map.mrp

实用的程序代码

               Xilinx Mapping Report File for Design "use_gsr"
          Copyright (c) 1995-1997 Xilinx, Inc.  All rights reserved.

Design Information
------------------
Command Line   : map use_gsr.ngd -o map.ncd use_gsr.pcf 
Target Device  : x4005e
Target Package : pc84
Target Speed   : -2
Mapper Version : xc4000e -- M1.4.12
Mapped Date    : Tue Jan  6 16:50:37 1998

Design Summary
--------------
   Number of errors:        0
   Number of warnings:      7
   Number of CLBs:              4 out of   196    2%
      CLB Flip Flops:       8
      4 input LUTs:         8
      3 input LUTs:         0
   Number of bonded IOBs:      10 out of    61   16%
      IOB Flops:            0
      IOB Latches:          0
   Number of global buffers:    1 out of     8   12%
   Number of secondary CLKs:    1 out of     4   25%
   Number of STARTUPs:          1
Total equivalent gate count for design: 138
Additional JTAG gate count for IOBs:    480

Table of Contents
-----------------
Section 1 - Errors
Section 2 - Warnings
Section 3 - Design Attributes
Section 4 - Removed Logic Summary
Section 5 - Removed Logic
Section 6 - Added Logic
Section 7 - Expanded Logic
Section 8 - Signal Cross-Reference
Section 9 - Symbol Cross-Reference
Section 10 - IOB Properties
Section 11 - RPMs
Section 12 - Guide Report

Section 1 - Errors
------------------

Section 2 - Warnings
--------------------
WARNING:baste:24 - All of the external outputs in this design are using
   slew-rate-limited output drivers.  The delay on speed critical outputs can be
   dramatically reduced by designating them as fast outputs in the original
   design.  Please see your vendor interface documentation for specific
   information on how to do this within your design-entry tool.
   Note: You should be careful not to designate too many outputs which switch
   together as fast, because this can cause excessive ground bounce.  For more
   information on this subject, please refer to the IOB switching characteristic
   guidelines for the device you are using in the Programmable Logic Data Book.
WARNING:x4kma:111 - All the logic for FMAP symbol
   "sub_50/minus/minus/u6/S0_1/FMAP5_2_f" (output
   signal=sub_50/minus/minus/u6/FUNC<4>) has been removed!  This may be caused
   by key logic being trimmed.  Please consult the Removed Logic section of this
   report to see if this is the case.
WARNING:x4kma:111 - All the logic for FMAP symbol
   "sub_50/minus/minus/u6/S0_1/FMAP6_2_g" (output
   signal=sub_50/minus/minus/u6/FUNC<5>) has been removed!  This may be caused
   by key logic being trimmed.  Please consult the Removed Logic section of this
   report to see if this is the case.
WARNING:x4kma:111 - All the logic for FMAP symbol
   "add_41/plus/plus/u6/S0_1/FMAP5_2_f" (output
   signal=add_41/plus/plus/u6/FUNC<4>) has been removed!  This may be caused by
   key logic being trimmed.  Please consult the Removed Logic section of this
   report to see if this is the case.
WARNING:x4kma:111 - All the logic for FMAP symbol
   "add_41/plus/plus/u6/S0_1/FMAP6_2_g" (output
   signal=add_41/plus/plus/u6/FUNC<5>) has been removed!  This may be caused by
   key logic being trimmed.  Please consult the Removed Logic section of this
   report to see if this is the case.
WARNING:x4kma:340 - Signal "n254" on pin A1 of HIERCY4_32 symbol
   "add_41/plus/plus/u6/S0_1/CY4_1" (output
   signal=add_41/plus/plus/u6/S0_1/CO_3) is not required by carry mode
   INCDEC-F-CI.  The signal is being removed.  This carry component has been
   mode-reduced.  The original carry mode was "INCDEC-FG-CI".

WARNING:x4kma:340 - Signal "n258" on pin A1 of HIERCY4_32 symbol
   "sub_50/minus/minus/u6/S0_1/CY4_1" (output
   signal=sub_50/minus/minus/u6/S0_1/CO_3) is not required by carry mode
   INCDEC-F-CI.  The signal is being removed.  This carry component has been
   mode-reduced.  The original carry mode was "INCDEC-FG-CI".


Section 3 - Design Attributes
-----------------------------

Section 4 - Removed Logic Summary
---------------------------------
  13 Block(s) trimmed
   5 block(s) optimized away
  13 signal(s) removed

Section 5 - Removed Logic
-------------------------
Block "U1/ROC" (X_ZERO) removed due to optimization.
Block "net11.ZERO" (X_ZERO) removed due to optimization.
Block "net12.ZERO" (X_ZERO) removed due to optimization.
Block "add_41/plus/plus/n19.ONE" (X_ONE) removed due to optimization.
Block "sub_50/minus/minus/n20.ZERO" (X_ZERO) removed due to optimization.

