Intel® FPGA AI Suite: IP Reference Manual

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ID 768974
Date 7/03/2023
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Document Table of Contents
Document Table of Contents x
1. Intel® FPGA AI Suite IP Reference Manual 2. About the Intel® FPGA AI Suite IP 3. Intel® FPGA AI Suite IP Generation Utility 4. Intel® FPGA AI Suite Ahead-of-Time Splitter Utility 5. CSR Map and Descriptor Queue A. Intel® FPGA AI Suite IP Reference Manual Archives B. Intel® FPGA AI Suite IP Reference Manual Document Revision History
2. About the Intel® FPGA AI Suite IP x
2.1. Supported Models 2.2. Model Performance 2.3. Intel® FPGA AI Suite Layer / Primitive Ranges 2.4. Intel® FPGA AI Suite IP Block Configuration 2.5. IP Block Interfaces
2.1. Supported Models x
2.1.1. MobileNet V2 differences between Caffe and TensorFlow models
2.2. Model Performance x
2.2.1. Throughput on the MobileNetV1 model (and other very fast models)
2.4. Intel® FPGA AI Suite IP Block Configuration x
2.4.1. Architecture Description File Format for Instance Parameterization 2.4.2. Architecture Description File Parameters
2.4.2. Architecture Description File Parameters x
2.4.2.1. Parameter group: Global Parameters 2.4.2.2. Parameter group: activation 2.4.2.3. Parameter group: pe_array 2.4.2.4. Parameter group: pool 2.4.2.5. Module: softmax 2.4.2.6. Parameter group: dma 2.4.2.7. Parameter group: xbar 2.4.2.8. Parameter group: filter_scratchpad 2.4.2.9. Parameter group: config_network
2.5. IP Block Interfaces x
2.5.1. Clock and Reset 2.5.2. AXI Interfaces 2.5.3. AXI Interface Clock and Reset 2.5.4. Input Feature Tensor In-Memory Format 2.5.5. Output Tensor In-Memory Format
2.5.4. Input Feature Tensor In-Memory Format x
2.5.4.1. Multiple Input Graphs 2.5.4.2. Input Folding 2.5.4.3. Input Scale and Shift 2.5.4.4. Input Transform Mapping
3. Intel® FPGA AI Suite IP Generation Utility x
3.1. IP Generation Utility Execution Flows 3.2. IP Generation Utility Inputs 3.3. IP Generation Utility Outputs 3.4. IP Generation Utility Command Line Options
3.4. IP Generation Utility Command Line Options x
3.4.1. The --flow create_ip Flow 3.4.2. The --flow add_arch Flow 3.4.3. The --flow list Flow 3.4.4. The --flow remove_arch Flow
4. Intel® FPGA AI Suite Ahead-of-Time Splitter Utility x
4.1. Files Generated by the Intel® FPGA AI Suite Ahead-of-Time (AOT) Splitter Utility 4.2. Building the Intel® FPGA AI Suite Ahead-of-Time (AOT) Splitter Utility 4.3. Running the Intel® FPGA AI Suite Ahead-of-Time (AOT) Splitter Utility 4.4. Intel® FPGA AI Suite Ahead-of-Time (AOT) Splitter Utility Example Application
5. CSR Map and Descriptor Queue x
5.1. Discovery ROM 5.2. Interrupt Control 5.3. DMA Descriptor Queue 5.4. DMA Control Registers 5.5. Performance Registers
1. Intel® FPGA AI Suite IP Reference Manual
2. About the Intel® FPGA AI Suite IP
3. Intel® FPGA AI Suite IP Generation Utility
4. Intel® FPGA AI Suite Ahead-of-Time Splitter Utility
5. CSR Map and Descriptor Queue
A. Intel® FPGA AI Suite IP Reference Manual Archives
B. Intel® FPGA AI Suite IP Reference Manual Document Revision History

2.5.4. Input Feature Tensor In-Memory Format

Input features are stored in FP16 format. FP16 format has 1 sign bit, 10 mantissa bits, and 5 exponent bits. The input features are converted by the IP hardware to its native format using a round to nearest, ties to even (RNE) rounding rule.

Feature elements are packed into CVEC-sized chunks in the channel dimension from low to high. The final CVEC chunk, at a given (d,h,w), is padded with zeros. The CVEC chunks are stored in NCDHW format. The order is as follows: batch, channel, depth, height, width, and CVEC, where CVEC is the fastest changing index and batch the slowest.

The following figure shows a sample memory layout for a 1×3×1×2×2 input tensor to a CVEC=2 architecture:

Figure 3. Input Tensor In-Memory Layout

Section Content
Multiple Input Graphs
Input Folding
Input Scale and Shift
Input Transform Mapping

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