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NAME

       VASY - VHDL Analyzer for Synthesis

SYNOPSIS

       vasy  [-VpavsoipSHL]  [-C  num] [-E num] [-I format] [-P file] filename
       [outname]

DESCRIPTION

       VASY is a hierarchical VHDL Analyzer for Synthesis.   VASY  performs  a
       semantic  analysis  of  a  VHDL  RTL  description filename, with a VHDL
       subset much more extended than the Alliance one (see vasy(5)  for  more
       details), and identifies with precision all the memorizing elements and
       tristate buffers.
       During its analysis, VASY expands generic parameters, executes  generic
       map and generate statements, and also unrolls static FOR loops.
       At  the  end, VASY drives an equivalent description outname (in Verilog
       or VHDL format) accepted by most of synthesis tools.

ENVIRONMENT VARIABLES

       MBK_WORK_LIB(1)
                 indicates the  path  to  the  read/write  directory  for  the
                 session.

OPTIONS

       -V        Verbose  mode  on.  Each step of the analysis is displayed on
                 the standard output.

       -v        Drives an equivalent description in Verilog format.

       -a        Drives an equivalent  description  in  Alliance  VHDL  format
                 vbe(5) and/or vst(5).  We can note that with this option, all
                 arithmetic operators are expanded in  an  equivalent  set  of
                 boolean  expressions, because these operators don't belong to
                 the Alliance VHDL subset.

       -s        Drives an equivalent VHDL  description  (with  the  extention
                 .vhd) accepted by most of industrial synthesis tools.

       -S        Uses  Std_logic  instead of Bit (taken into account only with
                 option -s).

       -i        Drives initial signal values (taken into  account  only  with
                 option -s).

       -I format Specifies  the VHDL input format such as Alliance VHDL format
                 vbe(5), vst(5) or industrial VHDL format vhd or vhdl.

       -H        In a structural  description,  all  model  of  instances  are
                 recursively  analyzed.  (By default VASY analyzes only models
                 with generic parameters) The leaves cells are  defined  by  a
                 file called CATAL (see catal(5) for details).

       -o        Authorizes to overwrite existing files.

       -p        Adds power supply connectors (vdd and vss). Usefull option to
                 enter in Alliance.

       -C num    When the size of the adder is greater or equal to num a Carry
                 Look  Ahead  adder  is  generated,  instead of a Ripple Carry
                 adder.  (taken into account only with option -a).

       -E num    Comparators are expanded in  an  equivalent  set  of  boolean
                 expressions,  when their size is greater than num (taken into
                 account only with option -a).

       -L        A file .lax (see lax(5) for details) is generated. This  file
                 contains the list of all signals that must be kept during the
                 synthesis step, using boom (see boom(1) for details).  (taken
                 into account only with option -a).

       -P file   Specifies  a  'file.pkg'  containing  a  list  of logical and
                 physical package name:
                 # Example
                 work.constants.all  : pkg_constants
                 work.components.all : pkg_components

SEE ALSO

       vasy(5),  vbe(5),  vhdl(5),  catal(5).   lax(5).   asimut(1),  boom(1),
       MBK_WORK_LIB(1).  MBK_CATA_LIB(1).  MBK_CATAL_NAME(1).