| 1. |
- Axelsson, Emil, 1978, et al.
(author)
-
Feldspar: A Domain Specific Language for Digital Signal Processing algorithms
- 2010
-
In: Eighth ACM/IEEE International Conference on Formal Methods and Models for Codesign. - 9781424478859 ; , s. 169-178
-
Conference paper (peer-reviewed)abstract
- A new language, Feldspar, is presented, enabling high-level and platform-independent description of digital signal processing (DSP) algorithms. Feldspar is a pure functional language embedded in Haskell. It offers a high-level dataflow style of programming, as well as a more mathematical style based on vector indices. The key to generating efficient code from such descriptions is a high-level optimization technique called vector fusion. Feldspar is based on a low-level, functional core language which has a relatively small semantic gap to machine-oriented languages like C. The core language serves as the interface to the back-end code generator, which produces C. For very small examples, the generated code performs comparably to hand-written C code when run on a DSP target. While initial results are promising, to achieve good performance on larger examples, issues related to memory access patterns and array copying will have to be addressed.
|
|
| 2. |
- Axelsson, Emil, 1978, et al.
(author)
-
The Design and Implementation of Feldspar: An Embedded Language for Digital Signal Processing
- 2011
-
In: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - Berlin, Heidelberg : Springer Berlin Heidelberg. - 1611-3349 .- 0302-9743. - 9783642242755 ; 6647, s. 121-136
-
Conference paper (peer-reviewed)abstract
- Feldspar is a domain specific language, embedded in Haskell, for programming digital signal processing algorithms. The final aim of a Feldspar program is to generate low level code with good performance. Still, we chose to provide the user with a purely functional DSL. The language is implemented as a minimal, deeply embedded core language, with shallow extensions built upon it. This paper presents full details of the essential parts of the implementation. Our initial conclusion is that this approach works well in our domain, although much work remains.
|
|
| 3. |
- Axelsson, Emil, 1978, et al.
(author)
-
The Design and Implementation of Feldspar: an Embedded Language for Digital Signal Processing
- 2010
-
In: IFL 2010, the 22nd Symposium on Implementation and Application of Functional Languages.
-
Conference paper (other academic/artistic)abstract
- Feldspar is a Domain Specific Language, embedded in Haskell, for programming Digital Signal Processing algorithms. The final aim of a Feldspar program is to generate low level code with good performance. Still, we chose to provide the user with a purely functional DSL. The language is implemented as a minimal, deeply embedded core language, with shallow extensions built upon it. This paper presents full details of the essential parts of the implementation. Our initial conclusion is that this approach works well in our domain, although much work remains.
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
- Carlsson, Per-Anders, 1972, et al.
(author)
-
Periodic control for low-temperature ignition
- 2000
-
In: Proceedings of the 5th International Congress on Catalysis and Automotive Pollution Control (CAPoC5), Brussels, Belgium, April 12-14.
-
Conference paper (peer-reviewed)
|
|
| 8. |
- Dévai, Gergely, et al.
(author)
-
Efficient Code Generation from the High-level Domain-specific Language Feldspar for DSPs
- 2010
-
In: ODES-8: 8th Workshop on Optimizations for DSP and Embedded Systems, workshop associated with IEEE/ACM International Symposium on Code Generation and Optimization (CGO).
-
Conference paper (peer-reviewed)abstract
- Software for digital signal processors (DSPs) is traditionally highly hardware-dependent and hence porting it to new processors usually requires significant design effort. In this paper we present Feldspar (Functional Embedded Language for DSP and Parallelism), an embedded, high-level, domain-specific language for DSP algorithm design and the compilation techniques we developed for generating C code from specifications written in Feldspar. While Feldspar allows description of algorithms on specification level, we show that with the right set of abstractions and transformations this high level, functional specification can be transformed into C code that is comparable or better than reference, hand-crafted C language implementations. The Feldspar compiler is highly modular and plugin-based, hence future hardware-specific plugins will enable automatic generation of efficient, hardware-specific code. This approach enables the encapsulation of knowledge of hardware completely in the compiler and thus allows description of algorithms in completely hardware-independent, portable manner.
|
|
| 9. |
- Janhager, Jenny, et al.
(author)
-
Survey on Product Development Methods, Design Competencies, and Communication in Swedish Industry
- 2002
-
In: Proceedings of TMCE 2002, Tools and Methods of Competitive Engineering.
-
Conference paper (peer-reviewed)abstract
- This article presents the results of a questionnaire survey carried out during the spring of 2000. The results are based on the answers provided by a total of 99 respondents. Among other results the survey revealed that more than half of the responding companies have a formally documented strategy for product development work. Regarding disciplinary competencies, it is shown that design engineers are involved in practically all product development projects. Industrial designers are also widely employed, while ergonomics competence is used in less than half of the projects. Design engineering is the most widely employed competence in product development work for all investigated product development tasks, except for ergonomics and aesthetic design tasks. The latter are most commonly carried out by ergonomists and industrial designers, respectively. Most small companies experience good contact with end users, whereas larger companies appear less successful in that respect. The same result applies to perceived communication with other professional categories, as well as access to information. Most of the respondents including project managers, design engineers and development managers answered they have daily contact with design engineers. Among the same respondents, daily contact with industrial designers and ergonomists is very infrequent. Regarding opinions on the product development process, nearly half of the respondents stated they frequently discuss the use of methods and procedures. One third of the respondents agreed that a better-formulated process description than the currently used would facilitate product development work. It was also concluded that nearly one third of the respondents agreed on having difficulties reflecting upon ongoing work, due to, e.g., lack of time.
|
|
| 10. |
|
|
