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Overview

Vitis™ DSP Library for digital signal processing

Vitis DSP Library contains:

  • L1, L2, and L3 levels for digital signal processing
  • AI Engine DSP Library
  • Programmable Logic (PL) DSP Library
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Vitis AI Engine DSP Library - Key Features

Accelerator Binaries

Download Accelerator Binaries onto Platform


Download Accelerator Binaries onto Platform

Open-Source Library

Data movement between Host and Accelerators


Open-source library for DSP applications

Kernels in C++

Board Recovery, Debug, Power Management


Kernels are coded in your familiar C++

Benchmarks

Download Accelerator Binaries onto Platform


Benchmarks and Quality of Results (QoR) are provided

Example Design

Data movement between Host and Accelerators


An example design is provided with this library

Complex Designs

Board Recovery, Debug, Power Management


Combine kernels to construct graphs for complex designs


Vitis AI Engine DSP Library - Functions

Vitis AI Engine DSP Library is a configurable library of elements that can be used to develop applications on Versal® AI Engines. This is an open-source library for DSP applications. The user entry point for each library function is an L2 level graph. Each entry point graph will contain one or more L1 level kernels and may contain one or more graph objects. Direct use of L1 level kernels or any other graph class not identified as an entry point is not recommended.

Vitis AI Engine DSP Library consists of the following DSP elements:

  • Filters:
    • Single-rate FIRs
    • Half-band interpolation/decimation FIRs
    • Integer and fractional interpolation/decimation FIRs
  • FFT/iFFT
    • Single channel, decimation in time (DIT) implementation
  • Matrix Multiply
    • General matrix multiply
  • Widget API Cast
    • Flexibility when connecting other kernels
  • Widget Real to Complex
    • Utility to convert real data to complex or vice versa
  • DDS / Mixer
    • Direct digital synthesis only mode
    • Mixer

For a full list of available DSP functions, please refer to DSP Library Functions.


Vitis AI Engine DSP Library - Organization

Vitis AI Engine DSP Library consists of DSP algorithms optimized to take full advantage of the processing power of Versal devices, which contain an array of AI Engines.

The library is organized into three types of AI Engine designs:

  • L1 AI Engine kernels
  • L2 AI Engine graphs
  • L3 software APIs

Note: L3 is not yet available

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Vitis Programmable Logic (PL) DSP Library - Introduction

Vitis PL DSP Library implements a discrete Fourier transform using an FFT algorithm for acceleration on AMD Xilinx FPGAs. The library consists of three types of implementations:

  • L1 PL primitives
  • L2 PL kernels
  • L3 software APIs

These implementations are organized in hardware sub-directories of the corresponding L1, L2, and L3 types. 

L1 PL Primitives Can be leveraged by developers working on hardware design implementation or designing hardware kernels for acceleration. Particularly suitable for hardware designers.
L2 PL Kernels HLS-based predesigned kernels that can be directly used for FPGA acceleration of different applications on integration with the Xilinx Runtime (XRT).
L3 Software APIs Provided in C, C++, and Python, which allow software developers to offload FFT calculation to FPGAs for acceleration.

Vitis PL DSP Library - Functions

Vitis PL DSP Library provides a fully synthesizable PL-based SSR FFT as well as a 2-dimensional FFT version. 

  • 1-Dimensional (Line) SSR FFT L1 FPGA Module
    • Provides a fully synthesizable SSR FFT with a systolic architecture to process multiple input samples every clock cycle
    • Enables the number of samples processed in parallel per cycle by the SSR factor
    • Implements as a C++ template function that synthesizes into a streaming architecture
    • Can be parameterized through template parameters
  • 2-Dimensional (Matrix) SSR FFT L1 FPGA Module
    • Provides a fully synthesizable 2-Dimensional FFT as an L1 primitive
    • Transforms into an L2 Vitis environment kernel by adding memory adapters
    • Designed to have an array of stream interfaces as wide as device DDR memory widths on boards, e.g., Alveo™ U200, U250, and U280 cards

For detailed documentation, please refer to: 1-Dimensional (Line) SSR FFT L1 FPGA Module and 2-Dimensional (Matrix) SSR FFT L1 FPGA Module.

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What's New

What’s New in Vitis DSP Library

In 2022.2, Vitis DSP Library adds new features for the AI Engine implementation of DSP functions:

  • SSR FIR filter implementation on AI Engine now supports:
    • Coefficient reload feature
    • Dynamic point size 
  • FFT windowing as an element on the AI Engine function 

Refer to What’s New in the Vitis Software Platform for more details.