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Frontiers in Education (FIE) conference

作者： Bryan J. Mealy Electrical Engineering Department Computer Engineering Program California Polytechnic State University San Louis Obispo CA USA

the flexibility of programmable logic devices (PLDs) and their supporting CAD (computer aided design) tools make PLDs ideal for digital systems design courses. this paper outlines a computer design-based course and supporting laboratory targeted for students with intermediate-level digital design skills. the unifying theme of this course is the design, implementation, and programming of a relatively complex microcontroller (MCU). this course emphasizes the development and subsequent integration of basic individual computer building blocks using a hardware description language (HDL). the major topics in the course include finite state machine (FSM) design, computer system architecture, and assembly language programming. Placing emphasis on a hierarchical design approach and ensuring continuity in the course topics reduces potential difficulties in presenting this scope of topics

关键词： Digital systems Hardware design languages Assembly Microcontrollers Computer architecture Digital circuits Programmable logic devices design automation Laboratories Automata

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Embedding domain specific languages in the attribute grammar formalism

Embedding domain specific languages in the attribute grammar...

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Annual Hawaii International conference on System Sciences (HICSS)

作者： J. Saraiva S. Schneider Department of Informatics Universidade do Minho Portugal Department of Informatics Universidade Federal de Uberlâandia Brazil

this paper presents techniques for the design and implementation of domain specific languages. Our techniques are based on higher-order attribute grammars. Formal languages are specified in the classical attribute formalism and domain specific languages are embedded in the specification via higher-order attributes. We present a domain specific language for pretty-printing and we show how such language can be easily embedded in the specification of a powerful spreadsheet-like tool. From such specification an incremental implementation is automatically derived and the first results are presented.

关键词： Domain specific languages DSL Informatics Libraries Writing Formal languages programming environments Power generation Buildings Plugs

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An open implementation analysis and design for lightweight threads 97

An open implementation analysis and design for lightweight t...

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proceedings of the 12th acm sigplan conference on Object-oriented programming, systems, languages, and applications

作者： Matthew Haines Department of Computer Science University of Wyoming

ISBN: (纸本)9780897919081

Open implementation Analysis and design (OIA/D) has been introduced as a design methodology for object-oriented software systems, and in particular for substrate software. In this paper we detail our experiences with using OIA/D to design and implement a common substrate component for parallel language runtime systems: a lightweight threads package. We show how existing thread packages employ a "black-box" design, hiding crucial design decisions that drastically reduce their ability to be re-used. We detail these design decisions (dilemmas) and show how an implementation based on OIA/D principles results in a thread package that is flexible, efficient, portable, and re-usable.

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A dynamic optimization framework for a Java just-in-time compiler 01

A dynamic optimization framework for a Java just-in-time com...

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acm sigplan conference on Object-oriented programming, Systems, languages, and Applications

作者： Toshio Suganuma Toshiaki Yasue Motohiro Kawahito Hideaki Komatsu Toshio Nakatani IBM Tokyo Research Laboratory 1623-14 Shimoturuma Yamato-shi Kanagawa 242-8502 Japan

ISBN: (纸本)1581133359

the high performance implementation of Java Virtual Machines (JVM) and just-in-time (JIT) compilers is directed toward adaptive compilation optimizations on the basis of online runtime profile information. this paper describes the design and implementation of a dynamic optimization framework in a production-level Java JIT compiler. Our approach is to employ a mixed mode interpreter and a three level optimizing compiler, supporting quick, full, and special optimization, each of which has a different set of tradeoffs between compilation overhead and execution speed. a lightweight sampling profiler operates continuously during the entire program's exectuion. When necessary, detailed information on runtime behavior is collected by dynmiacally generating instrumentation code which can be installed to and uninstalled from the specified recompilation target code. Value profiling with this instrumentation mechanism allows fully automatic code specialization to be performed on the basis of specific parameter values or global data at the highest optimization level. the experimental results show that our approach offers high performance and a low code expansion ratio in both program startup and steady state measurements in comparison to the compile-only approach, and that the code specialization can also contribute modest performance improvement

关键词： just in time compiler Java Java programming language HIGH-PERFORMANCE tradeoffs performance boost Runtime Codes Collected papers

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Java virtual machine design based on hybrid concurrent compilation model

Proceedings of the Conference on Technology of Object-Orient...

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proceedings of the conference on Technology of Object-Oriented languages and Systems, TOOLS 2000年第TOOL 36期 18-23页

作者： Zheng, Weimin Zheng, Fengzhou Yang, Bo Wang, Yanling Tsinghua Univ Beijing China

the shift from interpretation to Just-In-Time compilation has improved Java's performance largely. However, further amelioration is still possible. A new execution model of Java - hybrid concurrent compilation model (HCCM) is proposed in this paper, which possesses the potential to surpass JIT by overlapping the production of native code with program execution through multithreaded control. We also present the design of our ongoing HCCM-based Java Virtual Machine, discuss some new-emerged technical issues in the implementation of such a Java VM and make some prediction about its performance.

关键词： Java programming language

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Mirrors: design principles for meta-level facilities of object-oriented programming languages 04

Mirrors: design principles for meta-level facilities of obje...

