This extension allows the use of the SPV_KHR_subgroup_uniform_control_flow SPIR-V extension in shader modules. SPV_KHR_subgroup_uniform_control_flow provides stronger guarantees that diverged subgroups will reconverge.

Developers should utilize this extension if they use subgroup operations to reduce the work performed by a uniform subgroup. This extension will guarantee that uniform subgroup will reconverge in the same manner as invocation groups (see “Uniform Control Flow” in the Khronos SPIR-V Specification).

VK_KHR_shader_subgroup_uniform_control_flow

Name String

VK_KHR_shader_subgroup_uniform_control_flow

Extension Type

Device extension

Registered Extension Number

324

Revision

1

Extension and Version Dependencies

Version 1.1

Contact

• Alan Baker alan-baker

Other Extension Metadata

Last Modified Date

2020-08-27

IP Status

No known IP claims.

Interactions and External Dependencies

• Requires SPIR-V 1.3.
• This extension requires SPV_KHR_subgroup_uniform_control_flow
• This extension provides API support for GL_EXT_subgroupuniform_qualifier

Contributors

• Alan Baker, Google
• Jeff Bolz, NVIDIA