JP2003085225A - Integrated circuit designing device and method and program for allowing computer to execute integrated circuit design processing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute the high speed operation of the design processing of an integrated circuit under the consideration of the symmetry of layout. SOLUTION: Layout is folded with a prescribed symmetrical axis as a reference by using layout data stored in a layout data storing part 106, net list information stored in a net list information storing part 107, and symmetry information stored in a symmetry information storing part 109, and the compaction processing of the layout is executed with the symmetrical axis as the reference so that a constraint condition generated from a design rule stored in a design rule storing part 108 can be fulfilled, and then the folding is restored with the symmetrical axis as the reference so that the compaction processed layout can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated circuit designing device for designing an integrated circuit, an integrated circuit designing method, and a program for causing a computer to execute an integrated circuit designing process.

[0002]

2. Description of the Related Art Conventionally, in a layout that emphasizes symmetry, such as a layout of an analog integrated circuit or a high frequency integrated circuit, in order to perform a compaction process or a migration process while maintaining the symmetry, each pair of elements is used. It was necessary to solve the shortest path problem by newly adding a constraint condition for maintaining the symmetry and graphing the whole including the constraint condition.

[0003]

However, in the above-mentioned conventional method, the number of nodes (V) in the graph G (V, E) does not change and the number of constraint conditions (E ) Significantly increases, and there is a problem that the processing time significantly increases.

An object of the present invention is to enable rapid design processing in consideration of symmetry.

[0005]

According to the present invention, layout information of a plurality of integrated circuit components, netlist information of the plurality of components, integrated circuit design rules,
Storage means for storing the symmetry information of the integrated circuit component about a predetermined symmetry reference position which is a reference position for the symmetry of the plurality of components, and the netlist information added to the layout information. , The layout is folded back based on the symmetry reference position based on the symmetry information, and between the plurality of constituent elements based on a predetermined reduction reference position so as to satisfy the constraint condition based on the design rule. An integrated circuit designing apparatus is provided, which is provided with a processing unit that changes the layout so as to reduce a distance and restores folding back of the changed layout based on the symmetry reference position.
The processing means adds the netlist information to the layout information, folds the layout based on the symmetry information with the symmetry reference position as a reference, and performs a predetermined reduction criterion so as to satisfy the constraint condition based on the design rule. The layout is changed so as to reduce the distance between the plurality of constituent elements based on the position, and the folded back of the changed layout is restored based on the symmetry reference position.

Here, the storage means is a layout information storage means for storing layout information of the plurality of integrated circuit constituent elements, and a netlist information storage means for storing netlist information of the plurality of integrated circuit constituent elements. And design rule information storage means for storing design rules of the integrated circuit, and symmetry information of the integrated circuit component about a predetermined symmetry reference position which is a reference position of symmetry of the plurality of components. The symmetry information storage means may be included.

Further, the processing means adds an information adding means for adding the netlist information to the layout information and a layout to which the netlist information is added by the information adding means, based on the symmetry information. Folding means for folding back on the basis of the symmetry reference position,
Layout changing means for changing the layout so as to reduce the distance between the plurality of components with the reduction reference position as a reference so as to satisfy the constraint condition based on the design rule, and the symmetry reference position as a reference Alternatively, it may be configured to include a restoring unit that restores the folded back of the layout changed by the layout changing unit.

The layout changing means may be configured to perform a compaction process or a migration process.

The reduction reference position may be the same position as the symmetry reference position.

The symmetry reference position may be the X axis or the Y axis provided at a predetermined position.

The processing means may add information adding means for adding the netlist information to the layout information and a layout to which the netlist information is added by the information adding means, based on the symmetry information. First
First folding means for folding back with respect to the axis of symmetry of
Changing the layout so as to reduce the distance between the plurality of components with reference to a first reduction reference axis parallel to the first axis of symmetry so as to satisfy the constraint condition based on the design rule; 1 layout change means,
With the first symmetry axis as a reference, a first restoration unit that restores the folding back of the layout changed by the first layout changing unit and a layout restored by the first restoration unit are used as the symmetry information. Based on the second symmetry axis orthogonal to the first symmetry axis as a reference, the second fold-back means is parallel to the second symmetry axis so as to satisfy the constraint condition based on the design rule. Second layout changing means for changing the layout so as to reduce the distances between the plurality of components based on a second reduction axis, and the second layout change based on the second symmetry axis It may be configured to include a second restoration unit that restores the folded back of the layout changed by the unit.

Further, the first and second layout changing means may be configured to perform a compaction process or a migration process.

