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Register File

Concept

A register file is the processor component/model element that holds the architecturally visible registers. In architectural-state descriptions it is typically grouped with status flags and the program counter, and instruction semantics read and update it through next-state functions or helper macros such as write_reg.

First seen 5/25/2026
Last seen 7/18/2026
Evidence 42 chunks
Wiki v2

WIKI

Definition

A register file is the set of processor registers represented in an architectural model. In architectural-style processor descriptions, the architectural state is commonly modeled as a user-defined record that combines the register file with other state such as status flags and the program counter. This architectural state corresponds to the programmer-visible view of the design. [Register file as architectural state]

Use in instruction semantics

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NEIGHBORHOOD

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RELATIONSHIPS

15 connections
Architectural State part of → 100% 2e
The register file is a component of the architectural state.
Synthesizing Instruction Selection Rewrite Rules from RTL using SMT ← mentions 90% 2e
The paper discusses register files as programmable states in architecture formalization.
write_reg macro ← uses 100% 2e
The write_reg macro updates the register file entries.
Write Port Contention ← mentions 93% 2e
Write port contention commonly occurs at shared register files in CPUs.
pipeline CPU architecture part of → 90% 2e
The register file is a component of pipeline CPU architectures.
Instruction Execution Unit ← uses 90% 2e
The instruction execution unit interacts with the register file
Interface Model ← uses 100% 2e
The interface model provides API for register file access
Y86-64 part of → 100% 1e
The Y86-64 ISA includes a register file with 15 program registers.
Ibex Core part of → 95% 1e
The Register File is included in the Ibex Core.
Instruction Set Architecture ← mentions 90% 1e
The ISA includes a register file as part of its architectural state.
Instruction Set Simulator part of → 90% 1e
An ISS contains a register file with registers including CSRs.
MIPS Pipeline part of → 90% 1e
The register file is a user-visible memory element in the MIPS pipeline.
gameboyprocessor part of → 97% 1e
The gameboyprocessor class contains eight 8-bit registers forming the register file.
RISC-V part of → 97% 1e
The Register File is a key block of the RISC-V processor core.
General-Purpose Register (GPR) ← part of 90% 1e
General-purpose registers make up the register file in RISC-V CPUs.

LINKED ENTITIES

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write_reg macro USES Extracted graph relationship
Architectural State PART_OF Extracted graph relationship

CITATIONS

7 sources
7 citations — click to expand
[1] Register file as architectural state Generating an Efficient Instruction Set Simulator from a Complete Property Suite
[2] Next-state register update Generating an Efficient Instruction Set Simulator from a Complete Property Suite
[3] write_reg behavior Generating an Efficient Instruction Set Simulator from a Complete Property Suite
[4] Pipeline abstraction Generating an Efficient Instruction Set Simulator from a Complete Property Suite
[5] ISS generation Generating an Efficient Instruction Set Simulator from a Complete Property Suite
[6] Register file sizes Generating an Efficient Instruction Set Simulator from a Complete Property Suite
[7] GPU register-file considerations A GPU Register File using Static Data Compression; GREENER: A Tool for Improving Energy Efficiency of Register Files