Altera Corporation

Intel Corporation

John Stuart Freeman

Deshanand Pratap Singh

Tomasz Czajkowski

Byron Sinclair

Peter Yiannacouras

Gordon Raymond Chiu

Dmitry Nikolai Denisenko

Valavan Manohararajah

Davor Capalija

David Neto

Andrew Ling

Andrei Mihai Hagiescu Miriste

Alan Baker

Dirk Seynhaeve

Tian Yi David Han

Methods and apparatus for performing profile-guided optimization of integrated circuit hardware are provided. Circuit design tools may receive a source code and compile the source code to generate a hardware description. The hardware description may include profiling blocks configured to measure useful information required for optimization. The hardware description may then be simulated to gather profiling data. The circuit design tools may then analyze the gathered profiling data to identify additional opportunities for hardware optimization. The source code may then be modified based on the analysis of the profiling data to produce a smaller and faster hardware that is better suited to the application.

Methods and apparatus for profile-guided optimization of integrated circuits

A method for designing a system on a target device includes performing high-level compilation on a high-level language source file to generate a hardware description language (HDL) of the system and a serial testbench for the system. Verification is performed on the system that examines a parallel nature of the system by using the serial testbench.

Method and apparatus for supporting automatic testbench parallelism and serial equivalence checking during verification

A method of compiling program code includes determining if the program code controls a programmable logic device to execute other program code. The program code is a parallel program having a barrier function call for a group of threads. If it is determined that program code is to control the programmable logic device, then the program code is transformed by replacing the barrier function call with control logic inserted into the program code such that the transformed program code remains a parallel program and maintains synchronization among the group of threads. A compiler system that compiles program code with a barrier function call for a group of threads is also described.

M/A for compiling parallel program having barrier synchronization for programmable hardware

The present embodiments relate to interface circuitry between a serial interface circuit and an array of processing elements in an integrated circuit. The interface circuitry may include a daisy chain of feeder circuits and a daisy chain of drain circuits. If desired, the interface circuitry may include multiple daisy chains of feeder circuits and/or multiple daisy chains of drain circuits. These multiple daisy chains of feeder circuits and drains circuits may be coupled in parallel, respectively. In some embodiments, the interface circuitry may include synchronization circuitry that is coupled between the daisy chains of drain circuits and the serial interface circuit. Pipeline register stages between feeder circuits and/or between drain circuits may enable the placement of the feeder circuits and/or the drain circuits spatially close to the processing elements of the array of processing elements.

Interface circuitry for parallel computing architecture circuits

Systems and methods for generating and deploying integrated circuit (IC) applications are provided. Global variable implementation logic may be used to optimize implementation, on an integrated circuit, of functionality represented by high-level code including global variables. A compiler's intermediate representation is analyzed for one or more characteristics that may be used to determine one or more initialization parameters, one or more scope parameters, one or more implementation parameters, or any combination thereof of the functionality. An HDL is generated based upon the one or more initialization parameters, the one or more scope parameters, the one or more implementation parameters, or the any combination thereof.

Global variable optimization for integrated circuit applications

A method for designing a system on a target device includes describing the system in a high-level synthesis language where the system includes a configurable clock to drive the system at a specified clock frequency. A hardware description language (HDL) of the system is generated from the high-level synthesis language. An initial compilation of the HDL of the system is performed in response to the specified clock frequency. Timing analysis is performed on the system after the initial compilation of the HDL to determine a maximum frequency which the system can be driven. The configurable clock is programmed to drive the system at the maximum frequency.

Method and apparatus for satisfying operating conditions in a system design using an electronic design automation tool

Systems and methods for explicit organization of memory allocation on an integrated circuit (IC) are provided. In particular, a programmable logic designer may incorporate specific mapping requests into programmable logic designs. The mapping requests may specify particular mappings between one or more data blocks (e.g., memory buffers) of a host program to one or more physical memory banks.

Guided memory buffer allocation

A method of programming or configuring an integrated circuit device using a high-level language includes parsing a logic flow to be embodied in the integrated circuit device to identify invariant logic flow, converting the invariant logic flow into separate instruction blocks, incorporating the separate instruction blocks into a high-level language representation of a configuration of resources of the integrated circuit device, and compiling the high-level language representation to configure said integrated circuit device. The high-level language representation can be executed to generate a configuration bitstream for the programmable integrated circuit device, or can be run on a processor on the programmable integrated circuit device to instantiate the configuration.

Invariant code optimization in high-level FPGA synthesis

Systems and methods for enhancing performance of programs implemented on an integrated circuit (IC) are provided. A forward-flow selector may determine a common branch for adding a data set to and removing a data set from. By selecting a common branch for adding and removing a data set, there will be a pipeline stage for data flowing into the branch. Accordingly, the embodiments described herein enhance throughput by increasing the number of datasets that may enter a branched pipeline without stalling.

Forward-flow selection

Systems and methods for offloading computations of an integrated circuit (IC) to a processor are provided. In particular, a programmable logic designer, compiler, etc. may dictate particular logic to offload to a processor. This offloading may enhance programmable logic area utilization and/or increase throughput.

Integrated circuit processing via offload processor

Systems and methods for limiting resource usage of a kernel of an integrated circuit are provided. For example, in one embodiment a method for limiting a number of workgroups that may simultaneously access a kernel of an integrated circuit (IC) includes determining a threshold number of workgroups that may access the kernel simultaneously. A thread of execution is received. The thread of execution is allowed to access the kernel when the threshold number of workgroups would not be exceeded by the thread of execution accessing the kernel.

Workgroup handling in pipelined circuits

Systems and methods for increasing speed and reducing area for arbitration logic in an integrated circuit (IC) are provided. For example, in one embodiment, a method includes arbitrating at least one master request in a first level of arbitration blocks. A second level of arbitration blocks arbitrates at least two arbitration blocks from the first level. A first level of multiplexers multiplex at least one master payload based at least in part upon the arbitration of the first level of arbitration blocks. A second level of multiplexers multiplex at least two signals propagated from the first level of multiplexers.

Hierarchical arbitration

A method for optimizing a system on a target device is disclosed. A LUT is unpacked to form a plurality of LUTs of a smaller size upon determining that the unpacking can satisfy one or more predefined objectives. The plurality of LUTs are repacked such that the design for the system is improved. Other embodiments are disclosed.

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Toronto, Canada

John Stuart Freeman