[FAQ] TDA4VH-Q1: [DSPLIB/MATHLIB] : Steps to Migrate C66x Source Code to C7x

Betsy Varughese

Part Number: TDA4VH-Q1
Other Parts Discussed in Thread: MATHLIB

Hi,

How can I port my existing C66x code to an optimized C7x implementation?

Regards,

Betsy Varughese

+1 Betsy Varughese 15 days ago

Hi,

Kindly follow the steps outlined below to migrate the existing C66x code to the C7x platform.

1) Download the SDK containing C66x source code : https://www.ti.com/tool/PROCESSOR-SDK-J721E#downloads

2) Analyze Existing C66x Source Code :

Go through the logic and implementation of the current C66x code. The source code is available at "mathlib_c66x_3_1_2_4\packages\ti\mathlib\src\".

3) Set Up the C7x Development Environment ((if it’s not already installed):

Download and install the C7x Code Generation Tools (CGT) from here..
Refer to the C7x Math/dsp Library implementation for the particular kernel located at "mathlib\src\MATHLIB_<kernel_name>" to understand the folder structure and API's used.

4) Apply C7x-Specific Optimizations:

Leverage vectorization and streaming engine features for performance improvements. (Training Material Link is attached below)

5) Replace C66x Intrinsic with C7x Equivalents :

Based on the logic replace the C66x-specific intrinsic with corresponding C7x intrinsic
Use the C7x Instruction Set Architecture (ISA) documentation available at https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/06_01_01_12/index_FDS.html for guidance.

6) Measure the performance improvement using __TSC.

Regards,

Betsy Varughese

Processors forum