IMPACT

Pohua P. Chang, Scott A. Mahlke, William Y. Chen, Nancy J. Warter, Wen-mei W. Hwu
<span title="1991-05-01">1991</span> <i title="Association for Computing Machinery (ACM)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/35q3ync5nbhnjfpylznlz57lyi" style="color: black;">SIGARCH Computer Architecture News</a> </i> &nbsp;
The performance of multiple-instruction-issue processors can be severely limited by the compiler's ability to generate e cient code for concurrent hardware. In the IM-PACT project, we h a v e developed IMPACT-I, a highly optimizing C compiler to exploit instruction level concurrency. The optimization capabilities of the IMPACT-I C compiler are summarized in this paper. Using the IMPACT-I C compiler, we ran experiments to analyze the performance of multiple-instruction-issue processors executing
more &raquo; ... some important non-numerical programs. The multiple-instruction-issue processors achieve solid speedup over high-performance single-instruction-issue processors. We ran experiments to characterize the following architectural design issues: code scheduling model, instruction issue rate, memory load latency, and function unit resource limitations. Based on the experimental results, we propose the IMPACT Architectural Framework, a set of architectural features that best support the IMPACT-I C compiler to generate e cient code for multiple-instructionissue processors. By supporting these architectural features, multiple-instruction-issue implementations of existing and new architectures receive immediate compilation support from the IMPACT-I C compiler.
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