How can I add alignments to the structures generated from Simulink bus objects?

How can I add alignments to the structures generated from buses? I want my structure definition to look like below:

typedef __declspec(align(32)) 

struct {

int f1;

int f2;

} myStruct;

Answer 1

[MathWorks Support Team]

To be able to add alignment to structure definitions you need to use the alignment property of the bus object along with the code replacement library. 

Step1: Set the desired alignment on the bus object

Step2: Use Code Replacement (CRL) Tool and generate a dummy table (for details of creating tables with CRL tool check Quick Start Code Replacement Library Development - Simulink)

Step3: Generate registry file and set alignment specifications, and the supported languages. Please note that in the alignment syntax %n refers to the alignment value specified in the bus object in Step1:

Step4: Run sl_refresh_customizations :

Step5: Choose the library (which is the registry name you set in Step3) from configuration settings of the model:

After following these steps, if you generate code for the model, it will add alignments to the structure definitions for buses that have set a value for the alignment property in the format you have specified in Step3:

Step6: Add "DATA_ALIGNMENT_GLOBAL_VAR" to the AlignmentType list in the alignment specification within the target file