Comparison operations

Name

Eq/Ne : Easy way to test the value of the nets

Synopsys

netOut <= net.Eq ( "n" )

Description

Comparaison functions are listed below :

• Eq : returns true if the value of the net is equal to n.
• Ne : returns true if the value of the net is different from n.

Note that it is possible to change the generator instanciated with the SetComp method.

Parameters

The constant given as argument must be a string representing :

• A decimal number
• A binary number : the string must begin with "0b"
• An hexadecimal number : the string must begin with "0x"

Example

class essai ( Model ) :

  def Interface ( self ) :
    self.A = SignalIn  ( "a", 4 )
    
    self.S = SignalOut ( "s", 1 )
    self.T = SignalOut ( "t", 1 )

    self.vdd = VddIn  ( "vdd" )
    self.vss = VssIn  ( "vss" )
	
  def Netlist ( self ) :

    self.S <= self.A.Eq ( "4" )

    self.T <= self.A.Ne ( "1" )

Errors

Some errors may occur :

• [Stratus ERROR] Eq :
the number does not match with the net's lenght.
  When one uses comparaison functions on one net, one has to check that the number corresponds to the size of the net.
• [Stratus ERROR] Eq :
the argument must be a string representing a number in decimal,
binary (0b) or hexa (0x).
  The string given as argument does not have the right form.

See Also

Introduction Netlist Instanciation of a multiplexor Instanciation of a shifter Instanciation of a register Instanciation of constants Boolean operations Arithmetical operations