write_back.syr

16位cpu设计VHDL源码

Release 6.2i - xst G.28
Copyright (c) 1995-2004 Xilinx, Inc.  All rights reserved.
--> Parameter TMPDIR set to __projnav
CPU : 0.00 / 0.48 s | Elapsed : 0.00 / 0.00 s
 
--> Parameter xsthdpdir set to ./xst
CPU : 0.00 / 0.48 s | Elapsed : 0.00 / 0.00 s
 
--> Reading design: write_back.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                    : write_back.prj
Input Format                       : mixed
Ignore Synthesis Constraint File   : NO
Verilog Include Directory          : 

---- Target Parameters
Output File Name                   : write_back
Output Format                      : NGC
Target Device                      : xcv200-4-pq240

---- Source Options
Top Module Name                    : write_back
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                                : write_back.lso
Read Cores                         : YES
cross_clock_analysis               : NO
verilog2001                        : YES
Optimize Instantiated Primitives   : NO
tristate2logic                     : No

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


=========================================================================
*                          HDL Compilation                              *
=========================================================================
Compiling vhdl file E:/资料/计算机设计与实践/MyCPU16/write_back.vhdl in Library work.
Architecture behavioral of Entity write_back is up to date.

=========================================================================
*                            HDL Analysis                               *
=========================================================================
Analyzing Entity <write_back> (Architecture <behavioral>).
WARNING:Xst:766 - E:/资料/计算机设计与实践/MyCPU16/write_back.vhdl line 29: Generating a Black Box for component <bufgp>.
WARNING:Xst:819 - E:/资料/计算机设计与实践/MyCPU16/write_back.vhdl line 30: The following signals are missing in the process sensitivity list:
   Addr, ALUout, Rtemp.
Entity <write_back> analyzed. Unit <write_back> generated.


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

Synthesizing Unit <write_back>.
    Related source file is E:/资料/计算机设计与实践/MyCPU16/write_back.vhdl.
WARNING:Xst:647 - Input <IRout<11>> is never used.
WARNING:Xst:647 - Input <IRout<7:0>> is never used.
WARNING:Xst:646 - Signal <clkgp> is assigned but never used.
    Found 3-bit tristate buffer for signal <Radd>.
    Found 8-bit tristate buffer for signal <Rdata>.
    Found 16-bit tristate buffer for signal <PCnew>.
    Found 8 1-bit 2-to-1 multiplexers.
    Summary:
	inferred   8 Multiplexer(s).
	inferred  27 Tristate(s).
Unit <write_back> synthesized.


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

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

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

Macro Statistics
# Multiplexers                     : 1
 8-bit 2-to-1 multiplexer          : 1
# Tristates                        : 3
 16-bit tristate buffer            : 1
 8-bit tristate buffer             : 1
 3-bit tristate buffer             : 1

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

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

Optimizing unit <write_back> ...
Loading device for application Xst from file 'v200.nph' in environment C:/Xilinx.

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

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

Design Statistics
# IOs                              : 79

Macro Statistics :
# Multiplexers                     : 1
#      2-to-1 multiplexer          : 1
# Tristates                        : 3
#      16-bit tristate buffer      : 1
#      3-bit tristate buffer       : 1
#      8-bit tristate buffer       : 1

Cell Usage :
# BELS                             : 17
#      LUT2                        : 2
#      LUT3                        : 12
#      LUT4                        : 3
# Clock Buffers                    : 1
#      BUFGP                       : 1
# IO Buffers                       : 69
#      IBUF                        : 40
#      OBUF                        : 2
#      OBUFT                       : 27
=========================================================================

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

Selected Device : v200pq240-4 

 Number of Slices:                      10  out of   2352     0%  
 Number of 4 input LUTs:                17  out of   4704     0%  
 Number of bonded IOBs:                 69  out of    170    40%  
 Number of GCLKs:                        1  out of      4    25%  


=========================================================================
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: -4

   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: 14.124ns

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

-------------------------------------------------------------------------
Timing constraint: Default path analysis
Delay:               14.124ns (Levels of Logic = 5)
  Source:            ALUout<0> (PAD)
  Destination:       PCupdate (PAD)

  Data Path: ALUout<0> to PCupdate
                                Gate     Net
    Cell:in->out      fanout   Delay   Delay  Logical Name (Net Name)
    ----------------------------------------  ------------
     IBUF:I->O             2   0.989   1.474  ALUout_0_IBUF (ALUout_0_IBUF)
     LUT4:I0->O            1   0.738   1.265  PCupdate12 (CHOICE154)
     LUT4:I1->O            1   0.738   1.265  PCupdate51 (CHOICE164)
     LUT2:I1->O            1   0.738   1.265  PCupdate62 (PCupdate_OBUF)
     OBUF:I->O                 5.652          PCupdate_OBUF (PCupdate)
    ----------------------------------------
    Total                     14.124ns (8.855ns logic, 5.269ns route)
                                       (62.7% logic, 37.3% route)

=========================================================================
CPU : 1.94 / 3.06 s | Elapsed : 2.00 / 3.00 s
 
--> 

Total memory usage is 63160 kilobytes