The trimmed logic report below shows the logic removed from your design due to
sourceless or loadless signals, and VCC or ground connections.  If the removal
of a signal or symbol results in the subsequent removal of an additional signal
or symbol, the message explaining that second removal will be indented.  This
indentation will be repeated as a chain of related logic is removed.

To quickly locate the original cause for the removal of a chain of logic, look
above the place where that logic is listed in the trimming report, then locate
the lines that are least indented (begin at the leftmost edge).

The signal "U1/TOC" is loadless and has been removed.
 Loadless block "U1/TOC" (X_ZERO) removed.

The trimmed logic reported below is either:
   1. part of a cycle
   2. part of disabled logic
   3. a side-effect of other trimmed logic

The signal "add_41/plus/plus/grnd_sig" is unused and has been removed.
 Unused block "add_41/plus/plus/grnd_sig.ZERO" (X_ZERO) removed.
The signal "sub_50/minus/minus/grnd_sig" is unused and has been removed.
 Unused block "sub_50/minus/minus/grnd_sig.ZERO" (X_ZERO) removed.
The signal "add_41/plus/plus/u6/FUNC<5>" is unused and has been removed.
 Unused block
"add_41/plus/plus/u6/S0_1/XOR5_G_SUM_2/add_41/plus/plus/u6/FUNC<5>" (X_XOR2)
removed.
  The signal "add_41/plus/plus/u6/FUNC<5>/2.0" is unused and has been removed.
   Unused block
"add_41/plus/plus/u6/S0_1/XOR5_G_SUM_2/add_41/plus/plus/u6/FUNC<5>/2.0" (X_XOR2)
removed.
    The signal "add_41/plus/plus/u6/S0_1/CO_5" is unused and has been removed.
     Unused block "add_41/plus/plus/u6/S0_1/CY4_2" (HIERCY4_31) removed.
The signal "add_41/plus/plus/u6/FUNC<4>" is unused and has been removed.
 Unused block
"add_41/plus/plus/u6/S0_1/XOR4_F_SUM_2/add_41/plus/plus/u6/FUNC<4>" (X_XOR2)
removed.
  The signal "add_41/plus/plus/u6/FUNC<4>/2.0" is unused and has been removed.
   Unused block
"add_41/plus/plus/u6/S0_1/XOR4_F_SUM_2/add_41/plus/plus/u6/FUNC<4>/2.0" (X_XOR2)
removed.
The signal "sub_50/minus/minus/u6/FUNC<5>" is unused and has been removed.
 Unused block
"sub_50/minus/minus/u6/S0_1/XOR5_G_SUM_2/sub_50/minus/minus/u6/FUNC<5>" (X_XOR2)
removed.
  The signal "sub_50/minus/minus/u6/FUNC<5>/2.0" is unused and has been removed.
   Unused block
"sub_50/minus/minus/u6/S0_1/XOR5_G_SUM_2/sub_50/minus/minus/u6/FUNC<5>/2.0"
(X_XOR2) removed.
    The signal "sub_50/minus/minus/u6/S0_1/CO_5" is unused and has been removed.
     Unused block "sub_50/minus/minus/u6/S0_1/CY4_2" (HIERCY4_31) removed.
The signal "sub_50/minus/minus/u6/FUNC<4>" is unused and has been removed.
 Unused block
"sub_50/minus/minus/u6/S0_1/XOR4_F_SUM_2/sub_50/minus/minus/u6/FUNC<4>" (X_XOR2)
removed.
  The signal "sub_50/minus/minus/u6/FUNC<4>/2.0" is unused and has been removed.
   Unused block
"sub_50/minus/minus/u6/S0_1/XOR4_F_SUM_2/sub_50/minus/minus/u6/FUNC<4>/2.0"
(X_XOR2) removed.

Section 6 - Added Logic
-----------------------

Section 7 - Expanded Logic
--------------------------
To enable this section, set the environment variable MAP_REPORT_DETAIL to TRUE
and rerun MAP.

Section 8 - Signal Cross-Reference
----------------------------------
To enable this section, set the environment variable MAP_REPORT_DETAIL to TRUE
and rerun MAP.

Section 9 - Symbol Cross-Reference
----------------------------------
To enable this section, set the environment variable MAP_REPORT_DETAIL to TRUE
and rerun MAP.

Section 10 - IOB Properties
---------------------------
"UPCNT<3>" (IOB) : SLEW=SLOW
"UPCNT<2>" (IOB) : SLEW=SLOW
"UPCNT<1>" (IOB) : SLEW=SLOW
"UPCNT<0>" (IOB) : SLEW=SLOW
"DNCNT<3>" (IOB) : SLEW=SLOW
"DNCNT<2>" (IOB) : SLEW=SLOW
"DNCNT<1>" (IOB) : SLEW=SLOW
"DNCNT<0>" (IOB) : SLEW=SLOW

Section 11 - RPMs
-----------------

Section 12 - Guide Report
-------------------------
Guide not run on this design.