LAX(5)

NAME
lax - Parameter file for logic synthesis

SYNOPSIS

filename.lax

DESCRIPTION

The .lax file contains user modifiable parameters that lead to different logic synthesis.

EXAMPLE

Circuit Interfce
-- Entity Declaration
ENTITY digia IS
  PORT (
  clock : in BIT;	-- clock
  jour : in BIT;	-- jour
  reset : in BIT;	-- reset
  vdd : in BIT;	-- vdd
  vss : in BIT;	-- vss
  i : in bit_vector(3 DOWNTO 0) ;	-- i
  porte : out BIT;	-- porte
  alarm : out BIT;	-- alarm
  ep_0 : out BIT;	-- ep_0
  ep_1 : out BIT;	-- ep_1
  ep_2 : out BIT;	-- ep_2
  ep_3 : out BIT;	-- ep_3
  ep_4 : out BIT;	-- ep_4
  ep_5 : out BIT;	-- ep_5
  ep_a : out BIT	-- ep_a
  );
END digia;
-- Architecture Declaration
ARCHITECTURE behaviour_data_flow OF digia IS
  SIGNAL cs : REG_VECTOR(0 TO 2) REGISTER;	-- cs
  SIGNAL cs_ea : BIT;		-- cs_ea
  SIGNAL ef_ea : BIT;		-- ef_ea
  SIGNAL cs_e5 : BIT;		-- cs_e5
  SIGNAL ef_e5 : BIT;		-- ef_e5
  SIGNAL cs_e4 : BIT;		-- cs_e4
  SIGNAL ef_e4 : BIT;		-- ef_e4
  SIGNAL cs_e3 : BIT;		-- cs_e3
  SIGNAL ef_e3 : BIT;		-- ef_e3
  SIGNAL cs_e2 : BIT;		-- cs_e2
  SIGNAL ef_e2 : BIT;		-- ef_e2
  SIGNAL cs_e1 : BIT;		-- cs_e1
  SIGNAL ef_e1 : BIT;		-- ef_e1
  SIGNAL cs_e0 : BIT;		-- cs_e0
  SIGNAL ef_e0 : BIT;		-- ef_e0
  SIGNAL ef : BIT_VECTOR(0 TO 2);	-- ef
.Lax parameter file
## This line is a comment
## Set the Optimisation Mode (0..4)
## 0 : full area optimisation
## 2 : 50% area, 50% delay
## 4 : full delay optimisation
## Used by boog and loon
#M{4}
## Set the Optimisation Level (1..5)
## 1 : poor optimisation - small computation time
## 5 : best optimisation - long computation time
#L{5}
## External Input Delay (in ns)
## Those signals are taken into account to optimise
## the global delay of the circuit.
## Used by boog and loon
#D{
i(3):300;
i(0):100;
jour:120;
}
## Set the list of early outputs
## Some outputs may be critical. They can be
## optimized in delay before others regardless
## of the optimisation mode.
#E{
porte;
ep_3;
}
## Set the list of auxiliary (intermediate) signals to keep
## This can be used to decrease the memory consuption
## when trying to reorder Bdds. Those signals wont
## be reordered.
#S{
cs_ea;
ef_0;
ef_1;
ef_e4;
}
## The following parameters are used for whith C4
## Number of serial transistor in  N-graph
#N{4}
## Number of serial transistor in  P-graph
#P{4}
## The following parameters are used for whith glop
## (Delayed --#D--inputs are also used)
## Fanout factor : the max fanout of the
## output connector is multiplied by this factor
#T{1000}
## Input Capacitance : The primary inputs of the circuit
## can have fanout values. (in fF)
#F{
jour:50;
}
## External Output Capacitance (in fF)
## Used by boog and loon
#C{
porte:50;
}
## External Input Impedance (in Ohms)
## Used by boog and loon
#I{
jour:5000;
}
## Buffered Input : this is a list of primary inputs whith
## the number of buffer you want to add.
#B{
clock:1;
}

SEE ALSO
boom(1), boog(1). loon(1).