Function Replacement

Define code replacement mappings for functions

Use the Code Replacement Tool or programming interface to define code replacement mappings for math, memory, nonfinite, semaphore, mutex, lookup table, or your own custom functions. Control data alignment. Customize the code match and replacement process.

Tools

Code Replacement Tool	Create, modify, and validate content of code replacement libraries
Code Replacement Viewer	Explore content of code replacement libraries

Functions

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Tables and Table Entries

`addEntry`	Add table entry to collection of table entries registered in code replacement table
`createCRLEntry`	Create code replacement table entry from conceptual and implementation argument string specifications
`registerCFunctionEntry`	Create function entry based on specified parameters and register in code replacement table
`registerCPPFunctionEntry`	Create C++ function entry based on specified parameters and register in code replacement table
`registerCPromotableMacroEntry`	Create promotable code replacement macro entry based on specified parameters and register in code replacement table (for `abs` function replacement only)
`RTW.TflCFunctionEntry`	Create code replacement table entry for a function
`RTW.TflCFunctionEntryML`	Custom code replacement table function entry
`RTW.TflCSemaphoreEntry`	Create code replacement table entry for a semaphore or mutex
`RTW.TflTable`	Create code replacement table
`setTflCFunctionEntryParameters`	Set specified parameters for function entry in code replacement table
`setTflCSemaphoreEntryParameters`	Set specified parameters for semaphore entry in code replacement table

Conceptual and Implementation Arguments

`addConceptualArg`	Add conceptual argument to array of conceptual arguments for code replacement table entry
`addDWorkArg`	Add DWork argument for entry in code replacement table
`copyConceptualArgsToImplementation`	Copy conceptual argument specifications to implementation specifications of an entry for code replacement table entry
`createAndAddImplementationArg`	Create implementation argument from specified properties and add to implementation arguments for code replacement table entry
`createAndSetCImplementationReturn`	Create implementation return argument from specified properties and add to implementation for code replacement table entry
`createCRLEntry`	Create code replacement table entry from conceptual and implementation argument string specifications
`createAndAddConceptualArg`	Create conceptual argument from specified properties and add to conceptual arguments for code replacement table entry
`getTflArgFromString`	Create code replacement argument based on specified name and built-in data type
`getTflDWorkFromString`	Create code replacement DWork argument for semaphore entry based on specified name and data type

Build Information

`addAdditionalHeaderFile`	Add header file to array of header files for code replacement table entry
`addAdditionalIncludePath`	Add include path to array of include paths for code replacement table entry
`addAdditionalLinkObj`	Add link object to array of link objects for code replacement table entry
`addAdditionalLinkObjPath`	Add link object path to array of link object paths for code replacement table entry
`addAdditionalSourceFile`	Add source file to array of source files for code replacement table entry
`addAdditionalSourcePath`	Add source path to array of source paths for code replacement table entry

C++

`enableCPP`	Enable C++ support for function entry in code replacement table
`setNameSpace`	Set namespace for C++ function entry in code replacement table

Lookup Tables

`addAlgorithmProperty`	Add algorithm properties for code replacement table entry
`getAlgorithmParameters`	Examine algorithm parameter settings for lookup table function code replacement table entry
`setAlgorithmParameters`	Set algorithm parameters for lookup table function code replacement table entry

Data Alignment and Reserved Identifier Registration

`addComplexTypeAlignment`	Specify alignment boundary of a complex type
`setReservedIdentifiers`	Register reserved identifiers to associate with code replacement library

Replacement of Code Generated from MATLAB Code

`coder.ceval`	Call C/C++ function from generated code
`coder.replace`	Replace current MATLAB function implementation with code replacement library function in generated code

Topics

Math Function Code Replacement
Develop a code replacement library to replace math functions.
Memory Function Code Replacement
Define a code replacement mapping for a memory function.
Nonfinite Function Code Replacement
Define a code replacement mapping for nonfinite utility functions.
Algorithm-Based Code Replacement
Define a code replacement mapping based on the computation or approximation algorithm configured for a math function block.
Lookup Table Function Code Replacement
Define a code replacement mapping for a lookup table function.
Replace MATLAB Functions with Custom Code by Using the coder.replace Function
Replace a MATLAB function with a function in generated C or C++ code by using the coder.replace function.
Replace coder.ceval Calls to External Functions
Replace a function that you specify in a call to the coder.ceval function.
Buffer Index Calculation Code Replacement
Develop a code replacement library to replace circular buffer index calculations.
Custom Function Code Replacement
Define a code replacement mapping for a custom C function.
Compare Rounding and Overflow Modes in C/C++ Code and Simulink
Determine the rounding mode used in a division function for code replacement.

Related Information

Code Replacement