Piperench a reconfigurable architecture and compiler software

This survey covers two aspects of reconfigurable computing. A compiler framework for mapping applications to a coarse. Towards that end, my students and i have developed piperench, which is a scalable, forwardcompatible architecture for reconfigurable computing. Since the introduction of the first reconfigurable devices in 1985 the field of reconfigurable computing developed a broad variety of architectures from finegrained to coarsegrained types. A continuously reconfigurable processor continuously reconfigurable approach provides. A fully pipelined and dynamically composable architecture of cgra. The paper includes recent advances in reconfigurable architectures, such as the alters stratix ii and xilinx virtex 4 fpga devices. The logical size of a virtual pipeline is unbounded, and it can be executed on a compatible architecture of any size 4. This paper gives a survey of a novel programming method for reconfigurable architectures.

Exploiting ilp, tlp, and dlp with the polymorphous trips. However, the main disadvantages of the reconfigurable approaches, the costs in area, and power consumption, are still present. Baring it all to software waingold, ieee computer 00 ultrafine grained homogeneous piperench reconfigurable architecture and compiler goldstein, ieee computer 00 heterogeneous. Piperench piperench is a reconfigurable computing chip developed at carnegie mellon university. How many steps or stages or phases are there which will be done by the compiler in case of compiling a java file. Now the main question is how exactly java compiler works. A system using a reconfigurable fabric such as piperench can. Combined with a traditional digital signal processor. Piperench 18 is an interconnection network of configurable logic and storage elements. The piperench architecture, chip design, simulation tools, compiler, and assembler were all produced by faculty and students in the ece department and the school of computer science. Multiobjective hardwaresoftware partitioning technique for. Piperench proceedings of the 26th annual international.

Fault tolerance in runtime reconfigurable architectures. This contribution presents a solution for applicationdriven adaptation of our. Piperench and its associated compiler comprise the authors new. Polymorphous trips architecture exploiting ilp, tlp, and dlp. Piperench is a runtime reconfigurable fpga that manages a virtual pipeline, allowing timemultiplexed use of the physical pipeline stages. Piperench enables fast, robust compilers, supports forward compatibility, and.

An execution model for hardwaresoftware compilation and its. A survey of coarsegrain reconfigurable architectures and. Plasticine architecture simplifies compiler mapping and improves execution efficiency. The baseline architecture is based on the adres architecture described in 3,15. As a focus point for our research, we are investigating the integration of processors and reconfigurable logic see reconfigurable processor. Reconfigurable computing codes algorithms in hardware that can be modified nearly as easily as software. This paper describes a novel reconfigurable fabric architecture, piperench, optimized to accelerate. Has complete tool set, including highlevel entry language. Callahan, the garp architecture and c compiler, 2000 callahan, hauser, wawrzynek, ucb, 2000. Runtime support for dynamically reconfigurable computing systems. A coarsegrained reconfigurable architecture with compilation. This promises to reduce the tension between hardware and software, and to increase the efficiency of computer systems, especially if computationally complex algorithms are coded onto reconfigurable hardware. Modular reconfigurable architecturemai, isca 01 finegrained homogeneous raw. An applicationdriven online adaptive reconfigurable.

A radically distinct architecture is the piperench goldstein et al. It combines techniques from vectorizing compilers, highlevel synthesis, and hardware software codesign. Berkeley reconfigurable architectures, systems, and software. Piperenchs compiler is able to compile the static design into a set of virtual stages such that each virtual stage can be mapped to any physical pipeline stage in the rpf. An automated programming flow for a risc processor with. The reconfigurable logic, for example, an field programmable gate arrays fpga, can usually be adapted during the runtime of an application to perform different tasks. The computational efficiency of direct logic implementations in asics all the flexibility of microprocessors pure software unique architecture enables the array to be effectively targeted by an ansi standard c compiler. Architectural design is of crucial importance in software engineering during which the essential requirements like reliability, cost, and performance are dealt with. A reconfigurable architecture and compiler by seth copen goldstein, herman schmit, mihai budiu, srihari cadambi, matt moe, r. Section 4 presents the results of our exploration of the piperench design space as well as diearea estimates of selected designs. This paper describes a novel reconfigurable fabric architecture, piperench, optimized to accelerate these types of computations. Us8276120b2 reconfigurable coprocessor architecture.

