buff.syr

this programs gives the functionality of 2bit alu

Release 6.3i - xst G.35
Copyright (c) 1995-2004 Xilinx, Inc.  All rights reserved.
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--> Parameter xsthdpdir set to ./xst
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--> Reading design: buff.prj

TABLE OF CONTENTS
  1) Synthesis Options Summary
  2) HDL Compilation
  3) HDL Analysis
  4) HDL Synthesis
  5) Advanced HDL Synthesis
     5.1) HDL Synthesis Report
  6) Low Level Synthesis
  7) Final Report
     7.1) Device utilization summary
     7.2) TIMING REPORT


=========================================================================
*                      Synthesis Options Summary                        *
=========================================================================
---- Source Parameters
Input File Name                    : buff.prj
Input Format                       : mixed
Ignore Synthesis Constraint File   : NO
Verilog Include Directory          : 

---- Target Parameters
Output File Name                   : buff
Output Format                      : NGC
Target Device                      : xc3s50-5-pq208

---- Source Options
Top Module Name                    : buff
Automatic FSM Extraction           : YES
FSM Encoding Algorithm             : Auto
FSM Style                          : lut
RAM Extraction                     : Yes
RAM Style                          : Auto
ROM Extraction                     : Yes
ROM Style                          : Auto
Mux Extraction                     : YES
Mux Style                          : Auto
Decoder Extraction                 : YES
Priority Encoder Extraction        : YES
Shift Register Extraction          : YES
Logical Shifter Extraction         : YES
XOR Collapsing                     : YES
Resource Sharing                   : YES
Multiplier Style                   : auto
Automatic Register Balancing       : No

---- Target Options
Add IO Buffers                     : YES
Global Maximum Fanout              : 500
Add Generic Clock Buffer(BUFG)     : 8
Register Duplication               : YES
Equivalent register Removal        : YES
Slice Packing                      : YES
Pack IO Registers into IOBs        : auto

---- General Options
Optimization Goal                  : Speed
Optimization Effort                : 1
Keep Hierarchy                     : NO
Global Optimization                : AllClockNets
RTL Output                         : Yes
Write Timing Constraints           : NO
Hierarchy Separator                : _
Bus Delimiter                      : <>
Case Specifier                     : maintain
Slice Utilization Ratio            : 100
Slice Utilization Ratio Delta      : 5

---- Other Options
lso                                : buff.lso
Read Cores                         : YES
cross_clock_analysis               : NO
verilog2001                        : YES
Optimize Instantiated Primitives   : NO

=========================================================================


=========================================================================
*                          HDL Compilation                              *
=========================================================================
Compiling vhdl file G:/vijay_FPGA_LAB/alu_2bit/buff.vhd in Library work.
Entity <buff> (Architecture <behavioral>) compiled.

=========================================================================
*                            HDL Analysis                               *
=========================================================================
Analyzing Entity <buff> (Architecture <behavioral>).
Entity <buff> analyzed. Unit <buff> generated.


=========================================================================
*                           HDL Synthesis                               *
=========================================================================

Synthesizing Unit <buff>.
    Related source file is G:/vijay_FPGA_LAB/alu_2bit/buff.vhd.
Unit <buff> synthesized.


=========================================================================
*                       Advanced HDL Synthesis                          *
=========================================================================

Advanced RAM inference ...
Advanced multiplier inference ...
Advanced Registered AddSub inference ...
Dynamic shift register inference ...

=========================================================================
HDL Synthesis Report

Found no macro
=========================================================================

=========================================================================
*                         Low Level Synthesis                           *
=========================================================================

Optimizing unit <buff> ...
Loading device for application Xst from file '3s50.nph' in environment E:/Xilinx.

Mapping all equations...
Building and optimizing final netlist ...
Found area constraint ratio of 100 (+ 5) on block buff, actual ratio is 0.

=========================================================================
*                            Final Report                               *
=========================================================================
Final Results
RTL Top Level Output File Name     : buff.ngr
Top Level Output File Name         : buff
Output Format                      : NGC
Optimization Goal                  : Speed
Keep Hierarchy                     : NO

Design Statistics
# IOs                              : 4

Cell Usage :
# IO Buffers                       : 4
#      IBUF                        : 2
#      OBUF                        : 2
=========================================================================

Device utilization summary:
---------------------------

Selected Device : 3s50pq208-5 

 Number of bonded IOBs:                  4  out of    124     3%  


=========================================================================
TIMING REPORT

NOTE: THESE TIMING NUMBERS ARE ONLY A SYNTHESIS ESTIMATE.
      FOR ACCURATE TIMING INFORMATION PLEASE REFER TO THE TRACE REPORT
      GENERATED AFTER PLACE-and-ROUTE.

Clock Information:
------------------
No clock signals found in this design

Timing Summary:
---------------
Speed Grade: -5

   Minimum period: No path found
   Minimum input arrival time before clock: No path found
   Maximum output required time after clock: No path found
   Maximum combinational path delay: 6.159ns

Timing Detail:
--------------
All values displayed in nanoseconds (ns)

-------------------------------------------------------------------------
Timing constraint: Default path analysis
Delay:               6.159ns (Levels of Logic = 2)
  Source:            i<1> (PAD)
  Destination:       o<1> (PAD)

  Data Path: i<1> to o<1>
                                Gate     Net
    Cell:in->out      fanout   Delay   Delay  Logical Name (Net Name)
    ----------------------------------------  ------------
     IBUF:I->O             1   1.679   0.240  i_1_IBUF (o_1_OBUF)
     OBUF:I->O                 4.240          o_1_OBUF (o<1>)
    ----------------------------------------
    Total                      6.159ns (5.919ns logic, 0.240ns route)
                                       (96.1% logic, 3.9% route)

=========================================================================
CPU : 10.39 / 11.98 s | Elapsed : 10.00 / 12.00 s
 
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Total memory usage is 60664 kilobytes