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proceedings of the 19th annual acm sigplan conference on Object-oriented programming, systems, languages, and applications

作者： Gilad Bracha David Ungar Sun Microsystems Santa Clara CA Sun Microsystems Mountain View CA

We identify three design principles for reflection and metaprogramming facilities in object oriented programming languages. Encapsulation: meta-level facilities must encapsulate their implementation. Stratification: m... 详细信息

ISBN: (纸本)9781581138313

We identify three design principles for reflection and metaprogramming facilities in object oriented programming languages. Encapsulation: meta-level facilities must encapsulate their implementation. Stratification: meta-level facilities must be separated from base-level functionality. Ontological correspondence: the ontology of meta-level facilities should correspond to the ontology of the language they manipulate. Traditional/mainstream reflective architectures do not follow these precepts. In contrast, reflective APIs built around the concept of mirrors are characterized by adherence to these three principles. Consequently, mirror-based architectures have significant advantages with respect to distribution, deployment and general purpose metaprogramming.

关键词： smalltalk mirrors java metaprogramming reflection self

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Making the future safe for the past: adding genericity to the Java programming language 98

Making the future safe for the past: adding genericity to th...

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proceedings of the 13th acm sigplan conference on Object-oriented programming, systems, languages, and applications

作者： Gilad Bracha Martin Odersky David Stoutamire Philip Wadler Sun Microsystems University of South Australia Bell Labs Lucent Technologies

ISBN: (纸本)9781581130058

We present GJ, a design that extends the Java programming language with generic types and methods. these are both explained and implemented by translation into the unextended language. the translation closely mimics the way generics are emulated by programmers: it erases all type parameters, maps type variables to their bounds, and inserts casts where needed. Some subtleties of the translation are caused by the handling of *** increases expressiveness and safety: code utilizing generic libraries is no longer buried under a plethora of casts, and the corresponding casts inserted by the translation are guaranteed to not *** is designed to be fully backwards compatible with the current Java language, which simplifies the transition from non-generic to generic programming. In particular, one can retrofit existing library classes with generic interfaces without changing their *** implementation of GJ has been written in GJ, and is freely available on the web.

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Parametric polymorphism for Java: a reflective solution 98

Parametric polymorphism for Java: a reflective solution

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proceedings of the 13th acm sigplan conference on Object-oriented programming, systems, languages, and applications

作者： Jose H. Solorzano Suad Alagić Computer Science Department Wichita State University Wichita KS

ISBN: (纸本)9781581130058

A number of inadequacies of existing implementation techniques for extending Java™ with parametric polymorphism are revealed. Homogeneous translations are the most space-efficient but they are not compatible with reflection, some models of persistence, and multiple dispatch. Heterogeneous translations, on the other hand, can potentially produce large amounts of redundant information. implementation techniques that address these concerns are developed. In languages that support run-time reflection, an adequate implementation of parametric, bounded and F-bounded polymorphism is shown to require (reflective) run-time support. In Java, extensions to the core classes are needed. this is in spite of the fact that parametric polymorphism is intended to be managed statically.

关键词： language design and implementation reflection persistence

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Pluggable AOP: designing aspect mechanisms for third-party composition 05

Pluggable AOP: designing aspect mechanisms for third-party c...

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proceedings of the 20th annual acm sigplan conference on Object-oriented programming, systems, languages, and applications

作者： Sergei Kojarski David H. Lorenz University of Virginia Charlottesville VA

ISBN: (纸本)9781595930316

Studies of Aspect-Oriented programming (AOP) usually focus on a language in which a specific aspect extension is integrated with a base language. languages specified in this manner have a fixed, non-extensible AOP functionality. this paper argues the need for AOP to support the integration and use of multiple domain-specific aspect extensions together. We study the more general case of integrating a base language with a set of third-party aspect extensions for that language. We present a general mixin-based semantic framework for implementing dynamic aspect extensions in such a way that multiple, independently developed aspect mechanisms can be subject to third-party composition and work collaboratively. Principles governing the design of a collaborative aspect mechanism are aspectual effect exposure and implementation hiding.

关键词： aspectual effect aspect mechanism COOL domain-specific aspect language collaboration AOP reuse AspectJ AOP semantics third-party composition mixin aspect extension software components CBSE AOSD AspectWerkz

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Formal behavioural synthesis of Handel-C parallel hardware implementations from functional specifications

Formal behavioural synthesis of Handel-C parallel hardware i...

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Annual Hawaii International conference on System Sciences (HICSS)

作者： A.E. Abdallah J. Hawkins South Bank University London UK

Enormous improvements in efficiency can be achieved through exploiting parallelism and realizing implementation in hardware. On the other hand, conventional methods for achieving these improvements are traditionally costly, complex and error prone. Two significant advances in the past decade have radically changed these perceptions. Firstly, the FPGA, which gives us the ability to reconfigure hardware through software, dramatically reducing the costs of developing hardware implementations. Secondly, the language Handel-C with primitive explicit parallelism which can compile programs down to an FPGA. In this paper, we build on these recent technological advances and present a systematic approach of behavioural synthesis. Starting with an intuitive high level functional specification of a problem, given without annotation of parallelism, the approach aims at deriving an efficient parallel implementation in Handel-C, which is subsequently compiled into a circuit implemented on reconfigurable hardware. Algebraic laws are systematically used for exposing implicit parallelism and transforming the specification into a collection of interacting components. Formal methods based on data refinement and a small library of higher order functions are then used to derive behavioural description in Handel-C of each component. A small case study illustrates the use of this approach.

关键词： Hardware Field programmable gate arrays Costs Algorithm design and analysis Circuit synthesis Application software High level languages programming profession Art Functional programming

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