The first and second reduction reference axes may be configured to be the same as the first and second symmetry axes, respectively.

The first axis of symmetry may be an X axis or a Y axis provided at a predetermined position, and the second axis of symmetry may be a Y axis or an X axis provided at a predetermined position.

Further, according to the present invention, the processing means stores the layout information of the plurality of integrated circuit components stored in the storage means, the netlist information of the plurality of components, the design rule of the integrated circuit, and the plurality of the plurality of integrated circuit design rules. The netlist information is added to the layout information by using the symmetry information of the integrated circuit component with respect to a predetermined symmetry reference position that is a position serving as a symmetry reference of the component, and the symmetry information is added to the netlist information. Based on the symmetry reference position as a reference, the layout is folded back, and the distance between the plurality of components is reduced based on a predetermined reduction reference position so as to satisfy the constraint condition based on the design rule. An integrated circuit, characterized in that the layout is changed, and folding back of the changed layout is restored with the symmetry reference position as a reference. Total method is provided. The processing means is
The netlist information is added to the layout information, and the layout is folded back based on the symmetry information based on the symmetry reference position, and based on the predetermined reduction reference position so as to satisfy the constraint condition based on the design rule. The layout is changed so as to reduce the distance between the plurality of components, and the folded back of the changed layout is restored with the symmetry reference position as a reference.

Here, the storage means is a layout information storage means for storing layout information of the plurality of integrated circuit constituent elements, and a netlist information storage means for storing netlist information of the plurality of integrated circuit constituent elements. And design rule information storage means for storing design rules of the integrated circuit, and symmetry information of the integrated circuit component about a predetermined symmetry reference position which is a reference position of symmetry of the plurality of components. The symmetry information storage means may be included.

Further, the processing means includes an information adding means, a returning means, a layout changing means and a restoring means, the information adding means adds the netlist information to the layout information, and the returning means. , The layout to which the netlist information is added by the information adding means is folded back on the basis of the symmetry reference position based on the symmetry information, and the layout changing means satisfies the constraint condition based on the design rule. To change the layout so as to reduce the distance between the plurality of components based on the reduction reference position,
The restoring means may be configured to restore the folding back of the layout changed by the layout changing means with reference to the symmetry reference position.

The layout changing means may be configured to perform a compaction process or a migration process.

The reduction reference position may be the same position as the symmetry reference position.

The symmetry reference position may be the X axis or the Y axis provided at a predetermined position.

The processing means includes information adding means, first and second folding means, first and second layout changing means, and first and second restoring means, and the information adding means includes: The netlist information is added to the layout information, and the first folding means determines the layout to which the netlist information is added by the information adding means, based on the symmetry information, and determines a first axis of symmetry. As a reference, the first layout changing unit returns the first layout changing unit so that the first layout changing unit satisfies the constraint condition based on the design rule.
The distance between the plurality of constituent elements is reduced with reference to a first reduction reference axis parallel to the symmetry axis of the first layout element, and the first restoring unit uses the first layout with respect to the first symmetry axis as a reference. The fold-back of the layout changed by the changing means is restored, and the second fold-back means restores the layout restored by the first restoring means orthogonal to the first symmetry axis based on the symmetry information. The second layout changing unit is folded back with respect to the second symmetry axis so that the second layout changing unit satisfies the constraint condition based on the design rule.
The layout is changed so as to reduce the distance between the plurality of components based on a second reduction axis parallel to the symmetry axis of, and the second restoring unit uses the second symmetry axis as a reference. It is also possible to restore the folded back of the layout changed by the second layout changing means.

Further, the first and second layout changing means may be configured to perform a compaction process or a migration process.

The first and second reduction reference axes may be the same as the first and second symmetry axes, respectively.

The first axis of symmetry may be an X axis or a Y axis provided at a predetermined position, and the second axis of symmetry may be a Y axis or an X axis provided at a predetermined position.