Combined with a traditional digital signal processor, microcontroller, or generalpurpose processor, piperench can support a systems various computing needs without requiring custom hardware. Reconfigurable computing architectures sciencedirect. To adapt to small and largegrain concurrency, the trips architecture contains. The rhyma architecture that we have presented is a form of coprocessor based design. The garp architecture resembles an fpga and comes with a mipsiilike host and, for acceleration of specific loops or subroutines, a 32 by 24 ra of lutbased 2 bit pes. Section 3 describes our piperench icop design and how icop applications are implemented in this design. Basic unit of its primarily meshbased architecture is a row of 32 pes, a reconfigurable alu. We describe the polymorphous trips architecture, which can be configured for different granularities and types of parallelism. As shown in figure 1, this architecture consists of a reconfigurable array coupled with a generalpurpose vliw processor. Generalpurpose processors are struggling to efficiently meet these applications disparate needs, and custom hardware is rarely feasible.

Trips contains mechanisms that enable the processing cores and the onchip memory system to be configured and combined in different modes for instruction, data, or threadlevel parallelism. A novel adlbased compiler centric software framework for reconfigurable mixedisa processors. The exemplary embodiment is for an architecture integrated in a generic system on chip soc and consisting of reconfigurable coprocessors for executing nested program loops performed in a functional unit array in parallel. I hope to expand the list to include the software projects undertaken in the reconfigurable computing field, including cocompilation, par and task allocationscheduling ones. Implementation of a target recognition application using. Mapping of the dags on a reconfigurable array organized in rows pipelining of the dags elementary operators mapped on luts imperative computing pattern. The onchip, banked scratchpads are configurable to support. Any feedback is appreciated, be it on new developments, updates to listed entries or even corrections to erroneous fields. A presentation of the prototype chip of this architecture designed in 90 nm standard cell. The piperench architecture represents a new direction for fpgas. Reconfigurable computing is a computer architecture combining some of the flexibility of software with the high performance of hardware by processing with very flexible high speed computing fabrics like fieldprogrammable gate arrays fpgas. It has configurable fabric that performs a specific datadominated task, such as image processing or pattern matching, quickly as a dedicated piece of hardware. With the proliferation of highly specialized embedded computer systems has come a diversification of workloads for computing devices. Compilation and pipeline synthesis for reconfigurable.

We propose a fast data relay fdr mechanism to enhance existing cgra coarsegrained reconfigurable architecture. One cell in the rapidi reconfigurable architecture ebeling et al. Piperench implementation of the instruction path coprocessor. Reconfigurable computing systems normally consist of an instructionset processor connected to a block of reconfigurable logic. Thus, the resulting rpf architecture is both partially and dynamically reconfigurable. Reconfigurable computing is becoming increasingly attractive for many applications. Fdr can not only provide multicycle data transmission in concurrent with computations but also convert resourcedemanding interprocessingelement global data accesses into local data accesses to avoid communication congestion. The platform is aimed at application developers using software languages and methodologies. The authors describe the piperench architecture and how it solves some of the preexisting. Piperench and its associated compiler comprise the authors new architecture for reconfigurable computing. My students have designed the architecture, including a detailed simulation model, an applications program interface, and are currently finishing the design of a largescale implementation of the. In proceedings of the international conference on embedded computer systems. Additionally, they guide the selection of hardwaresoftware execu.

Combined with a traditional digital signal processor, microcontroller or generalpurpose processor, piperench can support a systems various computing needs without requiring custom hardware. Reconfigurable architecture is a computer architecture combining some of the flexibility of software with the high performance of hardware. The binarylevel partitioning technique 5 was provided a good solution compared to sourcelevel partitioning methods due to the functionality of any highlevel language and software compiler. The compiler comrade accepts full ansi c and compiles it into hybrid hardware software applications for execu tion on a reconfigurable adaptive computer system. The data arrays are accessed from one or more system inputs and from an embedded memory array in parallel. Hauck, reconfigurable computing a survey of systems and software, in acm computing surveys, vol. A survey of coarsegrain reconfigurable architectures and cad. The first category includes among others, the garp, napa, molen, remarc, and piperench 37. A survey of coarsegrained reconfigurable architecture and. Piperench enables fast, robust compilers, supports forward compatibility, and virtualizes. A reconfigurable architecture for parallel patterns. The compiler can map inner loop computation to one pcu such that most operands are transferred directly between functional units without scratchpad accesses or interpcu communication.