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Pré-Publication, Document De Travail Année : 2019

Application-specific arithmetic in high-level synthesis tools

Résumé

This work studies hardware-specific optimization opportunities currently unexploited by HLS compilers. Some of these optimizations are specializations of floating-point operations that respect the usual semantics of the input program, without changing the numerical result. Some other optimizations, locally triggered by the programmer thanks to a pragma, assume a different semantics, where floating-point code is interpreted as the specification of computation with real numbers. The compiler is then in charge to ensure an application-level accuracy constraint expressed in the pragma, and has the freedom to use non-standard arithmetic hardware when more efficient. These two classes of optimizations are prototyped in the GeCoS source-to-source compiler, and evaluated on the Polybench and EEMBC benchmark suites. Latency is reduced by up to 93%, and resource usage is reduced by up to 58%.
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Dates et versions

hal-02423363 , version 2 (09-07-2019)
hal-02423363 , version 3 (17-10-2019)
hal-02423363 , version 1 (27-12-2019)

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Yohann Uguen, Florent de Dinechin, Victor Lezaud, Steven Derrien. Application-specific arithmetic in high-level synthesis tools. 2019. ⟨hal-02423363v1⟩
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