Further, according to the present invention, a computer
Layout information of a plurality of integrated circuit components stored in the storage means, netlist information of the plurality of components, design rules of the integrated circuit, predetermined symmetry that is a reference position of symmetry of the plurality of components The symmetry information of the integrated circuit component regarding the sex reference position, the netlist information is added to the information of the layout, and the layout is folded based on the symmetry reference position based on the symmetry information. Then, the layout is changed so as to reduce the distance between the plurality of constituent elements with a predetermined reduction reference position as a reference so as to satisfy the constraint condition based on the design rule, and the symmetry reference position as a reference. There is provided a program characterized by causing it to function as a processing unit for restoring the changed layout folding back. By executing the program, the computer executes layout information of the plurality of integrated circuit components stored in the storage unit, netlist information of the plurality of components, design rules of the integrated circuit, symmetry of the plurality of components. Using the symmetry information of the integrated circuit component about the predetermined symmetry reference position which is the reference position of the, add the netlist information to the information of the layout,
The layout is folded based on the symmetry reference position based on the symmetry information, and the distance between the plurality of components is determined based on a predetermined reduction reference position so as to satisfy the constraint condition based on the design rule. And the layout is changed so as to be reduced, and the function serves as a processing unit that restores the folded back of the changed layout with the symmetry reference position as a reference.

Here, the processing means stores the layout information of the plurality of integrated circuit components stored in the layout information storage means and the netlist information of the plurality of integrated circuit components stored in the netlist information storage means. And a design rule of the integrated circuit stored in the design rule information storage means, and an integrated circuit about a predetermined symmetry reference position which is a reference position of the symmetry of the plurality of components stored in the symmetry information storage means. Using the symmetry information of the components, the netlist information is added to the information of the layout, the layout is folded back based on the symmetry reference position based on the symmetry information, and the design rule is added. To reduce the distance between the plurality of constituent elements with reference to a predetermined reduction reference position so as to satisfy the constraint condition based on Wherein to change the layout, so as to restore the folded layout described above changes the symmetry reference position as a reference, may constitute the program.

Further, the processing means adds an information adding means for adding the netlist information to the layout information and a layout to which the netlist information is added by the information adding means on the basis of the symmetry information. Folding means for folding back on the basis of the symmetry reference position,
Layout changing means for changing the layout so as to reduce the distance between the plurality of components with the reduction reference position as a reference so as to satisfy the constraint condition based on the design rule, and the symmetry reference position as a reference Alternatively, the program may be configured to include a restoring unit that restores the loopback of the layout changed by the layout changing unit.

Further, the layout changing means may be configured to perform the compaction process or the migration process.

The program may be configured such that the reduction reference position is the same position as the symmetry reference position.

Further, the program may be configured such that the symmetry reference position is the X axis or the Y axis provided at a predetermined position.

Further, the processing means adds an information adding means for adding the netlist information to the layout information and a layout to which the netlist information is added by the information adding means on the basis of the symmetry information. First
First folding means for folding back with respect to the axis of symmetry of
Changing the layout so as to reduce the distance between the plurality of components with reference to a first reduction reference axis parallel to the first axis of symmetry so as to satisfy the constraint condition based on the design rule; 1 layout change means,
With the first symmetry axis as a reference, a first restoration unit that restores the folding back of the layout changed by the first layout changing unit and a layout restored by the first restoration unit are used as the symmetry information. Based on the second symmetry axis orthogonal to the first symmetry axis as a reference, the second fold-back means is parallel to the second symmetry axis so as to satisfy the constraint condition based on the design rule. Second layout changing means for changing the layout so as to reduce the distances between the plurality of components based on a second reduction axis, and the second layout change based on the second symmetry axis The program may be configured so as to include a second restoration unit that restores the folding back of the layout changed by the unit.

Further, the first and second layout changing means may be configured to perform the compaction process or the migration process.

Further, the program may be configured such that the first and second reduction reference axes are the same as the first and second symmetry axes, respectively.

Further, the program is configured such that the first axis of symmetry is the X axis or the Y axis provided at a predetermined position, and the second axis of symmetry is the Y axis or the X axis provided at the predetermined position. May be.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An integrated circuit designing apparatus, an integrated circuit designing method, and a program for causing a computer to perform integrated circuit designing processing according to embodiments of the present invention will be described below with reference to the accompanying drawings. .

FIG. 1 is a block diagram of an integrated circuit designing apparatus according to an embodiment of the present invention, which is a block diagram common to the first and second embodiments described below.

In FIG. 1, an integrated circuit designing apparatus 100 constituted by a computer performs central processing (CPU) 101, C which performs various arithmetic processing and constitutes processing means.
Display device 1 constituted by RT or the like and constituting display means
02, an input device 103 configured by a keyboard, a mouse, and the like, which constitutes an operating unit, a program executed by the CPU 101, layout information necessary for designing an integrated circuit, and the like, and an external storage device 105 configured by a magnetic disk or the like. The program includes a main storage device 104 in which the program is temporarily stored and the layout information and information in the process of processing are temporarily stored.

