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The PQCC experience reveals that—contrary to common practice and belief—retargetability and a high level of optimization are not incompatible.

An overview of and survey solutions to the problem of instruction scheduling for pipelined computers are provided. The author demonstrated that dynamic instruction scheduling can provide performance improvements not possible with static scheduling alone. He describes a high-performance computer, the Astronautics ZS-1, which uses novel methods for implementing dynamic scheduling and which can outperform computers using similar-speed technologies that rely solely on state-of-the-art static scheduling techniques. >