How can I make Embedded Coder use "memset" instead of enormous hard-coded constants?

How can I make Embedded Coder use "memset" instead of enormous hard-coded constants?

I have a constant block containing an array with 100e3 elements. I have enabled "Use memset to initialize floats and doubles to 0.0", but this constant shows up as 100e3 hard-coded zeros in the "*.c" generated code file. This constant takes up more than 6000 lines of code--all zeros.

Run below command in MATLAB 2016b for documentation:

>> web(fullfile(docroot, 'simulink/gui/use-memset-to-initialize-floats-and-doubles-to-0-0.html'))

Or for latest release documentation on using memset to initialize floats and doubles to 0.0, please refer to:

https://www.mathworks.com/help/releases/R2023a/rtw/ref/usememsettoinitializefloatsanddoublesto0.0.html

Answer 1

[MathWorks Support Team]

Make sure that the "Inline invariant signals" optimization has been enabled.

Run below command in MATLAB 2016b for documentation:

>> web(fullfile(docroot, 'simulink/gui/inline-invariant-signals.html'))

Or for latest release documentation on inline invariant signals, please refer to:

https://www.mathworks.com/help/rtw/ug/inlining-invariant-signals.html

This setting can interact with using "memset" such that "memset" is not used unless "Inline invariant signals" has been enabled.