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Lowered VIAM

Technique

Lowered VIAM is the TCG-oriented form of the VADL Intermediate Architecture Model used in OpenVADL's QEMU frontend generation pipeline. It is produced by transforming VIAM into operations such as TCG add and move nodes, and it serves as the input to generated C translation functions for QEMU.

First seen 5/29/2026
Last seen 5/29/2026
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Overview

Lowered VIAM is an intermediate representation used in the OpenVADL QEMU-generation flow. In the presented pipeline, a VADL specification is processed into a VADL Intermediate Architecture Model (VIAM), then transformed into Lowered VIAM, and finally passed to C-Code Generation to produce a QEMU frontend. The QEMU-generation diagram shows this sequence as: VIAMTCG TransformationLowered VIAMC-Code GenerationQEMU Frontend.[pipeline]

The purpose of Lowered VIAM is to express instruction semantics in a form closer to QEMU's Tiny Code Generator (TCG). The source material summarizes the approach as automatic QEMU frontend generation by "lowering the intermediate representation (VIAM) to TCG operations."[purpose]

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RELATIONSHIPS

2 connections
C-Code Generation ← depends on 95% 1e
C-code generation takes lowered VIAM as input in the OpenVADL pipeline.
VADL Intermediate Architecture Model (VIAM) derived from → 95% 1e
Lowered VIAM is derived from the VIAM after applying TCG transformation.