The external storage device 105 includes a layout data storage section 106 which constitutes layout information storage means, a netlist information storage section 107 which constitutes netlist information storage means, a design rule storage section 108 which constitutes design rule storage means, and A symmetry information storage unit 109 that constitutes a symmetry information storage means is provided.

The layout data storage unit 106 stores in advance information on the layout of the integrated circuit constituent elements. The netlist information storage unit 107 stores in advance netlist information indicating the connection relationship of the constituent elements of the integrated circuit. The design rule storage unit 108 stores in advance a design rule (design standard) of the integrated circuit. Further, the symmetry information storage unit 109 has a predetermined symmetry reference position (for example, a predetermined origin, a predetermined X axis that is a symmetry axis, or a position that serves as a reference of symmetry of a plurality of integrated circuit constituent elements, or
The symmetry information, which is information indicating which constituent element and which constituent element among the plurality of constituent elements of the integrated circuit have a symmetrical positional relationship with respect to a predetermined Y axis which is a symmetry axis, is stored in advance. ing.

The main memory device 104 is configured so that a virtual memory space is formed, and the integrated circuit design device 100 is provided.
When using the layout data, the netlist information, the design rule, and the symmetry information to perform the design process of the integrated circuit, the virtual memory space is used to perform the process. The external storage device 105 and the main storage device 104 form a storage means.

FIG. 2 is a flow chart showing the processing of the integrated circuit designing apparatus 100 according to the first embodiment of the present invention. The program installed in the external storage device 105 is stored in the main storage device 104, and the CPU 101 executes it. It is executed by processing.

FIGS. 3 to 5 are views for explaining the process in the first embodiment of the present invention, showing the layout of the semiconductor integrated circuit, and the same reference numerals are given to the same constituent elements. is doing. The layouts of FIGS. 3 to 5 may be displayed on the display device 102.

The first embodiment of the present invention will be described below with reference to FIGS.
A semiconductor integrated circuit designing apparatus, a semiconductor integrated circuit designing method, and a program for causing a computer to execute a semiconductor integrated circuit designing process according to the embodiments will be described in detail.

In response to the operation by the input device 103, first, the layout data of the semiconductor integrated circuit is read from the layout information storage unit 106, the netlist information is read from the netlist information storage unit 107, and the netlist information is stored in the layout. It is added to the data (step S201). Step S201 constitutes an information adding means.

In the first embodiment, the layout data is layout data in a general format (GDS format) called a stream (STREAM) file, and the layout data to which netlist information is added is used. This enables compaction processing including the electrical characteristics of each integrated circuit component. For example, even in the same layer, parts that have the same electric potential may be connected, and parts that have different electric potential may be connected so that a short circuit occurs if they are connected. . When the migration process is performed instead of the compaction process, the size of each device can be specified by describing the parameters of the integrated circuit device in the netlist information.

Next, the symmetry information is read from the symmetry information storage unit 109, and as shown in FIG. 3, the layout area is centered on the symmetry reference position which is a predetermined axis of symmetry (or the origin of the layout coordinates). It is divided into a plurality of areas, and the attribute of the component in each area is determined (step S20).
2).

In FIG. 3, a predetermined Y-axis 300 is selected as the symmetry reference position, and attributes of a plurality of constituent elements in the left side region (first region) and right side region (second region) of the Y-axis 300 are selected. Is an example of determining. A component a belonging to the left side region is given a reference symbol a, and a component element belonging to the right side region is given a reference symbol b.
In addition, the same reference numerals (reference numerals 301 to 304 in FIG. 3) are given to the constituent elements of each pair that should maintain symmetry.

Next, the layout is folded back with reference to the predetermined symmetry reference position (Y-axis 300 in the first embodiment) (step S203). As a result, the layout shown in FIG. 4A is obtained. Here, step S
Reference numeral 203 constitutes a folding means, and next, constraint conditions are generated based on the design rule stored in the design rule information storage unit 109 (step S204).

Graphing is performed by performing the processes of steps S201 to S204.

Next, the shortest path problem is solved so as to satisfy the constraint condition, thereby performing the compaction process in the direction of the predetermined reduced reference position, that is, the distance between the plurality of constituent elements with the Y axis 300 as a reference. The layout is changed so as to reduce (step S205). In the first embodiment, since the same Y axis 300 as the symmetry reference position is used as the reduction reference position, each component is compacted in the direction close to the Y axis 300 (X direction). Perform processing. As a result, the layout shown in FIG. 4B is obtained. Here, step S205 constitutes a layout changing means.

Next, a compaction process is performed in the Y direction with reference to a predetermined reduction reference position (for example, a predetermined X axis (not shown)) so as to satisfy the constraint conditions (step S206).

