User`s guide

3 Code Generation and the Build Process

3-40

Function Splitting

Sometimes a file may not be too large, but a single function contained in the file

might be too long. Because of this, your compiler may not be able to perform

code optimizations. To solve this problem, you can use function splitting to

create smaller functions.

You can control function splitting by using the

Code Generation Options

dialog box.

The function size threshold is specified by the TLC variable

FunctionSizeThreshold, which by default is set to zero.

Functions will only be split at block boundaries or at

ssIsSampleHit calls at

the base scope level. If

ssIsSampleHit or a block boundary is not found at the

function split threshold, the next line that satisfies either of these conditions

becomes the location where the function is split.

A Perl script performs function splitting by text-based post-processing of the

generated source code.

Function splitting will only split functions that begin with the characters

Mdl,

Sys, or the name of the model. The naming convention for split functions takes

the original function name and appends an integer, starting with 1 and

Select Function Splitting from the

Function Management pull-down

menu.

Specify the

Function Split Threshold.

This can be any positive integer.

The

Local block outputs check box is

disabled when file splitting occurs. Local

variable declarations in a function are

not copied over to split functions.