AV-Swap

Concept

AV-Swap is an operation in generalized tandem simulation in which the values of instruction-level architectural variables (ILAVs) are transferred to the corresponding RTL architectural variables (RTAVs) of the RTL-based execution model (RTEM). It is performed by the AV-Converter component in Scenario 3 of the tandem simulation flow and is the mechanism that enables jump-starting the RTEM from the state produced by the ILEM, reducing the warm-up overhead of cross-level simulation.

First seen 6/6/2026

Last seen 6/6/2026

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AV-Swap

Definition

In the generalized tandem simulation methodology proposed by Xing, Gupta, and Malik (ASPDAC 2022), AV-Swap denotes the operation of copying the values of the instruction-level architectural variables (ILAVs) maintained by the instruction-level execution model (ILEM) into the corresponding RTL architectural variables (RTAVs) of the RTL-based execution model (RTEM). The correspondence between ILAVs and RTAVs is established by the AV map, an augmentation of the ILA refinement map.

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RELATIONSHIPS

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Jump-Starting (Warm-Up Simulation) ← uses 97% 2e

Jump-starting uses AV-Swap to transfer architectural variable values

Tandem Simulation ← uses 97% 1e

Tandem simulation uses AV-Swap for jump-starting

AV-Converter ← implements 97% 1e

AV-Converter implements the AV-Swap functionality

LINKED ENTITIES

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Tandem Simulation USES Extracted graph relationship

AV-Converter IMPLEMENTS Extracted graph relationship

Jump-Starting (Warm-Up Simulation) USES Extracted graph relationship

CITATIONS

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3 citations — click to collapse

[1] AV-Swap is invoked in Scenario 3 of the tandem simulation flow to swap AVs and perform jump-start, and is implemented by the AV-Converter based on the AV map. Generalizing Tandem Simulation: Connecting High-level and RTL Simulation Models

[2] Tandem simulation allows swapping in values from ILAVs to RTAVs (AV-Swap), which can be leveraged to jump-start the RTEM in the middle of an ILEM simulation, significantly reducing simulation time by leaving the warm-up part of the test to only the ILEM. Generalizing Tandem Simulation: Connecting High-level and RTL Simulation Models

[3] AV-Swap is automated via a cold-start map: a cold start sets RTL micro-architectural variables to reset values, the AV map then sets RTAVs from ILAVs, and the pre-swap cycle/sequence and swap-cycle fields of the cold-start map handle reset and the holding time for swapped RTAVs. Generalizing Tandem Simulation: Connecting High-level and RTL Simulation Models