Next, the predetermined symmetry reference position (Y-axis 3
00) as a reference, the loopback of the layout obtained as described above is restored and restored (step S20).
6). As a result, a layout subjected to compaction processing as shown in FIG. 5 is obtained. Here, step S2
Reference numeral 06 constitutes a restoring means.

The layout information obtained as described above is output, and the process ends (step S207). As the output processing, a storage processing in the storage device 105, a rewriting processing of the layout data stored in the leo-out data storage unit 106, a display processing for outputting to the display device 102, or a stream format file to the outside. Output processing, etc., and any one or more processing can be performed.

Note that steps S201 to S208 constitute processing means.

FIG. 6 is a flow chart showing the processing of the integrated circuit designing apparatus 100 according to the second embodiment of the present invention. The program installed in the external storage device 105 is stored in the main storage device 104, and the CPU 101 executes the program. It is executed by processing.

In the first embodiment, the compaction process is performed by utilizing the symmetry on the one axis (Y axis), but in the second embodiment, the two axes (X axis and Y axis) are used. This is an example of performing compaction processing by utilizing the symmetry of.

In FIG. 6, when compaction processing is performed in consideration of symmetry not only in the X direction but also in the Y direction,
In response to the operation by the input device 103, first, the layout data of the semiconductor integrated circuit is read from the layout information storage unit 106, the netlist information is read from the netlist information storage unit 107, and the netlist information is added to the layout data. (Step S601).
Step S601 constitutes an information adding means.

Next, the symmetry information is read from the symmetry information storage unit 109, and the layout area is set with reference to the predetermined first symmetry axis (Y axis in the second embodiment) which is the symmetry reference position. It is divided into a plurality of areas, and the attributes of the plurality of constituent elements in each area are determined (step S602).

Next, the layout is folded back with reference to the first axis of symmetry (Y axis) (step S60).
3). Step S603 constitutes the first folding means.

Next, based on the design rule stored in the design rule information storage unit 109, a constraint condition in the X direction is generated (step S604). Step 604 constitutes a first constraint condition generating means.

Graphing is performed by performing the processing of steps S601 to S604.

Next, a compaction process is performed in the direction of the first reduced standard axis by solving the shortest path problem so as to satisfy the constraint condition, that is, the distance between a plurality of constituent elements is determined with the Y axis as a reference. The layout is changed so as to be reduced in the X direction (step S605). In the second embodiment, the first reduction reference axis is the first
Since the same Y-axis as the symmetry axis of is used, the compaction processing is performed in the direction in which each constituent element approaches the Y-axis (X direction). Here, step S605 constitutes a first layout changing unit.

Next, with reference to the first axis of symmetry (Y axis), the folding back of the layout obtained as described above is restored and restored (step S606). Step S
Reference numeral 606 constitutes a first restoration means.

Next, the layout restored in step S606 is folded back with reference to the second axis of symmetry (X axis) (step S607). Step S607 constitutes second folding means.

Next, a constraint condition in the Y direction is generated based on the design rule stored in the design rule information storage unit 109 (step S608). Step 608 constitutes second constraint condition generation means.

Graphing is performed by performing the processing of steps S607 and S608.

Next, a compaction process is performed in the direction of the second reduced reference axis by solving the shortest path problem so as to satisfy the constraint condition, that is, the distance between a plurality of constituent elements is determined with reference to the X axis. The layout is changed so that the layout is reduced in the Y direction (step S609). In the second embodiment, as the second reduction reference axis, the second
Since the same X axis as the axis of symmetry is used, each component performs compaction processing in the direction close to the X axis (Y direction). Here, step S609 constitutes a second layout changing unit.

Next, with reference to the second axis of symmetry (X axis), the folding back of the layout obtained as described above is restored and restored (step S610). Step S
Reference numeral 610 constitutes a second restoration means.

The layout information obtained as described above is output and the process is terminated (step S611). This makes it possible to quickly perform the compaction process in consideration of the symmetry in the directions of the two axes that are orthogonal to each other.

Incidentally, steps S601 to S611 constitute processing means.

In each of the above-described embodiments, the example of the compaction processing for reducing the interval between the integrated circuit elements without changing the size of the integrated circuit constituent elements (the size of the integrated circuit element or the wiring width) has been described. It is also applicable to the migration process for reducing the size of the integrated circuit components and reducing the distance between the integrated circuit elements.

