test generator
ConceptA test generator is a processor-verification tool used to generate instruction tests, including constrained-random instruction streams. In RISC-V verification, test generators are useful but insufficient on their own because coverage gaps and microarchitectural corner cases can remain, motivating hybrid strategies that also use formal verification.
First seen 5/27/2026
Last seen 5/27/2026
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Definition
A test generator is a verification tool used in processor verification to create instruction-based tests. In the RISC-V verification context, teams may build test generators or use verification suites to check whether instructions execute correctly, but this is only one part of processor verification.[1]
Role in processor verification
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1 connectionsProcessor verification employs test generators to validate instruction execution.
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[1] test generators are used in processor verification to check instruction execution, but this is only part of the problem RISC-V Microarchitecture Verification Approaches
[2] historically, processor companies built test generators and formal tools in-house; RISC-V is creating demand for specialized verification tools RISC-V Microarchitecture Verification Approaches
[3] UVM supports constrained-random instruction generation, and constrained-random generators can produce large targeted instruction sets RISC-V Microarchitecture Verification Approaches
[4] coverage from instruction testing may not cover all operand and microarchitectural combinations RISC-V Microarchitecture Verification Approaches
[5] simulation-based verification alone is inadequate for processors, motivating formal verification RISC-V Microarchitecture Verification Approaches
[6] a hybrid approach combines constrained-random testing of components with formal verification to reduce missed corner cases RISC-V Microarchitecture Verification Approaches
[7] RISC-V verification demand is increased by openness, extensibility, few standard/open tools, and the difficulty of verifying extensions RISC-V Microarchitecture Verification Approaches