Intel® High Level Synthesis Compiler Pro Edition: User Guide

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ID 683456
Date 4/03/2023
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Document Table of Contents
Document Table of Contents x
1. Intel® High Level Synthesis Compiler Pro Edition User Guide 2. Overview of the Intel® High Level Synthesis (HLS) Compiler Pro Edition 3. Creating a High-Level Synthesis Component and Testbench 4. Verifying the Functionality of Your Design 5. Optimizing and Refining Your Component 6. Verifying Your IP with Simulation 7. Synthesize your Component IP with Intel® Quartus® Prime Pro Edition 8. Integrating your IP into a System A. Reviewing the High-Level Design Reports (report.html) B. Intel® HLS Compiler Pro Edition Restrictions C. Intel® HLS Compiler Pro Edition User Guide Archives D. Document Revision History for Intel® HLS Compiler Pro Edition User Guide
1. Intel® High Level Synthesis Compiler Pro Edition User Guide x
1.1. Pending Deprecation of the Intel® HLS Compiler
2. Overview of the Intel® High Level Synthesis (HLS) Compiler Pro Edition x
2.1. High Level Synthesis Design Flow 2.2. The Project Directory
3. Creating a High-Level Synthesis Component and Testbench x
3.1. Intel® HLS Compiler Pro Edition Compiler-Defined Preprocessor Macros
5. Optimizing and Refining Your Component x
5.1. The High-Level Design Reports
6. Verifying Your IP with Simulation x
6.1. Generation of the Verification Testbench Executable 6.2. Debugging during Verification 6.3. High-Throughput Simulation (Asynchronous Component Calls) Using Enqueue Function Calls
6.3. High-Throughput Simulation (Asynchronous Component Calls) Using Enqueue Function Calls x
6.3.1. Execution Model 6.3.2. Comparison of Explicit and Enqueued Function Calls
8. Integrating your IP into a System x
8.1. Adding the HLS Compiler-Generated IP into an Intel® Quartus® Prime Pro Edition Project 8.2. Adding the HLS Compiler-Generated IP into a Platform Designer System
A. Reviewing the High-Level Design Reports (report.html) x
A.1. Reviewing the Summary Report A.2. Reviewing Component Architecture A.3. Reviewing Factors That Affect Throughput A.4. Reviewing Component Area Usage A.5. Accessing HLD FPGA Reports in JSON Format
A.2. Reviewing Component Architecture x
A.2.1. System Viewer A.2.2. Function Memory Viewer A.2.3. Schedule Viewer (Beta)
A.2.1. System Viewer x
A.2.1.1. Reviewing System Information A.2.1.2. Reviewing Function Information A.2.1.3. Reviewing Block Information A.2.1.4. Reviewing Cluster Information
A.2.1.2. Reviewing Function Information x
A.2.1.2.1. Reviewing Component Interfaces A.2.1.2.2. Reviewing Loops and Blocks in Your Component or Task
A.3. Reviewing Factors That Affect Throughput x
A.3.1. Loop Analysis Report A.3.2. Loops Viewer (Alpha) A.3.3. Verification Statistics Report
1. Intel® High Level Synthesis Compiler Pro Edition User Guide
2. Overview of the Intel® High Level Synthesis (HLS) Compiler Pro Edition
3. Creating a High-Level Synthesis Component and Testbench
4. Verifying the Functionality of Your Design
5. Optimizing and Refining Your Component
6. Verifying Your IP with Simulation
7. Synthesize your Component IP with Intel® Quartus® Prime Pro Edition
8. Integrating your IP into a System
A. Reviewing the High-Level Design Reports (report.html)
B. Intel® HLS Compiler Pro Edition Restrictions
C. Intel® HLS Compiler Pro Edition User Guide Archives
D. Document Revision History for Intel® HLS Compiler Pro Edition User Guide

6.3. High-Throughput Simulation (Asynchronous Component Calls) Using Enqueue Function Calls

An explicit call to a component in simulation is a blocking call. To be consistent with C++ language conventions, the testbench waits for a return value from the component before continuing execution. This blocking call results in serial execution of the component. You can test how well successive invocations of your component can be pipelined by queuing inputs to the component before executing the component. You can queue inputs to a component that has explicit interfaces by using enqueue function calls from the simulation library. Estimate the throughput of your component by dividing the component fMAX by the component initiation interval (II), which indicates approximately how many times your component is invoked per second.
Table 6.  Functions from Simulation Library for Queuing Inputs to the Component with Explicit Interfaces
Function Description
ihc_hls_enqueue(void* retptr, void* funcptr, …) This function enqueues one invocation of an HLS component.

The return value is stored in the first argument which should be a pointer to the return type.

The component does not execute until the ihc_hls_component_run_all() function is invoked.

ihc_hls_enqueue_noret(void* funcptr, …) This function is similar to ihc_hls_enqueue(void* retptr, void* funcptr, …), except that it does not have an output pointer to capture return values.
ihc_hls_component_run_all (void* funcptr) This function executes all enqueued calls to the specified component in a pipelined fashion.

Section Content
Execution Model
Comparison of Explicit and Enqueued Function Calls

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