As described above, the integrated circuit designing apparatus and the integrated circuit designing method according to the embodiments of the present invention are
Processing means (CPU 101, steps S201 to S20
8. Steps S601 to S611 are the storage means (10).
4, 105) layout information of a plurality of integrated circuit components, netlist information of the plurality of components, a design rule of the integrated circuit, a predetermined position which is a reference of symmetry of the plurality of components. Using the symmetry information of the integrated circuit component about the symmetry reference position, the netlist information is added to the layout information, and the layout is based on the symmetry information based on the symmetry reference position. The layout is changed so as to reduce the distance between the plurality of constituent elements with a predetermined reduction reference position as a reference so as to satisfy the constraint condition based on the design rule, and the symmetry reference position as a reference. As described above, since the folded back of the changed layout is restored, the design process of the integrated circuit is performed at high speed in consideration of the symmetry. It becomes possible.

Further, the program according to the embodiment of the present invention stores the information of the layout of a plurality of integrated circuit components stored in the storage means (104, 105) of the computer,
Using the netlist information of the plurality of constituent elements, the design rule of the integrated circuit, and the symmetry information of the integrated circuit constituent element with respect to a predetermined symmetry reference position which is a position serving as a reference of the symmetry of the plurality of constituent elements. , The netlist information is added to the layout information, the layout is folded based on the symmetry information with the symmetry reference position as a reference, and predetermined to satisfy the constraint condition based on the design rule. Processing means (CP) that modifies the layout so as to reduce the distance between the plurality of constituent elements based on the contraction reference position and restores the folded back of the changed layout based on the symmetry reference position.
U101, steps S201 to S208, step S6
01 to S611), the computer can be made to perform the design process of the integrated circuit at high speed in consideration of the symmetry.

[0074]

According to the integrated circuit designing apparatus and the integrated circuit designing method of the present invention, the designing process of the integrated circuit can be performed at high speed in consideration of the symmetry.

According to the program of the present invention,
It is possible to allow a computer to perform integrated circuit design processing at high speed.

[Brief description of drawings]

FIG. 1 is a block diagram of an integrated circuit design device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a process according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a design process according to the first embodiment of this invention.

FIG. 4 is an explanatory diagram illustrating a design process according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating a design process according to the first embodiment of the present invention.

FIG. 6 is a flowchart showing a process according to the second embodiment of the present invention.

[Explanation of symbols]

100 ... Integrated circuit designing device 101 ... CPU constituting processing means 102 ... Display device 103 constituting display means ... Input device 104 constituting operation means ... Main component constituting storage means Storage device 105 ... External storage device 106 constituting storage means ... Layout data storage portion 107 constituting layout information storage means ... Netlist information storage portion 108 constituting netlist information storage means ... Design rule storage unit 109 constituting the design rule information storage unit ... Symmetry information storage unit constituting the symmetry information storage unit

Claims (30)

