SubgroupLtMask(3)

Name

SubgroupLtMask - Mask of shader invocations in a subgroup with a lower subgroup local invocation ID

Description

SubgroupLtMask

Decorating a variable with the SubgroupLtMask builtin decoration will make that variable contain the subgroup mask of the current subgroup invocation. The bits corresponding to the invocations less than SubgroupLocalInvocationId are set in the variable decorated with SubgroupLtMask. All other bits are set to zero.

SubgroupLtMaskKHR is an alias of SubgroupLtMask.

Valid Usage

  • VUID-SubgroupLtMask-SubgroupLtMask-04378
    The variable decorated with SubgroupLtMask must be declared using the Input Storage Class

  • VUID-SubgroupLtMask-SubgroupLtMask-04379
    The variable decorated with SubgroupLtMask must be declared as a four-component vector of 32-bit integer values

See Also

No cross-references are available

Document Notes

For more information, see the Vulkan Specification (NOTE: cannot determine Specification page containing this refpage).

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.