Support: non-finite numbers

Code generation for nonfinite data

Model Configuration Pane: Code Generation / Interface

Description

The Support: non-finite numbers parameter specifies whether to generate code for nonfinite data and operations on nonfinite data.

If you clear this parameter for the top model, clear the parameter for referenced models.

If you select the MAT-file logging parameter, select this parameter.

Dependencies

If the System target file parameter is set to an ERT-based system target file:

To enable this parameter, select the Support: floating-point numbers parameter.
If you select the MAT-file logging parameter, select parameters Support: floating-point numbers and Support: non-finite numbers.

Settings

on (default) | off

On

Enables generation of nonfinite data (for example, NaN and Inf) and related operations.

Off

Disables generation of nonfinite data and operations. If you clear this parameter, an error occurs if the code generator encounters non-finite data or expressions. The error message reports offending blocks and parameters.

Note

Code generation is optimized with the assumption that nonfinite data are absent. However, if your application produces nonfinite numbers through signal data or MATLAB^® code, when processing the nonfinite data, the behavior of the generated code might be inconsistent with simulation results.

Recommended Settings

Application	Setting
Debugging	No impact
Traceability	No impact
Efficiency	Off (execution, ROM), No impact (RAM)
Safety precaution	No recommendation

Programmatic Use

Parameter: SupportNonFinite

Type: character vector

Value: 'on' | 'off'

Default: 'on'

Version History

Introduced before R2006a

expand all

R2024a: Support for built-in C99 and C++11 language standard literals

Starting in R2024a, the code generator uses built-in C99 and C++11 language standard literals for nonfinite constants in the generated code instead of generated nonfinite constants. For C89/C90 and C++03, the code generator produces nonfinite constants that conform to the IEEE-754 standard.

Before R2024a, the code generator produced nonfinite constants per the IEEE-754 standard for all supported C/C++ target language standards (C89/C90, C99, C++03, and C++11).