[Claims] 1. The layout information of a plurality of integrated circuit components, the netlist information of the plurality of components, the design rule of the integrated circuit, and a predetermined symmetry that is a reference position of the symmetry of the plurality of components. Storage means for storing the symmetry information of the integrated circuit component about the sex reference position, the netlist information is added to the information of the layout, and the layout is referenced based on the symmetry reference position based on the symmetry information. And the layout is changed so as to reduce the distance between the plurality of constituent elements with a predetermined reduction reference position as a reference so as to satisfy the constraint condition based on the design rule. An integrated circuit designing device comprising a processing means for restoring the folding back of the changed layout as a reference. 2. The storage means includes layout information storage means for storing layout information of the plurality of integrated circuit components, and netlist information storage means for storing netlist information of the plurality of integrated circuit components. A design rule information storage unit that stores design rules of the integrated circuit, and symmetry information of the integrated circuit component about a predetermined symmetry reference position that is a reference position of symmetry of the plurality of components. The integrated circuit designing apparatus according to claim 1, further comprising symmetry information storage means. 3. The processing means adds an information adding means for adding the netlist information to the layout information, a layout to which the netlist information is added by the information adding means, based on the symmetry information, Folding means for folding back with the symmetry reference position as a reference, and changing the layout so as to reduce the distance between the plurality of constituent elements with the reduction reference position as a reference so as to satisfy the constraint condition based on the design rule. 3. The integrated circuit design according to claim 1, further comprising: a layout changing unit configured to perform the layout change, and a restoring unit that restores the folding back of the layout changed by the layout changing unit with reference to the symmetry reference position. apparatus. 4. The integrated circuit design apparatus according to claim 3, wherein the layout changing unit performs a compaction process or a migration process. 5. The integrated circuit design device according to claim 1, wherein the reduction reference position is the same position as the symmetry reference position. 6. The integrated circuit design device according to claim 5, wherein the symmetry reference position is an X axis or a Y axis provided at a predetermined position. 7. The processing means includes an information adding means for adding the netlist information to the layout information, a layout to which the netlist information is added by the information adding means, based on the symmetry information, A first folding means for folding back on the basis of a first axis of symmetry, and a plurality of the plurality of folding means on the basis of a first reduced reference axis parallel to the first axis of symmetry so as to satisfy a constraint condition based on the design rule. First layout changing means for changing the layout so as to reduce the distance between the constituent elements; and a first layout changing means for restoring the folding back of the layout changed by the first layout changing means with reference to the first axis of symmetry. And a second symmetry axis orthogonal to the first symmetry axis on the basis of the symmetry information, the first restoration means and the layout restored by the first restoration means. Second folding means for folding back as a reference, and reducing the distance between the plurality of constituent elements on the basis of a second reduction axis parallel to the second axis of symmetry so as to satisfy the constraint condition based on the design rule. So as to change the layout, and second restoring means for restoring the turn-back of the layout changed by the second layout changing means with reference to the second axis of symmetry. Claim 1 characterized by the following.
Or the integrated circuit designing device according to item 2. 8. The integrated circuit design apparatus according to claim 7, wherein the first and second layout changing means perform compaction processing or migration processing. 9. The first and second reduction reference axes are respectively:
9. The integrated circuit design device according to claim 7, wherein the first and second axes of symmetry are the same. 10. The first symmetry axis is an X-axis or a Y-axis provided at a predetermined position, and the second symmetry axis is a Y-axis provided at a predetermined position.
10. The integrated circuit designing device according to claim 9, wherein the device is an axis or an X axis. 11. The processing means stores layout information of a plurality of integrated circuit components stored in the storage means, netlist information of the plurality of components, design rules of the integrated circuit, and symmetry of the plurality of components. By using the symmetry information of the integrated circuit component about the predetermined symmetry reference position which is the reference position, the netlist information is added to the information of the layout, and the layout is based on the symmetry information. The folding process is performed with the symmetry reference position as a reference, and the layout is changed to reduce the distance between the plurality of constituent elements with a predetermined reduction reference position as a reference so as to satisfy the constraint condition based on the design rule, A method for designing an integrated circuit, wherein the folded back of the changed layout is restored with the symmetry reference position as a reference. 12. The storage means includes layout information storage means for storing layout information of the plurality of integrated circuit components, and netlist information storage means for storing netlist information of the plurality of integrated circuit components. A design rule information storage unit that stores design rules of the integrated circuit, and symmetry information of the integrated circuit component about a predetermined symmetry reference position that is a reference position of symmetry of the plurality of components. 12. The integrated circuit design method according to claim 11, further comprising symmetry information storage means. 13. The processing means includes information adding means, wrapping means, layout changing means, and restoring means, the information adding means adds the netlist information to the layout information, and the wrapping means , The layout to which the netlist information is added by the information adding means is folded back based on the symmetry information with the symmetry reference position as a reference, and the layout changing means satisfies the constraint condition based on the design rule. As described above, the layout is changed so as to reduce the distance between the plurality of constituent elements with the reduction reference position as a reference, and the restoring unit changes with the layout changing unit with the symmetry reference position as a reference. 13. The integrated circuit designing method according to claim 11, wherein the folding back of the layout is restored. 14. The integrated circuit design method according to claim 13, wherein the layout changing unit performs a compaction process or a migration process. 15. The integrated circuit designing method according to claim 11, wherein the reduction reference position is the same position as the symmetry reference position. 