| PROOF(1) | CAO-VLSI Reference Manual | PROOF(1) |
See the file buster/alliance/alc_origin.1.en.gz.
Made to run on a data-flow description, proof supports the
same subset of VHDL as asimut and boom and boog (for further informations
about this subset, please call the VHDL manual). proof uses a Reduced
Ordered Binary Decision Diagrams representation that permits the designer to
prove easily the functionnal equivalence between two behavioral
descriptions. proof is generally used in order to compare a
behavioural specification with an extracted behaviour obtained by
yagle.
In default mode, a collapsing phase is done on the description by removing all
the auxiliary signals (the BDD of the outputs, the registers and the buses
are described from the inputs or the registers). The two descriptions must
contain the same ressources (signals register with the same name). It is
possible to use the .inf file in yagle (see further remark
about YAGLE in this document) to rename the registers in the
extracted behavioural description (see man yagle). The datas and the
commands (the guarded expressions) must match separatly. The buses
corresponding to completely specified logical functions are represented by a
logical multiplexor in both descriptions. The two descriptions must have the
same interface (VHDL entity), if they do not, the formal proof is
stopped.
proof only uses two system environment variables related to the work
directory.
MBK_WORK_LIB gives the path for the behavioral
descriptions. The default value is the current directory.
MBK_CATA_LIB gives some auxiliary pathes for the behavioral descriptions. The default value is the current directory.
Options may be given in any order before the filenames.
-a This option asks proof to keep the common auxiliary signals. proof keeps all intermediate signals that have the same name in both descriptions (A common signal is considered as an input and an output of each description). This option can be useful for descriptions containing large equations. It may be used when proof has failed or if you want to debug in step by step mode the two different descriptions.
-d The program displays errors when the behavioral descriptions
are different. Equations are displayed when it's possible.
proof -a -d adder1 adder2
YAGLE (Functional abstraction) is now comercially distributed by Avertec (http://www.avertec.com/). More information can be obtained at their web site. Binaries of this tool can also be downloaded for non-commercial university research.
boom (1), boog (1), loon (1), asimut(1), vhdl(5), vbe(5).
See the file buster/alliance/alc_bug_report.1.en.gz.
| October 1, 1997 | ASIM/LIP6 |