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<p>Very Long Instruction Word (VLIW) architectures can enhance performance by exploiting fine-grained instruction level parallelism. In this paper, we describe a compiler assisted multiple instruction word retry scheme for VLIW architectures. A read buffer is used to resolve the more frequent on-path hazards, while the compiler resolves the remaining branch hazards. Performance evaluation is described for 11 benchmark programs based on the IBM VLIW research compiler, <it>Chameleon</it>. Experimental results indicate that, for a VLIW machine with P functional units to rollback N instruction words, a read buffer of 2NP entries with the compiler assist can be an effective approach in producing low overhead runtime performance and small code growth, for P = 4, 8, 12, and 16 and N \leq 3.</p>
Fault-tolerant computing, instruction retry, compilers, VLIW architectures, instruction level parallelism

S. Chen and W. Fuchs, "Compiler-Assisted Multiple Instruction Word Retry for VLIW Architectures," in IEEE Transactions on Parallel & Distributed Systems, vol. 12, no. , pp. 1293-1304, 2001.
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