User`s guide

3 Project Generator

Reviewing P rocessor-Specific Target Function Library

Changes in Generated Code

Use one of the following techniques or tools to see the target function library

elements where they appear in the generated code:

• Review the Code Manually.

• Use M odel-to -Code Tracing to navigate from blocks in your model to the

code generated from the block.

• Use a File Differencing Schem e to compare projects that y ou generate

before and after you select a processor-speciﬁc target function library.

Reviewing Code Manually

To see where the generated code uses target function library replacements,

review the ﬁle

modelname.c . Look for code similar to the following statement

codeopt_tfl_B.Sum6[j] = ldexp((real_T)Sum[j], -11) + ldexp((real_T)

c62x_mul_s32_s32_s32_sr_sat(codeopt_tfl_P.Gain5_Gain, UnitDelay[j], 6),

The function c62x_mul_s32_s32_s32_sr_sat is the m ultiply implementation

function registered in the TI C62x target function library. In this example, the

function performs an optimized multiplication operation. Similar functions

appear for

add,andsub. For more information about the arguments in the

function, refer to “Introduction to Target Function Libraries” in the online

Help system.

Using Model-to-Code Tracing

You can use the model-to-code report o ptions in the conﬁguration parameters

to trace the code generated from any block with target function library. After

you create y our model and select a target function library, follow these steps

to use the report options to trace the generated code:

1 Open the model conﬁguration parameters.

2 Select Report from the Select tree.

3 In the Report pane, select Create code generation report and

Model-to-code, and then save your changes.

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