InstrGen (Instruction Generator)

Tool

InstrGen is documented here as an instruction-generation tool role for processor verification. The available evidence describes instruction generators that produce long or endless instruction streams, including a static random generator and a Coverage-guided Aging variant used in cross-level processor verification.

First seen 5/29/2026

Last seen 5/30/2026

Evidence 4 chunks

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WIKI

Overview

InstrGen (Instruction Generator) is a tool entity associated with the role of an instruction stream generator. In the available evidence, instruction generators are discussed in the context of cross-level processor verification, where the generated workload is treated as an endless instruction stream rather than as isolated test cases. This makes adaptive generation important, because readjustment after each individual run is not available in the same way as it is for finite test cases.

Generator behavior described in the evidence

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NEIGHBORHOOD

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RELATIONSHIPS

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Instruction Stream Generator implements → 90% 1e

InstrGen is the concrete implementation of the instruction stream generator concept.

LINKED ENTITIES

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Instruction Stream Generator IMPLEMENTS Extracted graph relationship

CITATIONS

6 sources

6 citations — click to expand

[1] The available evidence discusses instruction generators in cross-level processor verification, including an endless instruction-stream setting where adjustment over time is important. Cross-Level Processor Verification via

[2] The random generator is described as a re-implementation of a prior test generator with strong bug-hunting capability, but it can favor specific test-state spaces because its randomized strategy is static. Cross-Level Processor Verification via

[3] In the reported cross-coverage results, the random generator produced substantial peaks and gaps across combinations of instruction groups, while Coverage-guided Aging produced a more balanced distribution with all groups visibly executed. Cross-Level Processor Verification via

[4] Coverage points in the study are defined as a cross product of instruction groups, and deterministic random sources initialized with the same cryptographic seed were used to provide the same random sequences. Cross-Level Processor Verification via

[5] The case study reports that Coverage-guided Aging closed gaps, achieved a more regular coverage distribution, and found another intricate micro-architectural bug in an already heavily tested industrial processor. Cross-Level Processor Verification via

[6] The reported bug involved pipeline execute-FIFO behavior and could be triggered when too many invalid instructions occurred in succession because the test-bench adapter emptied the pipeline only after valid instruction execution. Cross-Level Processor Verification via