adder4.syr

这是个基于 Xilinx Spartan3 的加法器

Release 6.3i - xst G.35
Copyright (c) 1995-2004 Xilinx, Inc.  All rights reserved.
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--> Reading design: adder4.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                    : adder4.prj
Input Format                       : mixed
Ignore Synthesis Constraint File   : NO
Verilog Include Directory          : 

---- Target Parameters
Output File Name                   : adder4
Output Format                      : NGC
Target Device                      : xc2s15-6-cs144

---- Source Options
Top Module Name                    : adder4
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                   : lut
Automatic Register Balancing       : No

---- Target Options
Add IO Buffers                     : YES
Global Maximum Fanout              : 100
Add Generic Clock Buffer(BUFG)     : 4
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                                : adder4.lso
Read Cores                         : YES
cross_clock_analysis               : NO
verilog2001                        : YES
Optimize Instantiated Primitives   : NO
tristate2logic                     : No

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


=========================================================================
*                          HDL Compilation                              *
=========================================================================
Compiling source file "adder4.v"
Module <adder4> compiled
No errors in compilation
Analysis of file <adder4.prj> succeeded.
 

=========================================================================
*                            HDL Analysis                               *
=========================================================================
Analyzing top module <adder4>.
Module <adder4> is correct for synthesis.
 

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

Synthesizing Unit <adder4>.
    Related source file is adder4.v.
    Found 4-bit adder carry in/out for signal <$n0000>.
    Summary:
	inferred   1 Adder/Subtracter(s).
Unit <adder4> synthesized.


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

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

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

Macro Statistics
# Adders/Subtractors               : 1
 4-bit adder carry in/out          : 1

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

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

Optimizing unit <adder4> ...
Loading device for application Xst from file '2s15.nph' in environment D:/Xilinx.

Mapping all equations...
Building and optimizing final netlist ...
Found area constraint ratio of 100 (+ 5) on block adder4, actual ratio is 1.

=========================================================================
*                            Final Report                               *
=========================================================================
Final Results
RTL Top Level Output File Name     : adder4.ngr
Top Level Output File Name         : adder4
Output Format                      : NGC
Optimization Goal                  : Speed
Keep Hierarchy                     : NO

Design Statistics
# IOs                              : 14

Macro Statistics :
# Adders/Subtractors               : 1
#      4-bit adder carry in/out    : 1

Cell Usage :
# BELS                             : 12
#      LUT2                        : 4
#      MUXCY                       : 4
#      XORCY                       : 4
# IO Buffers                       : 14
#      IBUF                        : 9
#      OBUF                        : 5
=========================================================================

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

Selected Device : 2s15cs144-6 

 Number of Slices:                       2  out of    192     1%  
 Number of 4 input LUTs:                 4  out of    384     1%  
 Number of bonded IOBs:                 14  out of     90    15%  


=========================================================================
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: -6

   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: 9.226ns

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

-------------------------------------------------------------------------
Timing constraint: Default path analysis
Delay:               9.226ns (Levels of Logic = 7)
  Source:            ina<0> (PAD)
  Destination:       sum<3> (PAD)

  Data Path: ina<0> to sum<3>
                                Gate     Net
    Cell:in->out      fanout   Delay   Delay  Logical Name (Net Name)
    ----------------------------------------  ------------
     IBUF:I->O             1   0.776   1.035  ina_0_IBUF (ina_0_IBUF)
     LUT2:I0->O            1   0.549   0.000  adder4_sum<0>lut (N10)
     MUXCY:S->O            1   0.659   0.000  adder4_sum<0>cy (adder4_sum<0>_cyo)
     MUXCY:CI->O           1   0.042   0.000  adder4_sum<1>cy (adder4_sum<1>_cyo)
     MUXCY:CI->O           1   0.042   0.000  adder4_sum<2>cy (adder4_sum<2>_cyo)
     XORCY:CI->O           1   0.420   1.035  adder4_sum<3>_xor (sum_3_OBUF)
     OBUF:I->O                 4.668          sum_3_OBUF (sum<3>)
    ----------------------------------------
    Total                      9.226ns (7.156ns logic, 2.070ns route)
                                       (77.6% logic, 22.4% route)

=========================================================================
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Total memory usage is 53764 kilobytes