	pushComponent (std::shared_ptr< Generatable > c)
template<class Component >
void	addComponent (Component c)
const std::string &	name () const noexcept
void	setParent (Generatable *parent) noexcept
Generatable *	parent () const noexcept

Private Attributes
int	index_
int	upperBound_
int	lowerBound_
LHSValue	value_

Detailed Description

Assignment.

Definition at line 539 of file HDLGenerator.hh.

Constructor & Destructor Documentation

Assign() [1/3]

HDLGenerator::Assign::Assign ( std::string  var, LHSValue  value  )

inline

Definition at line 541 of file HDLGenerator.hh.

            : SequentialStatement(var), index_(-1), upperBound_(-1),
              lowerBound_(-1), value_(value) {}

Assign() [2/3]

HDLGenerator::Assign::Assign ( std::string  var, LHSValue  value, int  idx  )

inline

Definition at line 544 of file HDLGenerator.hh.

            : SequentialStatement(var), index_(idx), upperBound_(-1),
              lowerBound_(-1), value_(value) {}

Assign() [3/3]

HDLGenerator::Assign::Assign ( std::string  var, LHSValue  value, int  ub, int  lb  )

inline

Definition at line 547 of file HDLGenerator.hh.

            : SequentialStatement(var), index_(-1), upperBound_(ub),
              lowerBound_(lb), value_(value) {}

Member Function Documentation

build()

void HDLGenerator::Assign::build ( )

inlineoverridevirtual

Reimplemented from HDLGenerator::Generatable.

Definition at line 551 of file HDLGenerator.hh.

                              {
            Generatable::build();
            writes(name());
            reads(value_);
        }

References HDLGenerator::Generatable::build(), HDLGenerator::Generatable::name(), HDLGenerator::Generatable::reads(), value_, and HDLGenerator::Generatable::writes().

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hdl()

void HDLGenerator::Assign::hdl ( std::ostream &  stream, Language  lang, int  level  )

inlineoverridevirtual

Reimplemented from HDLGenerator::SequentialStatement.

Definition at line 557 of file HDLGenerator.hh.

                                                                        {
            if (isRegister(name()) && !parentIs<Synchronous>()) {
                throw std::runtime_error(
                    "assigning to register '" + name() +
                    "' is only allowed in synchronous context");
            } else if (isVariable(name()) && (!parentIs<Synchronous>() ||
                                                 !parentIs<Asynchronous>())) {
                throw std::runtime_error("Not allowed to assign to '" +
                                         name() + "' in this context.");
            }
            if (lang == Language::VHDL) {
                stream << StringTools::indent(level) << name();
                if (upperBound_ >= 0) {
                    stream << "(" << upperBound_ << " downto "
                                  << lowerBound_ << ")";
                } else if (index_ >= 0) {
                    stream << "(" << index_ << ")";
                }
                if (isVariable(name())) {
                    stream << " := ";
                } else {
                    stream << " <= ";
                }
            } else if (lang == Language::Verilog) {
                if (!(parentIs<Synchronous>() || parentIs<Asynchronous>())) {
                    stream << StringTools::indent(level) << "always @*\n"
                           << StringTools::indent(level + 1) << name();
                } else {
                    stream << StringTools::indent(level) << name();
                }
                if (upperBound_ >= 0) {
                    stream << "[" << upperBound_ << ":" << lowerBound_ << "]";
                } else if (index_ >= 0) {
                    stream << "[" << index_ << "]";
                }
                if (isRegister(name())) {
                    stream << " <= ";
                } else {
                    stream << " = ";
                }
            } else {
                throw std::runtime_error(__PRETTY_FUNCTION__);
            }
            value_.hdl(stream, lang);
            stream << ";\n";
        }

References HDLGenerator::LHSValue::hdl(), StringTools::indent(), index_, HDLGenerator::Generatable::isRegister(), HDLGenerator::Generatable::isVariable(), lowerBound_, HDLGenerator::Generatable::name(), upperBound_, value_, HDLGenerator::Verilog, and HDLGenerator::VHDL.

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Member Data Documentation

index_

int HDLGenerator::Assign::index_

private

Definition at line 605 of file HDLGenerator.hh.

Referenced by hdl().

lowerBound_

int HDLGenerator::Assign::lowerBound_

private

Definition at line 607 of file HDLGenerator.hh.

Referenced by hdl().

upperBound_

int HDLGenerator::Assign::upperBound_

private

Definition at line 606 of file HDLGenerator.hh.

Referenced by hdl().

value_

LHSValue HDLGenerator::Assign::value_

private

Definition at line 608 of file HDLGenerator.hh.

Referenced by build(), and hdl().

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The documentation for this class was generated from the following file:

• HDLGenerator.hh