Resource Sharing of Multiply-Add and Other Blocks

This section contains parameters in the HDL Code Generation > Optimization > Resource sharing tab of the Configuration Parameters dialog box. Enable these parameters to save resources on the target device by specifying whether to share Multiply-Add blocks, atomic subsystems, and MATLAB Function blocks in your design.

Share Multiply-Add blocks

Share Multiply-Add blocks with the resource sharing optimization.

Settings

Default: On

On: When resource sharing is enabled, share Multiply-Add blocks with a bit width greater than or equal to Multiply-Add block sharing minimum bitwidth.
Off: Do not share Multiply-Add blocks.

Dependency

To share Multiply-Add blocks in your design, in the HDL Block Properties for the DUT Subsystem, specify the SharingFactor.
When you specify the Multiply-Add block sharing minimum bitwidth, the code generator shares Multiply-Add blocks that have a bit width greater than or equal to the minimum bit width. The default minimum bit width for sharing Multiply-Add blocks is zero.

Command-Line Information

Property: ShareMultiplyAdds

Type: character vector

Value: 'on' | 'off'

Default: 'on'

To set this property, use hdlset_param or makehdl. To view the property value, use hdlget_param.

For example, you can use the ShareMultiplyAdds setting when you generate HDL code for the symmetric_fir subsystem inside the sfir_fixed model using either of these methods.

Pass the property as an argument to the makehdl function.

makehdl('sfir_fixed/symmetric_fir', ... 
        'ShareMultiplyAdds','on')

When you use hdlset_param, you can set the parameter on the model and then generate HDL code using makehdl.
```
hdlset_param('sfir_fixed','ShareMultiplyAdds','on')
makehdl('sfir_fixed/symmetric_fir')
```

Multiply-Add block sharing minimum bitwidth

Use this parameter to specify the minimum bit width that is required to share Multiply-Add with the resource sharing optimization.

Settings

Default: 0

0, 1: No minimum bit width for shared Multiply-Add blocks.
N, where N is an integer greater than 1: When resource sharing and Multiply-Add block sharing are enabled, share Multiply-Add blocks with a bit width greater than or equal to N.

Dependency

To share Multiply-Add blocks in your design:

In the Resource Sharing tab, make sure that the Multiply-Add blocks check box is selected.
In the HDL Block Properties for the DUT Subsystem, specify the SharingFactor.

Command-Line Information

Property: MultiplierAddSharingMinimumBitwidth

Type: integer

Value: integer greater than or equal to 0

Default: 0

To set this property, use hdlset_param or makehdl. To view the property value, use hdlget_param.

For example, you can use the MultiplierAddSharingMinimumBitwidth setting when you generate HDL code for the symmetric_fir subsystem inside the sfir_fixed model using either of these methods.

Pass the property as an argument to the makehdl function.

makehdl('sfir_fixed/symmetric_fir', ... 
        'MultiplierAddSharingMinimumBitwidth',16)

When you use hdlset_param, you can set the parameter on the model and then generate HDL code using makehdl.
```
hdlset_param('sfir_fixed',MultiplierAddSharingMinimumBitwidth',16)
makehdl('sfir_fixed/symmetric_fir')
```

Share Atomic subsystems

Share atomic subsystems with the resource sharing optimization.

Settings

Default: On

On: When resource sharing is enabled, share atomic subsystems.
Off: Do not share atomic subsystems.

Dependency

To share Atomic Subsystem blocks in your design, in the HDL Block Properties for the parent DUT Subsystem, specify the SharingFactor.

Command-Line Information

Property: ShareAtomicSubsystems

Type: character vector

Value: 'on' | 'off'

Default: 'on'

To set this property, use hdlset_param or makehdl. To view the property value, use hdlget_param.

For example, you can use the ShareMultiplyAdds setting when you generate HDL code for the symmetric_fir subsystem inside the sfir_fixed model using either of these methods.

Pass the property as an argument to the makehdl function.

makehdl('sfir_fixed/symmetric_fir', ... 
        'ShareAtomicSubsystems','on')

When you use hdlset_param, you can set the parameter on the model and then generate HDL code using makehdl.
```
hdlset_param('sfir_fixed','ShareAtomicSubsystems','on')
makehdl('sfir_fixed/symmetric_fir')
```

Share MATLAB Function blocks

Share MATLAB Function blocks with the resource sharing optimization.

Settings

Default: On

On: When resource sharing is enabled, share MATLAB Function blocks.
Off: Do not share MATLAB Function blocks.

Dependency

To share MATLAB Function blocks in your design, in the HDL Block Properties for the parent DUT Subsystem, specify the SharingFactor.

Command-Line Information

Property: ShareMATLABBlocks

Type: character vector

Value: 'on' | 'off'

Default: 'on'

To set this property, use hdlset_param or makehdl. To view the property value, use hdlget_param.

For example, you can use the ShareMATLABBlocks setting when you generate HDL code for the symmetric_fir subsystem inside the sfir_fixed model using either of these methods.

Pass the property as an argument to the makehdl function.

makehdl('sfir_fixed/symmetric_fir', ... 
        'ShareMATLABBlocks','on')

When you use hdlset_param, you can set the parameter on the model and then generate HDL code using makehdl.
```
hdlset_param('sfir_fixed','ShareMATLABBlocks','on')
makehdl('sfir_fixed/symmetric_fir')
```

Documentation