16. The integrated circuit design method according to claim 15, wherein the symmetry reference position is an X axis or a Y axis provided at a predetermined position. 17. The processing means includes information adding means, first and second folding means, first and second layout changing means, and first and second restoring means, and the information adding means includes: The netlist information is added to the layout information, and the first folding means determines the layout to which the netlist information is added by the information adding means, based on the symmetry information, sets a first axis of symmetry. Folding back as a reference, between the plurality of constituent elements, the first layout changing unit uses a first reduced reference axis parallel to the first symmetry axis as a reference so that the constraint condition based on the design rule is satisfied. Is reduced, the first restoring means restores the folding back of the layout changed by the first layout changing means with reference to the first axis of symmetry, and the second folding back is performed. Means folds back the layout restored by the first restoring means, based on the symmetry information, with a second symmetry axis orthogonal to the first symmetry axis as a reference, and the second layout changing means Changing the layout so as to reduce the distance between the plurality of components with reference to a second reduction axis parallel to the second symmetry axis so as to satisfy the constraint condition based on the design rule, 13. The integrated circuit designing method according to claim 11, wherein the second restoring unit restores the folding back of the layout changed by the second layout changing unit with reference to the second axis of symmetry. . 18. The integrated circuit design method according to claim 17, wherein the first and second layout changing means perform a compaction process or a migration process. 19. The integrated circuit design method according to claim 17, wherein the first and second reduction reference axes are the same as the first and second symmetry axes, respectively. 20. The first axis of symmetry is the X or Y axis provided at a predetermined position, and the second axis of symmetry is the Y axis provided at a predetermined position.
20. The integrated circuit design method according to claim 19, wherein the method is an axis or an X axis. 21. Layout information of a plurality of integrated circuit components stored in a storage means of a computer, netlist information of the plurality of components, design rules of an integrated circuit, symmetry criteria of the plurality of components. The netlist information is added to the layout information by using the symmetry information of the integrated circuit component about the predetermined symmetry reference position which is the position where And the layout is changed so as to reduce the distance between the plurality of components with reference to a predetermined reduction reference position so as to satisfy the constraint condition based on the design rule. It is characterized in that it functions as a processing means for restoring the folding back of the changed layout with reference to the symmetry reference position. Program. 22. The processing means stores layout information of the plurality of integrated circuit components stored in the layout information storage means, and netlist information of the plurality of integrated circuit components stored in the netlist information storage means. An integrated circuit configuration regarding a design rule of the integrated circuit stored in the design rule information storage means and a predetermined symmetry reference position which is a reference position of symmetry of the plurality of components stored in the symmetry information storage means Using the element symmetry information, the netlist information is added to the layout information, the layout is folded back based on the symmetry reference position based on the symmetry information, and based on the design rule. In order to reduce the distance between the plurality of components with reference to a predetermined reduction reference position so as to satisfy the constraint condition, 22. The program according to claim 21, wherein the computer is caused to function so as to change a layout and restore the folded back of the changed layout with the symmetry reference position as a reference. 23. The processing means includes an information adding means for adding the netlist information to the layout information, a layout to which the netlist information is added by the information adding means, based on the symmetry information, Folding means for folding back with the symmetry reference position as a reference, and changing the layout so as to reduce the distance between the plurality of constituent elements with the reduction reference position as a reference so as to satisfy the constraint condition based on the design rule. The computer is caused to function so as to include a layout changing unit that performs the layout change, and a restoring unit that restores the folding back of the layout changed by the layout changing unit with reference to the symmetry reference position. 21. The program according to 22. 24. The layout changing unit causes the computer to perform a compaction process or a migration process.
The listed program. 25. The program according to claim 21, wherein the computer is caused to function so that the reduction reference position is the same position as the symmetry reference position. 26. The program according to claim 25, wherein the computer is caused to function so that the symmetry reference position is an X axis or a Y axis provided at a predetermined position. 27. The processing means adds an information adding means for adding the netlist information to the layout information, and a layout to which the netlist information is added by the information adding means, based on the symmetry information, A first folding means for folding back on the basis of a first axis of symmetry, and a plurality of the plurality of folding means on the basis of a first reduced reference axis parallel to the first axis of symmetry so as to satisfy a constraint condition based on the design rule. First layout changing means for changing the layout so as to reduce the distance between the constituent elements; and a first layout changing means for restoring the folding back of the layout changed by the first layout changing means with reference to the first axis of symmetry. No. 1 restoration unit and a layout restored by the first restoration unit based on the symmetry information, a second symmetry orthogonal to the first symmetry axis. And a distance between the plurality of components based on a second reduction axis parallel to the second axis of symmetry so as to satisfy the constraint condition based on the design rule. A second layout changing unit that changes the layout so as to reduce the size; and a second restoring unit that restores the folded back of the layout changed by the second layout changing unit with the second symmetry axis as a reference. 23. The program according to claim 21 or 22, wherein the computer is caused to function as if it is provided. 28. The program according to claim 27, wherein the first and second layout changing units cause the computer to perform a compaction process or a migration process. 29. The computer is operated so that the first and second reduction reference axes are the same as the first and second symmetry axes, respectively.
Or the program according to item 28. 30. The first axis of symmetry is the X or Y axis provided at a predetermined position, and the second axis of symmetry is the Y axis provided at a predetermined position.
30. The program according to claim 29, which causes the computer to function as an axis or an X axis.