Name Strings

SPV_ARM_core_builtins

Contact

To report problems with this extension, please open a new issue at:

https://github.com/KhronosGroup/SPIRV-Headers

Contributors

  • Kévin Petit, Arm Ltd.

  • Christopher Gautier, Arm Ltd.

Notice

Copyright (c) 2021 Arm Ltd.

Status

Complete.

Version

Last Modified Date

2021-11-29

Revision

1

Dependencies

This extension is written against the SPIR-V Specification, Version 1.5 Revision 5.

This extension requires SPIR-V 1.0.

Overview

This extension adds new builtin decorations that can be used to decorate integer variables giving programs a means to query information about the cores and warps it is running on.

Extension Name

To use this extension within a SPIR-V module, the following OpExtension must be present in the module:

OpExtension "SPV_ARM_core_builtins"

Modifications to the SPIR-V Specification, Version 1.5

Builtin

Modify section 3.21, "Builtin", adding these rows to the Builtin table:

Builtin Enabling capability

4160

CoreIDARM
An ID between 0 and CoreMaxIDARM for the core the current invocation is running on.

CoreBuiltinsARM

4161

CoreCountARM
The number of cores on the device.

CoreBuiltinsARM

4162

CoreMaxIDARM
The max ID that can be reported for a core. This may be different from CoreCountARM - 1.

CoreBuiltinsARM

4163

WarpIDARM
An ID between 0 and WarpMaxIDARM (per core) for the warp the current invocation is running on.

CoreBuiltinsARM

4164

WarpMaxIDARM
The max ID that can be reported for a warp.

CoreBuiltinsARM

Capabilities

Modify Section 3.31, "Capability", adding these rows to the Capability table:

Capability Depends On

4165

CoreBuiltinsARM
Uses the CoreIDARM, CoreCountARM, CoreMaxIDARM, WarpIDARM, WarpMaxIDARM builtin decorations.

Revision History

Rev Date Author Changes

1

2021-11-29

Kévin Petit

Initial revision